Results 51 to 60 of about 82,109 (188)
Orbit to orbit transportation [PDF]
, 1980 Orbital transfer vehicle propulsion options for SPS include both chemical (COTV) and electrical (EOTV) options. The proposed EOTV construction method is similar to that of the SPS and, by the addition of a transmitting antenna, may serve as a ...
Bergeron, R. P.
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Remote SensingHigh-precision Low Earth Orbit (LEO) satellite clocks are essential for LEO-augmented Positioning, Navigation, and Timing (PNT) services. Nowadays, high-precision LEO satellite clocks can be determined in real-time using a Kalman filter either onboard or
Meifang Wu +8 more
doaj +1 more source
Remote Sensing, 2019 Cycle slip detection and repair are crucial for precise GPS-derived orbit determination of the low-Earth orbit (LEO) satellites. We present a new approach to detect and repair cycle slips for dual-frequency LEO satellite GPS observations.
Hui Wei +3 more
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Additional application of the NASCAP code. Volume 1: NASCAP extension [PDF]
The NASCAP computer program comprehensively analyzes problems of spacecraft charging. Using a fully three dimensional approach, it can accurately predict spacecraft potentials under a variety of conditions.
Cassidy, J. J. +6 more
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The NaK Population: A 2019 Status [PDF]
The statistical debris measurement campaigns conducted by the Haystack Ultrawideband Satellite Imaging Radar (HUSIR) on behalf of the NASA Orbital Debris Program Office are used to characterize the long-term behavior of the small, low Earth orbit (LEO ...
Anz-Meador, Phillip +4 more
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Inter-plane satellite matching in dense LEO constellations
, 2019 Dense constellations of Low Earth Orbit (LEO) small satellites are envisioned to make extensive use of the inter-satellite link (ISL). Within the same orbital plane, the inter-satellite distances are preserved and the links are rather stable. In contrast,
Leyva-Mayorga, Israel +2 more
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Overview of battery usage in NASA/GSFC LEO and GEO missions [PDF]
In July, 1989, Cosmic Background Explorer (COBE) will be launched from a Delta rocket to study the big bang theory. The COBE, which is in a LEO/Polar orbit, will have two 20 Ah NiCd batteries, and 18 cells per battery, made by McDonnell Douglas Company ...
Yi, Thomas
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EUV Irradiance Inputs to Thermospheric Density Models: Open Issues and Path Forward
, 2018 One of the objectives of the NASA LWS Institute on Nowcasting of Atmospheric Drag for LEO Spacecraft was to investigate whether and how to increase the accuracy of atmospheric drag models by improving the quality of the solar forcing inputs, namely ...
Bruinsma, S., Vourlidas, A.
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Research on Architecture of LEO Satellite Internet of Things and Key Technologies
天地一体化信息网络, 2021 First, we analyzed the composition and demand characteristics of LEO satellite IoTs, and designed an architecture of LEO satellite IoTs.Second, to extracted characteristics of electromagnetic environment and channel, we studied electromagnetic ...
Xiaojin DING +4 more
doaj +2 more sources
SPS construction perspective. Summary [PDF]
, 1980 Projections concerning the general construction requirements for a solar power satellite (SPS) are summarized. It is recognized that the ability to construct an SPS must be developed through an evolutionary process.
Benson, H.
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