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Experimental Evaluation of GNSS-Based Frequency Synchronization for SAR Applications

Rodrigues Silva Filho, Eduardo and Rodriguez Cassola, Marc (2022) Experimental Evaluation of GNSS-Based Frequency Synchronization for SAR Applications. In: International Geoscience and Remote Sensing Symposium (IGARSS). IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2022-07-17 - 2022-07-22, Kuala Lumpur, Malaysia. doi: 10.1109/IGARSS46834.2022.9883501.

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Abstract

Phase synchronization is a crucial requirement for bistatic and multistatic SAR missions. One possible solution for this problem could be to use the same master oscillator for the radar payload and the GNSS receiver, which could allow the recovery of the oscillator phase noise from the carrier phase measurements. This solution would be cost-effective and straightforward, but its effectiveness depends on whether the GNSS receiver would maintain the spectral purity of the master oscillator internally. We executed zero and short baseline experiments to evaluate this technique with a commercial receiver. Despite some unexpected signatures on the carrier phase single-difference measurements, we achieved frequency synchronization of less than 10 ppm and phase synchronization of less than one degree at the L1 carrier frequency after applying a moving average filter of one second at a 10 Hz sampling rate. The results suggest the feasibility of the GNSS-based phase synchronization concept, but further experiments are necessary to evaluate it thoroughly.

Item URL in elib:https://elib.dlr.de/186490/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Evaluation of GNSS-Based Frequency Synchronization for SAR Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rodrigues Silva Filho, EduardoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodriguez Cassola, MarcUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:2022
Journal or Publication Title:International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.1109/IGARSS46834.2022.9883501
Status:Published
Keywords:Bistatic radar, multistatic radar, frequency synchronization, phase synchronization, GNSS
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Kuala Lumpur, Malaysia
Event Type:international Conference
Event Dates:2022-07-17 - 2022-07-22
Organizer:IEEE GRSS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - SAR missions, R - Polarimetric SAR Interferometry HR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Rodrigues Silva Filho, Eduardo
Deposited On:09 Jun 2022 07:17
Last Modified:01 Aug 2023 14:37

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