Spatiotemporal Variation of Imaging Swath in Earth Observing Lunar-Based SAR under Orbital Perturbations

We analyzed the spatiotemporal variations of the imaging swath and region using the Lunar-Based Synthetic Aperture Radar (LBSAR) for Earth observation. The ground and slant swaths following the Earth-observing geometry and SAR configurations were formulated. The bounds of the imaging swath were high...

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Vydáno v:IEEE transactions on geoscience and remote sensing Ročník 62; s. 1
Hlavní autoři: Xu, Zhen, Chen, Kun-Shan, Liu, Xiu, Guo, Huadong
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.01.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Antennas
Earth
Imaging
imaging region
Imaging techniques
LBSAR’s altitude
Lunar surface
Lunar-based SAR (LBSAR)
Moon
Radar
SAR (radar)
SAR configurations
Site location
Spatiotemporal phenomena
spatiotemporal swath
Superluminescent diodes
Swaths
Synthetic aperture radar
Variation
ISSN:0196-2892, 1558-0644
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Shrnutí:We analyzed the spatiotemporal variations of the imaging swath and region using the Lunar-Based Synthetic Aperture Radar (LBSAR) for Earth observation. The ground and slant swaths following the Earth-observing geometry and SAR configurations were formulated. The bounds of the imaging swath were highlighted for appropriately configuring the LBSAR. The results suggested that the imaging swath is determined by the coupling of orbit elements, near-look angle, antenna beamwidth, and to some extent by the Earth's ellipsoidal shape and LBSAR's site location on the Moon's surface. The side-looking direction, despite its modest impact on the imaging swath, plays a dominant role in ascertaining LBSAR's imaging region. Further, spatiotemporal variations of ground swath in various epochs were analyzed to emphasize the challenge and importance of characterizing Earth observation capability in the LBSAR.
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ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2023.3348437