Instruction manual

Command Response Formats Page 67
Command
Set Position Mode
$PASHS,PMD
This command sets the position mode for minimum number of SVs required to
compute a position in RTCM or autonomous operating mode. The command
structure is $PASHS,PMD,x where x = 0, 1, 2, or 3 as detailed below.
x = 0 minimum of 4 SVs needed (e.g., for 3-D)
x = 1 default, minimum of 3 SVs needed; with 3 SVs, altitude is held (2-
D); with 4 or more, altitude is not held (3-D)
x = 2 minimum of 3 SVs needed; altitude always held (always 2-D) x = 3
minimum of 3 SVs needed; with 3 SVs, altitude is always held;
with 4 SV s, altitude is held only if HDOP is greater than HDOP
mask (2-D), otherwise 3-D
x = 3 for 3 SVs locked, altitude is held fixed;
for SVs >3 and HDOP < HDOP mask, altitude is computed;
for SVs > 3 and HDOP equal to or greater than HDOP mask,
altitude is held fixed
Example: Set minimum SVs for 3-D computation
$PASHS,PMD,3
Set Position of the Antenna
$PASHS,POS
This command sets the position of the antenna used in differential base mode. The
structure is
$PASHS,POS,ddmm.mmmmmmm,x,dddmm.mmmmmmm,y,sxxxxx.xx
where the fields are as defined in Table 4.16.
aa Antenna number 0 through 99
mmdd Month and day
ii Operator ID 2 characters
<text> Comment, up to 13 characters
Table 4.16: POS Command Structure
Field Description
ddmm.mmmmmmm Latitude in degrees (dd) and decimal minutes
Table 4.15: PJT Structure (continued)
Field Description