20 March 2002 FA/GPSW.388 Dear Colleagues, Please find enclosed tracking schedule No. 38 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 52366 ( 2 April 2002) 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 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 23 at 00 h 50 should be entered in the AOA receivers at 00 h 48. 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 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 In the future, when all single-channel receivers are withdrawn from operation, the use of a fixed reference date for “all-in-view” observations by multi-channel receivers will allow us to cease publication of this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 38 * * for implementation on MJD 52366 (2002 April 2) 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, JATC, KRIS, NAO, NIM, NIMT*, NMIJ*, NMLS*, NTSC*, SCL, SG*, TL Australia and New Zealand A AUS, MSL India I NPLI Middle East ME INPL South Africa SAF CSIR South America SAM IGMA, ONBA, ONRJ * NIMT: National Institute of Metrology (Thailand), Bangkok, Thailand NMIJ: Formerly NRLM NMLS: National Metrology Laboratory of SIRIM Berhard (Malaysia) NTSC: Formerly CSAO SG: Formerly PSB 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 class bytes are such that in association with the satellite number they form a unique identifyer for each common view. GPS Schedule no 38 ( 2 April 2002) *** Europe *** Class PRN Start Connects h m BC 28 0 2 SAF,ME,I A0 08 0 18 ME,I,EA A1 08 0 34 ME,I,EA 74 23 0 50 WNA,ME,ENA,SAM A2 08 1 6 ME,I,EA A3 08 1 22 ME,I,EA A0 28 1 38 ME,I,EA A1 28 1 54 ME,I,EA A2 28 2 10 ME,I,EA A3 28 2 26 ME,I,EA A0 07 2 58 ME,I,EA 18 18 3 14 WNA,ENA,SAM BC 09 5 22 SAF,ME,I BC 24 5 38 SAF,ME,I,EA 18 14 5 54 WNA,ENA,SAM D4 09 6 10 SAF,ME,I A0 24 6 58 ME,I,EA 74 25 7 46 WNA,ME,ENA,SAM BC 05 8 2 SAF,ME,I BC 30 8 18 SAF,ME,I BD 30 8 34 SAF,ME,I D4 30 8 50 SAF,ME,I BC 23 9 22 SAF,ME,I,EA 74 22 9 38 WNA,ME,ENA 18 03 10 22 WNA,ENA,SAM 19 03 10 38 WNA,ENA,SAM D4 18 10 54 SAF,ME,I D5 18 11 10 SAF,ME,I 74 02 11 26 WNA,ME,ENA,SAM BC 21 11 58 SAF,ME,I A0 15 12 14 ME,I,EA BD 22 12 30 SAF,ME,SAM A0 18 12 46 ME,I,EA 18 11 14 6 WNA,ENA,SAM A0 21 14 22 