24 March 2000 FA/GPSW.377 Dear Colleagues, Please find enclosed the tracking schedule No 34 for international time and frequency comparisons by GPS common views. The schedule should be implemented, as given in the following pages, on MJD=51637 (3 April 2000) 0 h UTC. All scheduled satellites belong to Block II and may be subject to Selective Availability and Anti-Spoofing. The GPS tracking schedules are sent to regular users through mail and e-mail and are also available via our INTERNET anonymous FTP (ftp2.bipm.fr, node 62.161.69.5, subdirectory TAI) and on http://www.bipm.fr. This tracking schedule is referring its track times to MJD=50722 (1 October 1997), the reference date of the GPS schedule No 29. This has no incidence on your introduction of the schedule on 3 April 2000. The idea of setting a reference date has been adopted by the participants to the Open Forum organized by the CCTF Sub-group on GPS and GLONASS Time Transfer Standards (CGGTTS) on 1 December 1997 in Long Beach, California. It should be used from now for GPS and GLONASS International Common-View Schedules. This simplifies the use of multichannel receivers: these receivers will no longer necessitate any update at the moment of the introduction of new schedules into one-channel receivers. In the future when all one-channel receivers will be withdrawn from operation, the use of a fixed reference date for 'all-in-view' observations by multichannel receivers will permit to cease publication of the common-view schedules. Tracking schedule No 34 is the ninth issued by the BIPM in conformity with the Technical Directives for standardization drawn up by the CCTF Sub-group on GPS and GLONASS Time Transfer Standards. The time of a track given in this schedule is thus the date of the first observation. A period of about 2 minutes is usually required to lock the receiver on to the satellite signal. The characteristic date of a track given in this schedule does not correspond to the beginning of the lock-on procedure, and thus has a different meaning from that of earlier schedules. It follows that if you operate an 'NBS-type' receiver, for instance TTR 5, TTR 5A, TTR 6 or TTR 6A from AOA, equipped with old or new EPROMS you are invited to modify the given track time by 2 minutes: for example, the track of European schedule of PRN 18 at 00 h 30 should be entered in the AOA receivers as starting at 00 h 28. We would greatly appreciate if you would inform us of changes in your