23 October 2001 FA/GPSW.387 Dear Colleagues, Please find enclosed tracking schedule No. 37 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 52212 (30 October 2001) 00 h 00 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 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 11 at 00 h 10 should be entered in the AOA receivers at 00 h 08. 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 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 In the future, when all single-channel receivers are withdrawn from operation, the use of a fixed reference date for “all-in-view” observations by multi-channel receivers will allow us to cease publication of this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 37 * * for implementation on MJD 52212 (2001 October 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 TAI Participating laboratories Europe E AOS, BEV, CAO, CH, DLR, DTAG, IEN, IFAG, IPQ, LDS, LT*, NMC*, NPL, OMH, OP, ORB, PL*, PTB, ROA, SMU, SP, SU, TP, UME, VSL East North America ENA NRC, USNO West North America WNA CNM, NIST Hawaii H East Asia EA BIRM, CRL, CSAO, JATC, KRIS, NAO, NIM, NIMT*, NRLM, PSB, SCL, TL Australia and New Zealand A AUS, MSL India I NPLI Middle East ME ENIS*, INPL South Africa SAF CSIR South America SAM IGMA, ONBA, ONRJ * ENIS: Egyptian National Institute Of Standards, El-Haram-El-Giza, Egypt LT: Lithuanian National Metrology Institute, Vilnius, Lithuania NIMT: National Institute of Metrology (Thailand), Bangkok, Thailand NMC: National Centre of Metrology, Sofia, Bulgaria PL: Formerly GUM Other laboratories are designated by their usual acronyms (see Table 3 of the Annual Report of the BIPM Time Section, Volume 13, 2000). 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 37 (30 October 2001) *** Europe *** Class PRN Start Connects h m 18 11 0 10 WNA,ENA,SAM A0 21 0 26 ME,I,EA A1 21 0 42 ME,I,EA A2 21 0 58 ME,I,EA BC 29 1 14 SAF,ME,I A0 14 1 30 ME,I,EA A1 14 1 46 ME,I,EA A2 14 2 2 ME,I,EA A0 29 3 22 ME,I,EA BC 01 3 54 SAF,ME,SAM BC 11 4 10 SAF,ME,I BD 11 4 26 SAF,ME,I 18 07 4 42 WNA,ENA,SAM 74 04 6 2 WNA,ME,ENA BC 20 6 50 SAF,ME,I A0 01 7 6 ME,I,EA 18 24 7 22 WNA,ENA,SAM 74 24 7 38 WNA,ME,ENA,SAM 74 10 8 58 WNA,ME,ENA