ME,I,EA 74 11 14 38 WNA,ME,ENA,SAM 18 28 15 26 WNA,ENA,SAM 18 07 17 18 WNA,ENA,SAM 19 07 17 34 WNA,ENA,SAM BC 11 17 50 SAF,ME,I 74 04 19 10 WNA,ME,ENA BC 20 19 58 SAF,ME,I 18 24 20 46 WNA,ENA,SAM 74 24 21 2 WNA,ME,ENA,SAM BC 04 21 18 SAF,ME,SAM 74 10 22 38 WNA,ME,ENA 18 26 23 26 WNA,ENA,SAM BD 28 23 42 SAF,ME,I GPS Schedule no 38 ( 2 April 2002) *** 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 29 0 2 WNA,H,SAM 34 29 0 2 H,ENA,SAM A0 08 0 18 ME,I,E 35 29 0 18 WNA,H,SAM 35 29 0 18 H,ENA,SAM A1 08 0 34 ME,I,E 34 18 0 34 WNA,H 34 18 0 34 H,ENA 3C 02 0 50 A,H 74 23 0 50 WNA,ME,E,SAM 74 23 0 50 ME,ENA,E,SAM A2 08 1 6 ME,I,E D4 29 1 6 WNA,H D4 29 1 6 H,ENA A3 08 1 22 ME,I,E 18 17 1 22 WNA,SAM 18 17 1 22 ENA,SAM A0 28 1 38 ME,I,E 18 15 1 38 WNA,SAM 18 15 1 38 ENA,SAM A1 28 1 54 ME,I,E 68 17 1 54 SAM 34 14 2 58 H,ENA A2 28 2 10 ME,I,E 69 17 2 10 SAM 18 18 3 14 ENA,E,SAM A3 28 2 26 ME,I,E 68 15 2 26 SAM 34 11 3 46 H,EA A0 07 2 58 ME,I,E 34 14 2 58 WNA,H 35 11 4 2 H,EA 3C 20 3 14 A,H 18 18 3 14 WNA,E,SAM D4 11 4 34 H,EA 34 11 3 46 WNA,H 68 18 3 30 SAM 34 20 5 6 H,EA 35 11 4 2 WNA,H 69 18 3 46 SAM 18 14 5 54 ENA,E,SAM D4 11 4 34 WNA,H 18 14 5 54 WNA,E,SAM 35 20 6 10 H,EA,ENA AC 28 4 50 I,A 35 20 6 10 WNA,H,EA 34 01 7 14 H,EA,ENA 34 20 5 6 WNA,H 34 01 7 14 WNA,H,EA 35 01 7 30 H,EA,ENA 3D 01 5 22 A,H 35 01 7 30 WNA,H,EA 74 25 7 46 ME,ENA,E,SAM BC 24 5 38 SAF,ME,I,E 74 25 7 46 WNA,ME,E,SAM 34 02 8 2 H,ENA,SAM 35 20 6 10 WNA,H,ENA 34 02 8 2 WNA,H,SAM 35 02 8 18 H,ENA,SAM 3D 13 6 26 A,H 35 02 8 18 WNA,H,SAM 34 13 8 34 H,EA,ENA D7 13 6 42 A,H 34 13 8 34 WNA,H,EA 35 13 8 50 H,EA,ENA A0 24 6 58 ME,I,E 35 13 8 50 WNA,H,EA 74 22 9 38 ME,ENA,E 34 01 7 14 WNA,H,ENA 74 22 9 38 WNA,ME,E 18 03 10 22 ENA,E,SAM 35 01 7 30 WNA,H,ENA 18 03 10 22 WNA,E,SAM 19 03 10 38 ENA,E,SAM 34 13 8 34 WNA,H,ENA 19 03 10 38 WNA,E,SAM 74 02 11 26 ME,ENA,E,SAM 35 13 8 50 WNA,H,ENA 74 02 11 26 WNA,ME,E,SAM D4 13 11 58 H,ENA,SAM 3C 04 9 6 A,H D4 13 11 58 WNA,H,SAM 34 08 13 50 H,ENA,SAM BC 23 9 22 SAF,ME,I,E 34 08 13 50 WNA,H,SAM 18 11 14 6 ENA,E,SAM 3D 04 9 38 A,H 18 11 14 6 WNA,E,SAM 74 11 14 38 ME,ENA,E,SAM AC 26 10 6 I,A 74 11 14 38 WNA,ME,E,SAM 18 28 15 26 ENA,E,SAM 3C 24 10 38 A,H 18 28 