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of the Russian Federation State
ΔUT1= B1 + B2 × (NT – NA),
23/11/06 APP B-24
Appendix B Annex 10 — Aeronautical Communications
KP UTC second correction data
00 No UTC correction at the end of the current quarter
01 UTC correction by plus 1 s at the end of the current quarter
11 UTC correction by minus 1 s at the end of the current quarter
Note.— GLONASS system timescale correction is usually performed once a year at midnight 00 hours 00 minutes
0 seco f the International Time Bureau (BIH/BIPM) at the end of a quarter:
er,
T r num
e of NT transformation into the common form of current data information (dd/mm/yy) is presented in
t
T — at provides the predicted satellite user range accuracy at time tb. Coding is as indicated in
— tellite transmitting the navigation signal. 00 refers to a GLONASS satellite; 01 refers to a GLONASS-M
— t an updated ephemeris or
Updated ephemeris or frequency/time information is transmitted in the next interval after the end of the current
e
th e parameters:
1 — on-board the GLONASS-M satellite; τGPS parameter calculated on-board the
GPS — correction to GPS time relative to GLONA S
TGPS – TGL = ΔT + τGPS,
h
Δ onds.
A
n atellite.
0 nds in accordance with the early notification o
from 31 December to 1 January — first quart
from 31 March to 1 April — second quarter,
from 30 June to 1 July — third quarter,
from 30 September to 1 October — fourth quarter.
N — current date, calenda ber of the day within the four-year interval starting from 1 January in a leap year;
Note.— An exampl
At achment D, 4.2.7.1.
N4 — four-year interval number starting from 1996;
F a parameter th
Table B-17-B;
M type of sa
satellite;
P4 flag to show that updated ephemeris parameters are present. “1” indicates tha
frequency/time parameters have been uploaded by the control segment;
Note.—
int rval tb.
P — technological parameter of control segment indicating e satellite operation mode in respect of tim
00 — τc parameter relayed from control segment, τGPS parameter relayed from control segment;
01 — τc parameter relayed from control segment, τGPS parameter calculated on-board the GLONASS-M satellite;
10 — τc parameter calculated on-board the GLONASS-M satellite; τGPS parameter relayed from control segment;
1 τc parameter calculated
GLONASS-M satellite;
τ S time:
w ere
T is the integer part, and τGPS is the fractional part of the difference between the system timescales expressed in sec
Note.— The integer part ΔT is determined from the GPS navigation message by the user receiver.
M — type of satellite nA: coding “00” indicates a GLONASS satellite, coding “01” indicates a GLONASS-M s
APP B-25 23/11/06
Annex 10 — Aeronautical Communications Volume I
3.2.1.4.2 Additional data parameters. Additional data parameters are defined in Tables B-17-A to B-18-A.
The required location of
dditional data words within the GLONASS-M navigation message is defined in Table B-18-A.
Table B-17-A. Additional data parameters
Para eter No. Scale factor (LSB) Effective range Units
3.2.1.4.3 Location of additional data words within GLONASS-M navigation message.
a
m of bits
n 5 1 0
Dim ss
2 (–4.5 t 10–3
Dim less
0
1 four-year interval
See t 17-B
Dim ss
2 ±1 –3
MA
n 2 1 0 to 3 Dimensionless
to 31 Dimensionless
ln 1 1 0; 1 ensionle
B1 11 2–10 ±0.9 seconds
B2 10 –16 o 3.5) × s/mean sun day
KP 2 1 0 to 3 ension
NT 11 1 to 1 461 days
N4 5 1 to 31
FT 4 able BM
2 1 0 to 3 Dimensionless
P4 1 1 0; 1 Dimensionless
P 2 1 00,01,10,11 ensionle
τGPS 22 –30 .9 × 10 seconds
Table B-17-B. T word coding
FT value Pseudorange accuracy, 1 sigma (m)
F
0 1
1 2
2 2
15 Not used
.5
3 4
4 5
5 7
6 10
7 12
8 14
9 16
10 32
11 64
12 128
13 256
14 512
23/11/06 APP B-26
Appendix B Annex 10 — Aeronautical Communications
Table B-18-A. Location of additional data words within the GLONASS-M navigation message
W d Numbe
String in the
superframe Bit number within the string
number with
or r of bits
n 5 4, 19, 34, 49, 64 11
ln 1
3 ,
65 5
74 (w me)
9 – 10
　
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