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A proposed method for wind velocity measurement from space
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Censor, D. Levine, D. M. |
| Copyright Year | 1980 |
| Description | An investigation was made of the feasibility of making wind velocity measurements from space by monitoring the apparent change in the refractive index of the atmosphere induced by motion of the air. The physical principle is the same as that resulting in the phase changes measured in the Fizeau experiment. It is proposed that this phase change could be measured using a three cornered arrangement of satellite borne source and reflectors, around which two laser beams propagate in opposite directions. It is shown that even though the velocity of the satellites is much larger than the wind velocity, factors such as change in satellite position and Doppler shifts can be taken into account in a reasonable manner and the Fizeau phase measured. This phase measurement yields an average wind velocity along the ray path through the atmosphere. The method requires neither high accuracy for satellite position or velocity, nor precise knowledge of the refractive index or its gradient in the atmosphere. However, the method intrinsically yields wind velocity integrated along the ray path; hence to obtain higher spatial resolution, inversion techniques are required. |
| File Size | 1285937 |
| Page Count | 37 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810007123 |
| Archival Resource Key | ark:/13960/t9r25rk5t |
| Language | English |
| Publisher Date | 1980-11-01 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Atmospheric Circulation Fizeau Effect Satellite-borne Instruments Wind Velocity Wind Velocity Measurement Satellite Observation Doppler Effect Atmospheric Refraction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
