ashtech ZY-12 Information Supplement page 93

Table 4.6. Measurement Quality [Good/Bad Flag]
Value of d
0
22
23
24
Note: In the MBEN message, goodbad = 25 and warning = 35 implies Z-tracking
(non-keyed operation). If it is in Y-mode (keyed operation), gotmeas flag will be
24.
PBEN Message
PBEN messages contain position data, including velocity data, DOP values, and
time. PBEN can be output in ASCII or binary format. Table 4.7 and Table 4.8
below outline the contents of the PBEN message in binary and ASCII format.
The structure of the PBEN message in binary format is shown below:
Serial Port Output
Table 4.5. Warning Flag Settings
Description of parameter d
Bits Index
1 2 Combination of bit 1 and bit 2
0 0 same as 22 in good/bad flag
0 1 same as 24 in good/bad flag
1 0 same as 23 in good/bad flag
3 carrier phase questionable
4 code phase (range) questionable
5 range not precise (code phase
loop not settled)
6 Z tracking mode
7 possible cycle slip
8 loss of lock since last epoch
Description
8
Measurement not available and no additional data is sent
Code and/or carrier phase measured
Code and/or carrier phase measure, and navigation mes-
sage was obtained but measurement was not used to com-
pute position
Code and/or carrier phase measured, navigation message
was obtained, and measurement was used to compute
position
7
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