Paper Info
Title
A Radiometrically Precise Multi-Frequency Ice-Penetrating Radar Architecture
Abstract
Ice-penetrating radar sounders are powerful geophysical tools for studying the englacial and subglacial conditions of Earth's ice sheets. Data from these instruments is critical to enhancing understanding and modeling of ice-sheet dynamics and ice-sheet contributions to global sea level. Traditionally, ice-penetrating radar sounders have a single center frequency creating inherent ambiguity in their pulse-by-pulse received power due to the confounding effects of basal material and roughness. Interpreting ice-penetrating radar data in light of these ambiguities requires assumptions about the physical state of the ice sheet, large-scale empirical analyses, or ancillary data. Here, we demonstrate that a high radiometric fidelity, narrowband, multi-frequency radar sounder can overcome these issues by separating the frequency-dependent basal roughness signature from the frequency-independent basal material signature. We present a radar system architecture with three narrow frequency bands spaced orders of magnitude apart (center frequencies of 1, 10, and 100 MHz, each with 20% fractional bandwidth) and high radiometric resolution (+/- 0.5 dB). This architecture will allow us to precisely constrain ice-sheet basal conditions on a pulse-by-pulse basis by disambiguating the effects of basal material and basal roughness in ice-penetrating radar data.
Year
DOI
Venue
2022
10.1109/TGRS.2021.3099801
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Keywords
DocType
Volume
Radar, Attenuation, Ice, Spaceborne radar, Radar imaging, Radar remote sensing, Radiometry, Ice-penetrating radar, radar remote sensing, radar sounding, radiometric resolution
Journal
60
ISSN
Citations 
PageRank 
0196-2892
0
0.34
References 
Authors
0
2
Name
Order
Citations
PageRank
Anna L. Broome100.68
Dustin M. Schroeder223.82