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SPAN-SE User Manual Rev 1
Appendix C
Data Logs
C.4.41 RANGE
Satellite Range Information
RANGE contains the channel measurements for the currently tracked satellites. When using this log,
please keep in mind the constraints noted along with the description.
It is important to ensure that the receiver clock has been set. This can be monitored by the bits in the
Receiver Status
field of the log header. Large jumps in pseudorange as well as accumulated Doppler
range (ADR) occur as the clock is being adjusted. If the ADR measurement is being used in precise
phase processing, it is important not to use the ADR if the "parity known" flag in the
ch-tr-status
field
is not set as there may exist a half (1/2) cycle ambiguity on the measurement. The tracking error
estimate of the pseudorange and carrier phase (ADR) is the thermal noise of the receiver tracking
loops only. It does not account for possible multipath errors or atmospheric delays.
If both the L1 and L2 signals are being tracked for a given PRN, two entries with the same PRN
appear in the range logs. As shown in
Table 58, Channel Tracking Status
can be differentiated by bit 20, which is set if there are multiple observables for a given PRN, and bits
21-22, which denotes whether the observation is for L1 or L2. This is to aid in parsing the data.
Message ID:
43
Log Type:
Synch
Recommended Input:
log rangea ontime 30
ASCII Example:
#RANGEA,COM1,0,63.5,FINESTEERING,1429,226979.000,00000000,5103,2748;
26,
6,0,23359924.081,0.078,-122757217.106875,0.015,-3538.602,43.3,19967.080,
08109c04,
6,0,23359926.375,0.167,-95654966.812027,0.019,-2757.355,36.7,19960.461,
01309c0b,
21,0,20200269.147,0.038,-106153137.954409,0.008,-86.289,49.5,13397.470,
08109c44,
21,0,20200268.815,0.056,-82716721.366921,0.008,-67.242,46.1,13391.980,
01309c4b,
16,0,23945650.428,0.091,-125835245.287192,0.024,-2385.422,41.9,10864.640,
08109c64,
16,0,23945651.399,0.148,-98053428.283142,0.028,-1858.773,37.7,10859.980,
01309c6b,
.
.
.
44,12,19388129.378,0.335,-103786179.553598,0.012,975.676,36.6,3726.656,
18119e24,
44,12,19388136.659,0.167,-80722615.862096,0.000,758.859,42.7,3714.860,
10b19e2b,
43,8,20375687.399,0.253,-108919708.904476,0.012,-2781.090,39.1,10629.934,
18119e84,
43,8,20375689.555,0.177,-84715349.232514,0.000,-2163.074,42.2,10619.916,
10b19e8b*fd2d3125