BC 28 9 46 SAF,ME,I A0 27 10 2 ME,I,EA BD 28 10 18 SAF,ME,I BC 10 10 50 SAF,ME,SAM 74 26 11 6 WNA,ME,ENA 18 23 12 10 WNA,ENA,SAM A0 28 12 26 ME,I,EA 18 09 12 42 WNA,ENA,SAM BD 07 12 58 SAF,ME,I 18 18 13 30 WNA,ENA,SAM 19 18 13 46 WNA,ENA,SAM BC 24 16 10 SAF,ME,I,EA 18 14 16 26 WNA,ENA,SAM BC 09 16 42 SAF,ME,I 18 29 16 58 WNA,ENA,SAM 19 29 17 14 WNA,ENA,SAM A0 24 17 30 ME,I,EA 74 25 18 34 WNA,ME,ENA,SAM BC 30 19 6 SAF,ME,I BD 30 19 22 SAF,ME,I D4 30 19 54 SAF,ME,I 74 22 20 22 WNA,ME,ENA 18 03 20 38 WNA,ENA,SAM 19 03 21 10 WNA,ENA,SAM D4 18 21 26 SAF,ME,I D5 18 21 42 SAF,ME,I A0 17 21 58 ME,I,EA A0 15 22 46 ME,I,EA A0 18 23 18 ME,I,EA GPS Schedule no 37 (30 October 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 18 11 0 10 WNA,E,SAM 18 11 0 10 ENA,E,SAM A0 21 0 26 ME,I,E 18 08 0 26 WNA,SAM 18 08 0 26 ENA,SAM A1 21 0 42 ME,I,E 34 02 0 42 WNA,H 34 02 0 42 H,ENA A2 21 0 58 ME,I,E 19 08 0 58 WNA,SAM 19 08 0 58 ENA,SAM A0 14 1 30 ME,I,E 34 07 1 30 WNA,H 34 07 1 30 H,ENA A1 14 1 46 ME,I,E 35 07 1 46 WNA,H 35 07 1 46 H,ENA A2 14 2 2 ME,I,E 34 04 2 34 WNA,H,SAM 34 04 2 34 H,ENA,SAM A0 29 3 22 ME,I,E 35 04 2 50 WNA,H,SAM 35 04 2 50 H,ENA,SAM AC 21 3 54 I,A D4 04 3 6 WNA,H,SAM D4 04 3 6 H,ENA,SAM 34 05 4 10 WNA,H,ENA 68 02 3 22 SAM 34 05 4 10 H,EA,ENA 35 05 4 26 WNA,H,ENA 69 02 3 38 SAM 35 05 4 26 H,EA,ENA 3C 06 4 42 A,H 34 05 4 10 WNA,H,EA 18 07 4 42 ENA,E,SAM 34 30 5 30 WNA,H 35 05 4 26 WNA,H,EA 34 30 5 30 H,EA 35 30 5 46 WNA,H,ENA 18 07 4 42 WNA,E,SAM 35 30 5 46 H,EA,ENA 34 06 6 34 WNA,H 68 07 4 58 SAM 74 04 6 2 ME,ENA,E 35 06 6 50 WNA,H,ENA 69 07 5 14 SAM 34 06 6 34 H,EA A0 01 7 6 ME,I,E 60 13 5 30 ME,SAM 35 06 6 50 H,EA,ENA AC 03 7 38 I,A 35 30 5 46 WNA,H,EA 18 24 7 22 ENA,E,SAM AD 03 7 54 I,A 74 04 6 2 WNA,ME,E 74 24 7 38 ME,ENA,E,SAM 34 17 8 26 WNA,H 35 06 6 50 WNA,H,EA D4 06 7 54 H,ENA 3C 25 8 42 A,H 18 24 7 22 WNA,E,SAM 34 17 8 26 H,EA 34 15 9 30 WNA,H,ENA 74 24 7 38 WNA,ME,E,SAM 74 10 8 58 ME,ENA,E A0 27 10 2 ME,I,E D4 06 7 54 WNA,H 34 23 9 14 H,ENA 3C 22 10 34 A,H 74 10 8 58 WNA,ME,E 34 15 9 30 H,EA,ENA AC 11 11 6 I,A 34 23 9 14 WNA,H D5 06 9 46 H,ENA,SAM 34 03 11 22 WNA,H 34 15 9 30 WNA,H,EA D6 06 10 2 H,ENA,SAM AD 11 11 38 I,A D5 06 9 46 WNA,H,SAM 34 