18 April 2011 FA/GPSW.407 Dear Colleagues, Please find enclosed tracking schedule No. 56 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 55680 (29 April 2011) 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 Director, BIPM Time Department 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 In the near future, when all single-channel receivers are withdrawn from operation, the use of a fixed reference date for multi-channel receivers will allow us to cease publication of this common-view schedule.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 56 * * for implementation on MJD 55680 (29 April 2011) 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, DMDM, DTAG, EIM, IFAG, IPQ, IT, JV, KZ, LT, LV, Mad*, MIKE, MKEH, NIMB, NPL, OB*, OCA*, OP, ORB, PL, PTB, RAAI*, RIRT*, ROA, SIQ, SMD, SMU, SP, SU, TP, UA, UME, VSL 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 IGNA, INTI, 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 4, 2009, available in the BIPM web site); other laboratories are indicated by an asterisk. * AMC : USNO Alternate Master Clock, Colorado. AO : Arecibo Observatory. 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. 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 56 (29 April 2011) *** Europe *** Class PRN Start Connects h m 74 06 0 6 WNA,ME,ENA,SAM BC 18 0 22 SAF,ME,I BD 18 0 54 SAF,ME,I A0 21 1 10 ME,I,EA BC 16 1 26 SAF,ME,SAM BD 16 1 42 SAF,ME,SAM 74 19 1 58 WNA,ME,ENA A0 22 3 18 ME,I,EA A1 22 3 34 ME,I,EA A2 22 3 50 ME,I,EA A0 14 4 50 ME,I,EA BC 23 5 54 SAF,ME,SAM BD 23 6 42 SAF,ME,SAM A0 32 7 30 ME,I,EA A1 32 7 46 ME,I,EA BC 13 8 2 SAF,ME,SAM 74 04 8 34 WNA,ME,ENA 75 04 8 50 WNA,ME,ENA A0 23 9 22 ME,I,EA 74 10 9 38 WNA,ME,ENA 18 02 10 26 WNA,ENA,SAM BC 08 10 42 SAF,ME,SAM BD 08 10 58 SAF,ME,SAM A0 13 11 30 ME,I,EA 74 05 11 46 WNA,ME,ENA A0 07 12 18 ME,I,EA A1 07 12 34 ME,I,EA A2 07 12 50 ME,I,EA 74 26 13 6 WNA,ME,ENA A0 08 13 38 ME,I,EA BC 05 13 54 SAF,ME,SAM BD 05 14 10 SAF,ME,SAM 74 15 14 26 WNA,ME,ENA 75 15 14 42 WNA,ME,ENA A0 28 14 58 ME,I,EA A1 28 15 14 ME,I,EA 18 09 15 46 WNA,ENA,SAM 74 09 16 2 WNA,ME,ENA BC 27 18 