Engineering topics
Shambayati, S.
Publications and source records attributed to Shambayati, S..
Mars Global Surveyor Ka-Band Data Analysis
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Mars Global Surveyor Ka-Band Data Analysis
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The Mars Global Surveyor Ka-Band Link Experiment (MGS/KaBLE-II)
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Recent Results From The Mars Global Surveyor Ka-Band Link Experiment (MGS/KaBLE-II)
The Mars Global Surveyor (MGS) spacecraft, launched on November 7, 1996, carries an experimental space-to-ground telecommunications link at Ka-Band (32 GHz) along with the primary X-band (8.4 GHz) downlink.
Analysis of 31.4GHz Atmospheric Noise Temperature Measurements at Madrid Deep Space Communications Complex
The atmospheric noise temperature at 31.4GHz was measured at NASA's Deep Space Communications Complex at Madrid from September 1990 to December 1996 excluding February 1991 and May 1992 using a Water Vapor Radiometer.
Recent Results from the Mars Global Surveyor Ka-Band Link Experiment (MGS/KaBLE-II)
The Mars Global Surveyor (MGS) Spacecraft Carries an Experimental Ka-Band (32 GHz) Telecommunications Link in addition to the primary X-Band (8.4 GHz) downlink.
Analysis of 31.4GHz Atmospheric Noise Temperature Measurements
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Tracking the Galileo spacecraft with the DSCC Galileo Telemetry prototype
On day of the year 062, 1994, a prototype of the Deep Space Communications Complex Galileo Telemetry subsystem successfully tracked and processed signals from the Galileo spacecraft, under fully suppressed-carrier modulation. The demonstration took place at Goldstone, employing the 70-m antenna and the 34-m high-efficiency antenna. This article presents the findings from that demonstration. Specific issues are the system performance in terms of signal-to-noise (SNR) degradation and the arraying gain. Validation of the test results is via symbol-error-rate measurement and the standard symbol SNR. The analysis is also extended to include characterization of the signal received from Galileo.