18 10 50 H,ENA 35 03 11 54 WNA,H D6 06 10 2 WNA,H,SAM 74 26 11 6 ME,ENA,E A0 28 12 26 ME,I,E 34 18 10 50 WNA,H 34 03 11 22 H,EA 3C 20 13 46 A,H 74 26 11 6 WNA,ME,E 35 03 11 54 H,EA AC 28 15 22 I,A 18 23 12 10 WNA,E,SAM 18 23 12 10 ENA,E,SAM AD 28 15 38 I,A 18 09 12 42 WNA,E,SAM 18 09 12 42 ENA,E,SAM BC 24 16 10 SAF,ME,I,E 18 18 13 30 WNA,E,SAM 18 18 13 30 ENA,E,SAM 3C 13 16 26 A,H 19 18 13 46 WNA,E,SAM 19 18 13 46 ENA,E,SAM 34 20 16 42 WNA,H,ENA 60 05 14 34 ME,SAM 34 25 15 22 H,ENA 3D 13 16 58 A,H 34 25 15 22 WNA,H 18 14 16 26 ENA,E,SAM AC 07 17 14 I,A 18 14 16 26 WNA,E,SAM 34 20 16 42 H,EA,ENA A0 24 17 30 ME,I,E 34 20 16 42 WNA,H,EA 18 29 16 58 ENA,E,SAM 34 01 17 46 WNA,H,ENA 18 29 16 58 WNA,E,SAM 19 29 17 14 ENA,E,SAM 34 13 18 50 WNA,H 19 29 17 14 WNA,E,SAM 34 01 17 46 H,EA,ENA 35 13 19 22 WNA,H,ENA 34 01 17 46 WNA,H,EA 74 25 18 34 ME,ENA,E,SAM 3C 04 19 38 A,H 74 25 18 34 WNA,ME,E,SAM 34 13 18 50 H,EA 3D 04 19 54 A,H 35 13 19 22 WNA,H,EA 35 13 19 22 H,EA,ENA 3C 24 21 10 A,H 74 22 20 22 WNA,ME,E 74 22 20 22 ME,ENA,E 3D 24 21 26 A,H 18 03 20 38 WNA,E,SAM 18 03 20 38 ENA,E,SAM 34 08 21 42 WNA,H,ENA 19 03 21 10 WNA,E,SAM 19 03 21 10 ENA,E,SAM A0 17 21 58 ME,I,E 34 08 21 42 WNA,H,EA 34 08 21 42 H,EA,ENA A0 15 22 46 ME,I,E D4 13 22 30 WNA,H,SAM D4 13 22 30 H,ENA,SAM A0 18 23 18 ME,I,E GPS Schedule no 37 (30 October 2001) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 38 23 0 10 I CC 06 0 10 SAF 38 23 0 10 H 34 02 0 42 WNA,ENA CD 06 0 26 SAF A0 21 0 26 ME,EA,E 3C 05 0 58 A F9 05 0 42 A A1 21 0 42 ME,EA,E 34 07 1 30 WNA,ENA 3C 05 0 58 H A2 21 0 58 ME,EA,E 35 07 1 46 WNA,ENA F9 06 1 14 A BC 29 1 14 SAF,ME,E 34 04 2 34 WNA,ENA,SAM FA 06 1 30 A A0 14 1 30 ME,EA,E 35 04 2 50 WNA,ENA,SAM FB 06 1 46 A A1 14 1 46 ME,EA,E D4 04 3 6 WNA,ENA,SAM FC 06 2 2 A A2 14 2 2 ME,EA,E 34 05 4 10 WNA,EA,ENA FD 06 2 18 A A4 25 2 18 SAF 35 05 4 26 WNA,EA,ENA CC 22 3 22 SAF A5 25 2 34 SAF 3C 06 4 42 A,EA CD 22 3 38 SAF A0 29 3 22 ME,EA,E 34 30 5 30 WNA,EA AC 21 3 54 I,EA AC 21 3 54 A,EA 35 30 5 46 WNA,EA,ENA 3C 06 4 42 H,EA BC 11 4 10 SAF,ME,E 3C 15 6 18 A CC 03 4 58 SAF BD 11 4 26 SAF,ME,E 34 06 6 34 WNA,EA CC 31 5 46 SAF BC 20 6 50 SAF,ME,E 35 06 6 50 WNA,EA,ENA CD 31 6 2 SAF A0 01 