10 SAF,ME,I BC 29 18 42 SAF,ME,SAM BD 29 19 30 SAF,ME,SAM D4 29 19 46 SAF,ME,SAM 74 31 20 50 WNA,ME,ENA 75 31 21 6 WNA,ME,ENA 74 30 22 26 WNA,ME,ENA 75 30 22 42 WNA,ME,ENA BD 31 22 58 SAF,ME,SAM 74 16 23 30 WNA,ME,ENA GPS Schedule no 56 (29 April 2011) *** 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 74 06 0 6 WNA,ME,E,SAM 74 06 0 6 ME,ENA,E,SAM 34 08 0 38 WNA,H,ENA 34 07 0 22 WNA,H 34 07 0 22 H,ENA 35 08 0 54 WNA,H,ENA 34 08 0 38 WNA,H,EA 34 08 0 38 H,EA,ENA A0 21 1 10 ME,I,E 35 08 0 54 WNA,H,EA 35 08 0 54 H,EA,ENA AC 09 1 58 I,A D4 08 1 10 WNA,H D4 08 1 10 H,ENA AD 09 2 30 I,A D5 08 1 42 WNA,H D5 08 1 42 H,ENA 38 27 3 2 I,H 74 19 1 58 WNA,ME,E 74 19 1 58 ME,ENA,E A0 22 3 18 ME,I,E 34 28 2 14 WNA,H 34 28 2 14 H,ENA A1 22 3 34 ME,I,E 18 07 2 30 WNA,SAM 18 07 2 30 ENA,SAM A2 22 3 50 ME,I,E 19 07 2 46 WNA,SAM 19 07 2 46 ENA,SAM 3C 12 4 6 A,H 1A 07 3 2 WNA,SAM 1A 07 3 2 ENA,SAM 3D 12 4 34 A,H 68 07 3 18 SAM 18 08 3 50 ENA,SAM A0 14 4 50 ME,I,E 18 08 3 50 WNA,SAM 34 27 5 6 H,EA,ENA 34 27 5 6 WNA,H,ENA 34 27 5 6 WNA,H,EA 35 27 5 22 H,EA,ENA 35 27 5 22 WNA,H,ENA 35 27 5 22 WNA,H,EA 34 04 5 38 H,ENA,SAM BC 31 5 38 SAF,ME,I 34 04 5 38 WNA,H,SAM 34 09 5 54 H,EA,ENA 34 09 5 54 WNA,H,ENA 34 09 5 54 WNA,H,EA 34 12 6 58 H,EA,ENA AC 22 6 42 I,A 34 12 6 58 WNA,H,EA 35 12 7 14 H,EA,ENA 34 12 6 58 WNA,H,ENA 35 12 7 14 WNA,H,EA D4 12 8 18 H,ENA 35 12 7 14 WNA,H,ENA D4 12 8 18 WNA,H 74 04 8 34 ME,ENA,E A0 32 7 30 ME,I,E 74 04 8 34 WNA,ME,E 75 04 8 50 ME,ENA,E A1 32 7 46 ME,I,E 75 04 8 50 WNA,ME,E 74 10 9 38 ME,ENA,E 3C 14 8 2 A,H 74 10 9 38 WNA,ME,E 18 02 10 26 ENA,E,SAM BC 32 9 6 SAF,ME,I 18 02 10 26 WNA,E,SAM 74 05 11 46 ME,ENA,E A0 23 9 22 ME,I,E 74 05 11 46 WNA,ME,E 34 29 12 18 H,ENA,SAM AC 06 9 54 I,A 34 29 12 18 WNA,H,SAM 35 29 12 34 H,ENA,SAM AC 03 10 26 I,A 35 29 12 34 WNA,H,SAM 74 26 13 6 ME,ENA,E 3C 31 10 42 A,H 74 26 13 6 WNA,ME,E 80 16 13 54 A,H,EA 3D 31 11 14 A,H 74 15 14 26 WNA,ME,E 74 15 14 26 ME,ENA,E A0 13 11 30 ME,I,E 75 15 14 42 WNA,ME,E 75 15 14 42 ME,ENA,E A0 07 12 18 ME,I,E 18 21 15 14 WNA,SAM 18 21 15 14 ENA,SAM A1 07 12 34 ME,I,E 18 09 15 46 WNA,E,SAM 18 09 15 46 