Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3470

b) G2: stages 2, 3, 6, 8, 9 and 10. The initial state for the G1 and G2 shift registers shall be “1111111111”. 3.5.2.3 Spurious emissions. Spurious emissions shall be at least 40 dB below the unmodulated carrier power over all frequencies. 3.5.2.4 Code carrier fre uency coherence. The short-term (less than 10 seconds) fractional frequency difference between the code phase rate and t (l m tiplying the number of code chips by 1 540, and the change in the broadcast carrier phase, in cycles, shall be within one carrier cycle (standard deviation). Note This applies to the output of the satellite transmit antenna and does not include code carrier divergence due to ionospheric refraction in the downlin propag 3.5.2.5 Correlation loss. The loss in the recovered signal power due to imperfections in the signal modulation and waveform distortion shall not exceed 1 dB. Note The loss in signal power is the difference between the broadcast power in a M bandwidth and the signal power recovered by a noise free loss free receiver with chip correlator spa 3.5.2.6 Maximum code phase deviation. The maximum uncorrected code phase of the broadcast signal shall n fr 3.5.2.7 Code data coherence. Each 2-millisecond symbol shall be synchronous with every o 3.5.2.8 Message synchroni ation. The leading edge of the first symbol that depends on the first bit of the current message shall be broadcast from the SBAS satellite synchronous with a 1-second epoch of SNT. 3.5. a arrangement shall be as illustrated in Figure B-11 with the G3 output selected for the first half of each 4-millisecond data bit period. 3.5.2.10 Pseudo random noise (PRN) codes. Each PRN code shall be a 1 023-bit Gold code which is itself the Modulo-2 addition of two 1 a of stage 10 of a 10-stage shift regis th 23/11/06 A 2007/70/II. szám A endix Annex 10 — Aeronautical Communications able 23 S AS R cod er G2 delay ( (Leftm trans ary) codes PRN e numb chips) First 10 SBAS chips ost bit presents first mitted chip, bin re 110111001 101011110 111111000 1011010111 101001000 1101100101 110000 111000001 1000110000 10100101 101010111 1100011110 1001011 1010101111 100110 1000111001 101110001 1000011111 3.5.3.1 Format summary. All messages shall consist of a message type identifier, a preamble, a data field and a cyclic 3.5.3.2 Preamble The preamble shall consist of the sequence of bits “01010011 10011010 11000110”, distributed over 3.5.3.3 Message type identifier The message type identifier shall be a 6-bit value identifying the message type (Types 3.5.3.4 Data field. The data field shall be 212 bits as defined in 3.5.6. Each data field parameter shall be transmitted SB e CRC code shall be calculated in accordance with 3.9. 4 bits. 3.5.3.5.2 The CRC G(x) x24 x23 x x x x x x x x4 x3 x 1 3.5.3 DATA STRUCTURE redundancy check as illustrated in Figure B-12. three successive blocks. The start of every other 24-bit preamble shall be synchronous with a 6-second GPS subframe epoch. 0 to 63) as defined in Table B-24. The message type identifier shall be transmitted MSB first. M first. 3.5.3.5 Cyclic redundancy chec (CRC) The SBAS messag 3.5.3.5.1 The length of the CRC code shall be k 2 generator polynomial shall be: x A 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I able roadcast mes es Message type sage typ Contents “Do Not Use” (SBAS test mode) y information nging function parameters offset parameters tellite almanacs ror corrections corrections service message meris covariance matrix Reserved Null message PRN mask to 5 Fast corrections Integrit Fast correction degradation factor Spare GEO ra Degradation parameters Spare SBAS network time/UTC to 1 Spare GEO sa Ionospheric grid point masks to 2 Spare Mixed fast/long-term satellite er Long-term satellite error Ionospheric delay corrections SBAS Clock-ephe to 6 Spare 3.5.3.5.3 The CRC information field, M(x), shall be: eld it of the preamble, and m226 corresponds to bit 212 of the data field. 3.5.3.5.5 The CRC code r-bits shall be order bit transmitted and r24 is the last bit transmitted. RN that uniquely identifies the satellite PRN code and related assignments as shown in Table B-25. ask shall set up to 51 of the 210 PRN mask values. Note The first transmitted bit o orresponds to PR er 226 i i i 1 M(x) m x m x m x m x     ¦ ! 3.5.3.5.4 M(x) shall be formed from the 8-bit SBAS message preamble, 6-bit message type identifier, and 212-bit data . Bits shall be arranged in the order transmitted from the SBAS satellite, such that m corresponds to the first transmitted fi b ed such that r1 is the first 3.5.4 DATA CONTENT 3.5.4.1 PRN mas parameters. PRN mask parameters shall be as follows: code number a number P PRN mas 210 PRN mask values t The m hat correspond to satellite PRN code numbers. f the PRN mas c N code numb 23/11/06 A 2007/70/II. szám A endix Annex 10 — Aeronautical Communications able R code number assignments PR er As N code numb signment 1 37 38 61 GPS lot num GLONASS s ber plus 37 62 119 Spare 120 138 SBAS 139 210 Spare PRN mas value a bit in the PRN mask (1 to 210). indicating whether data are provided for the associated satellite PRN code number RN number for which the PRN mas value is data a PRN mask. ot es) in Type message s 3.5.4.2 ing function parameters GEO ranging function parameters shall be as follows: oding: 0 data not provided C data provided PRN mas number the sequence number (1 to 51) of the mask values set in the PRN mask. Note The PRN mas number is for the lowest satellite P Issue of PRN (I DP) an indicator that associates the correction data with N e Parameters are broadcast in the following messages

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