7 6 ME,EA,E D4 06 7 54 WNA,ENA 3C 15 6 18 H AC 03 7 38 A,EA 34 17 8 26 WNA,EA D4 31 7 6 SAF AD 03 7 54 A,EA 3C 25 8 42 A,EA AC 03 7 38 I,EA BC 28 9 46 SAF,ME,E 34 23 9 14 WNA,ENA AD 03 7 54 I,EA A0 27 10 2 ME,EA,E 34 15 9 30 WNA,EA,ENA 3C 25 8 42 H,EA BD 28 10 18 SAF,ME,E D5 06 9 46 WNA,ENA,SAM CC 20 9 14 SAF AC 11 11 6 A,EA D6 06 10 2 WNA,ENA,SAM CD 20 9 30 SAF AD 11 11 38 A,EA 3C 22 10 34 A,EA D4 20 10 2 SAF BC 07 12 10 SAF,ME 34 18 10 50 WNA,ENA 3C 22 10 34 H,EA A0 28 12 26 ME,EA,E 34 03 11 22 WNA,EA AC 11 11 6 I,EA BD 07 12 58 SAF,ME,E 35 03 11 54 WNA,EA AD 11 11 38 I,EA 38 11 13 14 H 38 11 13 14 I CC 13 11 54 SAF D4 11 13 30 H D4 11 13 30 I CD 13 12 42 SAF A4 24 15 6 SAF 3C 20 13 46 A,EA 3C 20 13 46 H,EA AC 28 15 22 A,EA 3C 01 14 50 A 3C 01 14 50 H AD 28 15 38 A,EA 34 25 15 22 WNA,ENA AC 28 15 22 I,EA BC 24 16 10 SAF,ME,EA,E 3C 13 16 26 A,EA AD 28 15 38 I,EA BC 09 16 42 SAF,ME,E 34 20 16 42 WNA,EA,ENA CC 10 15 54 SAF AC 07 17 14 A,EA 3D 13 16 58 A,EA 3C 13 16 26 H,EA A0 24 17 30 ME,EA,E 34 01 17 46 WNA,EA,ENA 3D 13 16 58 H,EA 38 04 18 2 H 38 04 18 2 I AC 07 17 14 I,EA BC 30 19 6 SAF,ME,E 34 13 18 50 WNA,EA CC 26 17 46 SAF BD 30 19 22 SAF,ME,E 35 13 19 22 WNA,EA,ENA CD 26 18 18 SAF BC 23 19 38 SAF,ME 3C 04 19 38 A,EA D4 26 18 34 SAF D4 30 19 54 SAF,ME,E 3D 04 19 54 A,EA 3C 04 19 38 H,EA BC 18 20 38 SAF,ME D4 04 20 38 A 3D 04 19 54 H,EA 38 10 20 54 H 38 10 20 54 I CC 09 20 22 SAF BD 18 21 10 SAF,ME 3C 24 21 10 A,EA D4 04 20 38 H D4 18 21 26 SAF,ME,E 3D 24 21 26 A,EA 3C 24 21 10 H,EA D5 18 21 42 SAF,ME,E 34 08 21 42 WNA,EA,ENA 3D 24 21 26 H,EA A0 17 21 58 ME,EA,E D4 13 22 30 WNA,ENA,SAM 3C 10 23 34 H A0 15 22 46 ME,EA,E 3C 10 23 34 A D4 06 23 50 SAF A0 18 23 18 ME,EA,E GPS Schedule no 37 (30 October 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 21 0 26 I,EA,E CC 06 0 10 A 18 11 0 10 WNA,ENA,E A1 21 0 42 I,EA,E CD 06 0 26 A 18 08 0 26 WNA,ENA A2 21 0 58 I,EA,E BC 29 1 14 ME,I,E F8 20 0 42 SAM BC 29 1 14 SAF,I,E A4 25 2 18 I 19 08 0 58 WNA,ENA A0 14 1 30 I,EA,E A5 25 2 34 I FB 20 1 14 SAM A1 14 1 46 I,EA,E CC 22 3 22 A FC 20 1 30 SAM A2 14 2 2 I,EA,E CD 22 3 38 A FD 20 1 46 SAM A0 29 3 22 I,EA,E BC 01 3 54 ME,E,SAM F8 08 2 2 SAM BC 01 3 54 SAF,E,SAM