16 March 1999 GP/GPSW.359 Dear Colleagues, Please find enclosed the tracking schedule No 32 for international time and frequency comparisons by GPS common views. The schedule should be implemented, as given in the following pages, on MJD=51267 (30 March 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 193.104.126.5, 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 30 March 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 In the future when all one- channel receivers will be withdrawn from operation, the use of a fixed reference date for ‘all- in-view’ observations by multichannel receivers will permit to cease publication of the common-view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 32 is the seventh 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 PRN 10 at 00 h 10 should be entered in the receiver as starting at 00 h 08. 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, Gerard Petit Responsable par interim, section du temps 16 March 1999 To European Time Laboratories GP/GPSW.360 Dear Colleagues, As for the previous schedules, we have subdivided the European tracking schedule into four sub-schedules as follows: . sub-schedule E1 (22 tracks) is optimized for internal European links, with a diversity of satellites observed with high elevation; . sub-schedule E2 (34 tracks) includes E1 with addition of specific common views between Europe and North America; . sub-schedule E3 (28 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, Gerard Petit Reponsable par interim, section du temps *************************************************************************** * GPS Schedule no 32 * * for implementation on MJD = 51267 (1999 March 30) 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, 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 10, 1997). 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 32 (30 March 1999) *** Europe *** Class PRN Start Connects Subschedules h m E1 E2 E3 E4 08 10 0 10 WNA,ENA * 4C 27 0 26 SAF,ME,SAM * 4C 4 0 42 SAF,ME,SAM * 74 10 0 58 WNA,ME,ENA * * * * 10 18 1 14 EA,ME,I * 10 19 2 2 EA,ME,I * * * * 10 11 2 18 EA,ME,I * 74 26 3 38 WNA,ME,ENA * * * * 10 27 3 54 EA,ME,I * * * * 4C 10 4 10 SAF,ME,SAM * 08 9 4 42 WNA,ENA,SAM * 4C 7 4 58 SAF,ME,I * 74 9 5 14 WNA,ME,ENA,SAM * * * * 10 2 5 30 EA,ME,I * * * * 08 23 5 46 WNA,ENA,SAM * 08 8 6 2 WNA,ENA,SAM * 10 7 6 18 EA,ME,I * * * * 74 8 6 50 WNA,ME,ENA * 08 29 8 26 WNA,ENA,SAM * 4C 6 8 58 SAF,ME,SAM * 4C 8 9 30 SAF,ME,I * * * * 10 24 9 46 EA,ME,I * 11 24 10 2 EA,ME,I * * * * 08 22 11 50 WNA,ENA * 4C 30 12 6 SAF,ME,I * * * * 74 22 12 22 WNA,ME,ENA * * * * 4C 25 12 38 SAF,ME,SAM * 10 6 12 54 EA,ME,I * * * * 08 3 13 26 WNA,ENA,SAM * 74 3 14 14 WNA,ME,ENA * * * * 10 17 14 46 EA,ME,I * * * * 4C 21 15 2 SAF,ME,I * * * * 4C 22 15 18 SAF,ME,SAM * 74 31 15 50 WNA,ME,ENA * * * * 10 23 16 6 EA,ME,I * * * * 08 15 16 54 WNA,ENA,SAM * 74 15 17 26 WNA,ME,ENA,SAM * * * * 10 21 17 42 EA,ME,I * 4C 1 17 58 SAF,ME,I * * * * 4C 31 18 14 SAF,ME * 10 29 18 30 EA,ME,I * * * * 11 29 18 46 EA,ME,I * 10 1 19 18 EA,ME,I * 08 7 20 22 WNA,ENA,SAM * 4C 18 21 10 SAF,ME,SAM * * * * 08 4 21 42 WNA,ENA * 74 4 22 14 WNA,ME,ENA * * * * 08 24 23 34 WNA,ENA * Schedule no 32 (30 March 1999) *** 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 10 0 10 E,WNA 08 10 0 10 E,ENA 98 3 0 10 A,I 74 10 0 58 WNA,ME,E 74 10 0 58 ME,E,ENA 3C 25 0 42 A,H 32 17 2 2 H,WNA 32 17 2 2 ENA,H 10 18 1 14 E,ME,I 32 23 3 6 H,WNA 32 23 3 6 ENA,H 10 19 2 2 E,ME,I 74 26 3 38 WNA,ME,E 74 26 3 38 ME,E,ENA 10 11 2 18 E,ME,I 68 9 4 26 SAM 08 9 4 42 E,ENA,SAM 98 15 3 22 A 08 9 4 42 E,WNA,SAM 68 17 4 58 ENA,SAM 10 27 3 54 E,ME,I 68 17 4 58 SAM,WNA 74 9 5 14 ME,E,ENA,SAM 98 19 5 14 A,I 74 9 5 14 WNA,ME,E,SAM 32 21 5 30 ENA,H 10 2 5 30 E,ME,I 32 21 5 30 H,WNA 08 23 5 46 E,ENA,SAM 36 15 5 46 H,I 08 23 5 46 E,WNA,SAM 08 8 6 2 E,ENA,SAM 98 14 6 2 A,H 08 8 6 2 E,WNA,SAM 32 29 6 34 ENA,H 10 7 6 18 E,ME,I 32 29 6 34 H,WNA 74 8 6 50 ME,E,ENA 98 16 6 50 A 74 8 6 50 WNA,ME,E 20 15 7 6 ENA,EA,H 20 15 7 6 ENA,WNA,H 20 15 7 6 EA,WNA,H 68 21 7 22 ENA,SAM 98 2 8 10 A,I 68 21 7 22 SAM,WNA 08 29 8 26 E,ENA,SAM 28 14 8 42 WNA 08 29 8 26 E,WNA,SAM 28 14 8 42 EA 98 18 8 58 A,H 20 14 9 14 EA,WNA,H 20 14 9 14 ENA,EA,H 20 14 9 14 ENA,WNA,H 68 1 10 2 SAM 74 25 10 18 ME 10 24 9 46 E,ME,I 20 16 10 18 EA,H 08 22 11 50 E,ENA 11 24 10 2 E,ME,I 08 22 11 50 E,WNA 74 22 12 22 ME,E,ENA 20 16 10 18 ENA,H 74 22 12 22 WNA,ME,E 32 18 12 54 ENA,H 98 13 10 34 A 32 18 12 54 H,WNA 32 19 13 10 ENA,H 98 4 12 38 A,H 32 19 13 10 H,WNA 08 3 13 26 E,ENA,SAM 10 6 12 54 E,ME,I 08 3 13 26 E,WNA,SAM 20 13 13 58 ENA,EA,H 98 24 13 42 A,H 20 13 13 58 EA,WNA,H 74 3 14 14 ME,E,ENA 20 13 13 58 ENA,WNA,H 74 3 14 14 WNA,ME,E 20 27 14 30 ENA,EA,H 20 27 14 30 ENA,WNA,H 20 27 14 30 EA,WNA,H 32 27 15 18 ENA,H 10 17 14 46 E,ME,I 32 27 15 18 H,WNA 18 31 15 34 ENA,ME 98 9 15 18 A 18 31 15 34 WNA,ME 74 31 15 50 ME,E,ENA 10 23 16 6 E,ME,I 74 31 15 50 WNA,ME,E 68 19 16 22 ENA,SAM 98 8 16 22 A,I 68 15 16 6 SAM 08 15 16 54 E,ENA,SAM 98 17 17 26 A,I 68 19 16 22 SAM,WNA 74 15 17 26 ME,E,ENA,SAM 10 21 17 42 E,ME,I 08 15 16 54 E,WNA,SAM 28 9 18 14 EA,H 98 5 17 58 A,H 74 15 17 26 WNA,ME,E,SAM 20 9 19 2 ENA,EA,H 28 9 18 14 WNA,H 20 9 19 