ENA,E,SAM A2 07 12 50 ME,I,E 74 09 16 2 WNA,ME,E 74 09 16 2 ME,ENA,E A0 08 13 38 ME,I,E 34 31 17 6 WNA,H,SAM 34 31 17 6 H,ENA,SAM 80 16 13 54 WNA,A,H 35 31 17 22 WNA,H,SAM 35 31 17 22 H,ENA,SAM AC 24 14 10 I,A D4 31 17 38 WNA,H,SAM D4 31 17 38 H,ENA,SAM A0 28 14 58 ME,I,E 34 32 18 26 WNA,H,EA 34 32 18 26 H,EA,ENA A1 28 15 14 ME,I,E 34 20 19 30 WNA,H,EA 34 20 19 30 H,EA,ENA 3C 32 15 30 A,H 34 23 20 18 WNA,H,EA 34 23 20 18 H,EA,ENA 3D 32 15 46 A,H 35 23 20 34 WNA,H,EA 35 23 20 34 H,EA,ENA 34 32 18 26 WNA,H,ENA 74 31 20 50 WNA,ME,E 74 31 20 50 ME,ENA,E 34 20 19 30 WNA,H,ENA 75 31 21 6 WNA,ME,E 75 31 21 6 ME,ENA,E AC 17 19 46 I,A,H 35 32 21 38 WNA,H,SAM 35 32 21 38 H,ENA,SAM 34 23 20 18 WNA,H,ENA 34 13 21 54 WNA,H,EA 34 13 21 54 H,EA,ENA 35 23 20 34 WNA,H,ENA 35 13 22 10 WNA,H,EA 35 13 22 10 H,EA,ENA 34 13 21 54 WNA,H,ENA 74 30 22 26 WNA,ME,E 74 30 22 26 ME,ENA,E 35 13 22 10 WNA,H,ENA 75 30 22 42 WNA,ME,E 75 30 22 42 ME,ENA,E 3C 04 22 42 A,H 74 16 23 30 WNA,ME,E 74 16 23 30 ME,ENA,E AC 26 22 58 I,A GPS Schedule no 56 (29 April 2011) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m F0 07 0 6 H CC 12 0 6 SAF F1 15 0 6 I 34 07 0 22 WNA,ENA CD 12 0 38 SAF BC 18 0 22 SAF,ME,E 34 08 0 38 WNA,EA,ENA AC 09 1 58 I,EA F2 15 0 38 I 35 08 0 54 WNA,EA,ENA CC 29 2 14 SAF BD 18 0 54 SAF,ME,E D4 08 1 10 WNA,ENA AD 09 2 30 I,EA A0 21 1 10 ME,EA,E D5 08 1 42 WNA,ENA CD 29 2 46 SAF FB 15 1 26 I 34 28 2 14 WNA,ENA 3C 12 4 6 H,EA FC 15 1 42 I 38 15 2 46 I 3D 12 4 34 H,EA AC 09 1 58 A,EA 38 27 3 2 I,EA CC 30 5 22 SAF F1 18 2 14 I 3C 12 4 6 A,EA 3C 15 6 10 H AD 09 2 30 A,EA 3D 12 4 34 A,EA CC 16 6 26 SAF 38 15 2 46 H 34 27 5 6 WNA,EA,ENA AC 22 6 42 I,EA 38 27 3 2 H,EA 35 27 5 22 WNA,EA,ENA CC 06 6 58 SAF A0 22 3 18 ME,EA,E 34 04 5 38 WNA,ENA,SAM A4 16 7 14 SAF,I A1 22 3 34 ME,EA,E 34 09 5 54 WNA,EA,ENA CC 03 7 30 SAF A2 22 3 50 ME,EA,E 3C 15 6 10 A CD 03 7 46 SAF F1 14 4 6 I 38 25 6 26 I 3C 14 8 2 H,EA A0 14 4 50 ME,EA,E 34 12 6 58 WNA,EA,ENA CC 19 8 50 SAF BC 31 5 38 SAF,ME,EA 35 12 7 14 WNA,EA,ENA 3C 21 9 6 H 38 25 6 26 H 3C 14 8 2 A,EA CD 19 9 22 SAF AC 22 6 42 A,EA D4 12 8 18 WNA,ENA AC 06 9 54 I,EA