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  • Other Sources  (12,644)
  • NASA Technical Reports  (12,644)
  • 1970-1974  (11,640)
  • 1950-1954  (903)
  • 1945-1949
  • 1935-1939  (101)
  • 1972  (11,640)
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  • 1935  (101)
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  • Other Sources  (12,644)
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  • 1970-1974  (11,640)
  • 1950-1954  (903)
  • 1945-1949
  • 1935-1939  (101)
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  • 1
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    Separation of the phenylalanyl and alanyl chains of bovine and ovine growth hormones by electrofocusing (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Life Sci. Publ., Vol. 2; 13 p
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  • 2
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    Miniature battery-operated electromagnetic flowmeter (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Life Sci. Publ., Vol. 2; 7 p
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  • 3
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    Jose Verocay: Pioneer Uruguayan Neuropathologist (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: AEROSPACE MEDICINE
    Type: Life Sci. Publ., Vol. 2; 4 p
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  • 4
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    Effects of hyperoxia on lung ultrastructure (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: AEROSPACE MEDICINE
    Type: Life Sci. Publ., Vol. 2; 2 p
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  • 5
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    Search for viable organisms in lunar samples: Gas changes over Apollo 14 fines wet by aqueous media (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Life Sci. Publ., Vol. 2; 3 p
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  • 6
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    Determination of chromatographic resolution for peaks of vast concentration differences (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Life Sci. Publ., Vol. 2; 2 p
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  • 7
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    Organic geochemistry of Early Precambrian sediments (1972)
    In:  Other Sources
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    Publication Date: 2011-12-21
    Keywords: GEOPHYSICS
    Type: Life Sci. Publ., Vol. 2; 11 p
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  • 8
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    Distribution of carbon and sulfur in hydrolyzed Apollo 15 lunar fines (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: Life Sci. Publ., Vol. 2; 5 p
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  • 9
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    Carbon, nitrogen and sulfur released during pyrolysis of bulk Apollo 15 fines (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-12-21
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Life Sci. Publ., Vol. 2; 3 p
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  • 10
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    The influence of clinostat rotation on the fertilized amphibian egg (1972)
    In:  Other Sources
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    Publication Date: 2011-12-21
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Life Sci. Publ., Vol. 2; 13 p
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  • 11
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    Regulation of carbon dioxide fixation in chemo-autotrophic bacteria (1972)
    In:  Other Sources
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    Publication Date: 2011-12-21
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Life Sci. Publ., Vol. 2; 5 p
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  • 12
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    The state of binding of intracellular K(+) in Halobacterium cutirubrum (1972)
    In:  Other Sources
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    Publication Date: 2011-12-21
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Life Sci. Publ., Vol. 2; 3 p
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  • 13
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    Isolation of carbohydrate-metabolizing, extremely halophilic bacteria (1972)
    In:  Other Sources
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    Publication Date: 2011-12-21
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Life Sci. Publ., Vol. 2; 4 p
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  • 14
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    Comparison of aerodynamic performance of several STOL concepts (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Wind tunnel tests to determine the aerodynamic characteristics of basically similar short takeoff aircraft were conducted. The investigations were designed to provide data for a systematic direct comparison of five of the concepts considered. The configurations of the five models are illustrated and described. The aerodynamic data are presented in the form of graphs. It was concluded that the most complex systems require the least amount of net thrust.
    Keywords: AIRCRAFT
    Type: NASA. Langley Res. Center STOL Technol.; p 111-120
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  • 15
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    Advanced wiring technique and hardware application: Airplane and space vehicle (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: An advanced wiring system is described which achieves the safety/reliability required for present and future airplane and space vehicle applications. Also, present wiring installation techniques and hardware are analyzed to establish existing problem areas. An advanced wiring system employing matrix interconnecting unit, plug to plug trunk bundles (FCC or ribbon cable) is outlined, and an installation study presented. A planned program to develop, lab test and flight test key features of these techniques and hardware as a part of the SST technology follow-on activities is discussed.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 21 p
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  • 16
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    Description of crimp contact (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Tapecon Mark 2 - no-strip-crimp connection is described. Results of humidity, thermal shock, corrosion, and life tests are included.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 11 p
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  • 17
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    Transition splices and cost comparison (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The development and testing of two designs of transition splices are reported. The design goal was to produce splice terminations that are electrically insulated to withstand the environmental conditions of commercial aircraft and are capable of being repaired and reworked on installed cables with the use of hand tools. In addition, a cost study comparison of FCC vs. RCC is reported. The comparison was made on a basis of 10 aircraft with each vehicle using approximately 100,000 feet of wiring and 2,000 connectors. The results are tabulated for seven different wiring configurations.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 35 p
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  • 18
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    Manufacturing and quality control of FCC harnesses (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Saturn 5 program contractors encountered many technological challenges and problems relative to inter-connecting wiring and cabling during the development stages of the Saturn program. The knowledge gained from solving these problems, plus recently developed state-of-the-art techniques, materials, and processes were documented in a report prepared for NASA/MSFC. The portions of that report which deal with FCC harnesses are presented.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 89 p
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  • 19
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    Cable design (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The importance of material selection is stressed in the design and manufacture of FCC. Several applications of flat conductor cable are discussed relative to material selection and the reasons for using a particular material for each application is explained.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 25 p
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  • 20
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    HALAR fluoropolymer: A versatile insulation material (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Research directed toward developing materials for the wire and cable industry has resulted in a new product, E-CTFE copolymer, which has an outstanding combination of electrical, thermal, and mechanical properties. The properties of E-CTFE are discussed and compared with those of other commercial fluoropolymers. Particular attention is given to the utility of E-CTFE as a wire and cable insulation.
