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Dual frequency scatterometer measurement of ocean wave height
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Weissman, D. E. Johnson, J. W. Grantham, W. L. Jones, W. L. Swift, C. T. |
| Copyright Year | 1975 |
| Description | A technique for remotely measuring wave height averaged over an area of the sea surface was developed and verified with a series of aircraft flight experiments. The measurement concept involves the cross correlation of the amplitude fluctuations of two monochromatic reflected signals with variable frequency separation. The signal reflected by the randomly distributed specular points on the surface is observed in the backscatter direction at nadir incidence angle. The measured correlation coefficient is equal to the square of the magnitude of the characteristic function of the specular point height from which RMS wave height can be determined. The flight scatterometer operates at 13.9 GHz and 13.9 - delta f GHz with a maximum delta f of 40 MHz. Measurements were conducted for low and moderate sea states at altitudes of 2, 5, and 10 thousand feet. The experimental results agree with the predicted decorrelation with frequency separation and with off-nadir incidence angle. |
| File Size | 2655705 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750020587 |
| Archival Resource Key | ark:/13960/t3b03xp2z |
| Language | English |
| Publisher Date | 1975-07-08 |
| Access Restriction | Open |
| Subject Keyword | Oceanography Scatterometers Water Waves Remote Sensors Sea States Electromagnetic Scattering Radar Scattering Aerial Photography Ocean Surface Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
