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  • 1
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    Remote profiling of lake ice using an S-band short-pulse radar aboard an all-terrain vehicle (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A short-pulse (one nanosecond) S-band radar system was developed to supplement the information obtained with the aid of the SLAR system of the Great Lakes ice information system. It is the objective of the ice information system to aid in extending the winter navigation season. The SLAR imagery cannot be interpreted directly to obtain information concerning the thickness of the ice. This information is to be provided by a remote ice measuring system utilizing nanosecond radar pulses. A description is given of investigations in which such a system was installed on a C-47 aircraft. In other studies reported an S-band short-pulse radar was mounted on an all-terrain vehicle.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Radio Science; 11; Apr. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Second Order Angle of Incidence Corrections for GaAs /Ge Solar cells with Low Absorptance Coverglass (1995)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: The objective of this paper was to determine any angle of incidence effects beyond the cosine and Fresnel reflection corrections. Two samples each of several GaAs /Ge cell assemblies were measured at incidence angles from 0 to 85o to provide a survey for possible second order corrections that would have to be applied to solar arrays with non-normal incident light.
    Keywords: Energy Production and Conversion
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    All-weather ice information system (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Heart of system consists of two major components: side-looking airborne radar system for detecting ice cover and type, and modified short pulse S-band radar system for simultaneously determining ice cover regardless of cloud cover.
    Keywords: ELECTRONIC SYSTEMS
    Type: LEW-12638 , NASA Tech Briefs (ISSN 0145-319X); 1; 1; P. 25
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Pressure tube instrumentation (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Set of standards in the form of drawings provides detailed information about materials fastening techniques, surface finishes, critical dimensions, quality control specifications, and installation methods for variety of static and total pressure tube instrumentation.
    Keywords: MECHANICS
    Type: LEW-12539 , NASA Tech Briefs (ISSN 0145-319X); 1; 1; P. 108
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Method for forming a solar array strip (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A flexible solar array strip is formed by a method which lends itself to automatic production techniques. Solder pads are deposited on printed circuitry deposited on a flexible structure. The resultant substrate is stored on a drum from which it is withdrawn and incrementally advanced along a linear path. Solderless solar cells are serially transported into engagement with the pads which are then heated in order to attach the cells to the circuitry. Excess flux is cleaned from the cells which are encapsulated in a protective coating. The resultant array is then spirally wound on a drum.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Automated solar-cell-array assembly machine (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Continuous-feeding machine automatically bonds solar cells to printed-circuit substrate. In completed machine, cells move to test station where electrical characteristics could be checked. If performance of cell is below specifications, that cell is marked and removed. All machine functions are synchronized by electronics located within unit. It may help to lower costs in future solar-cell production.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-13652 , NASA Tech Briefs (ISSN 0145-319X); 3; 2; P. 206
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Propagation along azimuthally magnetized ferrite-loaded circular waveguides (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The paper describes the modal dispersion characteristics of electromagnetic waves traveling along the azimuthally magnetized ferrite-loaded coaxial transmission line and the ferrite-loaded wire. The modal dispersion curves are used to determine the pass and stop bands of normal propagation. Boundary-value problems were solved with Bolle-Heller functions. The dispersion characteristics of transverse electric modes are presented as plots of the normalized propagation constant vs the normalized frequency.
    Keywords: COMMUNICATIONS AND RADAR
    Type: Journal of Applied Physics; 48; June 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Soil moisture detection from radar imagery of the Phoenix, Arizona test site (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The Environmental Research Institute of Michigan (ERIM) dual-polarization X and L band radar was flown to acquire radar imagery over the Phoenix (Arizona) test site. The site was covered by a north-south pass and an east-west pass. Radar response to soil moisture was investigated. Since the ERIM radar does not have accurately measured antenna patterns, analysis of the L band data was performed separately for each of several strips along the flight line, each corresponding to a narrow angle of incidence. For the NS pass, good correlation between the radar return and mositure content was observed for each of the two nearest (to nadir) angular ranges. At higher angular ranges, no correlation was observed. The above procedure was not applied to the EW pass due to flight path misalignments. The results obtained stress the importance of radar calibration, the digitization process, and the angle of incidence.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-144638 , RSL-TR-264-4
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Measurement of lake ice thickness with a short-pulse radar system (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Measurements of lake ice thickness were made during March 1975 at the Straits of Mackinac by using a short-pulse radar system aboard an all-terrain vehicle. These measurements were compared with ice thicknesses determined with an auger. Over 25 sites were explored which had ice thicknesses in the range 29 to 60 cm. The maximum difference between radar and auger measurements was less than 9.8 percent. The magnitude of the error was less than + or - 3.5 cm. The NASA operating short-pulse radar system used in monitoring lake ice thickness from an aircraft is also described.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TN-D-8189 , E-8573
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Solar array strip and a method for forming the same (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A flexible solar array strip is formed by providing printed circuitry between flexible layers of a nonconductive material, depositing solder pads on the printed circuitry, and storing the resulting substrate on a drum from which it is then withdrawn and advanced along a linear path. Solderless solar cells are serially transported into engagement with the pads and are infrared radiation to melt the solder and attach the cells to the circuitry. Excess flux is cleaned from the solar cells which are then encapsulated in a protective coating. The resulting array is then wound on a drum.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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