24 October 2008 FA/GPSW.402 Dear Colleagues, Please find enclosed tracking schedule No. 51 for international time and frequency comparisons by GPS common-view single-channel receivers. Computation of this schedule is fully automated. It follows that all areas have an equal number of tracks (48). The enclosed schedule should be implemented on MJD 54770 (31 October 2008) 00h00 UTC. The GPS tracking schedules continue to be sent to regular users by e-mail and are also available by anonymous FTP (ftp2.bipm.org, node 62.161.69.5, subdirectory pub\tai\publication) and on the BIPM website (http://www.bipm.org). The track times given in this schedule are the start times for the 13 minute standard tracks. Because a period of about 2 minutes is usually required to lock the receiver onto the satellite signal, this delay must be subtracted from the given track time. It follows that if you operate an ‘NBS-type’ receiver, for instance TTR 5, TTR 5A, TTR 6 or TTR 6A from AOA, you must modify the given track time: for example, the European schedule of PRN 08 at 00h06 should be entered in the AOA receivers at 00h04. For TTR 6 users a utility software (TTR6SCHLOAD) to upload correctly the schedule in the receiver can be found in the FTP server (ftp2.bipm.org, node 62.161.69.5, subdirectory pub\tai\data). This tracking schedule conforms with the technical directives for standardization drawn up by the CCTF Group on Global navigation satellite systems Time Transfer Standards (CGGTTS). Please feel free to contact us if there are questions, suggestions or comments regarding the enclosed documents. Yours sincerely, E. Felicitas Arias Head, Time frequency and gravimetry section Note for multi-channel receivers Multi-channel receivers do not need to implement the new schedules if they refer track times to MJD 50722 (1 October 1997), the reference date of GPS schedule No. 29. As schedules for single-channel receivers always refer to this date, compatibility between multi- channel and single-channel observations is maintained. In the future, when all single-channel receivers are withdrawn from operation, the use of a fixed reference date for multi-channel receivers will allow us to cease publication of this common-view schedule. ***************************************************************************** * GPS Schedule no 51 * * for implementation on MJD 54770 (31 October 2008) 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, BIM, BY, CAO, CH, DLR, DTAG, EIM, IFAG, IPQ*, IT, JV, LDS, LT, LV, Mad*, MIKE, MKEH, NIMB, NPL, OB*, OCA*, OP, ORB, PL, PTB, RAAI*, RIRT*, ROA, SIQ, SMU, SP, SU, TP, UA*, UME, VSL, ZMDM East North America ENA AO*, APL, NRC, NRL, USNO