EGNOS SIGNALER I NORRA SVERIGE

Transkript

1 EGNOS SIGNALER I NORRA SVERIGE Christer Ullvetter Sakkunnig OPS & NAV Transportstyrelsens Luftfartsavdelning Flygdriftenheten

2 RTCA DO229D MOPS (Min Ops Perf Stds) for WAAS Message Timeout Periods For approach LNAV/VNAV, LP, and LPV when no valid SBAS message has been received for 4 seconds, all UDREI data from that WAAS/EGNOS satellite shall timeout. Timeout interval for UDREI when used for Approach (LNAV/VNAV, LP, and LPV) is 12 seconds. Integrity warning when receiver is used for approach LNAV/VNAV, LP, and LPV is 6 seconds (= samma som för ILS CAT I) Således kan ett kort avbrott i signalen ske utan att navigationen påverkas. Men en Loss of Integrity varning visas för piloten. Och detta kan ställa till problem. Se nästa bild.

3 EASA CRD to NPA AMC SBAS Appendix 3: LPV Approach Operational Procedures 1.3 During the Procedure The system provides lateral and vertical guidance relative to the LPV Final Approach Segment or to the extended final approach segment (for the direct transition). The crew must check that the GNSS approach mode indicates LPV (or an equivalent annunciation) 2 NM before the FAP. Prior to passing the FAP, the procedure must be discontinued or may be continued to LNAV minima when supported by the system if there is: Loss of integrity/loss of Navigation is indicated by a warning annunciator (e.g. absence of power, equipment failure). After passing the FAP, the procedure must be discontinued, unless the aircraft is still above ft AGL, the pilot may decide to continue the approach to LNAV minima. Således viktigt att inte få en Loss of Integrity varning efter passage av 2 NM före FAP (Final Approach Point = där glidbanan börjar). Vid insväng till inflygningslinjen från norr kan behov finnas för cirka 0,5-1 NM längre anflygning jfrt med insväng från söder!

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5 GIANT trials over North Sea Sept 2008 The flight test with a helicopter demonstrated the reception of all EGNOS satellite signals at Aberdeen. However, when airborne and undertaking dynamic manoeuvres up to 15 bank angles, there is clear evidence of obscuration of satellites due to the airframe. Geostationary Satellite C/No Measurements PRN 120 PRN 124 PRN C/No (db) dB fade , , , , , , , , ,500 GPS seconds in week

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11 Norrköping N E SV120/elev 18 & SV126/elev 23

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13 Kiruna N E SV120/elev 9 7 sek avbrott => SBAS Loss of Integrity, men SBAS Nav OK

14 Kiruna antenn 15 8 avbrott i max 14 sek => SBAS Loss of Integrity, men SBAS Nav OK

15 Kiruna antenn 30 5 avbrott i max 27 sek => SBAS Loss of Integrity & SBAS Loss of Nav

16 Gällivare N E SV120/elev 10 6 sek avbrott => SBAS Loss of Integrity, men SBAS Nav OK

17 Gällivare antenn 30 4 sek avbrott => SBAS Loss of Integrity, men SBAS Nav OK

18 Gällivare Dundret N E 750 m höjd SV120/elev 10 Inga avbrott => SBAS Integrity & Nav OK

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20 Pajala N E SV120/elev 9 Integrity, men SBAS Nav OK 8 sek avbrott => SBAS Loss of

21 Pajala antenn 15 SV120 9 avbrott i max 66 sek => SBAS Loss of Integrity & SBAS Loss of Nav Ej användbar signal!

22 Pajala antenn 30 SV120 Ej användbar signal!

23 Luleå N E SV120/elev 10 Integrity & 32 sek SBAS Loss of Nav 46 sek avbrott => SBAS Loss of

24 Luleå hamn N E SV120/elev 11 SBAS Integrity & Nav OK

25 Skellefteå N E SV120/elev 12 SV126/elev 17 SBAS Integrity & SBAS Nav OK Nordligaste SV120 & SV126 utan avbrott

26 Arvidsjaur N E SV120/elev 11 SBAS Integrity & Nav OK

27 Hemavan N 15 04E SV126/elev 15 SBAS Integrity & Nav OK

28 Storuman N 17 40E SV120/elev 12 SBAS Integrity & Nav OK

29 Vilhelmina N E SV120/elev 13 SV126/elev 17 SBAS Integrity & Nav OK

30 Lycksele N E SV120/elev 12 SV126/elev 17 har 9 sek och 22 sek avbrott, men SV120 har täckning då => SBAS Integrity & Nav OK

31 Umeå N E SV120/elev 13 SBAS Integrity & Nav OK

32 Ö-vik N E SV120/elev 13 SV126/elev 18 SBAS integrity & Nav OK

33 Kramfors N E SV120/elev 14 SBAS Integrity & Nav OK

34 Sundsvall N E SV120/elev 14 SV126/elev sek och 7 sek avbrott, men SV120 har täckning då. SBAS Integrity & Nav OK

35 Östersund N E SV120/elev 15 SV126/elev sek avbrott, men SV120 har täckning då. SBAS Integrity & Nav OK

36 Sveg N E SV120/elev 15 SV126/elev 19 SV120 har 7 sek avbrott, men SV126 har täckning då. SBAS Integrity & Nav OK

37 Mora N E SV120/elev 17 SV126/elev 20 SBAS Integrity & Nav OK

38 Borlänge N E SV120/elev 17 SV126 unusable SBAS Integrity & Nav OK

39 Hagfors N E SV120/elev 18 SV126/elev 21 SBAS Integrity & Nav OK

40 Torsby N E SV120/elev 18 SV126/elev 21 SBAS Integrity & Nav OK

41 Arvika N E SV120/elev 18 SV126/elev 22 SBAS Integrity & Nav OK

42 Utrustning för monitorering av EGNOS signaler PC med Windows eller Linux og Internettilkobling Septentrio AsteRx2e HDC (dual-frequency GPS) inkl. AC/DC power supply. PC interface RS-232 (x2) og USB. Pris ca. NOK Dette er den rimeligste dual-frequency mottageren fra Septentrio. Septentrio dual-frequency geodetic antenna. Pris ca. NOK I tillegg coaxial kabel for antenne og antennemast. For utleie av tilsvarende utrustning inkl. Laptop PC og software (for lokale undersøkelser) kan jeg antyde NOK pr. uke. (minimum 6 månader/26 uker total leietid pr. år). Dersom det er ønskelig med en enkel og brukervennlig software applikasjon (GUI) for monitorering, kan NavSys effektivt utvikle denne etter deres spesifikasjoner.

43 Christer Ullvetter Sakkunnig OPS & NAV Transportstyrelsen Luftfartsavdelningen