Chapter 6-12 CP44/54 Miscellaneous menu
Uses corrections from - indicates which differential corrections
(DGPS or SDGPS) are currently used for position determination.
CHANNEL 1: sat.no. - indicates which satellite number and name
is currently tracked/searched by channel 1, and what is the tracking
state.
Corrections - indicates if corrections are being received on this
channel. If YES: is the quality of the reception sufficiently high for
the corrections to be usable.
NONE: no corrections are received.
RECEIVED: corrections are received, but of insufficient quality.
USABLE: corrections are received and of sufficient quality.
USED: corrections received on this channel are used in the position
determination.
Integrity messages ok - the SDGPS system will transmit messages
concerning the integrity of the GPS satellites. This line will indicate
whether such messages are received and reliable.
Range used for position fix - if the receiver is tracking a particular
SDGPS satellite, it “knows” the distance to that satellite. This line
will indicate whether the distance is used in the position determina-
tion.
Type 0 warning received - if an SDGPS satellite is not operat-
ing according to specifications it will transmit a so-called “Type 0
warning”. In this situation, the receiver will not use any information
that it might receive from that satellite. Until the SDGPS system is
declared operational, the SDGPS satellites will always transmit Type
0 warnings.
It is possible (but not recommendable) to override the Type 0 warn-
ings - refer to last line in SDGPS setup: “Ignore type 0 warnings:
NO” should be changed to “YES”.
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