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 14 p
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  • 21
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    Solar corona photography, part B (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Photographic observations of the solar corona by the Apollo 16 command module pilot while in lunar orbit are reported. These were designed to provide data on outer coronal forms and intensities to elongation angles of 25 deg. The results of Apollo 15 solar corona photography verified the procedures and provided the first photographs of identifiable coronal streamers curving at elongation angles of some 10 deg. By using the Apollo 15 data, exposure settings were optimized for Apollo 16, and the results show a significant improvement in photometric quality over the large range of brightness to be photographed. Ground observations of the inner solar corona (to approximately 2 solar radii from Sun center) indicate a general lack of coronal structure, and results of data reduction thus far show no streamer structure at large elongation angles.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 16 Prelim. Sci. Rept.; 2 p
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  • 22
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    Astronomical photography. Part A: Gum nebula, galactic cluster, and zodiacal light photography (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: It is reported that the Apollo 16 command module astronomical photography was performed with the specific objective of capitalizing on the uniqueness of the double umbra as a vantage point to collect astronomical data that are obtainable only near our Moon. For this reason, these data will be compared directly to analogous photography performed from Earth orbit during Project Mercury and the Gemini Program as well as to the Apollo-duplicated photography taken from sites on the Earth surface. Comparison with Earth-based photography should yield direct information on the Earth airglow layer and on atmospheric scattering and extinction.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 16 Prelim. Sci. Rept.; 2 p
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  • 23
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    Physical and geological aspects of heiligenschein measurements, part Y (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A preliminary attempt was made to evaluate the geological significance of the dispersion in the heiligenschein index. Heiligenschein coordinates were plotted on the 1:5,000,000 geologic map of the near side of the moon. The purpose was to evaluate the specific geologic unit involved in the case of each heiligenschein display. Tentative results that list the mean heiligenschein index and the rms deviation for each geologic map unit are given.
    Keywords: PHYSICS, GENERAL
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 7 p
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  • 24
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    Apollo 16 landing site: Summary of earth based remote sensing data, part W (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Infrared and radar studies of the Apollo 16 landing site are summarized. Correlations and comparisons between earth based remote sensing data, IR observations, and other data are discussed in detail. Remote sensing studies were devoted to solving two problems: (1) determining the physical difference between Cayley and Descartes geologic units near the landing site; and (2) determining the nature of the bright unit of Descartes mountain material.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 5 p
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  • 25
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    The Alhazen to Abul Wafa swirl belt: An extensive field of light colored, sinuous markings, part T (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Problematic causes and characteristics of light colored sinuous markings on the lunar surface are explored. Two processes, exogenetic and endogenetic, are examined in detailed. During the endogenetic process it is suggested that impact ejecta deposition and surface disturbances cause the markings. During the endogenetic process, it is suggested that extrusive volcanism and sublimation and/or alteration cause the markings.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 4 p
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  • 26
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    Lunar volcanism: Fracture patterns and rilles in marginal premare craters, part R (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Probable causes, distributions, and nature of fracture patterns of Type 3 craters around the margins of major maria are investigated.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 1 p
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  • 27
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    Selected volcanic and surficial features, part O (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Metric camera photographs are used to analyze volcanic and surficial features of the lunar surface between Mare Smythii and King Crater. Patterns created by lava flows, ejecta blankets, impact debris, and fissures are discussed in detail. Possible causes of each phenomena are suggested.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 1 p
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  • 28
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    FCC in Viking articulated boom (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The application requirements and manufacturing techniques for the flat conductor cable used in the Viking Lander Articulated Boom Unit are described. The Viking Boom is a 3-axis device utilized to position a soil sampler and provide digging forces. This application imposed severe restrictions on size, weight, materials, and choice of manufacturing processes. The final cable assembly design resulted in a combination of collated cable and flexible circuits assembled by resistance welding techniques.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 16 p
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  • 29
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    FCC for homewiring (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The application of flat conductor cable technology to surface mounted homewiring was investigated. Baseboard concepts, safety aspects, problems, and advantages are discussed.
    Keywords: ELECTRONIC EQUIPMENT
    Type: Flat Conductor Cable Symp.; 16 p
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  • 30
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    CJ concept for advanced aircraft wiring (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The techniques and hardware are described which were developed for facilitating the use of flexible flat conductor cable (FFCC) in commercial air transports. The system was designed as an evolutionary transition from the current round wire harnessing to the use of FFCC harnesses. The equipment discussed includes the pressure crimp barrel designed for terminating FFCC, reel-fed applicator, cable connectors and adaptors, and equipment racks.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 7 p
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  • 31
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    Crater morphometry, part L (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Morphometric analysis of lunar craters complements the more traditional photointerpretive study of crater morphology. A sampling is presented of morphometric results for five selected medium-sized craters photographed on the Apollo 16 mission: Madler, Langrenus B, Isidorus, Capella, and King. Apollo metric camera data present the first real opportunity to evaluate previous topographic measurements in terms of accuracy rather than in terms of precision. This method of generating crater measurements furnishes far more complete data than does the shadow-length method that yielded most of the previous morphometric information on lunar craters.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 6 p
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  • 32
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    Reinterpretations of the northern Nectaris Basin, part F (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Photogeologic analysis was attempted on a strip of Apollo 16 metric photographs; the superior quality and stereographic properties of the photography permitted this reevaluation. Geologic contacts, as redrawn closely resemble those of earlier maps, but some differences resulted because of improved photographic quality and a conscious attempt to test fully the impact hypothesis. All or most of the nonmare material of the region of the northern Nectaris Basin rim can be explained by the formation of impact basins. This interpretation seems strained only for some irregular and clustered craters north of Mare Nectaris and for the southern facies of the Descartes material. If the latter material is shown to have been sampled and to be of impact origin, then extensive hill and crater-forming volcanic material of Imbrian or younger age probably does not exist on the lunar terra.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 4 p
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  • 33
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    Thermal characteristics under load (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A theoretical study was made of the temperature profile in a flat conductor cable. The conductor temperature rise was determined under full load and partial load conditions in an air environment as a function of the current. Similar results were obtained for the fully loaded single cable in vacuum and also for the case of one side of the cable in contact with a heat sink. The results are in good agreement with experimental values, where available.
