Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3457

e)/(   ¾ ®  ¿ ° ° ¯ ¿ sin v ­ ­ ½ ° (1 e cos E )½° k e cos v E cos 1 e v  ­ ® k k cos ½ ¾ ¯ ¿ Eccentric anomaly Ik vk Ȧ Argument of latitude Second Harmonic erturbations įuk Cus sin 2Ik Cuc cos 2Ik Argument of latitude correction įrk Crc sin 2Ik Crs sin 2Ik Radius correction įik Cic cos 2Ik Cis sin 2Ik Inclination correction uk Ik įuk Corrected argument of latitude rk A(1 e cos Ek) įrk Corrected radius ik i0 įik (iDOT)tk Corrected inclination k k k k k k x r cos u y r sin u c ½ ¾ c ¿ Positions in orbital plane k e k e o ( )t : :  :  : :   e t Corrected longitude of ascending node k k k k k k k k k k k k k k k x x cos ȍ y cos i sin ȍ y x sin ȍ y cos i cos ȍ z y sin i c c  ½ ° c c  ¾ ° c ¿ Earth-centred, earth-fixed coordinates * t is GPS system time at time of transmission, i.e. GPS time corrected for transit time (range/speed of light). Furthermore, tk is the actual total time difference between the time t and the epoch time toe, and must account for beginning or end-of-week crossovers. That is, if tk is greater than 302 400 seconds, subtract 604 800 seconds from tk. If tk is less than 302 400 seconds, add 604 800 seconds to tk. A 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 3.1.3 AIRCRAFT ELEMENTS 3.1.3.1 NSS ( PS) RECEI ER 3.1.3.1.1 Satellite exclusion. The receiver shall exclude any satellite designated unhealthy by the GPS satellite ephemeris health flag. 3.1.3.1.2 Satellite trac ing. The receiver shall provide the capability to continuously track a minimum of four satellites and generate a position solution based upon those measurements. 3.1.3.1.3 Doppler shift. The receiver shall be able to compensate for dynamic Doppler shift effects on nominal SPS signal carrier phase and C/A code measurements. The receiver shall compensate for the Doppler shift that is unique to the anticipated application. 3.1.3.1.4 Resistance to interference. The receiver shall meet the requirements for resistance to interference as specified in Chapter 3, 3.7. 3.1.3.1.5 Application of cloc and ephemeris data. The receiver shall ensure that it is using the correct ephemeris and clock data before providing any position solution. The receiver shall monitor the IODC and IODE values, and to update ephemeris and clock databased upon a detected change in one or both of these values. The SPS receiver shall use clock and ephemeris data with corresponding IODC and IODE values for a given satellite. 3.1.4 TIME GPS time shall be referenced to a UTC (as maintained by the U.S. Naval Observatory) zero time-point defined as midnight on the night of 5 January 1980/morning of 6 January 1980. The largest unit used in stating GPS time shall be 1 week, defined as 604 800 seconds. The GPS time scale shall be maintained to be within 1 microsecond of UTC (Modulo 1 second) after correction for the integer number of leap seconds difference. The navigation data shall contain the requisite data for relating GPS time to UTC. 3 2 lobal na igation satellite system O ASS c annel of standard accuracy CSA Note In this section the term NASS refers to all satellites in the constellation Standards relating only to NASS M satellites are ualified accordingly 3.2.1 NON-AIRCRAFT ELEMENTS 3.2.1.1 RF C ARACTERISTICS 3.2.1.1.1 Carrier fre uencies The nominal value of L1 and carrier frequencies shall be as defined by the following expressions: fk1 f01 kǻf1 where k 7, , 0, 1, , 13 are carrier numbers (frequency channels) of the signals transmitted by GLONASS satellites in the L1 sub-band; f01 1 602 MHz; and 23/11/06 A 2007/70/II. szám A endix Annex 10 — Aeronautical Communications ǻf1 0.5625 MHz. Carrier frequencies shall be coherently derived from a common on-board time/frequency standard. The nominal value of frequency, as observed on the ground, shall be equal to 5.0 MHz. The carrier frequency of a GLONASS satellite shall be within 2 10 11 relative to its nominal value fk. Note The nominal values of carrier fre uencies for carrier numbers are given in Table Note For NASS M satellites the channel of standard accuracy (CSA) navigation signals will occupy the M M bandwidth as defined by the following expressions f f ǻf f M ǻf M For any given value of the ratio of carrier fre uencies of and sub bands will be e ual to f f able 1 carrier fre uencies Carrier number HA n (see 3.2.1.3.4) Nominal value of frequency in L1 sub-band (MHz) 13* 1 609.3125 12** 1 608.7500 11** 1 608.1875 10** 1 607.6250 09** 1 607.0625 08** 1 606.5000 07** 1 605.9375 06*** 1 605.3750 05*** 1 604.8125 1 604.2500 1 603.6875 1 603.1250 1 602.5625 1 602.0000 1 601.4375 1 600.8750 1 600.3125 1 599.7500 1 599.1875 1 598.6250 1 598.0625 * This frequency may be used for technical purposes over the Russian Federation before 2006 and is planned to be vacated after 2005. ** These frequencies are planned to be vacated after 2005. *** These frequencies may be used for technical purposes over the Russian Federation after 2005. A 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 3.2.1.1.2 Carrier phase noise. The phase noise spectral density of the unmodulated carrier shall be such that a phase locked loop of 10 Hz one-sided noise bandwidth provides the accuracy of carrier phase tracking not worse than 0.1 radian (1 sigma). 3.2.1.1.3 NASS pseudo random code generation. The pseudo-random ranging code shall be a 511-bit sequence that is sampled at the output of the seventh stage of a 9-stage shift register. The initialisation vector to generate this sequence shall be “111111111”. The generating polynomial that corresponds to the 9-stage shift register shall be: G(x) 1 x5 x9. 