OmniSTAR 5220HP, Руководство пользователя

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OmniSTAR 5220HP User Manual
Issue 1.32 12/2010
64
GSA – GPS DOP and Active Satellites
The GSA message indicates the GPS receivers operating mode and lists the
satellites used for navigation and the DOP values of the position solution.
$GPGSA,m,f,sv,sv,sv,sv,sv,sv,sv,sv,sv,sv,sv,sv,P.P,H.H,V.V*XX
Field Number Description
1 Mode: M = Manual, A = Automatic.
2 Current Mode 1 = Fix not available, 2 = 2D fix, 3 = 3D
fix.
3 to 14 PRN numbers of the satellites used in the position
solution.
*
15 Position Dilution of Precision (PDOP).
16 Horizontal Dilution of Precision (HDOP).
17 Vertical Dilution of Precision (VDOP)
Table 10: Description of the GSA message.
NOTE:
When less than 12 satellites are used, the unused fields are null.