Disclaimer: This material is being kept online for historical purposes. Though accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers. Visit https://espo.nasa.gov for information about our current projects.


tivecommons.org/licenses/by/4.0/). Roy M. Huffington Department of Earth...

Xu, Y., Z. Lu, and Kim (2021), tivecommons.org/licenses/by/4.0/). Roy M. Huffington Department of Earth Sciences, Southern Methodist University, Dallas, TX 75205, USA; zhonglu@smu.edu (Z.L.); jinwook@smu.edu (J.-W.K.) * Correspondence: yuankunx@smu.edu, Preliminary Results. Remote Sens., 13, 4575, doi:10.3390/rs13224575.

Decorrelation of X, C, and L-band InSAR (Interferometric Synthetic Aperture Radar) over densely vegetated regions is a common obstacle for detecting ground deformation beneath forest canopies. Using long-wavelength P-band SAR sensors (wavelength of 69.72 cm), which can penetrate through dense forests and collect relatively consistent signals from ground surface, is one potential solution. Here, we experimented using the NASA JPL (Jet Propulsion Laboratory)’s P-band AirMOSS (Airborne Microwave Observatory of Subcanopy and Subsurface) radar system to collect repeat-pass P-band SAR data over densely vegetated regions in Oregon and California (USA), and generated by far the first P-band InSAR results to test the capability of P-band InSAR for geohazard detection over forested terrains. Our results show that the AirMOSS P-band InSAR could retain coherence two times as high as the L-band satellite ALOS-2 (Advanced Land Observing Satellite-2) data, and was significantly more effective in discovering localized geohazards that were unseen by the ALOS-2 interferograms over densely vegetated areas. Our results suggest that the airborne Pband InSAR could be a revolutionary tool for studying geohazards under dense forest canopies.

PDF of Publication: 
Download from publisher's website.
Funding Sources: 
NASA Earth Surface and Interior Focus Area (80NSSC19K1317), NASA-ISRO SAR (NISAR) Science Team (80NSSC19K1491), NASA Interdisciplinary Research (IDS) in the Earth Science Program (80NSSC17K0022)