15 26 WNA,E,SAM 34 04 15 58 H,ENA,SAM 3D 24 10 54 A,H 34 04 15 58 WNA,H,SAM 35 04 16 14 H,ENA,SAM A0 15 12 14 ME,I,E 35 04 16 14 WNA,H,SAM 34 09 16 30 H,EA AC 09 12 30 I,A 18 07 17 18 WNA,E,SAM 18 07 17 18 ENA,E,SAM A0 18 12 46 ME,I,E 19 07 17 34 WNA,E,SAM 19 07 17 34 ENA,E,SAM 3C 10 13 2 A,H 34 05 17 50 WNA,H,EA 34 05 17 50 H,EA,ENA A0 21 14 22 ME,I,E 34 30 18 54 WNA,H,EA 34 30 18 54 H,EA,ENA 3C 05 14 38 A,H 74 04 19 10 WNA,ME,E 74 04 19 10 ME,ENA,E AC 18 15 58 I,A 34 06 20 14 WNA,H,EA 34 06 20 14 H,EA,ENA 34 09 16 30 WNA,H 35 06 20 30 WNA,H,EA 35 06 20 30 H,EA,ENA AC 21 17 2 I,A 18 24 20 46 WNA,E,SAM 18 24 20 46 ENA,E,SAM 34 05 17 50 WNA,H,ENA 74 24 21 2 WNA,ME,E,SAM 74 24 21 2 ME,ENA,E,SAM 34 30 18 54 WNA,H,ENA 74 10 22 38 WNA,ME,E 74 10 22 38 ME,ENA,E 34 06 20 14 WNA,H,ENA 34 15 22 54 WNA,H,EA 34 15 22 54 H,EA,ENA 35 06 20 30 WNA,H,ENA 18 26 23 26 WNA,E,SAM 18 26 23 26 ENA,E,SAM AC 03 21 2 I,A D5 29 23 42 WNA,H,SAM D5 29 23 42 H,ENA,SAM 3C 25 21 34 A,H D6 29 23 58 WNA,H,SAM D6 29 23 58 H,ENA,SAM 34 15 22 54 WNA,H,ENA GPS Schedule no 38 ( 2 April 2002) *** Hawaii *** *** Australia *** *** India *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m 34 29 0 2 WNA,ENA,SAM F9 11 0 2 A BC 28 0 2 SAF,ME,E 35 29 0 18 WNA,ENA,SAM CC 01 0 18 SAF A0 08 0 18 ME,EA,E 34 18 0 34 WNA,ENA F9 20 0 34 A A1 08 0 34 ME,EA,E 3C 02 0 50 A,EA 3C 02 0 50 H,EA A2 08 1 6 ME,EA,E D4 29 1 6 WNA,ENA CC 13 1 6 SAF A3 08 1 22 ME,EA,E 38 11 2 42 I CD 13 1 22 SAF A0 28 1 38 ME,EA,E 34 14 2 58 WNA,ENA D4 13 1 38 SAF A1 28 1 54 ME,EA,E 3C 20 3 14 A,EA D5 13 1 54 SAF A2 28 2 10 ME,EA,E 34 11 3 46 WNA,EA D6 13 2 10 SAF A3 28 2 26 ME,EA,E 35 11 4 2 WNA,EA F9 01 2 26 A 38 11 2 42 H 3C 01 4 18 A FA 01 2 42 A A0 07 2 58 ME,EA,E D4 11 4 34 WNA,EA FB 01 2 58 A AC 08 3 46 A 34 20 5 6 WNA,EA 3C 20 3 14 H,EA AC 28 4 50 A,EA 3D 01 5 22 A,EA FC 01 3 30 A AD 28 5 6 A 3C 13 5 38 A AC 08 3 46 I BC 09 5 22 SAF,ME,E 35 20 6 10 WNA,EA,ENA 3C 01 4 18 H BC 24 5 38 SAF,ME,EA,E 3D 13 6 26 A,EA AC 28 4 50 I,EA BD 09 5 54 SAF,ME D7 13 6 42 A,EA AD 28 5 6 I D4 09 6 10 SAF,ME,E 3C 27 6 58 A 3D 01 5 22 H,EA A0 24 6 58 ME,EA,E 34 01 7 14 WNA,EA,ENA 3C 13 5 38 H BC 05 8 2 SAF,ME,E 35 01 7 30 WNA,EA,ENA 3D 