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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 clock 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 Global navigation satellite system (GLONASS)
channel of standard accuracy (CSA) (L1)
Note.— In this section the term GLONASS refers to all satellites in the constellation. Standards relating only to
GLONASS-M satellites are qualified accordingly.
3.2.1 NON-AIRCRAFT ELEMENTS
3.2.1.1 RF CHARACTERISTICS
3.2.1.1.1 Carrier frequencies. The nominal value of L1 and carrier frequencies shall be as defined by the following
expressions:
fk1 = f01 + kΔf1
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 APP B-18
Appendix B Annex 10 — Aeronautical Communications
Δf1 = 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 1.— The nominal values of carrier frequencies for carrier numbers k are given in Table B-16.
Note 2.— For GLONASS-M satellites, the L2 channel of standard accuracy (CSA) navigation signals will occupy the
1 242.9375 – 1 251.6875 MHz ±0.511 MHz bandwidth as defined by the following expressions:
fk2 = f02 + kΔf2,
f02 = 1 246 MHz; Δf2 = 0.4375 MHz.
For any given value of k the ratio of carrier frequencies of L1 and L2 sub-bands will be equal to:
k2
k1
f 7
f 9
=
Table B-16. L1 carrier frequencies
Carrier number
HA
n
(see 3.2.1.3.4)
Nominal value of
frequency in L1 sub-band
(MHz)
13* 13 1 609.3125
12** 12 1 608.7500
11** 11 1 608.1875
10** 10 1 607.6250
09** 9 1 607.0625
08** 8 1 606.5000
07** 7 1 605.9375
06*** 6 1 605.3750
05*** 5 1 604.8125
4 4 1 604.2500
3 3 1 603.6875
2 2 1 603.1250
1 1 1 602.5625
0 0 1 602.0000
–1 31 1 601.4375
–2 30 1 600.8750
–3 29 1 600.3125
–4 28 1 599.7500
–5 27 1 599.1875
–6 26 1 598.6250
–7 25 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.
APP B-19 23/11/06
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 GLONASS 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
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