| Title | Optical Communications and Detection Systems |
|---|---|
| Record ID | 49513 |
| Personal Name Creator |
Buck, R. E.; Gagnon, R.; Jordan, L. M.; Karp, S.; Leonard, E. T.; Morin, S. J. |
| Source | 101p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Corporate Contributor |
United States. National Aeronautics and Space Administration |
| Publisher | United States. National Aeronautics and Space Administration |
| Publication Date | 19710801 |
| Language | English |
| Abstract | The two milestones of the program (1) development of a high quantum efficiency 1.06 micron photomissive surface and (2) narrow pulse propatation in the earth's atmosphere at 0.63 microns were completed. Item 1 was completed in a contract award. Item 2 was completed to the extent permitted by the weather conditions in that only two foggy days were encountered during the three month period. The clear air measurements indicated that: pulse broadening in the atmosphere is less than 20 picoseconds or a coherence bandwidth in excess of 50 GHz; aperture averaging appears to progress with the square of the collector diameter for large diameters; statistics of aperture averaged signal remain log normal. The measurements from one foggy day indicate: no pulse broadening was observed in fogs with 1/4 mile visibility although a 20dB loss was encountered; no return from multiple scattering could be observed to a 4 degree field of view with a 20dB dynamic range in the detector; no Doppler broadening greater than 1 KHz was observed with optical thickness as high as 4. |
| Rosap ID | dot:10953 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10953 |
| TRT Terms | Communication systems; Communication; Detection and identification systems; Measurement of specific phenomena; Optical instruments |
| General Subjects | Scintillators; Pulse amplitude modification |
| Classification | NTL - AVIATION - AVIATION |
| Geographical Coverage |
United States |
| Report Number | DOT-TSC-NASA-71-12 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/49000/49500/49513/DOT-TSC-NASA-71-12.pdf |
| Format | |
| Database | NTL Digital Repository |