Polarimetric analysis of long term paddy rice observation using ground-based SAR (GB-SAR) system

[ABSTRACT]The synthetic aperture radar (SAR) has been utilized for generating image of the earth surface by synthesizing the antenna along the azimuth flight pass as signal processing. This technique recently provides us abundant information by using the polarimetric data of linear polarized (LP) antennas. In recently, Josaphat Microwave Remote Sensing Laboratory (JMRSL) developed ground-based SAR (GB-SAR) for precise monitoring of several targets and SAR experiment inside an anechoic chamber. In this paper, we introduce the paddy rice observation by using the developed GB-SAR system and that of polarimetric analysis. To observe the paddy rice using SAR is very promising since SAR observation doesn’t face the problem of whether condition. We conducted the paddy rice observation experiment inside an JMRSL anechoic chamber. More accurate results can be corrected than SAR onboard satellite by testing inside the anechoic chamber and using the GB-SAR with wideband frequency. The GB-SAR is comprised of vector network analyzer (VNA), quad ridged horn antennas, and position controller. The SAR image was reconstructed by back projection algorithm with inverse SAR (ISAR) experimental method for high resolution image. We have observed the paddy rice from beginning of the June until end of September to analysis according to the growth stages. As a polarimetric analysis, we applied model based decomposition technique in linear polarization (LP) basis proposed by Yamaguchi to each SAR images. The result from series of measurements show strong dependency on the off-nadir angle and unignorable high helix scattering effect.

https://opac.ll.chiba-u.jp/da/curator/107867/

https://opac.ll.chiba-u.jp/da/curator/107867/ceresIntlSympo-24-P417.pdf

Chiba University. Center for Environmental Remote Sensing

千葉大学環境リモートセンシング研究センター

会議発表用資料

Proceedings of the CEReS international symposium = CEReS国際シンポジウム資料集

24

417

422

2016-11-21

publisher

環境リモートセンシング研究センター「CEReSシンポジウム資料集」