19 March 2001 FA/GPSW.386 Dear Colleagues, Please find enclosed tracking schedule No. 36 for international time and frequency comparisons by GPS common-view single-channel receivers. For the first time, preparation of this schedule has been fully automated. It follows that all areas now have an equal number of tracks (48). Also, we are no longer issuing sub-schedules for Europe; if this is likely to pose a problem please contact us. The enclosed schedule should be implemented on MJD 52002 (3 April 2001) 00 h 00 UTC. The GPS tracking schedules are sent to regular users by e-mail and are also available by anonymous FTP (ftp2.bipm.org, node 62.161.69.5, subdirectory TAI) 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 27 at 00 h 06 should be entered in the AOA receivers at 00 h 04. This tracking schedule conforms with the technical directives for standardization drawn up by the CCTF Sub-Group on GPS and GLONASS Time Transfer Standards. 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 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 In the future, when all single-channel receivers are withdrawn from operation, the use of a fixed reference date for "all-in-view" observations by multi-channel receivers will allow us to cease publication of this common-view schedule. *************************************************************************** * GPS Schedule no 36 * * for implementation on MJD 52002 (2001 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*, NMC*, 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, NIMT* NRLM, PSB, SCL, 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* * NIMT: National Institute of Metrology (Thailand), Bangkok, Thailand NMC: National Centre of Metrology, Sofia, Bulgaria Mad, Gold, Can : JPL Deep Space Network, Madrid, Goldstone, Canberra. RAAI: Romanian Academy Astronomical Institute, Bucarest. RIRT: Russian Institute of Radionavigation and Time, Saint Petersbourg. AO : Arecibo Observatory. 3S Navigation: Irvine, California. WWV, WWVH : NIST stations in Colorado and Hawaii. ATC, ORR : Australian laboratories. Kou: CNES Kourou Center. Other laboratories are designated by their usual acronyms (see Table 3 of the Annual Report of the BIPM Time Section, Volume 12, 1999). 