Time and Frequency Transfer
GPS Observations
GPS Carrier Phase
TWSTFT
Optical Fiber Time Transfer

Two-way Satellite Time Transfer

We setup 2 sets of earth station equipment for C-band and Ku-band two-way satellite time transfer experiment. As for the modem, we have one ATLENTIS modem, two SATRE modems, and two NIST modems. We have started the TWSTT experiments with CRL(Japan) by utilizing the ATLANTIS modem and Ku-band ground station through JCSAT satellite since June, 2000. We plan to execute the TWSTT experiment with CSIRO(Australia) and NIST(USA) through SATRE modem and C-band facility. TL also purchases a 2.4m Ku band ground station and a TWSTT experiment with USNO(USA) is planning.