SEPTENTRIO PolaRx5S, User Manual

Page: 56 / 107

5.3. SBF2 I SMR PROGRAM
should not be computed for SBAS satellites (calibration value set to ’NA’). For
all satellites not addressed in the calibration file, the TEC calibration value
is assumed to be zero.
Corrected TEC values are obtained by subtracting the TEC calibration value
from the raw TEC.
The ISMR file contains corrected values.
5.3.1 ISMR Record Details
Time Tag
The fi rst two columns contain the week number and time-of-week. The time scale is GPS
time, even for non-GPS satellite records.
Supported Satellites
I SMR records are generated every minute for all satellites tracked by the receiver.
The SV I D column identi fi es the satellite and the di ff erent constellations are assigned their
own range of values. For example, SV I D values in the range 1-37 refer to GPS satellites. You
can fi nd the full list of satellite constellation SV I D ranges in the ‘ SBF Outline ’ section of the
‘ PolaRx5S Reference Guide ’ .
Supported Signals
For each satellite, the I SMR fi le contains iono indices (S4, Phi
xx
, ...) for up to three signals, as
listed in the table below. The signals in italic can be selected with the
-s
option of
sfb2ismr
.
Satellite system Signal 1 Signal 2 Signal 3
GPS L1CA L2C L5
GLO L1CA L2CA
GAL E1 E5a E5b (E6, E5)
BDS B1 I B2 I (B2a) B3 I
QZSS L1CA L2C L5
SBAS L1CA L5
I RNSS L5
Number of Columns
By default, the I SMR fi le contains 62 columns, i.e. 62 values for each satellite every minute.
I t is possible to specify the number of columns to be included in the I SMR fi le by using the
-n
option of
sfb2ismr
. For example, a user only interested in the satellite azimuth and
elevation (columns 5 and 6) could use the option
-n6
to skip all columns after the 6th one.
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