Title :
Environmental effects on errors in two-way time transfer
Author :
Ascarrunz, F.G. ; Jefferts, S.R. ; Parker, T.E.
Author_Institution :
Time & Frequency Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
We have investigated errors in two-way time transfer due to environmental fluctuations in temperature and power levels. The overall temperature coefficient of two Earth stations at the National Institute of Standards and Technology (NIST) have been found to be on the order of 100 pS/K Sub-component temperature coefficients are as high as 400 pS/K. The errors in two-way time transfer due to variations in power levels have been measured to be as large as 12 nS. These errors are due to distortion in the pn sequence due to gain compression in the earth-station.
Keywords :
clocks; measurement errors; measurement standards; satellite telemetry; time measurement; 12 ns; Earth stations; NIST; clock comparisons; environmental effects; gain compression; measurement errors; overall temperature coefficient; pn sequence; power level fluctuations; sub-component temperature coefficients; synchronisation; temperature fluctuations; time measurement; two-way time transfer; Clocks; Delay effects; Fluctuations; Frequency; Modems; NIST; Satellite ground stations; Temperature dependence; Temperature sensors; Time measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547327
