Loading...
Please wait, while we are loading the content...
Similar Documents
Ats-6 ascending: near horizon measurements over water at 30 ghz
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Straiton, A. W. Vogel, W. J. Fannin, B. M. |
| Copyright Year | 1977 |
| Description | The return of the ATS 6 satellite to a western longitude during the fall of 1976 presented a unique opportunity to perform low angle of elevation measurements at 30 GHz. For this purpose a receiver using a 1.5 m antenna was set up at Port Aransas, Texas, resulting in a propagation path entirely over water. The 30 GHz beacon was monitored daily for at least one hour from 8 September 1976 to 21 September 1976. During the time the elevation angle changed from 1.5 deg to 17.3 deg, the mean attenuation decreased from 20 dB to 2 dB and the standard deviation from over 6 dB to less than .2 dB. The deep fades at angles below 4 deg show significantly sharper nulls than peaks on a log scale. Spectra of the log amplitude fluctuations vary as the (-8/3) power of the spectral frequency in the limit. A flattening is noticeable at the low frequencies. A precipitation event at 8.5 deg elevation produced a 16 dB fade and significantly increased the variance. |
| File Size | 999639 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800016019 |
| Archival Resource Key | ark:/13960/t76t5g21x |
| Language | English |
| Publisher Date | 1977-04-01 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Signal Fading Wave Attenuation Power Spectra Satellite Transmission Millimeter Waves Reception Diversity Atmospheric Attenuation Ats 6 Elevation Angle Propagation Modes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