West North America WNA AMC*, CNM, CNMP, Gold*, NIST, WWV* Hawaii H WWVH* East Asia EA BIRM, HKO, JATC, KIM, KRIS, NAO, NICT, NIM, NIMT, NMIJ, NMLS, NTSC, SCL, SG, TL, VMI Australia and New Zealand A AUS, Can*, MSL India I NPLI Middle East ME INPL, NIS South Africa SAF ZA South America SAM IGMA, Kou*, ONBA, ONRJ, TCC Laboratories participating in TAI are designated by their usual acronyms (see Table 3 of the BIPM Annual Report on time activities, Volume 1, 2006); other laboratories are indicated by an asterisk. * AMC : USNO Alternate Master Clock, Colorado. AO : Arecibo Observatory. IPQ : Instituto Português da Qualidade, Monte de Caparica, Portugal. Kou : CNES Kourou Center. Mad, Gold, Can : JPL Deep Space Network, Madrid, Goldstone, Canberra. OCA : Observatoire de la Cote d'Azur, Grasse, France. OB : Observatoire de Besançon, Besançon, France. RIRT : Russian Institute of Radionavigation and Time, Saint Petersburg. RAAI : Romanian Academy Astronomical Institute, Bucarest. UA : National Science Center "Institute of Metrology", Kharkov - Ukraine. WWV, WWVH : NIST stations in Colorado and Hawaii. 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 class bytes are such that in association with the satellite number they form a unique identifyer for each common view. GPS Schedule no 51 (31 October 2008) *** Europe *** Class PRN Start Connects h m A0 23 0 6 ME,I,EA A1 23 0 38 ME,I,EA A0 13 0 54 ME,I,EA A1 13 1 10 ME,I,EA A0 25 1 26 ME,I,EA A2 13 1 42 ME,I,EA 74 10 1 58 WNA,ME,ENA A0 07 2 30 ME,I,EA A1 07 2 46 ME,I,EA A0 27 3 18 ME,I,EA 74 26 3 34 WNA,ME,ENA BC 10 3 50 SAF,ME,SAM A0 08 4 22 ME,I,EA 18 09 5 26 WNA,ENA,SAM A0 28 5 42 ME,I,EA 18 18 5 58 WNA,ENA,SAM 74 09 6 14 WNA,ME,ENA 19 18 6 30 WNA,ENA,SAM 1A 18 6 46 WNA,ENA,SAM 18 14 9 10 WNA,ENA,SAM 19 14 9 26 WNA,ENA,SAM BC 09 9 42 SAF,ME,I 74 31 11 18 WNA,ME,ENA BC 24 11 50 SAF,ME,I BC 30 12 6 SAF,ME,I BD 30 12 22 SAF,ME,I D4 30 12 38 SAF,ME,I D5 30 12 54 SAF,ME,I 74 16 13 10 WNA,ME,ENA A0 24 13 26 ME,I,EA 18 06 14 14 WNA,ENA,SAM 18 03 14 30 WNA,ENA,SAM 19 03 14 46 WNA,ENA,SAM 18 19 15 18 WNA,ENA,SAM 19 19 15 34 WNA,ENA,SAM A0 21 15 50 ME,I,EA BC 16 16 6 SAF,ME,SAM A0 18 16 22 ME,I,EA BC 06 17 22 SAF,ME,I A0 22 17 54 ME,I,EA 18 11 18 10 WNA,ENA,SAM 74 11 18 26 WNA,ME,ENA BC 23 20 50 SAF,ME,SAM BD 23 21 6 SAF,ME,SAM BC 13 21 38 SAF,ME,SAM D4 13 22 10 SAF,ME,SAM 74 04 22 42 WNA,ME,ENA 75 04 22 58 WNA,ME,ENA GPS Schedule no 51 (31 October 2008) *** 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 18 10 0 6 WNA,SAM 18 10 0 6 ENA,SAM A0 23 0 6 ME,I,E 34 29 0 22 WNA,H 34 29 0 22 H,ENA AC 06 0 22 I,A 68 26 1 26 SAM 74 10 1 58 ME,ENA,E A1 23 0 38 ME,I,E 74 10 1 58 WNA,ME,E 35 29 2 30 H,ENA,SAM