| Title: |
Measurement of soil moisture trends with airborne scatterometers
|
| Author(s): |
NONE
|
| Abstract: |
The author has identified the following significant results. Cursory examination of the data indicates that the listed row tillage practices at 90 deg to the radar beam are approximately 12.5db higher than other comparable agricultural land. The Seasat radar data show evidence that the high return occurs only at a narrow range in look direction near the 90 deg. Such a high increase in return compared to a 15db range in film response would indicate that rows seen crosswise would saturate optically processed data. This response to row direction will have an adverse effect on monitoring agricultural lands with L band radar systems. Preliminary examination indicates that there is no sensitivity to soil moisture at the 5 deg look angle when using a like-polarized L band system. Some sensitivity was evident at a look angle of 20 deg and only a weak sensitivity was indicated at 40 deg look angle. At both 20 deg and 40 deg there is a significant response to soil moisture and none to row direction. Steep angles or the 5 deg look angle using cross polarized (HB) L band system appear insensitive to row direction and soil moisture.
|
| NASA Center: |
NASA (non Center Specific)
|
| Publication Date: |
Jan 1, 1980
|
| Document Source: |
CASI |
| No Digital Version Available: |
|
| Document ID: |
19800010240
|
| Accession ID: |
80N18514
|
| Publication Information: |
Number of Pages = 71 |
| Report Number: |
E80-10064; NASA-CR-162586; RSC-3458-4
|
| Contract-Grant-Task Number: |
NSG-5134 |
| Price Code: |
A04 |
| Keywords: |
FARMLANDS; KANSAS; OKLAHOMA; RADAR IMAGERY; SCATTERING COEFFICIENTS; SIGNATURE ANALYSIS; SOIL MOISTURE; THERMAL MAPPING; EARTH RESOURCES PROGRAM; MULTISPECTRAL BAND SCANNERS; SCATTEROMETERS; SEASAT SATELLITES; SYNTHETIC APERTURE RADAR;
|
| Accessibility: |
Unclassified; No Copyright; Unlimited; Publicly available; Progress Report |
| Updated/Added to NTRS: |
2008-06-30 |
