TWSTFT WG Activity and Future Plan in the Asia Pacific-Rim Region Coordinator, Hideo MAENO Sub-coordinator, Tomonari SUZUYAMA Sub-coordinator, Sung Hoon YANG 24th APMP TCTF TWSTFT WG

Network of TWSTFT 24th APMP TCTF TWSTFT WG

Asian link Satellite Participants JCSAT-1B NICT, KRISS, TL, NMIJ, NTSC, SG, NICT LF station x2 24 sessions/day, Stable and high-quality link JCSAT-1B will complete the service in 2010/4. Plan to shift it to a new satellite from 2009/4 or 2010/4 now. Proposed satellites: IS-8, GE-23 24th APMP TCTF TWSTFT WG

Asian link 20 ns 20 days 20 days 500 ps 24th APMP TCTF TWSTFT WG

Asian-Hawaiian-US link ??? AMC-1 Hawaii MS@Kauai from 2009 USNO to link to GPStime NICT TL JCSAT-1B will complete the service in 2010/4. Alternative satellite is under investigation. Proposed satellites: IS-8, GE-23, JCSAT-1B w/ inclined orbit We hope the construction of Hawaiian station will be finished by 2009/3 and start to operate from 2009/4... 24th APMP TCTF TWSTFT WG

Eu-Asian link Satellite Participants IS-4 NICT modem: PTB, NICT, KRISS, NMIJ SATRE modem: PTB, NICT, TL, NTSC 24 sessions/day OP and VSL will join in near future. 24th APMP TCTF TWSTFT WG

Time schedule TWSTFT Link fee 2007/09 2008/09 2009/04 2010/03 NICT modem SATRE modem only SATRE modem TWSTFT NICT pays the link fee Sharing Link fee Fix how to share the fee Sharing start Plan the fee budget 24th APMP TCTF TWSTFT WG

Asian-European link via IS-4 Promotion of IS-4 Asian-European link Until 2009/3, NICT pays the link fee. - Any users are welcomed to join the link free of charge. - Available time is divided into SATRE-modem link and NICT-modem link. From 2009/4, NICT wants to share the fee with participants in the link. - Integration into SATRE-modem link New participants are much welcomed. 24th APMP TCTF TWSTFT WG

Problem of Asian-European link “Intelsat, Tokyo Office provides an important information” Indian Co. plans to use all transponders of IS-4. In this case, we will lose the opportunity to use the link after April 2009. NICT explains the details of the problem on the following agenda today… 24th APMP TCTF TWSTFT WG

Eu-Asia link 5 ns 5 days almost White PM 5 days 0.5 ns *Comparison of modems. *Equipment except modems are common. *Differences look WPM. 24th APMP TCTF TWSTFT WG

Eu-Asia link 5 ns 5 days White FM *Indirect link using different stations and modems. *Differences look WFM. 474 points StdDev: 522 ps 0.5 ns 5 days 24th APMP TCTF TWSTFT WG

Summary Most links under regular observations perform stably. The stations in Asia will link directly to Europe. Link fees are to be shared. The Hawaiian station link will be built in 2009. We may need to change a satellite in near future. 24th APMP TCTF TWSTFT WG