A0 13 0 54 ME,I,E 35 29 2 30 WNA,H,SAM D4 29 2 46 H,ENA,SAM A1 13 1 10 ME,I,E D4 29 2 46 WNA,H,SAM 74 26 3 34 ME,ENA,E A0 25 1 26 ME,I,E 74 26 3 34 WNA,ME,E 80 16 3 50 A,H,EA A2 13 1 42 ME,I,E 18 09 5 26 WNA,E,SAM 18 09 5 26 ENA,E,SAM AC 19 1 58 I,A 18 18 5 58 WNA,E,SAM 18 18 5 58 ENA,E,SAM A0 07 2 30 ME,I,E 74 09 6 14 WNA,ME,E 74 09 6 14 ME,ENA,E A1 07 2 46 ME,I,E 19 18 6 30 WNA,E,SAM 19 18 6 30 ENA,E,SAM A0 27 3 18 ME,I,E 1A 18 6 46 WNA,E,SAM 1A 18 6 46 ENA,E,SAM 80 16 3 50 WNA,A,H 34 31 7 34 WNA,H,SAM 34 31 7 34 H,ENA,SAM A0 08 4 22 ME,I,E 35 31 7 50 WNA,H,SAM 35 31 7 50 H,ENA,SAM 38 19 4 38 I,H 34 32 8 38 WNA,H,EA 34 32 8 38 H,EA,ENA A0 28 5 42 ME,I,E 35 32 8 54 WNA,H,EA 35 32 8 54 H,EA,ENA 3C 20 6 46 A,H 18 14 9 10 WNA,E,SAM 18 14 9 10 ENA,E,SAM 3D 20 7 18 A,H 19 14 9 26 WNA,E,SAM 19 14 9 26 ENA,E,SAM 34 32 8 38 WNA,H,ENA 34 20 9 42 WNA,H,EA 34 20 9 42 H,EA,ENA 35 32 8 54 WNA,H,ENA 34 23 11 2 WNA,H,EA 34 23 11 2 H,EA,ENA 34 20 9 42 WNA,H,ENA 74 31 11 18 WNA,ME,E 74 31 11 18 ME,ENA,E 3C 13 9 58 A,H D4 32 11 50 WNA,H,SAM D4 32 11 50 H,ENA,SAM 3C 17 10 30 A,H 34 13 12 6 WNA,H,EA 34 13 12 6 H,EA,ENA 34 23 11 2 WNA,H,ENA 35 13 12 22 WNA,H,EA 35 13 12 22 H,EA,ENA 34 13 12 6 WNA,H,ENA 74 16 13 10 WNA,ME,E 74 16 13 10 ME,ENA,E 35 13 12 22 WNA,H,ENA 35 23 13 26 WNA,H,SAM 35 23 13 26 H,ENA,SAM AC 26 13 10 I,A 34 27 13 42 WNA,H,EA 34 27 13 42 H,EA,ENA A0 24 13 26 ME,I,E 35 27 13 58 WNA,H,EA 35 27 13 58 H,EA,ENA 34 27 13 42 WNA,H,ENA 18 06 14 14 WNA,E,SAM 18 06 14 14 ENA,E,SAM 35 27 13 58 WNA,H,ENA 18 03 14 30 WNA,E,SAM 18 03 14 30 ENA,E,SAM 3C 02 14 14 A,H 19 03 14 46 WNA,E,SAM 19 03 14 46 ENA,E,SAM 34 08 15 2 WNA,H,ENA 34 08 15 2 WNA,H,EA 34 08 15 2 H,EA,ENA A0 21 15 50 ME,I,E 18 19 15 18 WNA,E,SAM 18 19 15 18 ENA,E,SAM AC 09 16 6 I,A 19 19 15 34 WNA,E,SAM 19 19 15 34 ENA,E,SAM A0 18 16 22 ME,I,E 18 27 17 38 WNA,SAM 18 27 17 38 ENA,SAM AD 09 16 38 I,A 18 11 18 10 WNA,E,SAM 18 11 18 10 ENA,E,SAM A0 22 17 54 ME,I,E 74 11 18 26 WNA,ME,E 74 11 18 26 ME,ENA,E 3C 12 18 10 A,H 34 04 19 30 WNA,H,SAM 34 04 19 30 H,ENA,SAM 3D 12 18 26 A,H 35 04 19 46 WNA,H,SAM 35 04 19 46 H,ENA,SAM 3C 05 18 58 A,H D4 04 20 2 WNA,H,SAM D4 04 20 2 H,ENA,SAM BC 31 19 46 SAF,ME,I 34 12 21 6 WNA,H,EA 34 12 21 6 H,EA,ENA AC 22 20 34 I,A 35 12 21 22 WNA,H,EA 35 12 21 22 H,EA,ENA AD 22 20 50 I,A 34 02 21 38 WNA,H 34 02 21 38 H,ENA 34 12 21 6 WNA,H,ENA 34 05 21 54 WNA,H,EA 34 05 21 54 H,EA,ENA 35 12 21 22 WNA,H,ENA D4 12 22 26 WNA,H D4 12 22 26 H,ENA 34 05 21 54 WNA,H,ENA 74 04 22 42 WNA,ME,E 74 04 22 42 ME,ENA,E AC 14 22 10 I,A,H 75 04 22 58 WNA,ME,E 75 04 22 58 ME,ENA,E BC 32 23 30 SAF,ME,I D5 29 23 46 WNA,H,EA D5 29 23 46 H,EA,ENA D5 29 23 46 WNA,H,ENA GPS Schedule no 51 (31 