ashtech HDS800, Reference Manual

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Set Command Library
to “0”. The base position can then be read using the
$PASHQ,CPD,POS command.
• In “Hot Standby RTK” (s1=BKP), the receiver computes
two independent positions from the two independent
corrections streams entering the receiver. The input port
for the correction stream of the primary RTK is defined by
the $PASHS,CPD, REM command. The input port for the
correction stream of the backup RTK position is defined
by parameter c4 in $PASHS,CPD,MOD. The receiver
checks that the submitted value for c4 is compatible with
the settings last performed with $PASHS,CPD,REM.
In “Hot Standby RTK”, the position delivered by the
receiver through the chosen output messages (ATM, PVT,
GGA, etc.) is the best position between the primary RTK
and backup RTK. The receiver itself determines which is
the best position, based on all the available parameters
and indicators. At any time, users can find out which RTK
provides the best position by analyzing the Base Station
ID field in these messages.
• The backup position is computed only from reference data
received at integer seconds of time intervals.
• In “Hot Standby RTK”, the Fast CPD mode is always
active (ON) whatever the setting last performed with
$PASHS,CPD, FST. In addition, the base is assumed to be
static regardless of the current value assigned to
parameter d3 in $PASHS,CPD,MOD.
Relevant Query
Command
$PASHQ,CPD,MOD
See also
$PASHS,BAS
$PASHS,CPD,REM
$PASHS,CPD,FST