2 EA,WNA,H 68 2 19 18 ENA,SAM 10 29 18 30 E,ME,I 68 2 19 18 SAM,WNA 28 8 19 50 EA 11 29 18 46 E,ME,I 08 7 20 22 E,WNA,SAM 28 5 20 6 EA,H 20 9 19 2 ENA,WNA,H 20 5 20 38 EA,WNA,H 08 7 20 22 E,ENA,SAM 10 1 19 18 E,ME,I 68 7 20 54 SAM 20 5 20 38 ENA,EA,H 98 23 19 34 A 32 24 21 26 H,WNA 32 24 21 26 ENA,H 28 8 19 50 WNA 08 4 21 42 E,WNA 08 4 21 42 E,ENA 28 5 20 6 WNA,H 20 30 21 58 EA,WNA,H 20 30 21 58 ENA,EA,H 98 21 20 22 A,I 74 4 22 14 WNA,ME,E 74 4 22 14 ME,E,ENA 20 5 20 38 ENA,WNA,H 68 10 22 30 SAM,WNA 68 10 22 30 ENA,SAM 98 6 20 54 A,H 32 30 23 2 H,WNA 32 30 23 2 ENA,H 20 30 21 58 ENA,WNA,H 20 6 23 18 EA,WNA,H 20 6 23 18 ENA,EA,H 98 1 22 46 A 08 24 23 34 E,WNA 08 24 23 34 E,ENA 20 6 23 18 ENA,WNA,H Schedule no 32 (30 March 1999) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 38 22 0 26 I 98 3 0 10 EA,I 98 3 0 10 EA,A 3C 25 0 42 A,EA 3C 25 0 42 H,EA 38 22 0 26 H 3C 21 1 30 A 3C 21 1 30 H 10 18 1 14 E,EA,ME 32 17 2 2 ENA,WNA CC 14 2 2 SAF 10 19 2 2 E,EA,ME 32 23 3 6 ENA,WNA CD 14 2 18 SAF 10 11 2 18 E,EA,ME 3C 22 3 54 A 98 15 3 22 EA 10 27 3 54 E,EA,ME 32 21 5 30 ENA,WNA CC 16 3 38 SAF AC 15 4 10 A 36 15 5 46 EA,I 3C 22 3 54 H 4C 7 4 58 E,SAF,ME 98 14 6 2 EA,A AC 15 4 10 I 98 19 5 14 EA,A 3C 14 6 18 A CC 18 4 26 SAF 10 2 5 30 E,EA,ME 32 29 6 34 ENA,WNA 98 19 5 14 EA,I 36 15 5 46 EA,H 54 25 6 50 SAM F9 16 5 30 A 10 7 6 18 E,EA,ME 20 15 7 6 ENA,EA,WNA 98 14 6 2 EA,H A4 24 7 38 SAF,ME 3C 31 7 38 A 3C 14 6 18 H 98 2 8 10 EA,A 3C 18 8 42 A 98 16 6 50 EA 4C 8 9 30 E,SAF,ME 98 18 8 58 EA,A CC 13 7 6 SAF 10 24 9 46 E,EA,ME 20 14 9 14 ENA,EA,WNA CD 13 7 22 SAF 11 24 10 2 E,EA,ME 3C 19 10 2 A 3C 31 7 38 H A4 30 11 50 SAF,ME 20 16 10 18 ENA,EA CC 10 7 54 SAF 4C 30 12 6 E,SAF,ME 3C 27 11 50 A 98 2 8 10 EA,I 38 24 12 22 H 38 24 12 22 I CD 10 8 26 SAF 10 6 12 54 E,EA,ME 98 4 12 38 EA,A 3C 18 8 42 H A4 23 13 10 SAF,ME 32 18 12 54 ENA,WNA 98 18 8 58 EA,H A4 21 14 30 SAF,ME 32 19 13 10 ENA,WNA 3C 19 10 2 H 10 17 14 46 E,EA,ME 98 24 13 42 EA,A 98 13 10 34 EA 4C 21 15 2 E,SAF,ME 20 13 13 58 ENA,EA,WNA CC 26 10 50 SAF 38 26 15 34 H 54 18 14 14 SAM 3C 27 11 50 H 10 23 16 6 E,EA,ME 20 27 14 30 ENA,EA,WNA CC 9 12 22 SAF 98 8 16 22 EA,A 32 27 15 18 ENA,WNA 98 4 12 38 EA,H AC 8 16 38 A 38 26 15 34 I CC 5 13 26 SAF A4 29 16 54 SAF,ME 98 5 17 58 EA,A 98 24 13 42 EA,H 98 17 17 26 EA,A 28 9 18 14 WNA,EA CC 8 13 58 SAF 10 21 17 42 E,EA,ME 20 9 19 2 ENA,EA,WNA 98 9 15 18 EA 4C 1 17 58 E,SAF,ME 54 4 19 34 SAM CC 6 15 50 SAF 10 29 18 30 E,EA,ME 3C 26 19 50 A CD 6 16 6 SAF 11 29 18 46 E,EA,ME 28 5 20 6 WNA,EA 98 8 16 22 EA,I 10 1 19 18 E,EA,ME 20 5 20 38 ENA,EA,WNA AC 8 16 38 I 98 21 