End-to-end design consideration of a radar altimeter for terrain-aided navigation

Chun, Joohwan; Choi, Sung-Mo; Paek, Inchan; Park, Dongmin; Yoo, Kyungju

doi:10.1117/12.2029213

Cited by 2 publications

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“…The measured terrain elevation of the vehicle at any point equals the vehicle's altitude by the barometer minus the vehicle's height over the ground by the radar altimeter . Hence, the accuracy of the measured terrain elevation depends on those of the barometer and the radar altimeter simultaneously . Temperature, the local sea level, and other factors will influence the barometer's accuracy.…”

Section: Tan Systemmentioning

confidence: 99%

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Impact of terrain factors on the matching performance of terrain‐aided navigation

2019

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Aiming at describing terrain variation in an easily understandable way, a new method is proposed to describe the terrain elevations quantitatively by factor analysis for terrain‐aided navigation. After as many terrain factors as possible are collected describing the terrain elevations from various aspects, they are simplified by correlation to remove the redundant factors. The simplified terrain factors are processed to derive the extracted factors by principal component analysis. With such factor analysis, three extracted factors dubbed “variation,” “similarity,” and “information” are derived in the conceptual level. A classifier is derived by logistic regression using the extracted factors. The percentages of the correct classification are very high both for the suitable and the unsuitable regions of matching in two maps, which proves the effectiveness of the extracted factors for the terrain elevations.

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Section: Tan Systemmentioning

confidence: 99%

“…29 Hence, the accuracy of the measured terrain elevation depends on those of the barometer and the radar altimeter simultaneously. 30 Temperature, the local sea level, and other factors will influence the barometer's accuracy. The radar altimeter's accuracy is dependent on frequency, height, ground cover, etc.…”

Section: Tan Systemmentioning

confidence: 99%

Impact of terrain factors on the matching performance of terrain‐aided navigation

2019

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“…To overcome this difficulty, one may use the nadir-looking synthetic aperture radar (SAR) technique to reduce the along-track beam width [1], [2], while the cross-track ambiguity is resolved with the interferometry technique [3], [4], [8]. However, the cross-track resolution is still far from satisfactory, because of the limitation in the number of antennas.…”

Section: Introductionmentioning

confidence: 99%

A Switched-Antenna Nadir-Looking Interferometric SAR Altimeter for Terrain-Aided Navigation

Paek

Jang

Chun

et al. 2016

Computer Science &Amp; Information Technology ( CS &Amp; IT )

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End-to-end design consideration of a radar altimeter for terrain-aided navigation

Cited by 2 publications

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Impact of terrain factors on the matching performance of terrain‐aided navigation

Impact of terrain factors on the matching performance of terrain‐aided navigation

A Switched-Antenna Nadir-Looking Interferometric SAR Altimeter for Terrain-Aided Navigation

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