Sentinel-1 azimuth subbanding for multiple aperture interferometry - Test case over the Roi Baudoin ice shelf, east Antartica

• Published in: 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS
• Main Authors: Kirkove, Murielle, Glaude, Quentin, De Rauw, Dominique, Barbier, Christian, Pattyn, Franck, Orban, Anne
• Format: Conference Object
• Language: English
• Published: 2021
• Subjects: Multiple Aperture Interferometry; Split-band; Sentinel-1; Ice Shelf; Physical; chemical; mathematical & earth Sciences; Earth sciences & physical geography; Physique; chimie; mathématiques & sciences de la terre; Sciences de la terre & géographie physique; East Antarctica; Roi Baudouin; The Sentinel; Antarc*; Antarctica; antartic*
• Online Access: https://orbi.uliege.be/handle/2268/262217; https://orbi.uliege.be/bitstream/2268/262217/1/Manuscript_IGARSS2021_MK.pdf; https://doi.org/10.1109/IGARSS47720.2021.9553522

peer reviewed As an extension of Synthetic Aperture Radar Interferom- etry, Multiple Aperture Interferometry (MAI) is a spectral diversity technique that allows the determination of azimuth displace- ments from phase shift measurements. This is made possi- ble through the creation of backward- and forward-looking Single-Look-Complex (SLC) data. Then, the phase differ- ence between the backward and forward-looking interfero- gram is translated into a displacement. Using SLC data, MAI requires a proper azimuth splitband operator. Different tech- niques exist to split the azimuth band, but they are often too briefly described in the MAI literature. In this conference pa- per, we analyze the signal properties of the Sentinel-1 TOPS acquisition mode and define an azimuth subbanding proto- col. In particular, we look at the role of de-apodization and apodization in the band filtering operation. We focus our anal- ysis on Sentinel-1 data in Interferometric Wideswath mode over the Roi Baudouin Ice Shelf, East Antarctica. MIMO (Monitoring melt where Ice Meets Ocean); SMAIAD (Sentinel-1 Multiple Aperture Interferometry for Azimuth Displacement Retrieval)