    Keywords: ELECTRONIC EQUIPMENT
    Type: NASA. Marshall Space Flight Center Flat Conductor Cable Symp.; 28 p
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  • 34
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    Photogrammetry using Apollo 16 orbital photography, part B (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Discussion is made of the Apollo 15 and 16 metric and panoramic cameras which provided photographs for accurate topographic portrayal of the lunar surface using photogrammetric methods. Nine stereoscopic models of Apollo 16 metric photographs and three models of panoramic photographs were evaluated photogrammetrically in support of the Apollo 16 geologic investigations. Four of the models were used to collect profile data for crater morphology studies; three models were used to collect evaluation data for the frequency distributions of lunar slopes; one model was used to prepare a map of the Apollo 16 traverse area; and one model was used to determine elevations of the Cayley Formation. The remaining three models were used to test photogrammetric techniques using oblique metric and panoramic camera photographs. Two preliminary contour maps were compiled and a high-oblique metric photograph was rectified.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 5 p
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  • 35
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    Color contrasts in Mare Nubium and the Southern Oceanus Procellarum, part V (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The distribution of subtle but definite color variations on the lunar surface is analyzed using Apollo 16 photographs. Results show the strongest color variations and most distinct boundaries are concentrated in the northwest quadrant of the moon, where major boundaries correspond with distal fronts of a complex and prominent series of lava flows.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 1 p
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  • 36
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    Photogrammetry and altimetry. Part A: Apollo 16 laser altimeter (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The laser altimeter measures precise altitudes of the command and service module above the lunar surface and can function either with the metric (mapping) camera or independently. In the camera mode, the laser altimeter ranges at each exposure time, which varies between 20 and 28 sec (i.e., 30 to 43 km on the lunar surface). In the independent mode, the laser altimeter ranges every 20 sec. These altitude data and the spacecraft attitudes that are derived from simultaneous stellar photography are used to constrain the photogrammetric reduction of the lunar surface photographs when cartographic products are generated. In addition, the altimeter measurements alone provide broad-scale topographic relief around the entire circumference of the moon. These data are useful in investigating the selenodetic figure of the moon and may provide information regarding gravitational anomalies on the lunar far side.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 16 Prelim. Sci. Rept.; 5 p
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  • 37
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    Mare ridges and arches in Southern Oceanus Procellarum, part S (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Stereoscopic lunar photographs were used to study the form of mare ridges and arches, their relative ages, and their association with fractures and sinuous rilles in the Southern Oceanus Procellarum.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 3 p
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  • 38
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    Lunar volcanism: Mare ridges and sinuous rilles, part P (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Additional evidence of the volcanic origin of mare ridges and sinuous rilles is provided by near-terminator photography of the Herigonius Rille area (12 deg S 37 deg W) northeast of Gassendi Crater. A possible genetic relationship between ridges and rilles is illustrated. From the figure, the following relationships are evident. (1) The most prominent rille crosses several ridges without distortion, which indicates that the mare ridges did not form after the sinuous rilles. (2) The rilles could not have formed by flow up and over the ridges. (3) The rilles extend from their widest ends toward distinctly lower elevations, and the largest one branches both north and south from the vent area. Elevations are evident in stereographic views that clearly indicate the local slopes. (4) The wider end of each rille is marked by an elongate vent (?) near the summit of the mare ridge from which the rille appears to issue. (5) The two most prominent rilles join south of the vent area and continue southward for more than 130 km.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 1 p
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  • 39
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    Artificial lunar impact craters: Four new identifications, part I (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 16 panoramic camera photographed the impact locations of the Ranger 7 and 9 spacecraft and the S-4B stage of the Apollo 14 Saturn launch vehicle. Identification of the Ranger craters was very simple because each photographed its target point before impact. Identification of the S-4B impact crater proved to be a simple matter because the impact location, as derived from earth-based tracking, displayed a prominent and unique system of mixed light and dark rays. By using the criterion of a dark ray pattern, a reexamination of the Apollo 14 500 mm Hasselblad sequence taken of the Apollo 13 S-4B impact area was made. This examination quickly led to the discovery of the ray system and the impact crater. The study of artificial lunar impact craters, ejecta blankets, and ray systems provides the long-needed link between the various experimental terrestrial impact and explosion craters, and the naturally occurring impact craters on the moon. This elementary study shows that lunar impact crater diameters are closely predictable from a knowledge of the energies involved, at least in the size range considered, and suggests that parameters, such as velocity, may have a profound effect on crater morphology and ejecta blanket albedo.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 6 p
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    Structural aspects of Imbrium sculpture, part G (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Apollo 16 metric photographs taken at low to high sun angles provided the first stereographic coverage of the distinctive landforms collectively referred to as Imbrium sculpture. The sculpture consists of a series of nearly linear ridges and troughs extending radially outward for more than 1000 km from the rim of the Imbrium Basin. The origin of the ridges and troughs, whether by deposition and impact scoring by fluidized clouds of ejecta from the Imbrium Basin or by faulting and volcanism during and subsequent to basin formation, is controversial. Evidence indicative of the mode of origin of Imbrium sculpture is summarized as follows. Evidence of volcano-tectonic mode of origin is favored by: (1) wide variation in relative age of parts of the sculpture; (2) furrows without rims; (3) absence of ballistic shielding; (4) asymmetry of sculpture; (5) absence of randomly oriented clusters; and (6) association with other features of structural origin. An origin by ejecta scoring and deposition is favored by the gradational ejecta with a Fra Mauro-type texture. Features that are ambiguous as to mode or origin are furrows made of coalesced crater chains and prominent rims on furrows.
    Keywords: SPACE SCIENCES
    Type: NASA. Lyndon B. Johnson Space Center Apollo 16 Prelim. Sci. Rept.; 2 p
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    Lunar surface magnetometer experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 16 lunar surface magnetometer (LSM) activation completed the network installation of magnetic observatories on the lunar surface and initiated simultaneous measurements of the global response of the moon to large-scale solar and terrestrial magnetic fields. Fossil remanent magnetic fields have been measured at nine locations on the lunar surface, including the Apollo 16 LSM site in the Descartes highlands area. This fossil record indicates the possible existence of an ancient lunar dynamo or a solar or terrestrial field much stronger than exists at present. The experimental technique and operation of the LSM are described and the results obtained are discussed.
