Title | Simulated and Observed Backscatter at P-, L-, and C-Bands from Ponderosa Pine Stands |
Publication Type | Journal Article |
Year of Publication | 1993 |
Authors | Wang, Y, Davis, FW, Melack, JM |
Journal | IEEE Transactions on Geoscience & Remote Sensing |
Volume | 31 |
Pagination | 871-879 |
Date Published | 1993 |
Keywords | Electrical & electronic., Radar. Scattering. Model., Reprint available from: Wang Y. UNIV CALIF SANTA BARBARA, CTR REMOTE, SENSING & ENVIRONM OPT, SANTA BARBARA, CA 93106, USA. |
Abstract | We compared the output of the Santa Barbara microwave canopy backscatter model to polarimetric synthetic aperture radar (SAR) data for three ponderosa pine stands (ST-2, ST-11, and SP-2) with discontinuous tree canopies near Mt. Shasta, California, at P-band (0.68-m wavelength), L-band (0.235-m wavelength), and C-band (0.056-m wavelength). Given the SAR data calibration uncertainty, the model made good predictions of the P-HH, P-VV, L-HH, C-HH, and C-HV backscatter for the three stands, and the P-HV and L-HV backscatter for ST-2 and SP-2. The model underestimated C-VV for the three stands, and P-HV, L-HV, and L-VV backscatter for ST-11. The observed and modeled VV-HH phase differences were similar or equal to 0 degrees for the three stands at C-band and L-band, and for SP-2 at P-band. At P-band, the observed and modeled VV-HH phase differences were at least -80 degrees for ST-2 and ST-11, which indicates that double-bounce scattering contributes to the total backscatter for the two stands. [References: 10] 10 |