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. GPS Schedule no 36 ( 3 April 2001) *** Europe *** Class PRN Start Connects h m A0 27 0 6 ME,I,EA A1 27 0 22 ME,I,EA A2 27 0 38 ME,I,EA BC 02 0 54 SAF,ME,I A0 08 1 10 ME,I,EA A1 08 1 26 ME,I,EA A2 08 1 42 ME,I,EA BC 10 1 58 SAF,ME,SAM BC 07 2 30 SAF,ME,I A0 02 2 46 ME,I,EA A1 02 3 2 ME,I,EA A2 02 3 18 ME,I,EA 18 23 3 34 WNA,ENA,SAM 19 23 3 50 WNA,ENA,SAM 1A 23 4 6 WNA,ENA,SAM A0 07 4 22 ME,I,EA 18 14 6 14 WNA,ENA,SAM BC 09 6 30 SAF,ME,I BD 09 6 46 SAF,ME,I 74 25 8 38 WNA,ME,ENA,SAM BC 05 8 54 SAF,ME,I BC 30 9 10 SAF,ME,I BD 30 9 26 SAF,ME,I 74 22 10 26 WNA,ME,ENA 75 22 10 42 WNA,ME,ENA BC 18 10 58 SAF,ME,I BD 18 11 14 SAF,ME,I BC 23 11 30 SAF,ME,I 18 03 11 46 WNA,ENA,SAM BD 23 12 2 SAF,ME,I A0 17 12 18 ME,I,EA BC 21 12 34 SAF,ME,I 18 31 12 50 WNA,ENA,SAM BC 22 13 6 SAF,ME,SAM A0 23 13 22 ME,I,EA 74 31 13 38 WNA,ME,ENA BC 29 14 42 SAF,ME,I 18 11 15 14 WNA,ENA,SAM A0 21 15 30 ME,I,EA 18 07 18 10 WNA,ENA,SAM 19 07 18 26 WNA,ENA,SAM BC 11 18 58 SAF,ME,I BC 20 20 50 SAF,ME,I A0 01 21 22 ME,I,EA 74 24 21 54 WNA,ME,ENA,SAM A0 19 22 58 ME,I,EA 74 10 23 30 WNA,ME,ENA 75 10 23 46 WNA,ME,ENA GPS Schedule no 36 ( 3 April 2001) *** 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 34 06 0 6 WNA,H,SAM 34 06 0 6 H,ENA,SAM A0 27 0 6 ME,I,E 35 06 0 22 WNA,H,SAM 35 06 0 22 H,ENA,SAM A1 27 0 22 ME,I,E 34 18 0 38 WNA,H 34 18 0 38 H,ENA A2 27 0 38 ME,I,E 34 23 0 54 WNA,H 34 23 0 54 H,ENA A0 08 1 10 ME,I,E 35 23 1 10 WNA,H 35 23 1 10 H,ENA A1 08 1 26 ME,I,E 68 09 1 42 SAM 34 03 1 58 H,EA A2 08 1 42 ME,I,E 18 17 2 30 WNA,SAM 35 03 2 14 H,EA 34 03 1 58 WNA,H 19 17 2 46 WNA,SAM 18 17 2 30 ENA,SAM 35 03 2 14 WNA,H 34 14 3 2 WNA,H 19 17 2 46 ENA,SAM A0 02 2 46 ME,I,E 18 23 3 34 WNA,E,SAM 34 14 3 2 H,ENA A1 02 3 2 ME,I,E 19 23 3 50 WNA,E,SAM 18 23 3 34 ENA,E,SAM A2 02 3 18 ME,I,E 1A 23 4 6 WNA,E,SAM 19 23 3 50 ENA,E,SAM 3C 20 4 6 A,H 68 23 4 22 SAM 1A 23 4 6 ENA,E,SAM A0 07 4 22 ME,I,E 68 30 5 26 SAM 34 11 4 54 H,EA 34 11 4 54 WNA,H 68 21 5 42 SAM 35 11 5 26 H,EA 35 11 5 26 WNA,H 69 21 5 58 SAM 18 14 6 14 ENA,E,SAM AC 02 5 58 I,A 18 14 6 14 WNA,E,SAM 34 20 6 30 H,EA AD 02 6 14 I,A 35 20 6 46 WNA,H,EA 35 20 6 46 H,EA,ENA 34 20 6 30 WNA,H D4 20 7 2 WNA,H,EA D4 20 7 2 H,EA,ENA 35 20 6 46 WNA,H,ENA 68 14 7 18 SAM 34 01 7 50 H,EA D4 20 7 2 WNA,H,ENA 35 01 8 6 WNA,H,EA 35 01 8 6 H,EA,ENA 3C 13 7 