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Impacts of Ionospheric Scintillation on the BIOMASS P-Band Satellite SAR

Rogers, Neil and Quegan, Shaun and Kim, Jun Su and Papathanassiou, Kostas (2014) Impacts of Ionospheric Scintillation on the BIOMASS P-Band Satellite SAR. IEEE Transactions on Geoscience and Remote Sensing, 52 (3), pp. 1856-1868. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2013.2255880. ISSN 0196-2892.

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Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6530660&tag=1


The European Space Agency is conducting studies for a low-earth orbiting polarimetric synthetic aperture radar called BIOMASS to provide global measurements of forest biomass and tree height. Phase scintillation across the synthetic aperture caused by ionospheric irregularities can degrade the impulse response function (IRF) and cause squinting, and its temporal variation can cause decorrelation in repeat-pass interferometry. These effects are simulated for a range of conditions for the baseline BIOMASS system configuration using the Wideband model of scintillation, which predicts that for a dawn-dusk orbit, impacts of scintillation over forest regions are negligible under all conditions except at high latitudes in the North American sector under high sunspot activity. In this sector, single-look IRFs have mean integrated sidelobe ratios (ISLRs) and peak sidelobe ratios (PSLRs) better than 0 and -5 dB, respectively, at 90% confidence interval under median solar activity up to the northern tree line ( ~ 70° geomagnetic). Degradation in the mean 3-dB resolution of up to 10% is predicted, with mean absolute azimuth shifts of the IRF peak of up to 2 m, which increases to 5 m at high sunspot number. Similar values are found for the dawn and dusk sides, and seasonal variations are negligible for latitudes below the tree line. Repeat-pass interferometric image pairs maintain coherence up to 50 ° N under median sunspot conditions. Four-look processing improves the ISLR and PSLR by several decibels, but causes significant degradation of the 3-dB resolution due to incoherent averaging of images with different random azimuth shifts.

Item URL in elib:https://elib.dlr.de/99789/
Document Type:Article
Title:Impacts of Ionospheric Scintillation on the BIOMASS P-Band Satellite SAR
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rogers, NeilUniversity of SheffieldUNSPECIFIEDUNSPECIFIED
Quegan, ShaunUniversity of SheffieldUNSPECIFIEDUNSPECIFIED
Date:March 2014
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1856-1868
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Ionosphere, radio propagation, spaceborne radar, synthetic aperture radar (SAR)
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 - Vorhaben Multi-dimensionale SAR-Auswertung (old), R - Vorhaben Tandem-L Vorstudien (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Kim, Junsu
Deposited On:26 Nov 2015 15:37
Last Modified:31 Jul 2019 19:56

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