equipment, modifications of the adopted delays, change of antenna location ...., so that we can maintain the homogeneity of the time comparisons. Please feel free to contact us if there are questions, suggestions or comments regarding the enclosed documents. Yours sincerely, E. Felicitas Arias Head, Time Section *************************************************************************** * GPS Schedule no 34 * * for implementation on MJD = 51637 (2000 April 3) at 0h UTC * * Reference date MJD = 50722 (1997 October 1) * *************************************************************************** This is a suggested tracking schedule for international time comparisons using GPS satellites in common-view between ten areas of the globe. Area Participating laboratories Europe E AOS, BEV, CAO, CH, DLR, DTAG, GUM, IEN, IFAG, IPQ, LDS, Mad*, NPL, OMH, OP, ORB, PTB, RAAI*, RIRT*, ROA, SMU, SP, SU, TP, TUG, UME, VSL East North America ENA AO*, APL, NRC, USNO West North America WNA 3S Navigation*, CNM, Gold*, NIST, WWV*, AMC Hawaii H WWVH* East Asia EA BIRM, CRL, CSAO, KRIS, NAO, NIM, NRLM, PSB, SCL, SO, TL Australia and New Zealand A Can*, ATC*, ORR*, MSL, NML India I NPLI Middle East ME INPL South Africa SAF CSIR South America SAM IGMA, ONBA, ONRJ, Kou* * Mad, Gold, Can : JPL Deep Space Network, Madrid, Goldstone, Canberra. WWV, WWVH : NIST stations in Colorado and Hawaii. AO : Arecibo Observatory. Kou: CNES Kourou Center. ATC, ORR : Australian laboratories. 3S Navigation: Irvine, California. RIRT: Russian Institute of Radionavigation and Time, Saint Petersbourg. RAAI: Romanian Academy Astronomical Institute, Bucarest. Other laboratories are designated by their usual acronyms (see Table 3 of the Annual Report of the BIPM Time Section, Volume 11, 1998). The start times of the tracks are referenced to UTC. The start time of a track is the date of the first observation. It may be necessary to advance this time by 2 minutes if you operate an NBS-type receiver, in order to allow the lock-on procedure onto the satellite signal. The track length is 780 s. All the track times should be decremented by 4 minutes each day, to account for the GPS sidereal orbits. The track times are chosen to maximize elevation angles between pairs of stations. The class bytes are such that in association with the satellite number they form a unique identifyer for each common view. At the request of European laboratories, European schedule is divided into four sub-schedules. The establishment of sub-schedules permits the sharing of the work. European laboratories have been contacted to ensure the coordination of sub-schedules. 