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  • Energy Production and Conversion  (4)
  • ELECTRONIC COMPONENTS AND CIRCUITS  (1)
  • 2000-2004  (2)
  • 1990-1994  (3)
  • 1
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    (abstract) Scaling Nominal Solar Cell Impedances for Array Design (1994)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper discusses a task the objective of which is to characterize solar cell array AC impedance and develop scaling rules for impedance characterization of large arrays by testing single solar cells and small arrays. This effort is aimed at formulating a methodology for estimating the AC impedance of the Mars Pathfinder (MPF) cruise and lander solar arrays based upon testing single cells and small solar cell arrays and to create a basis for design of a single shunt limiter for MPF power control of flight solar arrays having very different inpedances.
    Keywords: Energy Production and Conversion
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Scaling Nominal Solar Cell Impedances for Array Design (1994)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: A methodology for estimating the AC impedance of solar arrays and in particular the Mars Pathfinder (MPF) cruise and lander solar arrays is presented.
    Keywords: Energy Production and Conversion
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    NASA TECHNICAL REPORTS
  • 3
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    Balloon and Lear Jet Testing of Scarlet Modules and Cells (2004)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: This paper presents test results from SCARLET (Solar Concentrator Array with Refractive Linear Element Technology) experiments performed on several Lewis Research Center Lear jet flights and two JPL balloon flights. The tests were performed in support of the BMDO sponsored SCARLET II program, which is building a 2.6 kW SCARLET solar array to supply the primary power for the JPL New Millennium Deep Space 1 Mission. The experiments involve TECSTAR dual junction GaInP2/GaAs/Ge cells flown bare and under two different types of SCARLET lenses. The two types of lenses tested were a developmental design consisting of monolithic THV fluoroplastic and the current baseline flight design consisting of ceria-doped microsheet and silicone. Measured lens and total module efficiencies are presented and the flight data is compared to various solar simulator test results.
    Keywords: Energy Production and Conversion
    Type: Proceedings of the 15th Space Photovoltaic Research and Technology Conference; 177-189; NASA/CP-2004-212735
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    The Performance of Advanced III-V Solar Cells (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Test results show triple junction solar cells with efficiencies as high as 27% at 28C and 136.7 mw/sq cm. Triple junction cells also achieve up to 27.5% at -120 C and 5 mw/sq cm, conditions applicable to missions to Jupiter. Some triple junction cells show practically no degradation as a result of Low Intensity Low Temperature (LILT) effects, while others show some; this degradation can be overcome with minor changes to the cell design.
    Keywords: Energy Production and Conversion
    Type: 29th IEEE Photovoltaic Specialists Conference; May 19, 2002 - May 24, 2002; New Orleans, LA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Wideband Linear Phase Modulator (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Phase modulator for transmission in X band provides large phase deviation that remains nearly linear with voltage over relatively wide range. Operates with low loss over wide frequency band and with stable characteristics over wide temperature range. Phase modulator contains two varactor-diode phase shifters coupled via circulators. Separate drive circuit applies modulating voltages to varactor diodes. Modulation voltages vary in accordance with input to drive circuit.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-18602 , NASA Tech Briefs (ISSN 0145-319X); 18; 4; P. 44
    Format: text
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    NASA TECHNICAL REPORTS
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