2 Operation Details
MDB
i
=
σ
y
i
λ
0
(1
−
σ
2
b
yi
σ
2
yi
)
1
/
2
where:
•
σ
y
i
is the standard deviation of the range measurement of the
i
th satellite;
•
σ
b
y
i
is the standard deviation of the estimator for the (measured) range of the
i
th satel-
lite;
•
λ
0
is the non-centrality parameter, which depends upon the probability of false alarm
of the
w
-test and the probability of missed detection.
The user can select the probability of missed detection acceptable for his/her application with
the
Pmd
argument of the
command.
The external reliability is defined as the influence of a model error of size MDB on the user
position. It is computed by propagating the MDB for each satellite to the position domain,
taking the satellite geometry into account. The receiver computes a distinct external relia-
bility level (XERL) for the horizontal and the vertical components (referred to as HERL and
VERL respectively). These values should be compared to the alarm threshold of your specific
application in order to verify if the position solution is adequate for that application.
Detailed results of the RAIM algorithm are available in the
and the
SBF blocks and in the
GBS
NMEA message.
72
Содержание PolaRx5TR
Страница 1: ...PolaRx5TR Reference Guide Applicable to version 5 5 0 of the Firmware ...
Страница 73: ...3 Command Line Reference Chapter 3 Command Line Reference 73 ...
Страница 108: ...3 Command Line Reference COM1 gca Ch05 CR R gca Ch05 ChannelAllocation Ch05 G01 auto 0 16000 COM1 108 ...
Страница 130: ...3 Command Line Reference COM1 gim CR R gim IonosphereModel off COM1 130 ...
Страница 147: ...3 Command Line Reference PVTMode Static StandAlone SBAS DGPS RTKFloat RTKFixed Cartesian1 COM1 147 ...
Страница 218: ...3 Command Line Reference COM1 esoc COM1 MeasEpoch CR R esoc COM1 MeasEpoch SBFOnce COM1 MeasEpoch COM1 218 ...
Страница 237: ...3 Command Line Reference COM1 237 ...
Страница 251: ...3 Command Line Reference Event type Command etime 1588343730 before 1440 after 1440 Planned Disk DiskEvent COM1 251 ...
Страница 279: ...3 Command Line Reference COM1 279 ...
Страница 294: ...4 SBF Reference Chapter 4 SBF Reference 294 ...