24 March 2000 To European Time Laboratories FA/GPSW.378 Dear Colleagues, As for the previous schedules, we have subdivided the European tracking schedule into four sub-schedules as follows: - sub-schedule E1 (23 tracks) is optimized for internal European links, with a diversity of satellites observed with high elevation; - sub-schedule E2 (35 tracks) includes E1 with addition of specific common views between Europe and North America; - sub-schedule E3 (29 tracks) includes E1 with addition of specific common views between Europe and Middle East or East Asia; - sub-schedule E4 (31 tracks) includes E1 with addition of specific common views between Europe and South America or South Africa. You are invited to follow the complete schedule. If you find it too heavy, however, do not hesitate to use one of the sub-schedules. Yours sincerely, E. Felicitas Arias Head, Time Section GPS Schedule no 34 ( 3 April 2000) *** Europe *** Class PRN Start Connects Subschedules h m E1 E2 E3 E4 10 18 0 30 EA,ME,I * * * * 4C 02 1 2 SAF,ME,I * 10 19 1 18 EA,ME,I * * * * 10 08 1 50 EA,ME,I * 10 27 2 6 EA,ME,I * 74 26 2 22 WNA,ME,ENA * 4C 10 2 38 SAF,ME,SAM * * * * 4C 13 2 54 SAF,ME,I * 08 09 3 26 WNA,ENA,SAM * 4C 07 3 42 SAF,ME,I * * * * 10 02 4 30 EA,ME,I * * * * 08 23 4 46 WNA,ENA,SAM * 10 07 5 34 EA,ME,I * * * * 08 29 6 54 WNA,ENA,SAM * * * * 4C 09 7 10 SAF,ME,I * 10 04 7 26 EA,ME,I * * * * 4C 06 7 42 SAF,ME,SAM * 10 24 8 30 EA,ME,I * * * * 08 25 8 46 WNA,ENA * 74 25 9 34 WNA,ME,ENA,SAM * * * * 08 22 10 50 WNA,ENA * * * * 74 22 11 38 WNA,ME,ENA * * * * 10 06 11 54 EA,ME,I * 08 03 12 10 WNA,ENA,SAM * * * * 74 03 12 58 WNA,ME,ENA * 10 17 13 14 EA,ME,I * 08 31 13 30 WNA,ENA,SAM * * * * 00 15 14 18 ENA,ME,SAM * 74 31 14 34 WNA,ME,ENA * * * * 10 23 14 50 EA,ME,I * 08 11 15 22 WNA,ENA,SAM * * * * 4C 03 15 54 SAF,ME,I * 74 11 16 10 WNA,ME,ENA,SAM * 10 21 16 42 EA,ME,I * * * * 10 29 16 58 EA,ME,I * 4C 15 18 18 SAF,ME,I * * * * 4C 01 18 34 SAF,ME,SAM * * * * 08 07 19 6 WNA,ENA,SAM * 10 25 19 22 EA,ME,I * * * * 4C 11 19 38 SAF,ME,I * 4C 18 19 54 SAF,ME,SAM * 74 04 20 58 WNA,ME,ENA * * * * 4C 08 22 2 SAF,ME * 10 01 22 18 EA,ME,I * * * * 08 24 22 50 WNA,ENA,SAM,ME * 74 24 23 6 WNA,ME,ENA,SAM * 4C 04 23 22 SAF,ME,SAM * * * * 08 10 23 38 WNA,ENA * GPS Schedule no 34 ( 3 April 2000) *** E. North America *** *** W. North America *** *** East Asia *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 68 26 0 30 SAM,WNA 68 26 0 30 ENA,SAM 10 18 0 30 E,ME,I 32 17 0 46 H,WNA 32 17 0 46 H,ENA 10 19 1 18 E,ME,I 3B 06 1 2 H,SAM,WNA 3B 06 1 2 H,SAM,ENA 98 15 1 34 A,H 74 26 2 22 WNA,ME,E 74 26 2 22 ME,E,ENA 10 08 1 50 E,ME,I 68 17 3 10 SAM,WNA 68 17 3 10 ENA,SAM 10 27 2 6 E,ME,I 08 09 3 26 E,WNA,SAM 08 09 3 26 E,ENA,SAM 98 11 2 38 A,I 28 15 4 14 WNA,EA,H 28 31 3 58 EA,H 28 31 3 58 WNA,H 08 23 4 46 E,WNA,SAM 28 15 4 14 EA,H,ENA 28 15 4 14 WNA,H,ENA 32 15 6 6 H 08 23 4 46 E,ENA,SAM 10 02 4 30 E,ME,I 68 21 6 22 SAM,WNA 28 11 5 50 EA,H 98 27 4 46 A,I 08 29 6 54 E,WNA,SAM 68 21 6 22 ENA,SAM 98 14 5 2 A,H 28 14 7 42 WNA,EA,H 08 29 6 54 E,ENA,SAM 10 07 5 34 E,ME,I 68 22 8 30 SAM,WNA 28 14 7 42 EA,H,ENA 28 11 5 50 WNA,H 08 25 8 46 E,WNA 68 22 8 30 ENA,SAM 98 16 6 22 A,H 28 16 9 2 WNA,EA,H 08 25 8 46 E,ENA 98 02 6 54 A,I 32 14 9 18 H,WNA 28 16 9 2 EA,H,ENA 10 04 7 26 E,ME,I 74 25 9 34 WNA,ME,E,SAM 32 14 9 18 H,ENA 28 14 7 42 WNA,H,ENA 28 18 10 22 WNA,EA,H 74 25 9 34 ME,E,ENA,SAM 98 18 7 58 A,H 08 22 10 50 E,WNA 28 18 10 22 EA,H,ENA 98 07 8 14 A,H,I 3B 01 11 22 H,SAM,WNA 08 22 10 50 E,ENA 10 24 8 30 E,ME,I 74 22 11 38 WNA,ME,E 3B 01 11 22 H,SAM,ENA 28 16 9 2 WNA,H,ENA 68 31 11 54 SAM,WNA 74 22 11 38 ME,E,ENA 98 13 9 50 A,H 08 03 12 10 E,WNA,SAM 68 31 11 54 ENA,SAM 28 18 10 22 WNA,H,ENA 32 08 12 26 H,WNA 08 03 12 10 E,ENA,SAM 98 04 11 6 A,H 28 13 12 42 WNA,EA,H 32 08 12 26 H,ENA 98 26 11 38 A,I 74 03 12 58 WNA,ME,E 28 13 12 42 EA,H,ENA 10 06 11 54 E,ME,I 08 31 13 30 E,WNA,SAM 74 03 12 58 ME,E,ENA 98 24 12 10 A,H 32 13 13 46 H,WNA 08 31 13 30 E,ENA,SAM 28 13 12 42 WNA,H,ENA 68 18 14 2 SAM,WNA 32 13 13 46 H,ENA 10 17 13 14 E,ME,I 00 15 14 18 E,ME,SAM 68 18 14 2 ENA,SAM 98 10 14 18 A,H 74 31 14 34 WNA,ME,E 74 31 14 34 ME,E,ENA 98 09 14 34 A,I 68 08 14 50 SAM,WNA 68 08 14 50 ENA,SAM 10 23 14 50 E,ME,I 08 11 15 22 E,WNA,SAM 08 11 15 22 E,ENA,SAM 98 17 16 10 A,I 32 02 15 38 H,WNA 32 02 15 38 H,ENA 98 05 16 26 A,H 68 27 15 54 SAM,WNA 68 27 15 54 ENA,SAM 10 21 16 42 E,ME,I 74 11 16 10 WNA,ME,E,SAM 74 11 16 10 ME,E,ENA,SAM 10 29 16 58 E,ME,I 32 07 16 42 H,WNA 32 07 16 42 H,ENA 98 23 17 30 A,I 28 09 18 2 WNA,EA,H 28 09 18 2 EA,H,ENA 28 09 18 2 WNA,H,ENA 3B 04 18 18 H,SAM,WNA 3B 04 18 18 H,SAM,ENA 98 21 19 6 A,I 08 07 19 6 E,WNA,SAM 08 07 19 6 E,ENA,SAM 10 25 19 22 E,ME,I 32 05 20 26 H,WNA 32 05 20 26 H,ENA 98 06 19 38 A,H 28 30 20 42 WNA,EA,H 28 30 20 42 EA,H,ENA 98 29 20 10 A,H 74 04 20 58 WNA,ME,E 74 04 20 58 ME,E,ENA 