13 6 26 H,EA BC 30 8 18 SAF,ME,E 34 02 8 2 WNA,ENA,SAM D7 13 6 42 H,EA BD 30 8 34 SAF,ME,E 35 02 8 18 WNA,ENA,SAM 3C 27 6 58 H D4 30 8 50 SAF,ME,E 34 13 8 34 WNA,EA,ENA CC 26 7 14 SAF BC 23 9 22 SAF,ME,EA,E 35 13 8 50 WNA,EA,ENA 3C 04 9 6 H,EA AC 26 10 6 A,EA 3C 04 9 6 A,EA 3D 04 9 38 H,EA BC 18 10 22 SAF,ME 3D 04 9 38 A,EA AC 26 10 6 I,EA BD 18 10 38 SAF,ME 3C 24 10 38 A,EA 3C 24 10 38 H,EA D4 18 10 54 SAF,ME,E 3D 24 10 54 A,EA 3D 24 10 54 H,EA D5 18 11 10 SAF,ME,E D4 13 11 58 WNA,ENA,SAM CC 30 12 14 SAF BC 21 11 58 SAF,ME,E 3C 10 13 2 A,EA AC 09 12 30 I,EA A0 15 12 14 ME,EA,E 38 23 13 18 I 3C 10 13 2 H,EA AC 09 12 30 A,EA 34 08 13 50 WNA,ENA,SAM 3C 05 14 38 H,EA A0 18 12 46 ME,EA,E 3C 05 14 38 A,EA AC 18 15 58 I,EA 38 23 13 18 H 38 09 14 54 I AC 21 17 2 I,EA BC 14 13 50 SAF,ME 38 29 15 10 I CC 22 17 18 SAF A0 21 14 22 ME,EA,E 34 04 15 58 WNA,ENA,SAM A4 22 17 34 SAF,I 38 09 14 54 H 35 04 16 14 WNA,ENA,SAM CC 03 18 22 SAF 38 29 15 10 H 34 09 16 30 WNA,EA CC 31 19 42 SAF AC 18 15 58 A,EA 34 05 17 50 WNA,EA,ENA CD 31 20 30 SAF AC 21 17 2 A,EA 34 30 18 54 WNA,EA,ENA D4 31 20 46 SAF A4 22 17 34 SAF,A 34 06 20 14 WNA,EA,ENA AC 03 21 2 I,EA BC 11 17 50 SAF,ME,E 35 06 20 30 WNA,EA,ENA AD 03 21 18 I BC 20 19 58 SAF,ME,E 3C 25 21 34 A,EA 3C 25 21 34 H,EA AC 03 21 2 A,EA 34 15 22 54 WNA,EA,ENA CC 11 21 50 SAF AD 03 21 18 A 38 02 23 10 I CC 20 22 54 SAF 38 02 23 10 H D5 29 23 42 WNA,ENA,SAM CD 20 23 26 SAF BD 28 23 42 SAF,ME,E D6 29 23 58 WNA,ENA,SAM A4 01 23 58 SAF,I A4 01 23 58 SAF,A GPS Schedule no 38 ( 2 April 2002) *** Middle East *** *** South Africa *** *** South America *** Class PRN Start Connects Class PRN Start Connects Class PRN Start Connects h m h m h m BC 28 0 2 SAF,I,E BC 28 0 2 ME,I,E 34 29 0 2 WNA,H,ENA A0 08 0 18 I,EA,E CC 01 0 18 A 35 29 0 18 WNA,H,ENA A1 08 0 34 I,EA,E CC 13 1 6 A F8 05 0 34 SAM 74 23 0 50 WNA,ENA,E,SAM CD 13 1 22 A 74 23 0 50 WNA,ME,ENA,E A2 08 1 6 I,EA,E D4 13 1 38 A FB 05 1 6 SAM A3 08 1 22 I,EA,E D5 13 1 54 A 18 17 1 22 WNA,ENA A0 28 1 38 I,EA,E D6 13 2 10 A 18 15 1 38 WNA,ENA A1 28 1 54 I,EA,E CA 06 4 2 SAM 68 17 1 54 ENA A2 28 2 10 I,EA,E CB 06 4 18 SAM 69 17 2 10 ENA A3 28 2 26 I,EA,E BC 09 5 22 ME,I,E 68 15 2 26 