A4 16 7 14 SAF,A 38 31 8 50 I AC 03 10 26 I,EA A0 32 7 30 ME,EA,E 3C 21 9 6 A 3C 31 10 42 H,EA A1 32 7 46 ME,EA,E 3C 31 10 42 A,EA 3D 31 11 14 H,EA 38 31 8 50 H 3D 31 11 14 A,EA CC 24 11 30 SAF BC 32 9 6 SAF,ME,EA 38 06 12 2 I CC 32 11 46 SAF A0 23 9 22 ME,EA,E 34 29 12 18 WNA,ENA,SAM CC 20 12 34 SAF AC 06 9 54 A,EA 35 29 12 34 WNA,ENA,SAM CD 20 12 50 SAF AC 03 10 26 A,EA 80 16 13 54 WNA,A,EA 80 16 13 54 WNA,H,EA A0 13 11 30 ME,EA,E 3C 16 14 58 A AC 24 14 10 I,EA 38 06 12 2 H 3C 32 15 30 A,EA A4 13 14 26 SAF,I A0 07 12 18 ME,EA,E 3D 32 15 46 A,EA CC 13 14 42 SAF A1 07 12 34 ME,EA,E 38 24 16 2 I 3C 16 14 58 H A2 07 12 50 ME,EA,E D4 24 16 18 I CD 13 15 14 SAF A0 08 13 38 ME,EA,E 34 31 17 6 WNA,ENA,SAM 3C 32 15 30 H,EA AC 24 14 10 A,EA 35 31 17 22 WNA,ENA,SAM 3D 32 15 46 H,EA A4 13 14 26 SAF,A D4 31 17 38 WNA,ENA,SAM CC 10 16 34 SAF A0 28 14 58 ME,EA,E 34 32 18 26 WNA,EA,ENA CD 10 17 6 SAF A1 28 15 14 ME,EA,E 34 20 19 30 WNA,EA,ENA CC 05 18 26 SAF 38 24 16 2 H AC 17 19 46 I,A,EA CD 05 18 58 SAF D4 24 16 18 H 34 23 20 18 WNA,EA,ENA A4 05 19 14 SAF,I BC 27 18 10 SAF,ME,E 35 23 20 34 WNA,EA,ENA AC 17 19 46 I,H,EA A4 05 19 14 SAF,A 38 04 20 50 I CC 26 20 2 SAF AC 17 19 46 A,H,EA 35 32 21 38 WNA,ENA,SAM CC 15 21 22 SAF 38 04 20 50 H 34 13 21 54 WNA,EA,ENA CD 15 21 38 SAF A4 15 22 26 SAF,A 35 13 22 10 WNA,EA,ENA A4 15 22 26 SAF,I A4 25 22 42 SAF 3C 04 22 42 A,EA 3C 04 22 42 H,EA AC 26 22 58 A,EA 38 05 23 46 I AC 26 22 58 I,EA 38 05 23 46 H GPS Schedule no 56 (29 April 2011) *** Middle East *** *** South Africa *** *** South America *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 74 06 0 6 WNA,ENA,E,SAM CC 12 0 6 A 74 06 0 6 WNA,ME,ENA,E BC 18 0 22 SAF,I,E BC 18 0 22 ME,I,E F8 11 0 22 SAM BD 18 0 54 SAF,I,E CD 12 0 38 A FB 11 0 38 SAM A0 21 1 10 I,EA,E BD 18 0 54 ME,I,E FC 11 0 54 SAM BC 16 1 26 SAF,E,SAM BC 16 1 26 ME,E,SAM FD 11 1 10 SAM BD 16 1 42 SAF,E,SAM BD 16 1 42 ME,E,SAM BC 16 1 26 SAF,ME,E 74 19 1 58 WNA,ENA,E CC 29 2 14 A BD 16 1 42 SAF,ME,E A0 22 3 18 I,EA,E CD 29 2 46 A FE 11 1 58 SAM A1 22 3 34 I,EA,E CC 30 5 22 A FE 11 2 14 SAM A2 22 3 50 I,EA,E BC 31 5 38 ME,I,EA 18 07 