28 30 20 42 WNA,H,ENA 28 06 22 2 WNA,EA,H 28 06 22 2 EA,H,ENA 28 06 22 2 WNA,H,ENA 08 24 22 50 E,WNA,SAM,ME 08 24 22 50 E,ENA,SAM,ME 10 01 22 18 E,ME,I 74 24 23 6 WNA,ME,E,SAM 74 24 23 6 ME,E,ENA,SAM 98 03 22 34 A,I 32 06 23 22 H,WNA 32 06 23 22 H,ENA 98 25 23 6 A,H 08 10 23 38 E,WNA 08 10 23 38 E,ENA 98 31 23 22 A,I GPS Schedule no 34 ( 3 April 2000) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 3C 21 0 30 A 3C 21 0 30 H 10 18 0 30 E,EA,ME 32 17 0 46 ENA,WNA CC 14 0 46 SAF 4C 02 1 2 E,SAF,ME 3B 06 1 2 SAM,ENA,WNA 98 15 1 34 EA,H 10 19 1 18 E,EA,ME 98 15 1 34 EA,A CC 16 2 22 SAF 10 08 1 50 E,EA,ME 3C 22 2 54 A 98 11 2 38 EA,I 10 27 2 6 E,EA,ME 38 11 3 26 I 3C 22 2 54 H 98 11 2 38 EA,A 28 31 3 58 WNA,EA CC 18 3 26 SAF 4C 13 2 54 E,SAF,ME 28 15 4 14 WNA,EA,ENA 98 27 4 46 EA,I 38 11 3 26 H 98 14 5 2 EA,A 98 14 5 2 EA,H 4C 07 3 42 E,SAF,ME 3B 25 5 34 SAM CC 13 5 50 SAF 10 02 4 30 E,EA,ME 28 11 5 50 WNA,EA 98 16 6 22 EA,H 98 27 4 46 EA,A 32 15 6 6 ENA 98 02 6 54 EA,I 10 07 5 34 E,EA,ME 98 16 6 22 EA,A CC 10 7 26 SAF A4 24 6 38 SAF 28 14 7 42 WNA,EA,ENA 98 18 7 58 EA,H 98 02 6 54 EA,A 98 18 7 58 EA,A 98 07 8 14 EA,H,I 4C 09 7 10 E,SAF,ME 98 07 8 14 EA,A,I CC 26 9 18 SAF 10 04 7 26 E,EA,ME 38 04 8 46 I 98 13 9 50 EA,H 98 07 8 14 EA,A,H 28 16 9 2 WNA,EA,ENA 98 04 11 6 EA,H 10 24 8 30 E,EA,ME 32 14 9 18 ENA,WNA CC 09 11 22 SAF 38 04 8 46 H 98 13 9 50 EA,A 98 26 11 38 EA,I BC 05 9 50 SAF,ME 28 18 10 22 WNA,EA,ENA 98 24 12 10 EA,H 38 24 10 50 H 38 24 10 50 I CC 05 12 26 SAF A4 30 11 6 SAF 98 04 11 6 EA,A CC 30 14 2 SAF 98 26 11 38 EA,A 3B 01 11 22 SAM,ENA,WNA 98 10 14 18 EA,H 10 06 11 54 E,EA,ME 98 24 12 10 EA,A 98 09 14 34 EA,I A4 23 12 10 SAF 32 08 12 26 ENA,WNA CC 06 14 50 SAF 10 17 13 14 E,EA,ME 28 13 12 42 WNA,EA,ENA 98 17 16 10 EA,I 38 26 14 2 H 32 13 13 46 ENA,WNA 98 05 16 26 EA,H 98 09 14 34 EA,A 38 26 14 2 I 98 23 17 30 EA,I 10 23 14 50 E,EA,ME 98 10 14 18 EA,A CC 22 18 50 SAF 4C 03 15 54 E,SAF,ME 32 02 15 38 ENA,WNA 98 21 19 6 EA,I 98 17 16 10 EA,A 98 05 16 26 EA,A CC 03 19 22 SAF 10 21 16 42 E,EA,ME 32 07 16 42 ENA,WNA 98 06 19 38 EA,H 10 29 16 58 E,EA,ME 28 09 18 2 WNA,EA,ENA 98 29 20 10 EA,H 98 23 17 30 EA,A 3B 04 18 18 SAM,ENA,WNA CC 31 21 14 SAF 4C 15 18 18 E,SAF,ME 38 29 18 50 I CC 15 21 30 SAF 38 29 18 50 H 98 06 19 38 EA,A 98 03 22 34 EA,I 98 21 19 6 EA,A 98 29 20 10 EA,A CC 11 22 50 SAF 10 25 19 22 E,EA,ME 32 05 20 26 ENA,WNA 98 25 23 6 EA,H 4C 11 19 38 E,SAF,ME 28 30 20 42 WNA,EA,ENA 98 31 23 22 EA,I 38 25 21 14 H 38 25 21 14 I 10 