Assessment of Hongtu-1 Multi-Static X-Band SAR Constellation Interferometry

被引：3

作者：

Wegmueller, Urs ^{[1
]}

Magnard, Christophe ^{[1
]}

Frey, Othmar ^{[1
,2
]}

机构：

[1] Gamma Remote Sensing AG, Worbstr 225, CH-3073 Gumlingen, Switzerland

[2] Swiss Fed Inst Technol, Laura Hezner Weg 7,HIF D12-1, CH-8093 Zurich, Switzerland

来源：

REMOTE SENSING | 2024年 / 16卷 / 19期

关键词：

Hongtu-1; HT1; PIESAT; SAR constellation; interferometry; cartwheel; bistatic; multi-static; DEM generation; height changes; single-pass coherence; multi-static coherence product; SATELLITE RADAR INTERFEROMETRY; ICE-SHEET MOTION; MISSION;

D O I：

10.3390/rs16193600

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In 2023, the Chinese company PIESAT launched the multi-static X-band SAR constellation Hongtu-1 (HT1). HT1 consists of the active monostatic SAR sensor HT1-A and the three additional passive SAR receivers HT1-B, HT1-C and HT1-D. The passive sensors are arranged as a cartwheel in a circle around the active sensor. For our SAR interferometric investigation, we were able to use a multi-static HT1 recording. After a brief introduction of HT1, we describe the processing performed. Based on the phases of the six single-pass interferometric pairs, we calculated height differences relative to the Copernicus DEM. Larger deviations were observed mainly for mining areas and for forest areas. Thanks to the simultaneous acquisition of the interferometric pairs, the high spatial resolution and the good signal quality, the necessary processing was relatively easy to perform. Besides the interferometric phase, we also investigated possible applications of multi-static coherence. Forest can be recognized by its reduced single-pass coherence values. Based on our results, we expect that the multi-static HT1 coherence and its dependence on the interferometric baseline can be used to estimate parameters such as forest biomass.

引用

页数：15