Computer Science
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nascp3046..179t&link_type=abstract
In NASA, Relativistic Gravitational Experiments in Space p 179-185 (SEE N90-19940 12-90)
Computer Science
Atmospheric Refraction, Doppler Radar, Gravity Waves, Tropospheric Radiation, Wave Dispersion, Atmospheric Moisture, Global Positioning System, Radar Tracking, Refractivity, Signal Analysis, Water Vapor
Scientific paper
Tropospheric refractivity fluctuations are an important error source for gravity wave detection by Doppler tracking in that they alter the phase and phase rate of electromagnetic signals. Estimates are presented of the effect of tropospheric fluctuations on the Doppler signal and some examples are suggested of methods which minimize the effect. A model of the fluctuations is utilized to achieve those goals. Four possible methods for reducing the fluctuation effect are suggested: (1) observation and analysis strategies, which separate the atmospheric and gravity wave signatures; (2) water vapor radiometry for the wet component; (3) calibration using Global Positioning System (GPS) satellites; and (4) Doppler observations from multiple antennas to average fluctuation effects. The last two techniques could be used to calibrate both wet and dry fluctuations, or could be used in conjunction with water vapor radiometry to calibrate only the dry component.
Resch George M.
Treuhaft Robert N.
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