    Keywords: SPACE SCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 14 p
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    Preliminary geologic investigation of the Apollo 16 landing site (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Preliminary results of examining the lunar rock samples from the Apollo 16 flight are reported. Topics discussed include: premission geologic studies, geologic objectives, description of the site and traverse routes, superficial deposits, and station descriptions.
    Keywords: SPACE SCIENCES
    Type: Apollo 16 Prelim. Sci. Rept.; 81 p
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    Design integration and noise study for a large STOL augmentor wing transport (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Analysis, design, experimental static testing, wind-tunnel testing, and design integration studies are used to develop an augmentor wing jet flap configuration for a jet STOL transport aircraft having maximum propulsion and aerodynamic performance with minimum noise generation. The program has three basic elements: (1) static testing of a scale wing section to demonstrate augmentor performance and noise characteristics; (2) two-dimensional wind-tunnel testing to determine flight-speed effects on performance, and (3) system design and evaluation that optimizes the complete system and ensures that the design is compatible with the requirements for a large STOL transport having a 500-foot sideline noise of 95 perceived noise decibels (PNdb) or less.
    Keywords: AIRCRAFT
    Type: NASA. Lewis Res. Center Aircraft Engine Noise Reduction; p 291-304
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    Quiet engine demonstration (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A description of the performance test to compare noise output from a quiet engine with acoustic nacelle to the noise output of the JT3D turbofan engine is presented. Tabulations depict comparative thrusts, bypass ratios, core jet velocities, and fan jet velocities for both engines during simulated takeoff and approach performances.
    Keywords: AIRCRAFT
    Type: Aircraft Engine Noise Reduction; p 215-218
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    Fan noise suppression (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The principal suppressor parameters and their relationships have been used to formulate a suppressor design methodology which has been applied to the design of several full-scale suppressors. Tests of these suppressors on several full-scale fans have demonstrated noise reductions of the order of 10 PNdB. The amount of suppression in several instances seems to have been limited by reaching noise floors that are not clearly at the estimated jet noise level but are not far above it. In addition to identifying noise floors, two other areas are considered. The first is attenuation by the fan exhaust suppressors, which seems in most cases to be less than that of the inlet. The second is the effectiveness of outer cowl treatment alone on multiple pure tones. This question relates to whether a high-speed fan can become as quiet as a low-speed fan without a substantial increase in the amount of treatment.
    Keywords: AIRCRAFT
    Type: Aircraft Engine Noise Reduction; p 63-102
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    Chemistry of the upper atmosphere and the role of transport processes (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The important chemical reaction affecting the neutral composition of the upper stratosphere, mesosphere, and lower thermosphere is discussed. The role of atmospheric transport processes is emphasized and the problem of taking these into account is elucidated.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Phys. of the Space Environment; p 147-155
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    Transient heating in the upper atmosphere (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The time-dependent response of the upper atmosphere to transient heat sources is considered. The basic problem is that of heating a compressible, heat-conducting fluid, which is described in the one-dimensional case by an analytic solution. Comparisons with satellite drag data of such first-order solutions are shown to be useful in determining energy requirements and in determining some constraints on the spatial distribution of the heating. Recent OGO-6 mass spectrometer and interferometric temperature measurements show that atmospheric disturbances during geomagnetic storms are much more prominent in the auroral zones. These results suggest that joule dissipation of auroral currents are important contributors to orbital perturbations of satellites.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Phys. of the Space Environment; p 3-23
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    Composite systems utilization for space shuttle structures (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Research and development of composite material systems to show applicability of these materials to shuttle structures and to demonstrate availability through a hardware development program is reported. The various configurations studied and potential areas of composite structures use are described and an outline of ongoing composite programs, complementing the indicated feasible applications, including a typical cost study, is shown. The following composite systems are investigated: Boron filaments with epoxy, polyimide, or aluminum matrix, and graphite filaments with epoxy or polyimide matrix.
    Keywords: SPACE VEHICLES
    Type: NASA Space Shuttle Technol. Conf.; p 605-644
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    Flight loads and control (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The prediction of flight loads and their potential reduction, using various control logics for the space shuttle vehicles, is very complex. Some factors, not found on previous launch vehicles, that increase the complexity are large lifting surfaces, unsymmetrical structure, unsymmetrical aerodynamics, trajectory control system coupling, and large aeroelastic effects. Discussed are these load producing factors and load reducing techniques. Identification of potential technology areas is included.
    Keywords: SPACE VEHICLES
    Type: NASA Space Shuttle Technol. Conf.; p 175-203
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    New considerations for pogo prevention on space shuttle (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Recommendations for improving the methodology of pogo suppression for the space shuttle include: Consideration of inter-pump location for accumulator or active device, inclusion of tank outflow effects in dynamic structural analysis, the use of simplified transfer functions in systems studies, three phase dynamic testing program for turbopump with development of dynamic flowmeters, and the use of a linearized mathematical model for engine physics studies.
