Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3449

b) for all other pages the satellite ID assigned in accordance with Table B-7 shall serve as the “page ID”. IDs 1 through 32 shall be assigned to those pages which contain the almanac data of specific satellites (pages 1 through 24 of subframe 5 and pages 2 through 5, and 7 through 10 of subframe 4). The “0” ID (binary all zeros) shall be assigned to indicate a dummy satellite, while IDs 51 through 63 shall be utilized for pages containing other than almanac data for a specific satellite (Notes 1 and 2). Note Specific IDs are reserved for each page of subframes and however the satellite ID of pages and of subframe may change for each page to reflect the alternate contents for that page Note The remaining IDs ( through ) are unassigned able Data Ds and satellite Ds in subframes and Subframe 4 Subframe 5 Page Data ID Satellite ID* Data ID Satellite ID* *** ** 2**** ** ** 3**** ** ** 4**** ** ** 5**** ** ** *** ** 7**** ** ** 8**** ** ** 9**** ** ** 10**** ** ** *** ** *** ** *** ** *** ** *** ** *** ** *** ** *** ** *** 58***** ** *** 59***** ** *** ** *** 60***** ** *** 61***** ** *** ** *** *** * “0” indicates “dummy” satellite. When using “0” to indicate a dummy satellite, the data ID of the transmitting satellite is used. ** Data ID of that satellite whose satellite ID appears in that page. *** Data ID of transmitting satellite. **** Pages 2, 3, 4, 5, 7, 8, 9 and 10 of subframe 4 may contain almanac data for satellites 25 through 32, respectively, or data for other functions as identified by a different satellite ID from the value shown. ***** Satellite ID may vary. A 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 3.1.1.3.3.3 Almanac Pages 1 through 24 of subframe 5, as well as pages 2 through 5 and 7 through 10 of subframe 4 shall contain the almanac data and a satellite health status word (3.1.1.3.3.4) for up to 32 satellites. The almanac data shall be a reduced-precision subset of the clock and ephemeris parameters. The data shall occupy all bits of words 3 through 10 of each page except the 8 MSBs of word 3 (data ID and satellite ID), bits 17 through 24 of word 5 (satellite health), and the 50 bits devoted to parity. The number of bits, the scale factor (LSB), the range and the units of the almanac parameters shall be as indicated in Table B-8. The almanac message for any dummy satellite shall contain alternating “ones” and “zeros” with a valid parity. 3.1.1.3.3.3.1 Almanac reference time The almanac reference time, toa, shall be a multiple of 212 seconds occurring approximately 70 hours after the first valid transmission time for this almanac data set. The almanac shall be updated often enough to ensure that GPS time, t, will differ from toa by less than 3.5 days during the transmission period. The almanac parameters shall be updated at least once every 6 days during normal operations. 3.1.1.3.3.3.2 Almanac time parameters The almanac time parameters shall consist of an 11-bit constant term (af0) and an 11-bit first order term (af1). 3.1.1.3.3.3.3 Almanac reference wee Bits 17 through 24 of word 3 in page 25 of subframe 5 shall indicate the number of the week (WNa) to which the almanac reference time (toa) is referenced. The WNa term shall consist of the 8 LSBs of the full week number. Bits 9 through 16 of word 3 in page 25 of subframe 5 shall contain the value of toa that is referenced to this WNa. 3.1.1.3.3.4 ealth summary Subframes 4 and 5 shall contain two types of satellite health data:

Source: https://magyarkozlony.hu/hivatalos-lapok/7e70cec03f34e3c2efd8610b865b65591eafd701/dokumentumok/a55dc160549d57fa4db0035e37c6a6a98dd1a0b9/letoltes