ashtech DG14, Reference Manual

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118 DG14 and DG16 Board & Sensor Reference Manual
HDP: HDOP Mask Value
$PASHS,HDP,d1
This command sets the value of the HDOP mask, where d1 is a number between
0 and 99.9. If the HDOP value computed by the DG16 is higher than the HDOP
mask value, the receiver will automatically go into fixed altitude mode. You can view
the current HDOP mask value by entering the query command $PASHQ,PAR and
checking the HDP field.
Example
Enter the following command to set an HDOP mask value of 6:
$PASHS,HDP,6
HGT: Height Model Selection
$PASHS,HGT,s
This command sets the height model used in the position output, where is a 3
character string defined in Table 6.22:
• ELG: (default) ellipsoidal height output, with worldwide geoidal model used
for geoidal separation field. (mean-sea-level)
• GEO: geoidal orthometric height output using worldwide geoidal model,
also used for geoidal separation field.
This does not affect the position output in the B-file or in the PBN message which are ECEF and
always with respect to WGS-84.
DEFAULT SETTING
HDP—4
Table 6.22. $PASHS,HGT Parameter
Height
Selection (s)
Altitude Output in
GDC
Geoidal Separation in GDC GGA Altitude
ELG Ellipsoidal Geoidal table Geoidal
ELU Ellipsoidal User-defined local geoid Geoidal
GEO Geoidal Geoidal table Geoidal
UDH Geoidal User-defined local geoid Geoidal