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dV z 3J a z1 5z
dt r 2 r r
μ μ ⎛ ⎞
=− − ⎜ − ⎟+z
⎝ ⎠
where
r = x2+y2+z2;
μ = earth’s universal gravitational constant (398 600.44 10 m /s );
a
× 9 3 2
2 × )
earth’s rotation rate (7.292115 × 10–5 radians/s).
oordinates xn(tb), yn(tb), zn(tb), and velocity vector components (tb) = Vx (tb) = Vy (tb) = Vz are initial conditions
integration. Accelerations due to luni-so b) are constant on the integration interval
15 minutes.
.2.
satellite designated unhealthy in the GLONASS navigation
es
upon those measurements.
SS signal carrier phase and standard code measurements. The receiver shall compensate for the Doppler shift that is
niq
llite power at the surface of the earth provided that the satellites transmitting these
.3 that it is using the correct ephemeris and
loc at
e = major semi-axis (6 378 136 m);
J2
0 = second zonal harmonic of the geopotential (1 08 625.7 10–9 ; and
ω =
C n
lar perturbation xn (t
x , y n , zn
for the b), yn (tb), zn (t
±
3.2.3 AIRCRAFT ELEMENTS
3 3.1 GNSS (GLONASS) RECEIVER
3.2.3.1.1 Satellite exclusion. The receiver shall exclude any
m sage.
3.2.3.1.2 Satellite tracking. The receiver shall provide the capability to continuously track a minimum of four satellites
and generate a position solution based
3.2.3.1.3 Doppler shift. The receiver shall be able to compensate for dynamic Doppler shift effects on nominal
GLONA
u ue to the anticipated application.
3.2.3.1.4 Resistance to interference. The receiver shall meet the requirements for resistance to interference as specified
in 3.7.
3.2.3.1.4.1 Intrasystem interference. When receiving a navigation signal with frequency channel k = n, the interference
created by a navigation signal with frequency channel number k = n – 1 or k = n + 1 shall not be more than –48 dBc with
respect to the minimum specified sate
signals are simultaneously located in user’s visibility zone.
Note.— The intrasystem interference is the intercorrelation properties of the ranging pseudo-random signal with regard
to frequency division multiple access.
3.2 .1.5 Application of clock and ephemeris data. The receiver shall ensure
c k d a before providing any position solution.
APP B-31 23/11/06
Annex 10 — Aeronautical Communications Volume I
3.2 .3.1.6 Leap second correction. Upon GLONASS time leap second correction (see 3.2.1.3.1, tb) the GLONASS
ceiver shall be capable of:
a) generating a smooth and valid series of pseudo-range measurements; and
b) mark without loss of signal tracking.
a) utilize the old (prior to the correction) UTC time together with the old ephemeris (transmitted before 00 hours
00 minutes 00 seconds UTC); and
b) utilize the updated UTC time together with the new ephemeris (transmitted after 00 hours 00 minutes 00 seconds
3.2.4.1 For the GLONASS-M satellites, the navigation message shall contain the data necessary to relate UTC(SU)
features:
e to UTC time (as maintained by the National
ime Service of Russia, UTC (SU)) within 1 microsecond.
hours
m
a continuous timescale) to become synchronized with
-second epochs of corrected UTC timescale. GLONASS users are notified in advance on these planned corrections. For the
3.2.4.2 Accuracy of mutual satellite timescales synchronization shall be 20 nanoseconds (1 sigma) for GLONASS
3.2.4.3 The correction to GPS time relative to GLONASS time (or difference between these timescales) broadcast by
e GLONASS-M satellites, τGPS, shall not exceed 30 nanoseconds (1 sigma).
Note.— The accuracy of τGPS (30 ns) is det SPS coarse acquisition signal and may be
fined upon completion of trials of the GLONASS tellites.
soid and gravitational field of the earth 1990). The GLONASS
roadcast ephemeris shall describe a position of transmitting antenna phase centre of a given satellite in the PZ-90 earthcentred
earth-fixed reference frame.
re
resynchronizing the data string time
3.2.3.1.6.1 After GLONASS time leap second correction the GLONASS receiver shall utilize the UTC time as follows:
UTC).
3.2.4 TIME
time to UT1. GLONASS time shall be maintained to be within 1 millisecond of UTC(SU) time after correction for the integer
number of hours due to GLONASS control segment specific
| tGLONASS – (UTC + 03 hours 00 minutes) | < 1 ms
The navigation data shall contain the requisite data to relate GLONASS tim
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