18 A,H 74 25 8 38 WNA,ME,E,SAM 74 25 8 38 ME,ENA,E,SAM 34 01 7 50 WNA,H 34 28 8 54 WNA,H,SAM 34 28 8 54 H,ENA,SAM 35 01 8 6 WNA,H,ENA 35 28 9 10 WNA,H,SAM 35 28 9 10 H,ENA,SAM 34 13 9 26 WNA,H,ENA 34 13 9 26 WNA,H,EA 34 13 9 26 H,EA,ENA 3C 04 10 42 A,H 74 22 10 26 WNA,ME,E 74 22 10 26 ME,ENA,E 3C 24 11 30 A,H 75 22 10 42 WNA,ME,E 75 22 10 42 ME,ENA,E 3D 24 11 46 A,H 18 03 11 46 WNA,E,SAM 18 03 11 46 ENA,E,SAM 34 08 12 2 WNA,H,ENA 34 08 12 2 WNA,H,EA 34 08 12 2 H,EA,ENA A0 17 12 18 ME,I,E 35 13 12 18 WNA,H,SAM 35 13 12 18 H,ENA,SAM A0 23 13 22 ME,I,E D4 13 12 34 WNA,H,SAM D4 13 12 34 H,ENA,SAM 3C 10 13 38 A,H 18 31 12 50 WNA,E,SAM 18 31 12 50 ENA,E,SAM 3D 10 14 10 A,H 74 31 13 38 WNA,ME,E 74 31 13 38 ME,ENA,E AC 17 14 58 I,A 34 02 14 42 WNA,H 34 02 14 42 H,ENA A0 21 15 30 ME,I,E 18 11 15 14 WNA,E,SAM 18 11 15 14 ENA,E,SAM 3C 05 15 46 A,H 34 07 15 30 WNA,H 34 07 15 30 H,ENA 3D 05 16 18 A,H 34 04 16 50 WNA,H,SAM 34 04 16 50 H,ENA,SAM 34 09 17 22 WNA,H,ENA 35 04 17 6 WNA,H,SAM 35 04 17 6 H,ENA,SAM AC 21 18 10 I,A 34 09 17 22 WNA,H,EA 34 09 17 22 H,EA,ENA 34 05 18 42 WNA,H,ENA 18 07 18 10 WNA,E,SAM 18 07 18 10 ENA,E,SAM 3C 06 18 58 A,H 19 07 18 26 WNA,E,SAM 19 07 18 26 ENA,E,SAM AC 29 19 46 I,A 34 05 18 42 WNA,H,EA 34 05 18 42 H,EA,ENA 34 30 20 2 WNA,H,ENA 34 30 20 2 WNA,H,EA 34 30 20 2 H,EA,ENA D4 06 21 6 WNA,H,ENA 74 04 20 18 WNA,ME 74 04 20 18 ME,ENA A0 01 21 22 ME,I,E D4 06 21 6 WNA,H,EA D4 06 21 6 H,EA,ENA AC 03 21 38 I,A 74 24 21 54 WNA,ME,E,SAM 74 24 21 54 ME,ENA,E,SAM AD 03 21 54 I,A 74 10 23 30 WNA,ME,E 74 10 23 30 ME,ENA,E AE 03 22 10 I,A 75 10 23 46 WNA,ME,E 75 10 23 46 ME,ENA,E A0 19 22 58 ME,I,E GPS Schedule no 36 ( 3 April 2001) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 34 06 0 6 WNA,ENA,SAM CC 20 0 6 SAF A0 27 0 6 ME,EA,E 35 06 0 22 WNA,ENA,SAM CD 20 0 22 SAF A1 27 0 22 ME,EA,E 34 18 0 38 WNA,ENA F9 11 0 38 A A2 27 0 38 ME,EA,E 34 23 0 54 WNA,ENA FA 11 0 54 A BC 02 0 54 SAF,ME,E 35 23 1 10 WNA,ENA F9 20 1 10 A A0 08 1 10 ME,EA,E 3C 22 1 26 A 3C 22 1 26 H A1 08 1 26 ME,EA,E 3D 22 1 42 A 3D 22 1 42 H A2 08 1 42 ME,EA,E 34 03 1 58 WNA,EA F9 01 1 58 A BC 07 2 30 SAF,ME,E 35 03 2 14 WNA,EA FA 01 2 14 A A0 02 2 46 ME,EA,E 34 14 3 2 WNA,ENA FB 01 2 30 A A1 02 3 2 ME,EA,E 38 11 3 34 I CC 13 2 46 SAF A2 02 3 18 ME,EA,E 3C 20 4 6 A,EA FC 01 3 2 A 38 11 3 34 