2-WAY TIME TRANSFER EXPERIMENTS USING AN INTELSAT SATELLITE IN A INCLINED GEOSTATIONARY ORBIT

The Communications Research Laboratory (CRL) started a new two-way tim e transfer experiment program in 1988 based on a recommendation of the Conference Generale des Poids et Mesures (CGPM) in 1987. Korea Resear ch Institutes of Standards and Science (KRISS) and CRL, Japan agreed i n 1990 to an intergovernmental program of cooperation in the two-way t ime transfer experiments using satellites of the International Telecom munications Satellite Organization (INTELSAT). CRL prepared two sets o f Ku-band communications systems including a microwave time and rangin g experiment (MITREX) modem and a compatible prototype modem (I-modem) developed by CRL. CRL and KRISS had the opportunity to use INTELSAT s atellites for the two-way time transfer experiment. CRL performed two kinds of INTELSAT experiments: the ranging (RG) experiment and the Jap anese domestic (JD) experiment. CRL and KRISS also performed a Japan-K orea (JK) joint international experiment. This work describes the resu lts of these three experiments.