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Note.— The time-out intervals are defined from the end of the reception of
APP B-71 23/11/06
Annex 10 — Aeronautical Communications Volume I
Table B-57. Fast correction time-out interval evaluation
Fast correction
degradation factor
indicator (aii)
NPA time-out
interval for fast
corrections (Ifc)
PA time-out
interval for fast
corrections (Ifc)
0 180 s 120 s
1 180 s 120 s
2 153 s 102 s
3 135 s 90 s
4 135 s 90 s
5 117 s 78 s
45 s 30 s
12 s
6 99 s 66 s
7 81 s 54 s
8 63 s 42 s
9 45 s 30 s
10
11 27 s 18 s
12 27 s 18 s
13 27 s 18 s
14 18 s 12 s
15 18 s
3.5.8.1.1.9 The receiver shall not use a fast correction if Δt for the associated RRC exceeds the time-out interval for
fast corrections, or if the age of the RRC exceeds 8Δt.
3.5.8.1.1.10 The calculation of the RRC shall be reinitialized if a “Do Not Use” or “Not Monitored” indication is
ANGING FUNCTION
ns. The root-mean-square (1 sigma) of the total airborne error
cont for an SBAS satellite at the minimum received signal power level
(Chapter 3, 3.7.3.4.4.3) under the worst interference environment as defined in 3.7 shall be less than or equal to 1.8 metres,
excluding multipath effects, tropospheric and ionospheric residual errors.
Note.— The aircraft element will bound the errors caused by multipath and troposphere (3.5.8.4.1). For the purpose of
ma).
vironment as defined in 3.7 shall be less than or equal to
metres, excluding multipath, tropospheric and ionospheric errors.
received for that satellite.
3.5.8.1.1.11 For SBAS-based precision approach or APV operations, the receiver shall only use satellites with
elevation angles at or above 5 degrees.
3.5.8.1.1.12 The receiver shall no longer support SBAS-based precision approach or APV operation using a particular
satellite if the UDREIi received is greater than or equal to 12.
3.5.8.2 R
3.5.8.2.1 Precision approach and APV operatio
ribution to the error in a corrected pseudo-range
predicting service, the multipath error is assumed to be less than 0.6 metres (1 sig
3.5.8.2.2 Departure, en-route, terminal, and non-precision approach operations. The root-mean-square (1 sigma) of
the total airborne contribution to the error in a corrected pseudo-range for an SBAS satellite at the minimum received signal
ower level (Chapter 3, 3.7.3.4.4.3) under the worst interference en p5 23/11/06 APP B-72
Appendix B Annex 10 — Aeronautical Communications
3.5.8.2.3 SBAS satellite position
3.5.8.2.3.1 Position computation. The receiver shall decode Type 9 message and determine the code phase offset and
position (XG, YG, ZG) of the SBAS satellite.
3.5.8.2.3.2 SBAS satellite identification. The receiver shall discriminate between SBAS satellites.
Note.— This requirement applies to false acquisition of a satellite due to cross-correlation.
3.5.8.2.4 Almanac data
3.5.8.2.4.1 Recommendation.— The almanac data provided by the SBAS should be used for acquisition.
Note.— Health and status information is provided in the GEO almanac data to support acquisition, but need not be used
as a condition for use of that satellite.
3.5.8.3 GNSS satellite status function. The receiver shall exclude satellites from the position solution if they are
entified as “Do Not Use” by SBAS. If SBAS-provided integrity is used, the receiver shall not be required to exclude GPS
satellites based on the GPS-provided ephemeris health flag as required in 3.1.3.1.1 or to exclude GLONASS satellites based
on GLONASS-provided ephemeris health flag as required in 3.2.3.1.1.
e
ble
grity is not provided
y SBAS. ABAS or GBAS may be used to provide integrity, if available.
erence environment as defined in 3.7 shall be less than or equal to 0.4 metres,
xcluding multipath effects, tropospheric and ionospheric residual errors. The RMS of the total airborne contribution to the
rror in a corrected pseudo-range for a GLONASS satellite at the minimum received signal power level (Chapter 3, 3.2.5.4)
equal to 0.8 metres, excluding multipath
effects, tropospheric and ionospheric residual errors.
ate corrections and the
broadcast ionospheric corrections. For GLONASS satellites, the ionospheric corrections received from the SBAS shall be
3.5.8.4.2.2 The receiver shall use a general-least-squares position solution.
3.5.8.4.2.3 The receiver shall apply a tropospheric model such that residual pseudo-range errors have a mean value (μ)
metres and a 1 sigma deviation less than 0.07 metres.
Note.— A model was developed that meets this requirement. Guidance is provided in Attachment D, 6.7.3.
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