8 September 1999 GP/GPSW.364 Dear Colleagues, Please find enclosed the tracking schedule No 33 for international time and frequency comparisons by GPS common views. The schedule should be implemented, as given in the following pages, on MJD=51452 (1 October 1999) 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 1 October 1999. 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 In the future when all one- channel receivers will be withdrawn from operation, the use of a fixed reference date for ‘all- in-view’ observations by multichannel receivers will permit to cease publication of the common-view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 33 is the eighth 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 6 at 00 h 18 should be entered in the AOA receivers as starting at 00 h 16. 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, G‚rard Petit Responsable par int‚rim, section du temps 8 September 1999 To European Time Laboratories CT/GPSW.365 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 (30 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, G‚rard Petit Reponsable par int‚rim, section du temps *************************************************************************** * GPS Schedule no 33 * * for implementation on MJD = 51452 (1999 October 1) 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. Schedule no 33 (1999 October 1) *** Europe *** Class PRN Start Connects Subschedules h m E1 E2 E3 E4 10 6 0 18 EA,ME,I * * * * CA 25 0 34 SAF,SAM * 08 3 0 50 WNA,ENA,SAM * 4C 23 1 22 SAF,ME,I * * * * 74 3 1 38 WNA,ME,ENA * 10 17 2 10 EA,ME,I * * * * 08 31 2 26 WNA,ENA,SAM * 4C 21 2 42 SAF,ME,I * 74 31 3 14 WNA,ME,ENA * * * * 10 23 3 30 EA,ME,I * 4C 29 4 18 SAF,ME,I * * * * 10 21 5 6 EA,ME,I * * * * 10 29 5 38 EA,ME,I * 4C 1 6 42 SAF,ME,I * * * * 08 7 7 30 WNA,ENA,SAM * * * * 09 7 7 46 WNA,ENA,SAM * 10 25 8 18 EA,ME,I * * * * CA 18 8 34 SAF,SAM,ME * 74 4 9 38 WNA,ME,ENA * * * * 10 1 9 54 EA,ME,I * 10 14 10 10 EA,ME,I * * * * 74 24 11 30 WNA,ME,ENA,SAM * * * * CA 4 12 18 SAF,SAM,ME * * * * 74 10 12 34 WNA,ME,ENA * 10 18 12 50 EA,ME,I * 10 19 13 38 EA,ME,I * * * * 08 26 13 54 WNA,ENA,SAM * 09 26 14 10 WNA,ENA,SAM * * * * 4C 2 14 26 SAF,ME,I * 74 26 14 42 WNA,ME,ENA * 10 27 15 14 EA,ME,I * * * * CA 10 15 30 SAF,SAM,ME * 08 9 16 2 WNA,ENA,SAM * 10 2 16 18 EA,ME,I * * * * 74 9 16 34 WNA,ME,ENA,SAM * 08 23 16 50 WNA,ENA,SAM * 09 23 17 6 WNA,ENA,SAM * * * * 08 8 17 22 WNA,ENA,SAM * 10 7 17 38 EA,ME,I * 4C 26 17 54 SAF,ME * 08 29 19 30 WNA,ENA,SAM * * * * 10 4 19 