20 22 EA,A 98 6 20 54 EA,A 98 17 17 26 EA,I 38 29 21 10 H 38 29 21 10 I 98 5 17 58 EA,H 38 25 22 14 H 32 24 21 26 ENA,WNA CC 22 19 18 SAF A4 19 23 34 SAF,ME 20 30 21 58 ENA,EA,WNA 98 23 19 34 EA AC 3 23 50 A 38 25 22 14 I 3C 26 19 50 H 32 30 23 2 ENA,WNA 98 21 20 22 EA,I 20 6 23 18 ENA,EA,WNA CC 3 20 38 SAF 98 6 20 54 EA,H CC 31 22 30 SAF 98 1 22 46 EA AC 3 23 50 I Schedule no 32 (30 March 1999) *** Middle East *** *** South Africa *** *** South America *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 4C 27 0 26 E,SAF,SAM 4C 27 0 26 E,ME,SAM 4C 27 0 26 E,SAF,ME 4C 4 0 42 E,SAF,SAM 4C 4 0 42 E,ME,SAM 4C 4 0 42 E,SAF,ME 74 10 0 58 WNA,E,ENA CC 14 2 2 A 4C 10 4 10 E,SAF,ME 10 18 1 14 E,EA,I CD 14 2 18 A 68 9 4 26 ENA 10 19 2 2 E,EA,I CC 16 3 38 A 08 9 4 42 E,WNA,ENA 10 11 2 18 E,EA,I 4C 10 4 10 E,ME,SAM 68 17 4 58 ENA,WNA 74 26 3 38 WNA,E,ENA CC 18 4 26 A 74 9 5 14 WNA,ME,E,ENA 10 27 3 54 E,EA,I 4C 7 4 58 E,ME,I 08 23 5 46 E,WNA,ENA 4C 10 4 10 E,SAF,SAM CC 13 7 6 A 08 8 6 2 E,WNA,ENA 4C 7 4 58 E,SAF,I CD 13 7 22 A 54 25 6 50 H 74 9 5 14 WNA,E,ENA,SAM A4 24 7 38 I,ME 68 21 7 22 ENA,WNA 10 2 5 30 E,EA,I CC 10 7 54 A 08 29 8 26 E,WNA,ENA 10 7 6 18 E,EA,I CD 10 8 26 A 4C 6 8 58 E,SAF,ME 74 8 6 50 WNA,E,ENA 4C 6 8 58 E,ME,SAM 68 1 10 2 ENA A4 24 7 38 SAF,I 4C 8 9 30 E,ME,I 4C 25 12 38 E,SAF,ME 4C 6 8 58 E,SAF,SAM CC 26 10 50 A 08 3 13 26 E,WNA,ENA 4C 8 9 30 E,SAF,I A4 30 11 50 I,ME 54 18 14 14 H 10 24 9 46 E,EA,I 4C 30 12 6 E,ME,I 4C 22 15 18 E,SAF,ME 11 24 10 2 E,EA,I CC 9 12 22 A 68 15 16 6 ENA 74 25 10 18 WNA 4C 25 12 38 E,ME,SAM 68 19 16 22 ENA,WNA A4 30 11 50 SAF,I A4 23 13 10 I,ME 08 15 16 54 E,WNA,ENA 4C 30 12 6 E,SAF,I CC 5 13 26 A 74 15 17 26 WNA,ME,E,ENA 74 22 12 22 WNA,E,ENA CC 8 13 58 A C2 14 19 2 ME 4C 25 12 38 E,SAF,SAM A4 21 14 30 I,ME 68 2 19 18 ENA,WNA 10 6 12 54 E,EA,I 4C 21 15 2 E,ME,I 54 4 19 34 H A4 23 13 10 SAF,I 4C 22 15 18 E,ME,SAM 08 7 20 22 E,WNA,ENA 74 3 14 14 WNA,E,ENA CC 6 15 50 A C2 16 20 38 ME A4 21 14 30 SAF,I CD 6 16 6 A 68 7 20 54 ENA 10 17 14 46 E,EA,I A4 29 16 54 I,ME 4C 18 21 10 E,SAF,ME 4C 21 15 2 E,SAF,I 4C 1 17 58 E,ME,I C2 18 21 26 ME,SAF 4C 22 15 18 E,SAF,SAM 4C 31 18 14 E,ME 68 10 22 30 ENA,WNA 18 31 15 34 WNA,ENA CC 22 19 18 A 74 31 15 50 WNA,E,ENA CC 3 20 38 A 10 23 16 6 E,EA,I 4C 18 21 10 E,ME,SAM A4 29 16 54 SAF,I C2 18 21 26 ME,SAM 74 15 17 26 WNA,E,ENA,SAM CC 31 22 30 A 10 21 17 42 E,EA,I A4 19 23 34 I,ME 4C 1 17 58 E,SAF,I 4C 31 18 14 E,SAF 10 29 18 30 E,EA,I 11 29 18 46 E,EA,I C2 14 19 2 SAM 10 1 19 18 E,EA,I C2 16 20 38 SAM 4C 18 21 10 E,SAF,SAM C2 18 21 26 SAM,SAF 74 4 22 14 WNA,E,ENA A4 19 23 34 SAF,I