Resolving Ambiguities in SHARAD Data Analysis Using High-Resolution Digital Terrain Models
Abstract
:1. Introduction
2. SHARAD Data Analysis with MOLA
2.1. SPRATS: A Toolset for Radar Simulation and Processing
2.2. Region of Interest
2.3. Simulations with MOLA DTMs
2.4. Limits of MOLA DTMs for Shallow Subsurface Interpretations
3. Extending the Radar Analysis Further with HRSC DTMs
3.1. HRSC as an Upgrade of MOLA DTMs
3.2. Artifacts on DTMs Due to Photogrammetry
4. CTX as an Optimal DTM for SHARAD Data Interpretation
4.1. CTX Echo Reconstruction on a Rough Surface
4.1.1. Resolution Higher Than the Radar Wavelength for a Quasi-Perfect Reconstruction of the Signal
4.1.2. Impact of the Resolution Reduction on CTX DTMs
4.2. Results in the Terra Cimmeria Region of Interest
4.2.1. Overcoming the Lack of CTX Coverage with Photoclinometry
4.2.2. High Sensitivity to Small-Scale Features for Radar Simulations
4.3. Detection of DTM Errors with Radar Simulation
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Instrument | DTM Resolution (m/Pixel) |
---|---|
MOLA | 463 |
HRSC | 50–100 |
CTX | 12–18 |
HRSC DTM corrected by photoclinometry | 6 |
Instrument | Simultaneous Stereo Pair Acquisition | Convergence Angle (°) | Image Width at Closest Approach (km) |
---|---|---|---|
HRSC | Yes | 37.8 | 52 |
CTX | No | 0–60 | 30 |
Northern Plateau | Southern Plateau | |
---|---|---|
HCPC mean angle (°) | 1.05 | 1.31 |
HCPC angle rms (°) | 3.24 | 4.36 |
HCPC slant range rms (m) | 23.13 | 27.33 |
MOLA mean angle (°) | 1.34 | 4.26 |
MOLA angle rms (°) | 0.1 | 0.6 |
MOLA slant range rms (m) | 20.30 | 26.61 |
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Desage, L.; Herique, A.; Douté, S.; Zine, S.; Kofman, W. Resolving Ambiguities in SHARAD Data Analysis Using High-Resolution Digital Terrain Models. Remote Sens. 2023, 15, 764. https://doi.org/10.3390/rs15030764
Desage L, Herique A, Douté S, Zine S, Kofman W. Resolving Ambiguities in SHARAD Data Analysis Using High-Resolution Digital Terrain Models. Remote Sensing. 2023; 15(3):764. https://doi.org/10.3390/rs15030764
Chicago/Turabian StyleDesage, Léopold, Alain Herique, Sylvain Douté, Sonia Zine, and Wlodek Kofman. 2023. "Resolving Ambiguities in SHARAD Data Analysis Using High-Resolution Digital Terrain Models" Remote Sensing 15, no. 3: 764. https://doi.org/10.3390/rs15030764