Abstract
The receiving antenna position error is one of the considerable error sources of the GPS time comparison. A simple relative positioning method using the GPS time comparison data themselves is suggested to improve the time comparison precision. This method is applied to the time comparison values between the Communications Research Laboratory (CRL) and the Sugadaira Space Radio Observatory (SSRO), University of Electro-Communications. As a result, the receiving antenna position at the SSRO is determined with a precision of 1.4 m assuming the position of the CRL is known. The RWMS (the Root Weighted Mean Squared) error of the time comparison results is reduced from 50.3 ns of the observed values to 7.8 ns of the post-fit residuals.