    Keywords: SPACE VEHICLES
    Type: NASA, Washington NASA Space Shuttle Technol. Conf.; p 97-116
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    Dissipation of electric fields in the ionosphere (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The heating and movement of the upper atmosphere at ionospheric levels in response to electric currents are discussed. Joule dissipation, generation of winds, and pressure gradients are significant factors in the energetics of the ionospheric electric currents flowing during magnetic storms and also of the Sq current system.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Phys. of the Space Environment; p 25-40
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    Preliminary examination of Surveyor 3 components for impact phenomena (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Two pieces of the Surveyor 3 spacecraft recovered during the Apollo 12 mission were examined for secondary lunar ejecta and micrometeorite impacts. One piece was section E of the aluminum strut; the other was the nickel-coated beryllium television camera mirror.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 151-153
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    Organic contamination analysis: High resolution mass spectrometric analysis of surface organics on selected areas of Surveyor 3 (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The mirror and middle shroud were extracted for organics by washing the surfaces with solvents. The techniques are discussed. Ion microprobe analyses of the primarily atomic species are presented. The sources of the organic contaminants are: (1) hydrocarbons from lubricating oils and general terrestrial contamination, (2) dioctyl phthalate, probably from polyethylene bagging material (the plasticizer), (3) carboxylic acids from decomposition of grease and general terrestrial contamination, (4) silicones from sources such as lubricating oil, (5) outgassing of electronics and plasticizer, (6) vinyl alcohol and styrene copolymer, probably from electronic insulation, and (7) nitrogenous compounds from the lunar module and possibly Surveyor 3 engine exhaust.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 127-142
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    Spacecraft orientation and exposure to environment, Appendix A (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Material removed from the spacecraft and returned to earth remained on the lunar surface for 31.9 lunations. None of the returned parts received the maximum 10,686 hours of exposure because of shadowing by the planar array antenna, solar panel, thermal control compartments, or other parts of the spacecraft. To determine the actual exposure of specific parts to sunlight, six series of photographs were taken. A one-fifth-scale model spacecraft was oriented to a collimated light source simulating the orientation of Surveyor with the sun. Three cameras were set up to view different parts of the spacecraft. The data obtained from these photographs permitted an evaluation of the effects of exposure to solar radiation on the camera and its parts, the surface sampling scoop, and the strut from the radar altimeter and Doppler velocity sensor.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 253-260
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    Preliminary results on tritium in Surveyor 3 material (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Painted aluminum samples taken from Surveyor 3 were examined for possible tritium implanted by the solar wind. There was found to be a correlation of tritium content with exposure to sunlight. The amount of tritium in sample 1011,2 nearly perpendicular to the lunar surface exceeded the amount expected from the tritium content of lunar rock 12002 by at least a factor of 3. It is concluded that if there is tritium implanted by solar wind on lunar rocks, it is not retained by them.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 180-184
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    Results of examination of the returned Surveyor 3 samples for particulate impacts (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The television housing and a section of the strut of the radar altimeter and Doppler velocity sensor were examined optically and with a scanning electron microscope for particulate impacts. The white surface of the camera was discolored during the months the Surveyor 3 was on the moon; however, most of the craters must have occurred as a result of lunar dust sandblasted by the LM exhaust. The polished section of the strut exhibits contamination which appears brown and seems to be partially composed of crystals. Electron microscopic analysis of the strut section indicated no craters of hypervelocity impact origin, confirmed pitting density results of the optical scans, and indicated that material in the craters is of lunar origin. No meteorite impacts larger than 25 microns were detected on the tubing section.
    Keywords: SPACE SCIENCES
    Type: Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 158-167
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    Primary and secondary micrometeoroid impact rate on the lunar surface: A direct measurement (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Determination of the number of micrometeoroid impact craters on the camera provided an opportunity to make a sensitive direct measurement of the flux of interplanetary dust particles impacting the lunar surface. Optical and scanning electron microscope studies were performed. Low velocity impact and flux analyses are presented.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 143-151
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    Examination of the Surveyor 3 surface sampler scoop (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The operation and external appearance of the surface sampling scoop are discussed. An attempt was made to measure the magnitude of the existing adhesion between the lunar soil and the various surfaces of the scoop.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 100-114
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    Examination of Surveyor 3 parts with the scanning electron microscope and electron microprobe (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Two screws and two washers, several small chips of tubing, and a fiber removed from a third screw were examined with the scanning electron microscope and the electron microprobe. The purpose of the examination was to determine the nature of the material on the surface of these samples and to search for the presence of meteoritic material.
    Keywords: SPACE SCIENCES
    Type: NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 89-90
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    Development of methods for fracture control of space shuttle structures (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The technology with respect to fracture control requirements of the shuttle is considered. The current state-of-the-art does permit an approach based on linear elastic fracture mechanics concepts. Development and implementation of a fracture control plan should recognize deficiencies and provide adequate resources for the extensive empirical test data which are required. With respect to the cost impact of such tests, recent experiences involving advanced aircraft systems have seen unit cost increases of from 200 to 500 percent.
    Keywords: SPACE VEHICLES
    Type: NASA Space Shuttle Technol. Conf.; p 727-770
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    Ablator manufacturing (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Studies are being conducted to determine how manufacturing-induced defects affect the performance of ablative heat shields. If commonly occurring defects do not affect material performance, simpler manufacturing techniques can be used, quality control requirements can be relaxed, repair and rework operations can be held to a minimum, and thus the total manufacturing cost can be reduced.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: NASA Space Shuttle Technol. Conf.; p 475-504
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    Docking devices for Soyuz-type spacecraft (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Two docking device designs for Soyuz-type spacecraft are compared. The first was flight tested successfully; the second achieves rigid and exact joining of two spacecraft, while incorporating changes to allow for the intravehicular transfer of crew members. The main functions of the docking device are considered, with the means by which they are accomplished, and measures for increasing its reliability and flexibility in service are noted.
    Keywords: SPACE VEHICLES
    Type: 6th Aerospace Mech. Symp.; p 143-150
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    Antenna drive system for the Nimbus satellite (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A two-axis drive system is described for pointing a high gain antenna. Motion about each axis is provided by identical drive mechanisms. Only three gear passes are required to obtain the necessary 900:1 gear reduction. The drive system is a primary element of an experiment that will provide a real time data link between Nimbus and ground stations. Data are transmitted from Nimbus to the applications technology satellite, which relays the data to ground stations.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center 6th Aerospace Mech. Symp.; p 117-120
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    The Intelsat 4 antenna positioner (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The Intelsat 4 communications satellite has two spot beam antennas which are pointed to selected land masses by gimbaled positioners. The positioners employ drive motors with electromagnetic brakes and jackscrews that are self-caging during the launch. The positioner uses dry lubricants for ball bearings, spur gears, screw and nut, and various journal bearings. A coefficient of friction of approximately 0.05 was demonstrated in vacuum operation. Success of the positioner was demonstrated on the first Intelsat 4 placed in orbit in January 1971. The developmental problems that were encountered and their solutions are discussed.
