Saw: Sbas Almanac - ashtech DG16 Reference Manual

Table 7.18. $PASHR,SAL Data String (Continued)
Field
checksum
Total Bytes: 70

SAW: SBAS Almanac

$PASHS,RAW,SAW,c1,s2
This command enables or disables the SBAS almanac data, where c1 is port A, B
or C (optional port), s2 is ON or OFF.
The DG16 outputs the SBAS almanac data each time the reference time changes
(at a maximum of 5 minutes) with data for one satellite at each recording interval.
$PASHQ,SAW,[c1]
This command queries for SBAS almanac data. c1 is the optional port designator
for the response. If a port is not specified, the receiver sends the response to the
current port.
$PASHR,SAW
The response is one binary message per satellite in the format:
$PASHR,SAW,(almanac data)
Table 7.19 outlines the data string format.
Field
char
char
long
float
216
Bytes
2 The checksum is computed by breaking the
structure into 34 unsigned shorts, adding them
together, and taking the least significant 16 bits of
the result
Table 7.19. $PASHR,SAW Data String
Bytes
1 Data ID—Two LSB of byte. In the current
specification, the format is 00.
1 Health—
• Bit0—Ranging On (0) or Off (1)
• Bit1—Corrections On (0) or Off (1)
• Bit2—Broadcast integrity On (0) or Off (1)
• Bit3—Reserved
• Bit4-7—Filled by zero
4 t0—Almanac data reference time within the day
expressed in the SBAS time scale (seconds).
3*4 Satellite ECEF X, Y, Z coordinates (meters).
DG14 and DG16 Board & Sensor Reference Manual
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