@inproceedings{c3ae55deb5914756aad98f728a92b9cd,
title = "Spaceborne GNSS-R Signal Coherence Dependence on Elevation Angles Over Sea Ice and Ice Sheets in Greenland and Antarctica",
abstract = "This paper presents a quantitative analysis of spaceborne GNSS-R signal coherence dependence on satellite elevation angles at specular reflection points over sea ice and ice sheets in Greenland and Antarctica using TechDemoSat-1 delay Doppler maps. Over sea ice and ice sheets, the probability of coherent reflections is high at low elevation angles and decreases with increasing elevation angles, as expected. For sea ice, the coherence rate is 96\% at elevation angles of 20-43\{circ\}, then drops to a minimum of 25\% near nadir. Over the Greenland ice sheet, the maximum coherence rate is 86\% at the elevation angle of 47\{circ\}, and the minimum is 21\% at 73\{circ\}. In Antarctica, the coherence rate reaches a maximum of 90\% at 48\{mathrm\{o\}\} and a minimum of 36\% at 72\{circ\}. The findings provide a quantitative characterization of the GNSS-R coherency over sea ice and ice sheets and are useful for future GNSS-R mission designs.",
keywords = "delay Doppler map, GNSS reflectometry, ice sheet, sea ice, TechDemoSat-1",
author = "Jiahua Zhang and Morton, \{Y. Jade\}",
note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 2022 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2022 ; Conference date: 17-07-2022 Through 22-07-2022",
year = "2022",
doi = "10.1109/IGARSS46834.2022.9884119",
language = "English",
series = "International Geoscience and Remote Sensing Symposium (IGARSS)",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "7131--7134",
booktitle = "IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium",
address = "United States",
}