2 30 WNA,ENA A0 14 4 50 I,EA,E BC 23 5 54 ME,E,SAM 19 07 2 46 WNA,ENA BC 31 5 38 SAF,I,EA CA 13 6 10 SAM 1A 07 3 2 WNA,ENA BC 23 5 54 SAF,E,SAM CC 16 6 26 A 68 07 3 18 ENA BD 23 6 42 SAF,E,SAM BD 23 6 42 ME,E,SAM F8 07 3 34 SAM A0 32 7 30 I,EA,E CC 06 6 58 A 18 08 3 50 WNA,ENA A1 32 7 46 I,EA,E A4 16 7 14 I,A FB 07 4 6 SAM BC 13 8 2 SAF,E,SAM CC 03 7 30 A FC 07 4 34 SAM 74 04 8 34 WNA,ENA,E CD 03 7 46 A FD 07 4 50 SAM 75 04 8 50 WNA,ENA,E BC 13 8 2 ME,E,SAM FE 07 5 6 SAM BC 32 9 6 SAF,I,EA CC 19 8 50 A FE 07 5 22 SAM A0 23 9 22 I,EA,E BC 32 9 6 ME,I,EA 34 04 5 38 WNA,H,ENA 74 10 9 38 WNA,ENA,E CD 19 9 22 A BC 23 5 54 SAF,ME,E BC 08 10 42 SAF,E,SAM BC 08 10 42 ME,E,SAM CA 13 6 10 SAF BD 08 10 58 SAF,E,SAM BD 08 10 58 ME,E,SAM F8 10 6 26 SAM A0 13 11 30 I,EA,E CC 24 11 30 A BD 23 6 42 SAF,ME,E 74 05 11 46 WNA,ENA,E CC 32 11 46 A FB 10 6 58 SAM A0 07 12 18 I,EA,E CC 20 12 34 A FC 10 7 14 SAM A1 07 12 34 I,EA,E CD 20 12 50 A FD 10 7 30 SAM A2 07 12 50 I,EA,E BC 05 13 54 ME,E,SAM FE 10 7 46 SAM 74 26 13 6 WNA,ENA,E BD 05 14 10 ME,E,SAM BC 13 8 2 SAF,ME,E A0 08 13 38 I,EA,E A4 13 14 26 I,A F8 17 8 18 SAM BC 05 13 54 SAF,E,SAM CC 13 14 42 A 18 02 10 26 WNA,ENA,E BD 05 14 10 SAF,E,SAM CD 13 15 14 A BC 08 10 42 SAF,ME,E 74 15 14 26 WNA,ENA,E CC 10 16 34 A BD 08 10 58 SAF,ME,E 75 15 14 42 WNA,ENA,E CD 10 17 6 A 34 29 12 18 WNA,H,ENA A0 28 14 58 I,EA,E BC 27 18 10 ME,I,E 35 29 12 34 WNA,H,ENA A1 28 15 14 I,EA,E CC 05 18 26 A BC 05 13 54 SAF,ME,E 74 09 16 2 WNA,ENA,E BC 29 18 42 ME,E,SAM BD 05 14 10 SAF,ME,E BC 27 18 10 SAF,I,E CD 05 18 58 A 18 21 15 14 WNA,ENA BC 29 18 42 SAF,E,SAM A4 05 19 14 I,A 18 09 15 46 WNA,ENA,E BD 29 19 30 SAF,E,SAM BD 29 19 30 ME,E,SAM 34 31 17 6 WNA,H,ENA D4 29 19 46 SAF,E,SAM D4 29 19 46 ME,E,SAM 35 31 17 22 WNA,H,ENA 74 31 20 50 WNA,ENA,E CC 26 20 2 A D4 31 17 38 WNA,H,ENA 75 31 21 6 WNA,ENA,E CC 15 21 22 A BC 29 18 42 SAF,ME,E 74 30 22 26 WNA,ENA,E CD 15 21 38 A BD 29 19 30 SAF,ME,E 75 30 22 42 WNA,ENA,E A4 15 22 26 I,A D4 29 19 46 SAF,ME,E BD 31 22 58 SAF,E,SAM A4 25 22 42 I 35 32 21 38 WNA,H,ENA 74 16 23 30 WNA,ENA,E BD 31 22 58 ME,E,SAM BD 31 22 58 SAF,ME,E