H 34 11 4 54 WNA,EA 3C 20 4 6 H,EA A0 07 4 22 ME,EA,E 3C 01 5 10 A 3C 01 5 10 H A4 24 5 10 SAF 35 11 5 26 WNA,EA 3D 01 5 42 H BC 24 5 42 SAF,ME 3D 01 5 42 A AC 02 5 58 I,EA AC 02 5 58 A,EA 34 20 6 30 WNA,EA AD 02 6 14 I,EA AD 02 6 14 A,EA 35 20 6 46 WNA,EA,ENA 3C 13 7 18 H,EA BC 09 6 30 SAF,ME,E D4 20 7 2 WNA,EA,ENA CC 26 8 6 SAF BD 09 6 46 SAF,ME,E 3C 13 7 18 A,EA CD 26 8 22 SAF 38 04 8 22 H 34 01 7 50 WNA,EA D4 26 8 38 SAF BC 05 8 54 SAF,ME,E 35 01 8 6 WNA,EA,ENA CC 09 9 58 SAF BC 30 9 10 SAF,ME,E 38 04 8 22 I 3C 04 10 42 H,EA BD 30 9 26 SAF,ME,E 34 28 8 54 WNA,ENA,SAM 3C 24 11 30 H,EA BD 05 9 42 SAF,ME 35 28 9 10 WNA,ENA,SAM 3D 24 11 46 H,EA 38 24 9 58 H 34 13 9 26 WNA,EA,ENA CC 05 12 18 SAF D4 24 10 26 H 38 24 9 58 I CC 30 12 50 SAF BC 18 10 58 SAF,ME,E D4 24 10 26 I CD 30 13 22 SAF BD 18 11 14 SAF,ME,E 3C 04 10 42 A,EA 3C 10 13 38 H,EA BC 23 11 30 SAF,ME,E 3C 24 11 30 A,EA 3D 10 14 10 H,EA BD 23 12 2 SAF,ME,E 3D 24 11 46 A,EA CC 06 14 26 SAF A0 17 12 18 ME,EA,E 34 08 12 2 WNA,EA,ENA AC 17 14 58 I,EA BC 21 12 34 SAF,ME,E 35 13 12 18 WNA,ENA,SAM 3C 05 15 46 H,EA A0 23 13 22 ME,EA,E D4 13 12 34 WNA,ENA,SAM 3D 05 16 18 H,EA BC 29 14 42 SAF,ME,E 3C 10 13 38 A,EA CC 22 17 38 SAF AC 17 14 58 A,EA 3D 10 14 10 A,EA AC 21 18 10 I,EA 38 09 15 14 H 34 02 14 42 WNA,ENA A4 22 18 26 SAF,I A0 21 15 30 ME,EA,E 38 09 15 14 I A5 22 18 42 SAF,I AC 21 18 10 A,EA 34 07 15 30 WNA,ENA 3C 06 18 58 H,EA A4 22 18 26 SAF,A 3C 05 15 46 A,EA CC 03 19 14 SAF A5 22 18 42 SAF,A 3D 05 16 18 A,EA AC 29 19 46 I,EA BC 11 18 58 SAF,ME,E 34 04 16 50 WNA,ENA,SAM CC 31 20 34 SAF AC 29 19 46 A,EA 35 04 17 6 WNA,ENA,SAM CD 31 21 6 SAF BC 20 20 50 SAF,ME,E 34 09 17 22 WNA,EA,ENA AC 03 21 38 I,EA A0 01 21 22 ME,EA,E 34 05 18 42 WNA,EA,ENA AD 03 21 54 I,EA AC 03 21 38 A,EA 3C 06 18 58 A,EA AE 03 22 10 I,EA AD 03 21 54 A,EA 34 30 20 2 WNA,EA,ENA CC 11 22 42 SAF AE 03 22 10 A,EA D4 06 21 6 WNA,EA,ENA D5 20 23 46 SAF A0 19 22 58 ME,EA,E GPS Schedule no 36 ( 3 April 2001) *** 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 27 0 6 I,EA,E CC 20 0 6 A 34 06 0 6 WNA,H,ENA A1 27 0 22 I,EA,E CD 20 0 22 A 35 06 0 22 WNA,H,ENA A2 27 0 38 I,EA,E BC 02 0 54 ME,I,E F8 09 0 38 SAM BC 02 0 54 SAF,I,E CA 24 1 10 SAM FB 09 0 54 SAM A0 08 1 10 I,EA,E BC 10 1 58 ME,E,SAM CA 24 1 10 SAF A1 08 1 26 I,EA,E BD 10 2 14 ME,SAM F8 