October 2008) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 34 29 0 22 WNA,ENA AC 06 0 22 I,EA A0 23 0 6 ME,EA,E 3C 31 1 42 A CC 11 1 10 SAF AC 06 0 22 A,EA 35 29 2 30 WNA,ENA,SAM CD 11 1 26 SAF A1 23 0 38 ME,EA,E D4 29 2 46 WNA,ENA,SAM 3C 31 1 42 H A0 13 0 54 ME,EA,E 80 16 3 50 WNA,A,EA AC 19 1 58 I,EA A1 13 1 10 ME,EA,E 3C 16 4 22 A CC 20 2 30 SAF A0 25 1 26 ME,EA,E 38 19 4 38 I,EA CD 20 3 2 SAF A2 13 1 42 ME,EA,E 3D 16 5 10 A A4 23 3 34 SAF,I AC 19 1 58 A,EA 3C 32 5 42 A 80 16 3 50 WNA,H,EA F1 07 2 14 I 38 11 6 30 I 3C 16 4 22 H A0 07 2 30 ME,EA,E 3C 20 6 46 A,EA CC 13 4 54 SAF A1 07 2 46 ME,EA,E 3D 20 7 18 A,EA 3D 16 5 10 H F2 07 3 2 I 34 31 7 34 WNA,ENA,SAM CD 13 5 26 SAF A0 27 3 18 ME,EA,E 35 31 7 50 WNA,ENA,SAM 3C 32 5 42 H A4 23 3 34 SAF,A 3C 23 8 6 A AC 07 5 58 I FB 07 3 50 I 3D 23 8 22 A 3C 20 6 46 H,EA FC 07 4 6 I 34 32 8 38 WNA,EA,ENA 3D 20 7 18 H,EA A0 08 4 22 ME,EA,E 35 32 8 54 WNA,EA,ENA 3C 23 8 6 H 38 19 4 38 H,EA 34 20 9 42 WNA,EA,ENA 3D 23 8 22 H BC 17 5 10 SAF,ME 3C 13 9 58 A,EA CC 10 9 10 SAF A0 28 5 42 ME,EA,E 3C 17 10 30 A,EA 3C 13 9 58 H,EA AC 07 5 58 A 34 23 11 2 WNA,EA,ENA CC 26 10 14 SAF 38 11 6 30 H 3C 27 11 18 A 3C 17 10 30 H,EA BC 02 8 54 SAF,ME D4 32 11 50 WNA,ENA,SAM CD 26 10 46 SAF BC 09 9 42 SAF,ME,E 34 13 12 6 WNA,EA,ENA 3C 27 11 18 H BC 24 11 50 SAF,ME,E 35 13 12 22 WNA,EA,ENA 3C 08 12 38 H BC 30 12 6 SAF,ME,E 3C 08 12 38 A AC 26 13 10 I,EA BD 30 12 22 SAF,ME,E 35 23 13 26 WNA,ENA,SAM CC 09 13 26 SAF D4 30 12 38 SAF,ME,E 34 27 13 42 WNA,EA,ENA 3C 02 14 14 H,EA D5 30 12 54 SAF,ME,E 35 27 13 58 WNA,EA,ENA CC 05 14 46 SAF AC 26 13 10 A,EA 3C 02 14 14 A,EA CD 05 15 2 SAF A0 24 13 26 ME,EA,E 34 08 15 2 WNA,EA,ENA D4 05 15 18 SAF BC 18 13 42 SAF,ME 3C 10 17 22 A CC 30 15 50 SAF BD 18 13 58 SAF,ME 3C 12 18 10 A,EA AC 09 16 6 I,EA D4 18 14 14 SAF,ME 3D 12 18 26 A,EA CD 30 16 22 SAF D5 18 14 30 SAF,ME 3C 05 18 58 A,EA AD 09 16 38 I,EA A0 21 15 50 ME,EA,E 34 04 19 30 WNA,ENA,SAM CC 29 16 54 SAF AC 09 16 6 A,EA 35 04 19 46 WNA,ENA,SAM 3C 10 17 22 H A0 18 16 22 ME,EA,E D4 04 20 2 WNA,ENA,SAM 3C 12 18 10 H,EA AD 09 16 38 A,EA 38 30 20 18 I 3D 12 18 26 H,EA BC 06 17 22 SAF,ME,E 34 12 21 6 WNA,EA,ENA 3C 05 18 58 H,EA A0 22 17 54 ME,EA,E 35 12 21 22 WNA,EA,ENA CC 16 20 2 SAF BC 31 19 46 SAF,ME,EA 34 02 21 38 WNA,ENA AC 22 20 34 I,EA 38 30 20 18 H 34 05 21 54 WNA,EA,ENA AD 22 20 50 I,EA AC 22 20 34 A,EA AC 14 22 10 I,A,EA CC 06 21 22 SAF AD 22 20 50 A,EA D4 12 22 26 WNA,ENA AC 14 22 10 I,H,EA AC 14 22 10 A,H,EA 38 31 23 14 I CC 03 22 26 SAF 38 31 23 14 H D5 29 23 46 WNA,EA,ENA CC 19 22 58 SAF BC 32 23 30 SAF,ME,EA GPS Schedule no 51 (31 October 2008) *** Middle East *** *** South Africa *** *** South America *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m A0 23 0 6 I,EA,E BC 08 0 22 ME,SAM 18 10 0 6 WNA,ENA BC 08 0 22 SAF,SAM CC 11 1 10 A BC 08 0 22 SAF,ME A1 23 0 38 I,EA,E CD 11 1 26 A F8 17 0 38 SAM A0 13 0 54 I,EA,E CC 20 2 30 A F8 26 0 54 SAM A1 13 1 10 I,EA,E CD 20 3 2 A FB 26 1 10 SAM A0 25 1 26 I,EA,E A4 23 3 34 I,A 68 26 1 26 ENA A2 13 1 42 I,EA,E BC 10 3 50 ME,E,SAM F8 02 1 42 SAM 74 10 1 58 WNA,ENA,E BD 10 4 38 ME,SAM FB 02 1 58 SAM A0 07 2 30 I,EA,E CC 13 4 54 A FC 02 2 14 SAM A1 07 2 46 I,EA,E BC 17 5 10 ME,I 35 29 2 30 WNA,H,ENA A0 27 3 18 I,EA,E CD 13 5 26 A D4 29 2 46 WNA,H,ENA 74 26 3 34 WNA,ENA,E BC 02 8 54 ME,I FD 02 3 2 SAM BC 10 3 50 SAF,E,SAM CC 10 9 10 A FE 02 3 18 SAM A0 08 4 22 I,EA,E BC 09 9 42 ME,I,E FE 02 3 34 SAM BD 10 4 38 SAF,SAM CC 26 10 14 A BC 10 3 50 SAF,ME,E BC 17 5 10 SAF,I CD 26 10 46 A FE 02 4 6 SAM A0 28 5 42 I,EA,E BC 24 11 50 ME,I,E F8 05 4 22 SAM 74 09 6 14 WNA,ENA,E BC 30 12 6 ME,I,E BD 10 4 38 SAF,ME BC 02 8 54 SAF,I BD 30 12 22 ME,I,E FB 05 4 54 SAM BC 09 9 42 SAF,I,E D4 30 12 38 ME,I,E 18 09 5 26 WNA,ENA,E 74 31 11 18 WNA,ENA,E D5 30 12 54 ME,I,E 18 18 5 58 WNA,ENA,E BC 24 11 50 SAF,I,E CC 09 13 26 A 19 18 6 30 WNA,ENA,E BC 30 12 6 SAF,I,E BC 18 13 42 ME,I 1A 18 6 46 WNA,ENA,E BD 30 12 22 SAF,I,E BD 18 13 58 ME,I 34 31 7 34 WNA,H,ENA D4 30 12 38 SAF,I,E D4 18 14 14 ME,I 35 31 7 50 WNA,H,ENA D5 30 12 54 SAF,I,E D5 18 14 30 ME,I 18 14 9 10 WNA,ENA,E 74 16 13 10 WNA,ENA,E CC 05 14 46 A 19 14 9 26 WNA,ENA,E A0 24 13 26 I,EA,E CD 05 15 2 A D4 32 11 50 WNA,H,ENA BC 18 13 42 SAF,I D4 05 15 18 A 35 23 13 26 WNA,H,ENA BD 18 13 58 SAF,I CC 30 15 50 A 18 06 14 14 WNA,ENA,E D4 18 14 14 SAF,I BC 16 16 6 ME,E,SAM 18 03 14 30 WNA,ENA,E D5 18 14 30 SAF,I CD 30 16 22 A 19 03 14 46 WNA,ENA,E A0 21 15 50 I,EA,E BD 16 16 38 ME,SAM 18 19 15 18 WNA,ENA,E BC 16 16 6 SAF,E,SAM CC 29 16 54 A 19 19 15 34 WNA,ENA,E A0 18 16 22 I,EA,E BC 06 17 22 ME,I,E BC 16 16 6 SAF,ME,E BD 16 16 38 SAF,SAM BC 31 19 46 ME,I,EA BD 16 16 38 SAF,ME BC 06 17 22 SAF,I,E CC 16 20 2 A 18 27 17 38 WNA,ENA A0 22 17 54 I,EA,E CA 13 20 18 SAM 18 11 18 10 WNA,ENA,E 74 11 18 26 WNA,ENA,E CB 13 20 34 SAM 34 04 19 30 WNA,H,ENA BC 31 19 46 SAF,I,EA BC 23 20 50 ME,E,SAM 35 04 19 46 WNA,H,ENA BC 23 20 50 SAF,E,SAM BD 23 21 6 ME,E,SAM D4 04 20 2 WNA,H,ENA BD 23 21 6 SAF,E,SAM CC 06 21 22 A CA 13 20 18 SAF BC 13 21 38 SAF,E,SAM BC 13 21 38 ME,E,SAM CB 13 20 34 SAF BD 13 21 54 SAF,SAM BD 13 21 54 ME,SAM BC 23 20 50 SAF,ME,E D4 13 22 10 SAF,E,SAM D4 13 22 10 ME,E,SAM BD 23 21 6 SAF,ME,E 74 04 22 42 WNA,ENA,E CC 03 22 26 A BC 13 21 38 SAF,ME,E 75 04 22 58 WNA,ENA,E CC 19 22 58 A BD 13 21 54 SAF,ME BC 32 23 30 SAF,I,EA BC 32 23 30 ME,I,EA D4 13 22 10 SAF,ME,E