Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3453

b) notice to the user regarding the scheduled future or past (relative to navigation message upload) value of the delta time due to leap seconds (tLSF), together with the week number (WNLSF) and the day number (DN) at the end of which the leap second becomes effective. “Day one” shall be the first day relative to the end/start of week and the WNLSF value consists of the 8 LSBs of the full week number. The absolute value of the difference between the untruncated WN and WNLSF values shall not exceed 127. Note The user is expected to account for the truncated nature of this parameter as well as truncation of N Nt and N SF due to rollover of the full wee number ( ) 3.1.1.3.3.6.1 The 24 MSBs of words 6 through 9, and the 8 MSBs of word 10 in page 18 of subframe 4 shall contain the parameters related to correlating UTC time with GPS time. The bit length, scale factors, ranges, and units of these parameters shall be as specified in Table B-11. 3.1.1.3.3.7 Ionospheric parameters. The ionospheric parameters that allow the GPS SPS user to utilize the ionospheric model for computation of the ionospheric delay shall be contained in page 18 of subframe 4 as specified in Table B-12. 3.1.1.3.3.8 Special message Page 17 of subframe 4 shall be reserved for special messages. 23/11/06 A 2007/70/II. szám A endix Annex 10 — Aeronautical Communications able C parameters Parameter Number of bits** Scale factor (LSB) Effective range*** Units Ao 32* 2 30 seconds A1 24* 2 50 seconds/second ǻtLS 8* seconds tot 602 112 seconds WNt weeks WNLSF weeks DN 8**** days ǻtLSF 8* seconds * Parameters so indicated are two s complement, with the sign bit ( or ) occupying the MSB. ** See Figure B-6 for complete bit allocation in subframe. *** Unless otherwise indicated in this column, effective range is the maximum range attainable with the indicated bit allocation and scale factor. **** Right justified. able onosp eric parameters Parameter Number of bits** Scale factor (LSB) Effective range*** Units Į0 8* 2 30 seconds Į1 8* 2 27 seconds/semi-circle Į2 8* 2 24 seconds/semi-circle2 Į3 8* 2 24 seconds/semi-circle3 ȕ0 8* seconds ȕ1 8* seconds/semi-circle ȕ2 8* seconds/semi-circle2 ȕ3 8* seconds/semi-circle3 * Parameters so indicated are two s complement, with the sign bit ( or ) occupying the MSB. ** See Figure B-6 for complete bit allocation in subframe. *** Unless otherwise indicated in this column, effective range is the maximum range attainable with the indicated bit allocation and scale factor. 3.1.1.3.3.9 Reserved data fields All bits of words 3 through 10, except the 58 bits used for data ID, satellite (page) ID, parity (six LSBs of each word) and parity computation (bits 23 and 24 of word 10) of pages 1, 6, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23 and 24 of subframe 4, and those almanac pages assigned satellite ID of zero shall be designated as reserved. Other reserved bits in subframes 4 and 5 shall be as shown in Table B-13. Reserved bit positions of each word shall contain a pattern of alternating ones and zeros with a valid word parity. 3.1.2 DEFINITIONS OF PROTOCOLS FOR DATA APPLICATION Note This section defines the inter relationships of the data broadcast message parameters It provides definitions of parameters that are not transmitted but are used by either or both non aircraft and aircraft elements and that define terms applied to determine the navigation solution and its integrity A 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I able Reser ed bits in subframes and Subframe Pages Words Reserved bit position in word 17 22 19 22 17 18 19 22 14 22 able arity encoding algorit ms D1 d1  D* D2 d2  D* D3 d3  D* D24 d24  D* D25 D* 29  d1  d2  d3  d5  d6  d10  d11  d12  d13  d14  d17  d18  d20  d23 D26 D* 30  d2  d3  d4  d6  d7  d11  d12  d13  d14  d15  d18  d19  d21  d24 D27 D* 29  d1  d3  d4  d5  d7  d8  d12  d13  d14  d15  d16  d19  d20  d22 D28 D* 30  d2  d4  d5  d6  d8  d9  d13  d14  d15  d16  d17  d20  d21  d23 D29 D* 30  d1  d3  d5  d6  d7  d9  d10  d14  d15  d16  d17  d18  d21  d22  d24 D30 D* 29  d3  d5  d6  d8  d9  d10  d11  d13  d15  d19  d22  d23  d24 where: D1, D2, D3, ... D29, D30 are the bits transmitted by the satellite; D25, ... D30 are the computed parity bits; d1, d2, ... d24 are the source data bits;  is the Modulo-2 or “Exclusive-Or” operation; and * is used to identify the last two bits of the previous word of the subframe. 3.1.2.1 Parity algorithm. GPS parity algorithms are defined as indicated in Table B-14. 3.1.2.2 Satellite cloc correction parameters GPS system time t is defined as: t tsv (ǻtsv)L1 where t GPS system time (corrected for beginning and end-of-week crossovers); tsv satellite time at transmission of the message; (ǻtsv)L1 the satellite PRN code phase offset; (ǻtsv)L1 af0 af1(t toc) af2(t toc)2 ǻtr TGD 23/11/06 A 2007/70/II. szám A endix Annex 10 — Aeronautical Communications where af0, af1 and af2 and toc, are contained in subframe 1; and ǻtr the relativistic correction term (seconds) ǻtr Fe A sin Ek where e and A are contained in subframes 2 and 3; Ek is defined in Table B-15; and 2 ( ) F c2 4.442807633(10) 10 s/m where WGS-84 universal gravitational parameter (3.986005 1014 m3/s2) c the speed of light in a vacuum (2.99792458 108 m/s) Note The value of t is intended to account for the beginning or end of wee crossovers That is if the uantity t toc is greater than seconds subtract seconds from t If the uantity t toc is less than seconds add seconds to t 3.1.2.3 Satellite position The current satellite position (Xk, Yk,

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