46 EA,ME,I * CA 6 20 18 SAF,SAM,ME * * * * 10 24 20 50 EA,ME,I * * * * 74 25 22 10 WNA,ME,ENA,SAM * * * * 4C 30 23 10 SAF,ME,I * * * * 4C 17 23 26 SAF,ME,I * 74 22 23 42 WNA,ME,ENA * Schedule no 33 (1999 October 1) *** 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 08 3 0 50 E,WNA,SAM 08 3 0 50 E,ENA,SAM 10 6 0 18 E,ME,I 68 31 1 6 SAM,WNA 68 31 1 6 ENA,SAM 98 24 1 22 A,H 74 3 1 38 WNA,ME,E 74 3 1 38 ME,ENA,E 10 17 2 10 E,ME,I 08 31 2 26 E,WNA,SAM 08 31 2 26 E,ENA,SAM 98 9 2 58 A,I 32 13 2 42 H,WNA 32 13 2 42 ENA,H 10 23 3 30 E,ME,I 74 31 3 14 WNA,ME,E 74 31 3 14 ME,ENA,E 98 8 3 46 A,I 68 19 3 46 SAM 32 2 4 2 ENA,H 98 17 4 50 A,I 32 2 4 2 H,WNA 32 7 4 34 ENA,H 10 21 5 6 E,ME,I 32 7 4 34 H,WNA 68 27 5 6 ENA,SAM 98 5 5 22 A,H 68 27 5 6 SAM,WNA 68 2 6 26 ENA,SAM 10 29 5 38 E,ME,I 68 2 6 26 SAM,WNA 20 9 6 42 ENA,EA,H 20 9 6 42 ENA,WNA,H 20 9 6 42 EA,WNA,H 32 4 6 58 ENA,H,SAM 98 23 6 58 A 32 4 6 58 H,WNA,SAM 08 7 7 30 E,ENA,SAM 98 21 7 46 A,I 08 7 7 30 E,WNA,SAM 09 7 7 46 E,ENA,SAM 20 5 8 2 ENA,WNA,H 09 7 7 46 E,WNA,SAM 20 5 8 2 ENA,EA,H 10 25 8 18 E,ME,I 20 5 8 2 EA,WNA,H 32 5 9 6 ENA,H 98 6 8 34 A,H 32 5 9 6 H,WNA 20 30 9 22 ENA,EA,H 20 30 9 22 ENA,WNA,H 20 30 9 22 EA,WNA,H 74 4 9 38 ME,ENA,E 10 1 9 54 E,ME,I 74 4 9 38 WNA,ME,E 28 30 10 26 EA,H 10 14 10 10 E,ME,I 20 6 10 42 EA,WNA,H 20 6 10 42 ENA,EA,H 28 30 10 26 WNA,H 74 24 11 30 WNA,ME,E,SAM 74 24 11 30 ME,ENA,E,SAM 20 6 10 42 ENA,WNA,H 32 6 11 46 H,WNA 32 6 11 46 ENA,H 98 3 11 14 A,I 74 10 12 34 WNA,ME,E 74 10 12 34 ME,ENA,E 98 1 12 18 A,I 68 26 13 6 SAM 08 26 13 54 E,ENA,SAM 10 18 12 50 E,ME,I 08 26 13 54 E,WNA,SAM 09 26 14 10 E,ENA,SAM 10 19 13 38 E,ME,I 09 26 14 10 E,WNA,SAM 74 26 14 42 ME,ENA,E 98 15 14 26 A 74 26 14 42 WNA,ME,E 28 3 14 58 EA,H 28 3 14 58 WNA,H 68 17 15 46 SAM,WNA 68 17 15 46 ENA,SAM 10 27 15 14 E,ME,I 08 9 16 2 E,WNA,SAM 08 9 16 2 E,ENA,SAM 10 2 16 18 E,ME,I 74 9 16 34 WNA,ME,E,SAM 74 9 16 34 ME,ENA,E,SAM 98 19 16 34 A,I 08 23 16 50 E,WNA,SAM 08 23 16 50 E,ENA,SAM 3C 14 17 6 A,H 09 23 17 6 E,WNA,SAM 09 23 17 6 E,ENA,SAM 98 14 17 22 A,H 08 8 17 22 E,WNA,SAM 08 8 17 22 E,ENA,SAM 10 7 17 38 E,ME,I 20 15 18 10 EA,WNA,H 28 29 17 54 EA,H 28 29 17 54 WNA,H 74 8 18 26 WNA,ME 20 15 18 10 ENA,EA,H 20 15 18 10 ENA,WNA,H 68 21 18 58 SAM,WNA 74 8 18 26 ME,ENA 98 16 18 26 A 32 15 19 14 H,WNA 68 21 18 58 ENA,SAM 98 2 19 14 A,I 08 29 19 30 E,WNA,SAM 32 15 19 14 ENA,H 10 4 19 46 E,ME,I 20 14 20 2 EA,WNA,H 08 29 19 30 E,ENA,SAM 20 14 20 2 ENA,WNA,H 32 1 20 34 H,WNA 20 14 20 2 ENA,EA,H 98 18 20 18 A,H 68 22 21 6 SAM,WNA 