    Keywords: COMMUNICATIONS
    Type: NASA. Ames Res. Center 6th Aerospace Mech. Symp.; p 109-116
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    NASA-ARC 36 inch airborne infrared telescope (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A 36 in. aperture telescope is being developed for installation aboard a NASA-Lockheed C-141A aircraft. This airborne observatory will permit observation of infrared emission at altitudes above 45,000 ft above much of the infrared-absorbing atmospheric water vapor. The telescope will look through a movable open port in the aircraft fuselage. A porous spoiler, upstream from the open port, will attenuate pressure disturbances and permit operation at ambient temperatures and pressures without an obscuring window. The telescope's entire structure is supported by a 16 in. spherical air bearing, which effectively isolates it from angular aircraft motions. This air bearing support, with inertial stabilization and star tracking, will permit net line of sight stability of better than 2 arcsec rms.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: 6th Aerospace Mech. Symp.; p 81-88
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    Stability of the Venus ionopause (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The ionopause of the Venus ionosphere, as indicated by Mariner 5 electron density data, and which occurs at 500km on the day side, and 2500km on the night side is discussed in terms of the solar wind interaction with the ionosphere. It is concluded that for a source of stabilization by heating to be effective, a small horizontal magnetic field is required to reduce the downward heat conduction of charged particles, and it has been shown that such a magnetic field is present.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 63-70
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    Evidence for the trough wind (1972)
    In:  CASI
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    Description: The existence of an upward flow of ionization along trough-field lines located at approximately 65 deg magnetic latitude is discussed. A flux model that fits the observed behavior of h(+0) and 0(+) was developed based on the existence of a trough wind. The measurements indicate a different behavior in the altitude distribution of ionized hydrogen in the plasmasphere as compared to the trough region. This difference is explained by the trough wind.
    Keywords: METEOROLOGY
    Type: Significant Accomplishments in Sci., 1970; p 52-57
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    Global winds from Nimbus temperature data for July 1970 (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Simulation studies to determine the best techniques for making use of vertical sounding temperature data are reported. An atmospheric model was developed to accept real SIRS radiance data from Nimbus 4 for June and July 1970. The results were compared to real observations. It was found that the model accepts real temperature data on a continuing basis, and real temperature data determine winds to a useful degree of accuracy.
    Keywords: METEOROLOGY
    Type: Significant Accomplishments in Sci., 1970; p 32-36
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    Nimbus observation of oceanic upwelling (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Observing the development of upwelling on the northeast coast of Africa by measuring ocean surface emission with infrared radiometers on Nimbus satellites is reported. Using the temperature of the ocean as telemetered by the satellite, the biological potential of an area is estimated, and consequently the highest potential for fisheries.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 14-17
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    Particle impact and optical property analysis of the surfaces of Surveyor 3 materials (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: As part of the investigation of Surveyor 3 materials, a study was conducted to determine the effect of the lunar environment on some of the painted and unpainted exterior surfaces. Examination of the camera parts and tube sections was conducted using three techniques: (1) optical and scanning electron microscopy, (2) energy dispersive X-ray probe analysis, and (3) spectral reflectance measurements.
    Keywords: SPACE SCIENCES
    Type: Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12; p 76-88
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    Sketch map of the region around Candidate Littrow Apollo landing sites, part H (1972)
    In:  CASI
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    Description: Photographs and geologic maps of the area around Littrow rilles and eastern edge of Mare Serenitatis are presented, along with variations in the features and compositions of the region.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 3 p
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    Very long baseline interferometry (1972)
    In:  CASI
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    Description: Some astronomical results, obtained by very long baseline interferometry, on quasi-stellar sources are reported. Data cover variations in optical luminosity, radio brightness variations, and observations of quasi-stellar nuclei.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 238-247
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    Extragalactic radio spectrum (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: An attempt was made to build a model for the observed continuous emission from extragalactic radio sources. The data, measured by RAE spacecraft, are compared to deduced measurements. The difference between the two is taken as the model for observed emission. Data also cover spectra for the anticenter, north halo minimum region, RAE low frequency observations, and ground based high frequency observations.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 227-230
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    Muon production (1972)
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    Description: The production of muons by collisions of primary cosmic ray particles with air nuclei is discussed. From these collisions pions and kaons are produced which then decay into muons. Two cases, oblique incidence and vertical incidence, are analyzed theoretically. Theoretical calculations agree well with observed data.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Significant Accomplishments in Sci., 1970; p 212-216
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    Interstellar electron intensity (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Two independent methods for measuring the electron intensity in interstellar space are proposed. The positron method involves the production of pions in proton-proton collisions, the decay of the pions into muons, and the subsequent decay of the muons into positrons. Results from detailed calculations of these processes are given in graphical form. The second method involves cosmic electron emitted synchrotron radiation in the interstellar magnetic field. These two methods are also used to analyze the spatial and temporal constancy of cosmic ray electrons in the galaxy.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 217-221
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    Spectral classification of X-ray sources (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The use of special detectors to measure and classify spectral X-ray sources in the region of a few keV and above, is discussed. Two sources, Cygnus X-2 and Cygnus X-3 were measured.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 196-199
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  • 77
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    Locations of solar radio bursts (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Measurements of the positions of the sources of solar radio bursts at decameter wavelengths, 20- to 60-MHz range, provide information about physical conditions in a region of the corona extending from about one-half to several solar radii from the surface of the sun. Position measurements in the 20- to 60-MHz range were made with the Clark Lake sweep-frequency grating interferometer. Although the resolution of the instrument is sufficient to measure source position accurately, the highly variable effect of refraction in the earth's ionosphere severely limits the observations, distorting position determinations to such an extent as to make much of the position data useless unless ionospheric refraction can be taken into account. A method was developed for the removal of the refractive effect from the data to permit determination of true source position. With this technique it is considered possible to measure spatial extent of radio sources that will provide information about emission processes and physical parameters in the corona.