05 1 26 SAM A2 08 1 42 I,EA,E BC 07 2 30 ME,I,E 68 09 1 42 ENA BC 10 1 58 SAF,E,SAM CC 13 2 46 A BC 10 1 58 SAF,ME,E BD 10 2 14 SAF,SAM CA 10 3 2 SAM BD 10 2 14 SAF,ME BC 07 2 30 SAF,I,E A4 24 5 10 I 18 17 2 30 WNA,ENA A0 02 2 46 I,EA,E BC 24 5 42 ME,I 19 17 2 46 WNA,ENA A1 02 3 2 I,EA,E BC 09 6 30 ME,I,E CA 10 3 2 SAF A2 02 3 18 I,EA,E BD 09 6 46 ME,I,E FB 05 3 18 SAM A0 07 4 22 I,EA,E BC 06 7 2 ME,SAM 18 23 3 34 WNA,ENA,E BC 24 5 42 SAF,I CC 26 8 6 A 19 23 3 50 WNA,ENA,E BC 09 6 30 SAF,I,E CD 26 8 22 A 1A 23 4 6 WNA,ENA,E BD 09 6 46 SAF,I,E D4 26 8 38 A 68 23 4 22 ENA BC 06 7 2 SAF,SAM BC 05 8 54 ME,I,E F8 17 4 38 SAM 74 25 8 38 WNA,ENA,E,SAM BC 30 9 10 ME,I,E FB 17 4 54 SAM BC 05 8 54 SAF,I,E BD 30 9 26 ME,I,E F8 06 5 10 SAM BC 30 9 10 SAF,I,E BD 05 9 42 ME,I 68 30 5 26 ENA BD 30 9 26 SAF,I,E CC 09 9 58 A 68 21 5 42 ENA BD 05 9 42 SAF,I BC 18 10 58 ME,I,E 69 21 5 58 ENA 74 22 10 26 WNA,ENA,E BD 18 11 14 ME,I,E 18 14 6 14 WNA,ENA,E 75 22 10 42 WNA,ENA,E BC 23 11 30 ME,I,E F8 21 6 30 SAM BC 18 10 58 SAF,I,E BD 23 12 2 ME,I,E FB 21 6 46 SAM BD 18 11 14 SAF,I,E CC 05 12 18 A BC 06 7 2 SAF,ME BC 23 11 30 SAF,I,E BC 21 12 34 ME,I,E 68 14 7 18 ENA BD 23 12 2 SAF,I,E CC 30 12 50 A F8 14 7 34 SAM A0 17 12 18 I,EA,E BC 22 13 6 ME,E,SAM 74 25 8 38 WNA,ME,ENA,E BC 21 12 34 SAF,I,E CD 30 13 22 A 34 28 8 54 WNA,H,ENA BC 22 13 6 SAF,E,SAM BD 22 13 54 ME,SAM 35 28 9 10 WNA,H,ENA A0 23 13 22 I,EA,E BC 28 14 10 ME,SAM 18 03 11 46 WNA,ENA,E 74 31 13 38 WNA,ENA,E CC 06 14 26 A 35 13 12 18 WNA,H,ENA BD 22 13 54 SAF,SAM BC 29 14 42 ME,I,E D4 13 12 34 WNA,H,ENA BC 28 14 10 SAF,SAM CA 28 15 30 SAM 18 31 12 50 WNA,ENA,E BC 29 14 42 SAF,I,E BC 01 17 22 ME,SAM BC 22 13 6 SAF,ME,E A0 21 15 30 I,EA,E CC 22 17 38 A BD 22 13 54 SAF,ME BC 01 17 22 SAF,SAM A4 22 18 26 I,A BC 28 14 10 SAF,ME BC 11 18 58 SAF,I,E A5 22 18 42 I,A 18 11 15 14 WNA,ENA,E 74 04 20 18 WNA,ENA BC 11 18 58 ME,I,E CA 28 15 30 SAF BC 20 20 50 SAF,I,E CC 03 19 14 A 34 04 16 50 WNA,H,ENA A0 01 21 22 I,EA,E CC 31 20 34 A 35 04 17 6 WNA,H,ENA 74 24 21 54 WNA,ENA,E,SAM BC 20 20 50 ME,I,E BC 01 17 22 SAF,ME BC 08 22 10 SAF,SAM CD 31 21 6 A 18 07 18 10 WNA,ENA,E A0 19 22 58 I,EA,E BC 08 22 10 ME,SAM 19 07 18 26 WNA,ENA,E 74 10 23 30 WNA,ENA,E CC 11 22 42 A 74 24 21 54 WNA,ME,ENA,E 75 10 23 46 WNA,ENA,E D5 20 23 46 A BC 08 22 10 SAF,ME