32 1 20 34 ENA,H 10 24 20 50 E,ME,I 20 16 21 38 EA,WNA,H 68 22 21 6 ENA,SAM 3C 7 21 6 A,H 32 14 21 54 H,WNA 20 16 21 38 ENA,EA,H 98 7 21 22 A,H 74 25 22 10 WNA,ME,E,SAM 32 14 21 54 ENA,H 20 16 21 38 ENA,WNA,H 32 16 22 26 H,WNA 74 25 22 10 ME,ENA,E,SAM 98 13 21 54 A 20 18 23 10 EA,H 32 16 22 26 ENA,H 3C 13 22 42 A,H 68 1 23 26 SAM,WNA 68 1 23 26 ENA,SAM 20 18 23 10 ENA,H 74 22 23 42 WNA,ME,E 74 22 23 42 ME,ENA,E 98 4 23 42 A,H Schedule no 33 (1999 October 1) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 3C 4 0 18 A CC 9 0 2 SAF 10 6 0 18 E,EA,ME 3C 2 0 34 A 3C 4 0 18 H 4C 23 1 22 E,SAF,ME 98 24 1 22 EA,A 3C 2 0 34 H 10 17 2 10 E,EA,ME 3B 18 1 54 SAM CC 8 1 6 SAF 38 26 2 26 H 38 26 2 26 I 98 24 1 22 EA,H 4C 21 2 42 E,SAF,ME 32 13 2 42 ENA,WNA CC 30 2 26 SAF 98 9 2 58 EA,A 32 2 4 2 ENA,WNA 98 9 2 58 EA,I CC 6 3 14 A,SAF 3C 10 4 18 A CC 6 3 14 SAF,I 10 23 3 30 E,EA,ME 32 7 4 34 ENA,WNA CD 6 3 30 SAF 98 8 3 46 EA,A 3C 5 5 6 A 98 8 3 46 EA,I 4C 29 4 18 E,SAF,ME 98 5 5 22 EA,A 3C 10 4 18 H 98 17 4 50 EA,A 38 8 6 10 I 98 17 4 50 EA,I 10 21 5 6 E,EA,ME 20 9 6 42 ENA,EA,WNA 3C 5 5 6 H 10 29 5 38 E,EA,ME 32 4 6 58 ENA,WNA,SAM 98 5 5 22 EA,H 38 8 6 10 H 3C 6 7 30 A 98 23 6 58 EA 4C 1 6 42 E,SAF,ME 20 5 8 2 ENA,EA,WNA CC 22 7 14 SAF A4 1 6 58 SAF,ME 98 6 8 34 EA,A 3C 6 7 30 H 98 21 7 46 EA,A 32 5 9 6 ENA,WNA 98 21 7 46 EA,I 10 25 8 18 E,EA,ME 20 30 9 22 ENA,EA,WNA CC 3 8 18 SAF 38 25 9 38 H 38 25 9 38 I 98 6 8 34 EA,H 10 1 9 54 E,EA,ME 28 30 10 26 WNA,EA CC 31 10 10 SAF 10 14 10 10 E,EA,ME 20 6 10 42 ENA,EA,WNA 98 3 11 14 EA,I 98 3 11 14 EA,A 38 22 11 30 I CC 15 11 30 SAF 38 22 11 30 H 32 6 11 46 ENA,WNA 98 1 12 18 EA,I 98 1 12 18 EA,A 38 3 13 22 I CC 14 13 22 SAF 10 18 12 50 E,EA,ME 3B 6 13 38 SAM CD 14 13 38 SAF 38 3 13 22 H 38 31 14 42 I 98 15 14 26 EA 10 19 13 38 E,EA,ME 28 3 14 58 WNA,EA CC 16 14 58 SAF A4 2 13 54 SAF,ME 38 15 15 46 I CC 18 15 46 SAF 4C 2 14 26 E,SAF,ME 3C 14 17 6 A,EA 98 19 16 34 EA,I 38 31 14 42 H 98 14 17 22 EA,A 3C 14 17 6 H,EA 10 27 15 14 E,EA,ME 28 29 17 54 WNA,EA 98 14 17 22 EA,H 38 15 15 46 H 20 15 18 10 ENA,EA,WNA 98 16 18 26 EA A4 13 16 2 SAF,ME 3B 25 18 26 SAM CC 13 18 42 SAF 10 2 16 18 E,EA,ME 32 15 19 14 ENA,WNA CD 13 18 58 SAF 98 19 16 34 EA,A 20 14 20 2 ENA,EA,WNA 98 2 19 14 EA,I 10 7 17 38 E,EA,ME 98 18 20 18 EA,A CC 10 19 46 SAF 98 2 19 14 EA,A 32 1 20 34 ENA,WNA CD 10 20 2 SAF 10 4 19 46 E,EA,ME 3C 7 21 6 A,EA 98 18 20 18 EA,H 10 24 20 50 E,EA,ME 98 7 21 22 EA,A 3C 7 21 6 H,EA 4C 30 23 10 E,SAF,ME 20 16 21 38 ENA,EA,WNA 98 7 21 22 EA,H 4C 17 23 26 