    Keywords: COMMUNICATIONS
    Type: Significant Accomplishments in Sci., 1970; p 149-153
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    Photochemistry and lifetimes of interstellar molecules (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A quantitative discussion is presented of the lifetime against photodecomposition, or the probability of photodecomposition, of interstellar molecules. In addition to photodissociation, molecules can also be destroyed by interaction with high energy radiation and energetic particles. These processes are much less effective than destruction by ultraviolet radiation. However, when the ultraviolet is highly attenuated in clouds, the energetic radiation and particles will persist and will become relatively more important and the ultimate lifetimes in clouds may depend upon these processes.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 125-128
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  • 79
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    Periodic motions in the problems of three bodies (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: An example is given of the capture orbit for the general problem of three bodies and how it may be related to some practical problems in the solar system.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 107-111
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  • 80
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    Auger electrons (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Results are briefly described of efforts undertaken to assign proper electron transitions to the Auger lines of copper. Based on these investigations, using X-ray excitation and higher resolution, all three prominent Auger peaks of copper were determined to be L3MM type rather than L2MM type.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Significant Accomplishments in Sci., 1970; p 103-106
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    Climatic modification by CO2, H2O, and aerosol (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Research is reported on the effects of increasing the CO2, aerosols, and water content of the atmosphere on the surface temperature and climatology. An atmospheric model is described with the incoming solar radiation for a planetary albedo of 33 percent, surface temperature of 288 K, relative humidity of 75 percent, cloud cover of 48 percent, CO2 of 0.3 parts per thousand, and aerosol density of two million per square centimeter. The results show that if the CO2 increases by a factor of 1000 or more, the total pressure of the atmosphere increases, and the earth may become as hot as Venus. It is also shown that as the amount of dust particles in the atmosphere increases, the solar radiation decreases, and the surface temperature lowers.
    Keywords: METEOROLOGY
    Type: Significant Accomplishments in Sci., 1970; p 37-42
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    Microwave emission of Arctic Sea ice (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The feasibility of carrying microwave radiometers on Nimbus E and F missions for sea ice surveys was studied in the arctic using aircraft. It was found that passive microwave signatures of Arctic Sea ice relate specifically to the structure and type of ice. It is concluded that a new tool for conducting ice surveys from aircraft and satellites with remote sensors was discovered.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 18-21
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  • 83
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    Astronomical photography, part T (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Photographic observations of astronomical interest conducted during the Apollo 15 mission are discussed. Procedures used in photographing the solar corona are described together with calibration and reduction methods. In addition, selected preliminary results obtained from the photography are presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Its Apollo 15 Prelim. Sci. Rept.; 39 p
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  • 84
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    First earthshine photography from lunar orbit, part S (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The first photographs of the moon taken with earthshine illumination by the Apollo 15 crew were examined. Emphasis in the analysis was placed on a comparison of predicted exposures and obtained exposures. The results of the investigation indicate the following: (1) The predicted exposure of the maria areas and the obtained exposures were in reasonably close agreement. (2) The apparent-albedo values obtained for the floor of Aristarchus Crater are seven times greater than those for the maria.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 7 p
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  • 85
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    Regional variations in the magnitude of heiligenschein and causal connections, part O (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A preliminary quantitative analysis was conducted of four frames exposed by the Apollo 15 metric camera. Two of the frames show the zero-phase surge on maria and the other two show the surge on terrae. It was found that the curves resulting from brightness plotted as a function of phase angle, differ markedly according to which terrain type is involved. The magnitude of the heiligenschein was found to be significantly greater for the maria than for the terrae.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 1 p
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  • 86
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    Geologic sketch map of the candidate Proclus Apollo landing site, part K (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: An Apollo 15 panoramic camera frame was used as a base for a geologic sketch map of an area near Proclus Crater. The map was prepared to investigate the usefulness of the panoramic camera photography in large-scale geologic mapping and to assess the geologic value of the area as a potential Apollo landing site. The photographs, taken under high solar illumination, resulted in good definition of albedo features, and stereoscopic viewing provided extreme clarity of topographic relief with terrain units easily delineated. The geological characteristics of the area as evidenced by the high-resolution photographs is discussed. It is concluded that the panoramic camera photographs reveal a wealth of detail and are eminently suited for geologic mapping purposes. In addition, the Proclus area, as a potential landing site, offers relatively rough plains terrain.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 5 p
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  • 87
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    Advantages of cryopumping with liquid hydrogen instead of helium refrigerators (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Open loop hydrogen vaporizers and helium refrigerators are compared for operational complexity, installation and operating cost, and safety requirements. Data from two vacuum chambers using helium refrigerators are used to provide comparative data. In general, the use of hydrogen is attractive in the larger systems, even when extra safety precautions are taken. Emotional resistance to the use of hydrogen because of safety requirements is considered great. However, the experience gained in the handling of large quantities of cryogenics, particularly hydrogen and liquefied natural gases, should be considered in the design of open loop hydrogen cooling systems.
    Keywords: PHYSICS, GENERAL
    Type: NASA. Goddard Space Flight Center Space Simulation; p 549-554
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  • 88
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    The Gum nebula (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The distance from the sun to the center of the star, Gamma Velorium, is determined in an effort to draw a physical model and identify the ionized energy source of the Gum nebula. The distance is calculated from the local hydrogen density of radio astronomy studies and the hydrogen measure.
