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arameters shall be as follows:
odified Z-count: indicates the time of applicability of the parameters in this message.
um pacted sources: the number of sources for which duration information applicable to all approaches is provided.
have limitations.
pacted.
an
the ranging source will become available or cease to be available.
oding: 0 = Differential corrections will soon cease to be provided for the associated ranging source.
e provided for the associated ranging source.
anging source availability duration relative to the modified Z-count.
Coding: 111 1111 = The duration is greater than or equal to 1 270 seconds.
number of approaches for which the corrections will be reduced due to approach
unique constellation masking.
Reference path data selector: an ata applies (3.6.4.5.1).
3.6.4.7 TYPE 6 MESSAGE
Note.— Type 6 message is reserved for future use to provide the information required for Category II/III precision
pproaches.
3.6.4.8 TYPE 7 MESSAGE
Note.— Type 7 message is reserved for national applications.
3.6.4.9 TYPE 8 MESSAGE
Note.— Type 8 message is reserved for local and regional test applications.
272
i=1
transmitted, such that m1 corresponds to the LSB o
o
and setting information for the currently visible or soon to be v
p
M
Coding: Same as modified Z-count field in Type 1 message (3.6.4.2).
N ber of im
Coding: 0 = Only specified obstructed approaches
1 to 31 = The number of ranging sources im
R ging source ID: as for Type 1 message (3.6.4.2).
Source availability sense: indicates whether
C
1 = Differential corrections will soon start to b
Source availability duration: the predicted minimum r
Number of obstructed approaches: the
indication of the FAS data block to which the source availability d
Number of impacted sources for this approach: the number of sources for which duration information applicable only to this
approach is provided.
a
APP B-93 23/11/06
Annex 10 — Aeronautical Communications Volume I
3.6.4.10 TYPE 101 MESSAGE — GRAS PSEUDO-RANGE CORRECTIONS
4.10 urces
able B-70A). The message shall contain three sections:
a) message information (time of validity, additional message flag, number of measurements and the measurement
type);
low-frequency information (ephemeris decorrelation parameter, satellite ephemeris CRC and satellite availability
information); and
c) satellite data measurement blocks.
6.4.10.2 essage shall include ephemeris decorrelation parameter, ephemeris CRC and source
vai eter, ephemeris CRC and
source availability duration shall apply to the first ranging source in the message.
3.6.4.10.3 Pseudo-range correction parameters shall be as follows:
Type 101 messages.
Number of measurements: as defined in 3.6.4.2.3.
Measurement type: as defined in 3.6.4.2.3.
ris decorrelation parameter (P): as defined in 3.6.4.2.3.
Ephemeris CRC: as defined in 3.6.4.2.3.
Source availability duration: as defined in 3.6.4.2.3.
Number of B parameters: an indication of whether the B parameters are included in the measurement block for each ranging
Coding: 0 = B parameters are not included
1 = 4 B parameters per measurement block
3.6.4.10.4 The measurement block parameters shall be as follows:
Rangi
sue of data (IOD): as defined in 3.6.4.2.4.
-range correction (PRC): as defined in 3.6.4.2.4.
Range rate correction (RRC): as defined in 3.6.4.2.4.
σpr_gnd: as defined in 3.6.4.2.4, with the exception of the range of values and resolution.
B1 through B4: as defined in 3.6.4.2.4.
Note.— Inclusion of the B parameters in the measurement block is optional for Type 101 messages.
3.6. .1 The Type 101 message shall provide the differential correction data for individual GNSS ranging so
(T
b)
3. Each Type 101 m
a lability duration parameters for one satellite ranging source. The ephemeris decorrelation param
Modified Z-count: as defined in 3.6.4.2.3.
Additional message flag: as defined in 3.6.4.2.3 except applicable to
Epheme
source.
ng source ID: as defined in 3.6.4.2.4.
Is
Pseudo
23/11/06 APP B-94
Appendix B Annex 10 — Aeronautical Communications
3.6.5 DEFINITIONS OF PROTOCOLS FOR DATA APPLICATION
Note.— This section defines the inter-relationships of the data broadcast message parameters. It provides definitions of
parameters that are not transmitted, but are used by either or both non-aircraft and aircraft elements, and that define terms
applied to determine the navigation solution and its integrity.
3.6.5.1 Measured and carrier smoothed pseudo-range. The broadcast correction is applicable to carrier smoothed code
　
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