E,SAF,ME 32 14 21 54 ENA,WNA CC 26 21 38 SAF A4 30 23 42 SAF 32 16 22 26 ENA,WNA 98 13 21 54 EA 3C 13 22 42 A,EA 3C 13 22 42 H,EA 20 18 23 10 ENA,EA 98 4 23 42 EA,H 98 4 23 42 EA,A Schedule no 33 (1999 October 1) *** 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 6 0 18 E,EA,I CC 9 0 2 A CA 25 0 34 SAF,E 4C 23 1 22 E,SAF,I CA 25 0 34 SAM,E 08 3 0 50 E,WNA,ENA 74 3 1 38 WNA,ENA,E CC 8 1 6 A 68 31 1 6 ENA,WNA 10 17 2 10 E,EA,I 4C 23 1 22 E,ME,I 3B 18 1 54 H 4C 21 2 42 E,SAF,I CC 30 2 26 A 08 31 2 26 E,WNA,ENA 74 31 3 14 WNA,ENA,E 4C 21 2 42 E,ME,I CA 1 2 58 SAF 10 23 3 30 E,EA,I CA 1 2 58 SAM 68 19 3 46 ENA 4C 29 4 18 E,SAF,I CC 6 3 14 A,I CA 14 4 2 SAF 10 21 5 6 E,EA,I CD 6 3 30 A 68 27 5 6 ENA,WNA 10 29 5 38 E,EA,I CA 14 4 2 SAM C2 14 6 10 ME C2 14 6 10 SAM 4C 29 4 18 E,ME,I 68 2 6 26 ENA,WNA 4C 1 6 42 E,SAF,I 4C 1 6 42 E,ME,I 32 4 6 58 ENA,H,WNA A4 1 6 58 I,SAF A4 1 6 58 I,ME 08 7 7 30 E,WNA,ENA 10 25 8 18 E,EA,I CC 22 7 14 A 09 7 7 46 E,WNA,ENA CA 18 8 34 SAF,SAM,E CA 19 8 2 SAM CA 19 8 2 SAF C2 18 8 50 SAM CC 3 8 18 A CA 18 8 34 SAF,E,ME 74 4 9 38 WNA,ENA,E CA 18 8 34 SAM,E,ME C2 18 8 50 ME 10 1 9 54 E,EA,I CC 31 10 10 A CA 2 10 26 SAF 10 14 10 10 E,EA,I CA 2 10 26 SAM 74 24 11 30 WNA,ME,ENA,E 74 24 11 30 WNA,ENA,E,SAMCC 15 11 30 A CA 7 11 46 SAF C2 4 12 2 SAM,SAF CA 7 11 46 SAM C2 4 12 2 ME,SAF CA 4 12 18 SAF,SAM,E C2 4 12 2 ME,SAM CA 4 12 18 SAF,E,ME 74 10 12 34 WNA,ENA,E CA 4 12 18 SAM,E,ME 68 26 13 6 ENA 10 18 12 50 E,EA,I CC 14 13 22 A 3B 6 13 38 H 10 19 13 38 E,EA,I CD 14 13 38 A 08 26 13 54 E,WNA,ENA A4 2 13 54 I,SAF A4 2 13 54 I,ME 09 26 14 10 E,WNA,ENA 4C 2 14 26 E,SAF,I 4C 2 14 26 E,ME,I C2 10 14 58 ME 74 26 14 42 WNA,ENA,E CC 16 14 58 A CA 10 15 30 SAF,E,ME C2 10 14 58 SAM CA 10 15 30 SAM,E,ME 68 17 15 46 ENA,WNA 10 27 15 14 E,EA,I CC 18 15 46 A 08 9 16 2 E,WNA,ENA CA 10 15 30 SAF,SAM,E A4 13 16 2 I,ME 74 9 16 34 WNA,ME,ENA,E A4 13 16 2 I,SAF 4C 26 17 54 E,ME 08 23 16 50 E,WNA,ENA 10 2 16 18 E,EA,I CC 13 18 42 A 09 23 17 6 E,WNA,ENA 74 9 16 34 WNA,ENA,E,SAMCD 13 18 58 A 08 8 17 22 E,WNA,ENA 10 7 17 38 E,EA,I CC 10 19 46 A 3B 25 18 26 H 4C 26 17 54 E,SAF CD 10 20 2 A 68 21 18 58 ENA,WNA 74 8 18 26 WNA,ENA CA 6 20 18 SAM,E,ME 08 29 19 30 E,WNA,ENA 10 4 19 46 E,EA,I CC 26 21 38 A CA 6 20 18 SAF,E,ME CA 6 20 18 SAF,SAM,E 4C 30 23 10 E,ME,I 68 22 21 6 ENA,WNA 10 24 20 50 E,EA,I 4C 17 23 26 E,ME,I 74 25 22 10 WNA,ME,ENA,E 74 25 22 10 WNA,ENA,E,SAMA4 30 23 42 I C2 25 22 42 ME C2 25 22 42 SAM 68 1 23 26 ENA,WNA 4C 30 23 10 E,SAF,I 4C 17 23 26 E,SAF,I 74 22 23 42 WNA,ENA,E