OmniSTAR 5220HP, User Manual

Page: 55 / 83

OmniSTAR 5220HP User Manual
Issue 1.32 12/2010
55
SEEDING
For the OmniStar 5220HP receiver, HP initialization time can be reduced by
supplying the known position. If the current position coordinates are known
very accurately, the OmniSTAR algorithm can be sent with the known
coordinates.
Warning: The coordinates accurately should be known to within
10 cm before attempting to seed the position. Any errors
entered here will affect the future accuracy of the position
solution.
$JHP,POS,PRESENT ( or $JHP,POS,P )
This will initialize the OmniSTAR HP algorithm with the receiver’s
present location by saving the current location into non volatile
memory.
If the current latitude, longitude and altitude standard deviations are
cumulatively greater than 0.6m, the current position is not stable and
the command is ignored. Under this condition, the system responds
with the message:
$>JHP,POS,Present Location Not Stable
EXAMPLE:
$JHP,POS,PRESENT
Reply:
$>
$JHP,POS
Displays the current saved position as :
$>JHP,POS,lat,lon,height:
Where “lat” and “lon” are the user’s latitude and longitude in degrees
(decimal notation);
“lon” being negative for west and “lat” being negative for south;
“height” is in meters.
EXAMPLE:
$JHP,POS
Reply:
$>JHP,POS,0.00000000,0.00000000,0.000
(no position saved yet)
or
$>JHP,POS,52.09641688,4.40618040,54.677
(displays saved position)