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  • Other Sources  (12)
  • 1
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    Unknown
    In:  CASI
    Publication Date: 2016-06-07
    Description: The major components of a solar electric propulsion system are discussed and some problems in low thrust mission analysis are detailed. Emphasis is placed on the development of a nominal low thrust trajectory and guidance and navigation aspects.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Flight Mech.(Estimation Theory Symp.; p 73-77
    Format: application/pdf
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  • 2
    Publication Date: 2019-06-28
    Description: Intercomparisons of sea surface temperature (SST) products derived from the operational NOAA-7 AVHRR-II algorithm and in situ observations are made. The 1982 data sets consist of ship survey data during the winter from the Mid-Atlantic Bight (MAB), ship and buoy measurements during April and September in the Gulf of Mexico and shipboard observations during April off the N.W. Spanish coast. The analyses included single pixel comparisons and the warmest pixel technique for 2 x 2 pixel and 10 x 10 pixel areas. The reason for using multi-pixel areas was for avoiding cloud contaminated pixels in the vicinity of the field measurements. Care must be taken when applying the warmest pixel technique near oceanic fronts. The Gulf of Mexico results clearly indicate a persistent degradation in algorithm accuracy due to El Chichon aerosols. The MAB and Spanish data sets indicate that very accurate estimates can be achieved if care is taken to avoid clouds and oceanic fronts.
    Keywords: OCEANOGRAPHY
    Type: NASA-TM-85100 , NAS 1.15:85100
    Format: application/pdf
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  • 3
    Publication Date: 2019-06-28
    Description: The Kalman filter is a data-processing algorithm with a distinguished history in systems theory. Its application to oceanographic problems is in the embryo stage. The behavior of the filter is demonstrated in the context of an internal equatorial Rossby wave propagation problem.
    Keywords: OCEANOGRAPHY
    Type: NASA-TM-83993 , NAS 1.15:83993
    Format: application/pdf
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  • 4
    Publication Date: 2019-06-27
    Description: The use of solar energy to stretch our supplies of fossil fuels was investigated. Project SAGE (semi-automated ground environment) addresses itself to one application of this goal, solar assistance in central water heating systems for multifamily projects. Public policy issues that affect the rate of adoption of solar energy systems were investigated and policy actions were offered to accelerate the adoption of SAGE and other solar energy systems.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-155945 , JPL-PUB-77-47
    Format: application/pdf
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  • 5
    Publication Date: 2019-06-27
    Description: A summary of the results of a survey of potential applications of solar energy for supplying process heat requirements in the industrial, agricultural, and commercial sectors of California is presented. Technical, economic, and institutional characteristics of the three sectors are examined. Specific applications for solar energy are then discussed. Finally, implications for California energy policy are discussed along with recommendations for possible actions by the State of California.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157169 , JPL-PUB-78-33
    Format: application/pdf
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  • 6
    Publication Date: 2019-06-27
    Description: Utilization requirements are given and comparisons made of two phase III SAGE (solar assisted gas energy) installations in California: (1) a retrofit installation in an existing apartment building in El Toro, and (2) an installation in a new apartment building in Upland. Such testing in the field revealed the requirements to be met if SAGE-type installations are to become commercially practical on a widespread basis in electric and gas energy usage.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-155948 , JPL-PUB-77-49
    Format: application/pdf
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  • 7
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    Unknown
    In:  Other Sources
    Publication Date: 2019-06-28
    Description: Findings of study of potential use for solar energy utilization by California dairy industry, prove that applicable solar energy system furnish much of heat needed for milk processing with large savings in expenditures for oil and gas and ensurance of adequate readily available sources of process heat.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-14498 , NASA Tech Briefs (ISSN 0145-319X); 4; 1; P. 62
    Format: text
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  • 8
    Publication Date: 2019-07-13
    Description: Two major aspects of the workshop are presented: (1) presentations on the Photovoltaic program and the National Solar Heating and Cooling Demonstration program, and (2) discussions on the issues pertinent to the Residential Application program.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-163274 , JPL-PUB-80-22 , Feb 12, 1980 - Feb 13, 1980; Pasadena, CA; United States
    Format: application/pdf
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  • 9
    Publication Date: 2019-06-27
    Description: An algorithm was developed to solve the following problem: given the characteristics of the engine to be used to make a finite burn maneuver and given the desired orbit, when must the engine be ignited and what must be the orientation of the thrust vector so as to obtain the desired orbit? The desired orbit is characterized by classical elements and functions of these elements whereas the control parameters are characterized by the time to initiate the maneuver and three direction cosines which locate the thrust vector. The algorithm was built with a Monte Carlo capability whereby samples are taken from the distribution of errors associated with the estimate of the state and from the distribution of errors associated with the engine to be used to make the maneuver.
    Keywords: SPACE SCIENCES
    Type: NASA-TM-X-66180 , X-551-73-6
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  • 10
    Publication Date: 2019-06-27
    Description: Relative motion analysis for two satellites of oblate planet
    Keywords: SPACE SCIENCES
    Type: NASA-TM-X-65329 , X-551-70-313
    Format: application/pdf
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