Level-1 Calibration Assessment of Spire's LEMUR-2 GNSS-R Ocean Normalized Bistatic Radar Cross Section Estimates

被引：7

作者：

Al-Khaldi, Mohammad M. ^{[1
,2
]}

Gleason, Scott ^{[3
]}

Linnabary, Ryan ^{[4
]}

Policelli, Frederick S. ^{[5
]}

机构：

[1] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA

[2] Ohio State Univ, Electrosci Lab, Columbus, OH 43210 USA

[3] Univ Corp Atmospher Res UCAR, Constellat Observing Syst Meteorol Ionosphere & C, Boulder, CO 80301 USA

[4] UCAR, Constellat Observing Syst Meteorol Ionosphere & C, Boulder, CO 80301 USA

[5] NASA Goddard Space Flight Ctr, Hydrol Sci Lab, Greenbelt, MD 20771 USA

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2023年 / 20卷

关键词：

Wind speed; Sea surface; Calibration; Global navigation satellite system; Sea measurements; Transmitters; Global Positioning System; Bistatic radar systems; CubeSats; Global Navigation Satellite Systems Reflectometry (GNSS-R); rough surface scattering; SmallSats; SCATTERING; SIGNALS;

D O I：

10.1109/LGRS.2023.3249405

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

An assessment of the ocean surface Level-1 normalized bistatic radar cross section (BRCS) products provided by the two batch 1 LEMUR-2 Global Navigation Satellite Systems Reflectometry (GNSS-R) receivers of Spire, Inc. is reported. The analysis uses datasets extending from DOY 345, 2020 to DOY 329, 2021. Initial assessments indicate a highly consistent overall interchannel response with mean normalized bistatic radar cross section (NBRCS) differences estimated to be at the 1.00% level over a 7-12-m/s European Centre for Medium-Range Weather Forecasts (ECMWF) reference wind speed range. Efforts to validate the observation systems' aggregate response relative to asymptotic to 3 million colocated Cyclone Global Navigation Satellite System (CYGNSS) measurements suggest a highly complementary behavior with an overall NBRCS correlation of 79.03% highlighting the potential utility of LEMUR-2 measurements for ocean surface wind sensing and related applications. Nonphysical NBRCS dependencies on various Level-1 calibration variables, also observed with GNSS-R previous systems, are nonetheless noted and are explored in detail.

引用

页数：5

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