Sources of Scattering from Vegetation Canopies at 10 GHz
- 1 September 1985
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience and Remote Sensing
- Vol. GE-23 (5) , 737-745
- https://doi.org/10.1109/tgrs.1985.289392
Abstract
High-resolution backscatter measurements were made at X-band, with vertical polarization, and incidence angles of 30° and 50°, for winter wheat, soybeans, and corn during the summer of 1984. Plants were observed both under natural conditions and with partial-to-complete defoliation. The resolution volume of the measurement system is better than 20 × 20 × 11.25 cm3 within the entire range of measurements. Results are presented as a radar image, which also provides information on the spatial distribution of the (attenuated) scattering inside the canopy observed under natural conditions. Measured results indicate that: 1) for the full-grown wheat plants, heads are the dominant scatterers at the early heading stage and the ground is the dominant scatterer at the later growth stages; 2) for the soybeans, returns are mostly from the upper 30-cm portion of the plants, and leaves and stems dominate the radar signal at 30° and 50° incidence angles, respectively; 3) for the corn plants, leaves are the single dominan scatterers at both angles of incidence; and 4) ground returns are relatively unimportant as they are highly attenuated by the vegetation cover.Keywords
This publication has 8 references indexed in Scilit:
- Preliminary results on the determination of the sources of scattering from vegetation canopies at 10 GHzf† I. Corn and miloInternational Journal of Remote Sensing, 1985
- Comparison of Multifrequency Band Radars for Crop ClassificationIEEE Transactions on Geoscience and Remote Sensing, 1983
- Electromagnetic Backscattering from a Layer of Vegetation: A Discrete ApproachIEEE Transactions on Geoscience and Remote Sensing, 1983
- A review of volume scatter theories for modeling applicationsRadio Science, 1982
- The Dutch ROVE ProgramIEEE Transactions on Geoscience and Remote Sensing, 1982
- Vegetation modeled as a water cloudRadio Science, 1978
- Corn growth as monitored by radarIEEE Transactions on Antennas and Propagation, 1976
- Radar response to vegetation II: 8-18 GHz bandIEEE Transactions on Antennas and Propagation, 1975