ENA A0 07 2 58 I,EA,E BC 24 5 38 ME,I,EA,E FC 05 2 42 SAM BC 09 5 22 SAF,I,E BD 09 5 54 ME,I FD 05 2 58 SAM BC 24 5 38 SAF,I,EA,E D4 09 6 10 ME,I,E 18 18 3 14 WNA,ENA,E BD 09 5 54 SAF,I BC 06 6 26 ME,SAM 68 18 3 30 ENA D4 09 6 10 SAF,I,E CC 26 7 14 A 69 18 3 46 ENA BC 06 6 26 SAF,SAM BC 05 8 2 ME,I,E CA 06 4 2 SAF A0 24 6 58 I,EA,E BC 30 8 18 ME,I,E CB 06 4 18 SAF 74 25 7 46 WNA,ENA,E,SAM BD 30 8 34 ME,I,E F8 06 4 34 SAM BC 05 8 2 SAF,I,E D4 30 8 50 ME,I,E 18 14 5 54 WNA,ENA,E BC 30 8 18 SAF,I,E BC 23 9 22 ME,I,EA,E BC 06 6 26 SAF,ME BD 30 8 34 SAF,I,E BC 18 10 22 ME,I 74 25 7 46 WNA,ME,ENA,E D4 30 8 50 SAF,I,E BD 18 10 38 ME,I 34 02 8 2 WNA,H,ENA BC 23 9 22 SAF,I,EA,E D4 18 10 54 ME,I,E 35 02 8 18 WNA,H,ENA 74 22 9 38 WNA,ENA,E D5 18 11 10 ME,I,E 18 03 10 22 WNA,ENA,E BC 18 10 22 SAF,I BC 22 11 42 ME,SAM 19 03 10 38 WNA,ENA,E BD 18 10 38 SAF,I BC 21 11 58 ME,I,E 74 02 11 26 WNA,ME,ENA,E D4 18 10 54 SAF,I,E CC 30 12 14 A BC 22 11 42 SAF,ME D5 18 11 10 SAF,I,E BD 22 12 30 ME,E,SAM D4 13 11 58 WNA,H,ENA 74 02 11 26 WNA,ENA,E,SAM D4 22 13 2 ME,SAM BD 22 12 30 SAF,ME,E BC 22 11 42 SAF,SAM BC 02 13 18 ME,SAM D4 22 13 2 SAF,ME BC 21 11 58 SAF,I,E BD 02 13 34 ME,SAM BC 02 13 18 SAF,ME A0 15 12 14 I,EA,E BC 14 13 50 ME,I BD 02 13 34 SAF,ME BD 22 12 30 SAF,E,SAM CA 02 14 22 SAM 34 08 13 50 WNA,H,ENA A0 18 12 46 I,EA,E BC 01 16 46 ME,SAM 18 11 14 6 WNA,ENA,E D4 22 13 2 SAF,SAM CC 22 17 18 A CA 02 14 22 SAF BC 02 13 18 SAF,SAM A4 22 17 34 I,A 74 11 14 38 WNA,ME,ENA,E BD 02 13 34 SAF,SAM BC 11 17 50 ME,I,E 18 28 15 26 WNA,ENA,E BC 14 13 50 SAF,I CC 03 18 22 A 34 04 15 58 WNA,H,ENA A0 21 14 22 I,EA,E CC 31 19 42 A 35 04 16 14 WNA,H,ENA 74 11 14 38 WNA,ENA,E,SAM BC 20 19 58 ME,I,E BC 01 16 46 SAF,ME BC 01 16 46 SAF,SAM CD 31 20 30 A 18 07 17 18 WNA,ENA,E BC 11 17 50 SAF,I,E D4 31 20 46 A 19 07 17 34 WNA,ENA,E 74 04 19 10 WNA,ENA,E BC 04 21 18 ME,E,SAM 18 24 20 46 WNA,ENA,E BC 20 19 58 SAF,I,E CC 11 21 50 A 74 24 21 2 WNA,ME,ENA,E 74 24 21 2 WNA,ENA,E,SAM CC 20 22 54 A BC 04 21 18 SAF,ME,E BC 04 21 18 SAF,E,SAM CD 20 23 26 A 18 26 23 26 WNA,ENA,E 74 10 22 38 WNA,ENA,E BD 28 23 42 ME,I,E D5 29 23 42 WNA,H,ENA BD 28 23 42 SAF,I,E A4 01 23 58 I,A D6 29 23 58 WNA,H,ENA