BC 11 4 10 ME,I,E FB 08 2 18 SAM BC 11 4 10 SAF,I,E BD 11 4 26 ME,I,E 34 04 2 34 WNA,H,ENA BD 11 4 26 SAF,I,E CC 03 4 58 A 35 04 2 50 WNA,H,ENA 60 13 5 30 ENA,SAM CC 31 5 46 A D4 04 3 6 WNA,H,ENA 74 04 6 2 WNA,ENA,E CD 31 6 2 A 68 02 3 22 ENA BC 20 6 50 SAF,I,E BC 20 6 50 ME,I,E 69 02 3 38 ENA A0 01 7 6 I,EA,E D4 31 7 6 A BC 01 3 54 SAF,ME,E 74 24 7 38 WNA,ENA,E,SAM BC 04 7 54 ME,SAM F8 02 4 10 SAM BC 04 7 54 SAF,SAM BD 04 8 26 ME,SAM FB 02 4 26 SAM BD 04 8 26 SAF,SAM CC 20 9 14 A 18 07 4 42 WNA,ENA,E 74 10 8 58 WNA,ENA,E CD 20 9 30 A 68 07 4 58 ENA BC 28 9 46 SAF,I,E BC 28 9 46 ME,I,E 69 07 5 14 ENA A0 27 10 2 I,EA,E D4 20 10 2 A 60 13 5 30 ME,ENA BD 28 10 18 SAF,I,E BD 28 10 18 ME,I,E FC 02 5 46 SAM BC 10 10 50 SAF,E,SAM BC 10 10 50 ME,E,SAM F8 07 6 2 SAM 74 26 11 6 WNA,ENA,E BD 10 11 22 ME,SAM FB 07 6 18 SAM BD 10 11 22 SAF,SAM CC 13 11 54 A FC 07 6 34 SAM BC 07 12 10 SAF,I BC 07 12 10 ME,I 18 24 7 22 WNA,ENA,E A0 28 12 26 I,EA,E CD 13 12 42 A 74 24 7 38 WNA,ME,ENA,E BD 07 12 58 SAF,I,E BD 07 12 58 ME,I,E BC 04 7 54 SAF,ME 60 05 14 34 ENA,SAM A4 24 15 6 I BD 04 8 26 SAF,ME BC 24 16 10 SAF,I,EA,E CC 10 15 54 A D5 06 9 46 WNA,H,ENA BC 09 16 42 SAF,I,E BC 24 16 10 ME,I,EA,E D6 06 10 2 WNA,H,ENA A0 24 17 30 I,EA,E BC 09 16 42 ME,I,E BC 10 10 50 SAF,ME,E 74 25 18 34 WNA,ENA,E,SAM CC 26 17 46 A BD 10 11 22 SAF,ME BC 15 18 50 SAF,SAM CD 26 18 18 A 18 23 12 10 WNA,ENA,E BC 30 19 6 SAF,I,E D4 26 18 34 A 18 09 12 42 WNA,ENA,E BD 30 19 22 SAF,I,E BC 15 18 50 ME,SAM 18 18 13 30 WNA,ENA,E BC 23 19 38 SAF,I BC 30 19 6 ME,I,E 19 18 13 46 WNA,ENA,E D4 30 19 54 SAF,I,E BD 30 19 22 ME,I,E 60 05 14 34 ME,ENA 74 22 20 22 WNA,ENA,E BC 23 19 38 ME,I 18 14 16 26 WNA,ENA,E BC 18 20 38 SAF,I D4 30 19 54 ME,I,E 18 29 16 58 WNA,ENA,E BD 18 21 10 SAF,I CC 09 20 22 A 19 29 17 14 WNA,ENA,E D4 18 21 26 SAF,I,E BC 18 20 38 ME,I 74 25 18 34 WNA,ME,ENA,E D5 18 21 42 SAF,I,E BD 18 21 10 ME,I BC 15 18 50 SAF,ME A0 17 21 58 I,EA,E D4 18 21 26 ME,I,E 18 03 20 38 WNA,ENA,E A0 15 22 46 I,EA,E D5 18 21 42 ME,I,E 19 03 21 10 WNA,ENA,E BC 22 23 2 SAF,SAM BC 22 23 2 ME,SAM D4 13 22 30 WNA,H,ENA A0 18 23 18 I,EA,E BD 22 23 34 ME,SAM BC 22 23 2 SAF,ME BD 22 23 34 SAF,SAM D4 06 23 50 A BD 22 23 34 SAF,ME