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ansmitted power increases by more than 3 dB from the nominal power for more than 1 second shall be less than 2.0 × 10–7
any 30-second period.
Note.— The vertical co onitored for GBAS/E equipment.
3.6.7.3.2 Data monitoring
b) to broadcast Type 1 or Type 101 messages with the σpr_gnd,i field set to indicate the ranging source is invalid for
every ranging source included in the previously transmitted frame; or
c) to terminate the data broadcast.
Note.— Monitoring actions a) and b) are preferred to c) if the particular failure mode permits such a response, because
ctions a) and b) typically have a reduced signal-in-space time-to-alert.
Note.— Ground-based ranging systems are expected to use a portion of the 1 559 – 1 610 MHz band, which will be
lassified by the ITU as providing RNSS-ARNS service, and are expected to require up to ±10 MHz around their centre
S and/or GLONASS, they will constitute components of GNSS and will have associated
vionics receivers. Their interference protection level must be consistent with the interference environment of GNSS
e.— A GBAS-capable GNSS receiver may be implemented without the capability to process the Type 101 message,
e Type 2 message additional data block 2, or data specific to an approach performance designator value of 0.
.6.
AS aircraft receiver accuracy
8
hall be le
he g
nds
tr
in
mponent is only m
3.6.7.3.2.1 Broadcast quality monitor. The ground subsystem monitoring shall comply with the time-to-alert
requirements given in 3.6.7.1.2.1. The monitoring action shall be one of the following:
a) to broadcast Type 1 or Type 101 messages with no measurement blocks; or
a
3.6.7.4 GROUND-BASED RANGING SOURCES
c
frequency. As augmentations to GP
a
receivers.
3.6.8 AIRCRAFT ELEMENTS
3.6.8.1 GNSS receiver. The GBAS-capable GNSS receiver shall process signals of GBAS in accordance with the
requirements specified in this section as well as with requirements in 3.1.3.1 and/or 3.2.3.1 and/or 3.5.8.1.
Not
th
3 8.2 PERFORMANCE REQUIREMENTS
3.6.8.2.1 GB
3.6. .2.1.1 The RMS of the total aircraft receiver contribution to the error for GPS and GLONASS shall be:
APP B-113 23/11/06
Annex 10 — Aeronautical Communications Volume I
RMSpr_air (θn) ≤ a0 + a1 × e–(θn/θ0)
he
n Table B-77 for GPS and Table B-78 for GLONASS.
3.6. total aircraft receiver contribution to the error for SBAS satellites shall be as defined in
.5.8.2.1 for each of the defined aircraft accuracy designators.
3.6.8 cast tuning range. The VHF data broadcast receiver shall be capable of tuning frequencies
th
m, and the worst-case doppler shift due to the motion of the
ircraft, are reflected in the above requirement. The dynamic range of the automatic frequency control should also consider
the frequency-stability error budget of the aircraft VHF data broadcast receiver.
3.6.8.2.2.3 VHF data broadcast sensitivity, range and message failure rate. The VHF data broadcast receiver shall
achieve a message failure rate less than or equal to one failed message per 1 000 full-length (222 bytes) application data
messages, while operating over a range from –87 dBm to –1 dBm, provided that the variation in the average received signal
ower between successive bursts in a given time slot does not exceed 40 dB. Failed messages include those lost by the VHF
Aircraft accuracy
designator
θ n
(degrees)
a0
(metres)
a1
(metres)
θ0
(degrees)
w re
n = the nth
ranging source;
θ n = the elevation angle for the nth
ranging source; and
a0
, a1, and θ0 = as defined i
8.2.1.2 The RMS of the
3
Note.— The aircraft receiver contribution does not include the measurement error induced by airframe multipath.
3.6.8.2.2 VHF data broadcast receiver performance
.2.2.1 VHF data broad
in e range of 108.000 – 117.975 MHz in increments of 25 kHz.
3.6.8.2.2.2 VHF data broadcast capture range. The VHF data broadcast receiver shall be capable of acquiring and
maintaining lock on signals within ±418 Hz of the nominal assigned frequency.
Note.— The frequency stability of the GBAS ground subsyste
a
p
data broadcast receiver system or which do not pass the CRC after application of the FEC.
Table B-77. Aircraft GPS receiver accuracy requirement
A ≥5 0.15 0.43 6.9
B ≥5 0.11 0.13 4
Table B-78. Aircraft GLONASS receiver accuracy requirement
Aircraft accuracy
designator
θ n
(degrees)
a0
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