CSI Wireless Seres, Reference Manual

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Seres Reference Manual
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5.7.10 RD1 Data Message
The RD1 message contains diagnostic information for SBAS operation.
Table 5-16 breaks down the RD1 data message into its components. This
message has the following format:
$RD1,SecOfWeek,WeekNum,FreqMHz,DSPLocked,BER-
BER2,AGC,DDS,Doppler,DSPStat,ARMStat,DiffStatus,NavConditio
n *cc<CR><LF>
Table 5-16 RD1 Data Message Defined
Field Description
SecOfWeek The second of GPS week (may be a couple of seconds old)
WeekNum The GPS week number
FreqMHz The L-band frequency in MHz (1475.4200 is used for SBAS)
DSPLocked 1 if DSPStat = 1B or 1F
BER-BER2 Bit error rate – bit error rates are given for both SBAS satellites being tracked
AGC L-band Signal strength
DDS 0.0 for SBAS
Doppler 0 for SBAS
DSPStat A status bit mask for the DSP tracking of SBAS
ARMStat A status bit mask for the ARM GPS solution
DiffStatus The SBAS PRN of the satellite in use
NavCondition A series of hex character fields, which is read from right to left, with each field
representing the number of GPS satellites satisfying a certain condition, all of which
conditions are required if the satellite is to be used in the solution
*cc Checksum
<CR><LF> Carriage return and line feed
The following table describes the DSP status. The DSP status should be
17, 1B, or 1F when SBAS tracking has been achieved.