3.2.1.1.4 Spurious emissions. The power of the transmitted RF signal beyond the GLONASS allocated bandwidth shall not be more than 40 dB relative to the power of the unmodulated carrier. Note NASS satellites that are launched during to and beyond will use filters limiting out of band emissions to the harmful interference limit contained in CCIR Recommendation for the M band Note NASS satellites that are launched beyond will use filters limiting out of band emissions to the harmful interference limit contained in CCIR Recommendation for the M and M bands 3.2.1.1.5 Correlation loss. The loss in the recovered signal power due to imperfections in the signal modulation and waveform distortion shall not exceed 0.8 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 spacing and a M bandwidth 3.2.1.2 DATA STRUCTURE 3.2.1.2.1 eneral. The navigation message shall be transmitted as a pattern of digital data which are coded by Hamming code and transformed into relative code. Structurally, the data pattern shall be generated as continuously repeating superframes. The superframe shall consist of the frames and the frames shall consist of the strings. The boundaries of strings, frames and superframes of navigation messages from different GLONASS satellites shall be synchronized within 2 milliseconds. 3.2.1.2.2 Superframe structure. The superframe shall have a 2.5-minute duration and shall consist of 5 frames. Within each superframe a total content of non-immediate information (almanac for 24 GLONASS satellites) shall be transmitted. Note Superframe structure with indication of frame numbers in the superframe and string numbers in the frames is shown in Figure 3.2.1.2.3 Frame structure Each frame shall have a 30-second duration and shall consist of 15 strings. Within each frame the total content of immediate information (ephemeris and time parameters) for given satellite and a part of nonimmediate information (almanac) shall be transmitted. The frames 1 through 4 shall contain the part of almanac for 20 satellites (5 satellites per frame) and frame 5 shall contain the remainder of almanac for 4 satellites. The almanac for one satellite shall occupy two strings. Note Frame structures are shown in Figures and 3.2.1.2.4 String structure. Each string shall have a 2-second duration and shall contain binary chips of data and time mark. During the last 0.3 second within this 2-second interval (at the end of each string) the time mark shall be transmitted. The time mark (shortened pseudo-random sequence) shall consist of 30 chips with a time duration for each chip of 10 milliseconds and having the following sequence: 1 1 1 1 1 0 0 0 1 1 0 1 1 1 0 1 0 1 0 0 0 0 1 0 0 1 0 1 1 0. 23/11/06 A 2007/70/II. szám A endix Annex 10 — Aeronautical Communications During the first 1.7 seconds within this 2-second interval (in the beginning of each string) 85 bits of data (each data bit of a 20 milliseconds duration) shall be transmitted in bi-binary format. The numbers of bits in the string shall be increased from right to left. Along with information bits (bit positions 9 through 84) the check bits of Hamming code (KX) (bit positions 1 through 8) shall be transmitted. The Hamming code shall have a code length of 4. The data of one string shall be separated from the data of adjacent strings by time mark (MB). The words of the data shall be registered by MSB ahead. In each string bit position, 85 shall be an idle chip (“0”) and be transmitted first. 3.2.1.2.4.1 Strings through The information contained in strings 1 through 4 of each frame shall correspond to the satellite from which it is transmitted. This information shall not be changed within the superframe. 3.2.1.2.4.2 Strings through . Strings 5 through 15 of each frame shall contain GLONASS almanac for 4 or 5 satellites. The information contained in the fifth string shall be repeated in each frame of the superframe. Note String structure is given in Figure 3.2.1.3 DATA C NTENT 3.2.1.3.1 Ephemeris and time parameters The ephemeris and time parameters shall be as follows: m the string number within the frame; tk the time referenced to the beginning of the frame within the current day. It is calculated according to the satellite time scale. The integer number of hours elapsed since the beginning of the current day is registered in the 5 MSBs. The integer number of minutes elapsed since the beginning of the current hour is registered in the next 6 bits. The number of 30-second intervals elapsed since the beginning of the current minute is registered in the one LSB. The beginning of the day according to the satellite time scale coincides with the beginning of the recurrent superframe; tb the time interval within the current day according to UTC(SU) 03 hours 00 min. The immediate data transmitted within the frame are referred to the middle of tb. Duration of the time interval and therefore the maximum value of tb depends on the value of the flag P1; Ȗn(tb) the relative deviation of predicted carrier frequency value of n-satellite from the nominal value at the instant tb, i.e. n b Hn n b Hn f (t ) f (t ) , f  J t tb; tellite time tn relative to GLONASS time tc at an instant tb, xn(tb), yn(tb), zn(t where fn(tb) the forecast frequency of n-satellite clocks at an instan fHn the nominal value of frequency of n-satellite clocks; Ĳn(tb) the correction to the n-sa i.e. Ĳn(tb) tc(tb) tn(tb);

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