01 22 18 E,EA,ME 28 06 22 2 WNA,EA,ENA 98 03 22 34 EA,A 98 25 23 6 EA,A 98 31 23 22 EA,A 32 06 23 22 ENA,WNA A4 16 23 38 SAF GPS Schedule no 34 ( 3 April 2000) *** Middle East *** *** South Africa *** *** South America *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 10 18 0 30 E,EA,I CA 04 0 14 SAM CA 04 0 14 SAF 4C 02 1 2 E,SAF,I CC 14 0 46 A 68 26 0 30 ENA,WNA 10 19 1 18 E,EA,I 4C 02 1 2 E,ME,I 3B 06 1 2 H,ENA,WNA 10 08 1 50 E,EA,I CC 16 2 22 A 4C 10 2 38 E,SAF,ME 10 27 2 6 E,EA,I 4C 10 2 38 E,ME,SAM 68 17 3 10 ENA,WNA 74 26 2 22 WNA,E,ENA 4C 13 2 54 E,ME,I 08 09 3 26 E,WNA,ENA 4C 10 2 38 E,SAF,SAM CC 18 3 26 A CA 05 3 58 SAF 4C 13 2 54 E,SAF,I 4C 07 3 42 E,ME,I 08 23 4 46 E,WNA,ENA 4C 07 3 42 E,SAF,I CA 05 3 58 SAM 3B 25 5 34 H 10 02 4 30 E,EA,I CC 13 5 50 A 68 21 6 22 ENA,WNA 10 07 5 34 E,EA,I A4 24 6 38 I 08 29 6 54 E,WNA,ENA 4C 09 7 10 E,SAF,I 4C 09 7 10 E,ME,I 4C 06 7 42 E,SAF,ME 10 04 7 26 E,EA,I CC 10 7 26 A BC 06 7 58 ME 4C 06 7 42 E,SAF,SAM 4C 06 7 42 E,ME,SAM 68 22 8 30 ENA,WNA BC 06 7 58 SAM CC 26 9 18 A 74 25 9 34 WNA,ME,E,ENA 10 24 8 30 E,EA,I BC 05 9 50 ME,I CA 21 10 6 SAF 74 25 9 34 WNA,E,ENA,SAM CA 21 10 6 SAM 3B 01 11 22 H,ENA,WNA BC 05 9 50 SAF,I A4 30 11 6 I 68 31 11 54 ENA,WNA 74 22 11 38 WNA,E,ENA CC 09 11 22 A 08 03 12 10 E,WNA,ENA 10 06 11 54 E,EA,I A4 23 12 10 I 08 31 13 30 E,WNA,ENA 74 03 12 58 WNA,E,ENA CC 05 12 26 A 68 18 14 2 ENA,WNA 10 17 13 14 E,EA,I CC 30 14 2 A 00 15 14 18 E,ENA,ME 00 15 14 18 E,ENA,SAM CC 06 14 50 A 68 08 14 50 ENA,WNA 74 31 14 34 WNA,E,ENA CA 22 15 6 SAM CA 22 15 6 SAF 10 23 14 50 E,EA,I CA 14 15 38 SAM 08 11 15 22 E,WNA,ENA 4C 03 15 54 E,SAF,I 4C 03 15 54 E,ME,I CA 14 15 38 SAF 74 11 16 10 WNA,E,ENA,SAM CA 01 17 14 SAM 68 27 15 54 ENA,WNA 10 21 16 42 E,EA,I 4C 15 18 18 E,ME,I 74 11 16 10 WNA,ME,E,ENA 10 29 16 58 E,EA,I 4C 01 18 34 E,ME,SAM CA 01 17 14 SAF 4C 15 18 18 E,SAF,I CC 22 18 50 A 3B 04 18 18 H,ENA,WNA 4C 01 18 34 E,SAF,SAM CC 03 19 22 A 4C 01 18 34 E,SAF,ME 10 25 19 22 E,EA,I 4C 11 19 38 E,ME,I 08 07 19 6 E,WNA,ENA 4C 11 19 38 E,SAF,I 4C 18 19 54 E,ME,SAM 4C 18 19 54 E,SAF,ME 4C 18 19 54 E,SAF,SAM CC 31 21 14 A C2 18 20 26 ME C2 18 20 26 SAM CC 15 21 30 A 08 24 22 50 E,WNA,ENA,ME 74 04 20 58 WNA,E,ENA BC 19 21 46 ME 74 24 23 6 WNA,ME,E,ENA BC 19 21 46 SAF 4C 08 22 2 E,ME 4C 04 23 22 E,SAF,ME 4C 08 22 2 E,SAF BC 27 22 34 ME 10 01 22 18 E,EA,I CC 11 22 50 A BC 27 22 34 SAF 4C 04 23 22 E,ME,SAM 08 24 22 50 E,WNA,ENA,SAM A4 16 23 38 I 74 24 23 6 WNA,E,ENA,SAM 4C 04 23 22 E,SAF,SAM