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Results from two years of ka-band propagation characterization at svalbard, norway
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zemba, Michael Morse, Jacquelynne Rose Nessel, James A. |
| Copyright Year | 2014 |
| Description | Over the several years, NASA plans to launch several earth science missions which are expected to achieve data throughputs of 5-40 terabits per day transmitted from low earth orbiting spacecraft to ground stations. The current S-band and X-band frequency allocations in use by NASA, however, are incapable of supporting the data rates required to meet this demand. As such, NASA is in the planning stages to upgrade its existing Near Earth Network (NEN) Polar ground stations to support Ka-band (25.5-27 GHz) operations. Consequently, it becomes imperative that characterization of propagation effects at these NEN sites is conducted to determine expected system performance, particularly at low elevation angles ((is) less than 10 deg) where spacecraft signal acquisition typically occurs. Since May 2011, NASA Glenn Research Center has installed and operated a Ka-band radiometer at the NEN site located in Svalbard, Norway. The Ka-band radiometer monitors the water vapor line, as well as 6 frequencies around 26.5 GHz at multiple elevation angles: 45 deg, 20 deg, and 10 deg. Two year data collection results indicate comparable performance to previously characterized northern latitude sites in the United States, i.e., Fairbanks, Alaska. It is observed that cloud cover at the Svalbard site remains the dominant loss mechanism for Ka-band links, resulting in a margin requirement of 4.1 dB to maintain link availability of 99% at 10 deg elevation. |
| File Size | 1326954 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140017334 |
| Archival Resource Key | ark:/13960/t7gr1x62v |
| Language | English |
| Publisher Date | 2014-04-06 |
| Access Restriction | Open |
| Subject Keyword | Near Earth Network Propagation Ka-band Extremely High Frequencies Npoess Data Acquisition Earth Observations From Space Earth Sciences Ground Stations Elevation Angle Microwave Radiometers Cloud Cover Radio Frequencies Low Earth Orbits Norway Atmospheric Attenuation Alaska Environmental Monitoring Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