    Keywords: SPACE SCIENCES
    Type: Significant Accomplishments in Sci., 1970; p 190-195
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  • 89
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    Lineaments that are artifacts of lighting, part G (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Apollo 15 orbital photographs, particularly those taken at low sun elevation angles, are examined revealing grid patterns of lineaments. Preliminary results of experiments demonstrate that spurious lineaments and grid patterns can be produced and that the directions are dependent in part upon the position of the light source. The experiments were designed to duplicate the effect of bright sunlight reflecting from a hummocky surface with little or no diffuse light in the shadowed areas.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 5 p
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  • 90
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    Photogrammetric analysis of Apollo 15 records, part B (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The three cameras (stellar, mapping, and panoramic) together with the laser altimeter are included in the scientific instrument module bay, representing an integrated photogrammetric system. Data analysis objectives and procedure are presented, along with deformation of second generation negatives and heighting accuracy of panoramic photographs. Mapping camera photographs and stellar photography are evaluated. Rectified prints from panoramic camera photographs are produced, as well as enlarged prints from the mapping camera pictures.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 9 p
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  • 91
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    The particles and fields subsatellite magnetometer experiment (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A preliminary analysis of magnetometer data from Apollo 15 subsatellite is concluded. Remanent magnetization is a characteristic property of the moon, and the distribution is such that a complex pattern is produced. A mapping of the distribution is feasible with the present experiment. Lunar induction fields produced by transients in interplanetary magnetic field are detectable at satellite orbit. Magnetometer data will provide estimates of the latitude and longitude dependences of interior conductivity. The plasma void extends to some altitude below the satellite orbit and probably the lunar surface. Solar wind near the limbs is usually strongly disturbed.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spaceflight Center Apollo 15 Prelim. Sci. Rept.; 9 p
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  • 92
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    Electron impact ionization of H (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The results of theoretical calculations for the reactions between electrons and negative hydrogen atoms are discussed for an electron colliding with a negative hydrogen ion and neutralizing the hydrogen ion by stripping the loosely bound electron from it, and the two free electrons moving away. A semi-quantum description of the process is presented in which the target is described in terms of quantum mechanics, and the projectile electron is described in a classical fashion.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci., 1970; p 58-62
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  • 93
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    The process of crater removal in the lunar maria, part P (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: Near-terminator photography from the Apollo 14 and 15 missions is used as a basis to evaluate the processes by which craters disappear from the lunar surface. From observations and analyses it is concluded that: (1) The erosion of lunar craters in the size range of 10 m to 1 km is effected principally by small impacts producing minute changes in crater form up to the point where the crater is worn to an interior slope of approximately 1 degree. Below that slope, the annihilation process is dominated by the formation of younger overlapping craters. (2) The distribution of shapes of craters in this size range can be explained as resulting from impact generated processes.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 5 p
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    Mare Imbrium lava flows and their relationship to color boundaries, part M (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The Apollo 15 metric camera photography provided a number of spectacular views of most of the southern and central portions of the unique systems of major lava flows that stretch diagonally across Mare Imbrium from the general area of Euler Crater to a point east of Le Verrier Crater. A preliminary examination of the photographs indicates that the source of the material comprising the major flows is situated to the west of Euler Crater and south of the limits of the photographic coverage. The photographs also show clearly that most, if not all, the mare ridges included were formed after the solidification of the flows. Few color boundaries exist in the area of metric photography where the illumination angle is low enough to show the fronts of some of the very thin flows. However, patches of redder material lying northeast of Mt. Lahire are found to be enclosed by low flow fronts, confirming the theory that the redder material represents an earlier filling of the Imbrium basin.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 2 p
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  • 95
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    The cinder field of the Taurus Mountains, part I (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A dark-colored mare unit within the southwestern corner of the Taurus Mountains is discussed. The geologic characteristics of this unit, the intricate relationship between it and the surrounding features, and the probable source of the unit were the objects of visual observations during the Apollo 15 flight. The results of these observations made from orbit indicate that the unit probably consists of volcanic ash or pyroclastic deposits that came to the surface through a multitude of cinder cones. The local setting of the area and the relationship of the dark deposit to other nearby geologic units are examined in light of data obtained from the Apollo 15 panoramic camera photographs.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 6 p
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  • 96
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    Photogrammetry of Apollo 15 photography, part C (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: In the Apollo 15 mission, a mapping camera system and a 61 cm optical bar, high resolution panoramic camera, as well as a laser altimeter were used. The panoramic camera is described, having several distortion sources, such as cylindrical shape of the negative film surface, the scanning action of the lens, the image motion compensator, and the spacecraft motion. Film products were processed on a specifically designed analytical plotter.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 12 p
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  • 97
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    Bistatic-radar investigation (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: A bistatic-radar study during the Apollo 15 flight is reviewed, with the orbiting command module as one terminal. Bistatic-radar slopes are compared to geological maps of Copernicus and Riphaeus mountain regions and Kepler region. Basic theory is discussed, including the radar echoes composed of the sum of the reflections from the moon area that is mutually visible from the spacecraft and earth. A signal receiving system and data processing system are outlined schematically.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spacecraft Center Apollo 15 Prelim. Sci. Rept.; 10 p
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  • 98
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    X-ray fluorescence experiment (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The preliminary results from the Sco X-1 and Cyg X-1 obtained from the Apollo 15 X-ray detector data are presented along with preliminary results of the X-ray fluorescence spectrometric data of the lunar surface composition. The production of the characteristic X-rays following the interaction of solar X-rays with the lunar surface is described along with the X-ray spectrometer. Preliminary analyses of the astronomical X-ray observation and the X-ray fluorescence data are presented.
    Keywords: SPACE SCIENCES
    Type: Apollo 15 Prelim. Sci. Rept.; 17 p
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  • 99
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    Solar-wind composition experiment (1972)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The Apollo program techniques for studying elemental and isotopic abundances in the solar wind are described. During Apollo 11, 12, 14 and 15 missions, aluminum foils were deployed on the lunar surface as targets for collecting solar wind ions. The foils were returned to earth, and the implanted solar wind particles were analyzed. The preliminary results showing the helium and neon concentrations are presented.
    Keywords: SPACE SCIENCES
    Type: NASA. Manned Spaceflight Center Apollo 15 Prelim. Sci. Rept.; 7 p
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  • 100
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    Low-g simulation testing of propellant systems using neutral buoyancy (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A two liquid, neutral buoyancy technique is being used to simulate propellant behavior in a weightless environment. By equalizing the density of two immiscible liquids within a container (propellant tank), the effect of gravity at the liquid interface is balanced. Therefore the surface-tension forces dominate to control the liquid/liquid system configuration in a fashion analogous to a liquid/gas system in a zero gravity environment.
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: NASA. Goddard Space Flight Center Space Simulation; p 337-348
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