Y. Zheng et al., TIME-DELAY AND DELAY RATE MODELS FOR SPACE VLBI, Science in China. Series A, Mathematics, Physics, Astronomy & Technological Sciences, 36(10), 1993, pp. 1238-1241
Based on the relativistic time-space theory, we derived the space VLBI
time delay and delay rate calculation models with an accuracy of 1 ps
and 10(-3) ps/s, respectively. The longest suitable baseline of the m
odels is 4 X 10(5) km (Earth-Moon distance).