4 SBF Reference
Meas3Ranges
Number:
4109
"OnChange"
interval: internal measurement rate (receiver-type de-
pendent)
This block contains all the code, carrier phase and C/N0 observables at a given measurement
epoch. The resolution is 0.001m, 0.001cycles and 1dB-Hz for the code, carrier and C/N0
measurements respectively.
Applications requiring Doppler measurements can log the
Meas3Doppler
SBF block
in addition to the
Meas3Ranges
block. Applications requiring extended C/N0 resolution
(1/16dB-Hz) can log the
Meas3CN0HiRes
SBF block in addition to the
Meas3Ranges
block.
The advantage of this block compared to the
MeasEpoch
SBF block is its reduced size
while offering the full resolution for the code and carrier measurements. One of the
techniques used to reduce the size is to only encode full measurements (reference epochs)
every N epochs. Between these reference epochs,
Meas3Ranges
contains delta epochs
where the difference between the current measurements and the ones at the applicable
reference epoch is encoded. The decoder must have received and stored the applicable
reference epoch to be able to decode delta epochs. When streaming SBF over an unreliable
communication link, if the reference epoch is lost, subsequent
Meas3Ranges
blocks cannot
be decoded until the next reference epoch is received. The interval at which reference
epochs are encoded can be controlled with the
command. A
longer interval generally reduces the average block size, at the expense of a longer data gap
in case a reference epoch is lost.
See also page 301 for additional information.
The format of this block and of the other Meas3 blocks is complex and is not pro-
vided here.
Details can be obtained from Septentrio Support.
The RxTools instal-
lation contains the complete source code of a decoder in C language, together with
sbf2asc
, a small application showing how to use it. All C files can be found under the
sbf2asc
folder in the RxTools installation. The main measurement decoding function is
sbfread_MeasCollectAndDecode()
in the
sbfread_meas.c
file. Users interested in
decoding the Meas3 blocks are strongly advised to use the provided source code instead of
writing their own decoder.
The detailed definition of this block is not available in this document.
309
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 ...