Javad OMEGA, Руководство пользователя

Страница: 17 / 26

www.javad.com 17
tion:
• pd -carrier phase differential (RTK) with fixed
ambiguities
• pf - carrier phase differential (RTK) with float am-
biguities
• cd- code differential (DGPS) mode
• wd - wide area code differential mode (WDGPS)
• sp - single point positioning mode1
Open the Rover tab and set up the following pa-
rameters:
• RTK Position Computation Mode – se-
lect Extrapolation for RTK float (kine-
matic), or Delay for RTK fixed (static).
If Extrapolation is selected, the rover will extrapo-
late the base station’s carrier phase measurements
when computing the rover’s current RTK position.
If Delay is selected, the rover will not extrapolate
the base station’s carrier phase measurements to
compute the current rover position. Instead, the
RTK engine will compute either a delayed RTK po-
sition (for the epoch to which the newly received
RTCM/CMR message corresponds) or the current
stand-alone position (while waiting for new RTCM/
CMR messages coming from the base).
• Confidence Level for Ambiguity – list box governs
the process of the RTK engine fixing integer ambi-
guities. The RTK engine uses the ambiguity fix indi-
cator when making a decision whether to fix ambi-
guities or not. Low, Medium and High correspond
to the indicator’s 95%, 99.5% and 99.9% states,
respectively. The higher the specified confidence
level, the longer the integer ambiguity search time.
This is the price one pays for the higher reliability
of the ambiguity fixed solution.
Figure 9.
Rover tab
9. For RTK survey, open the
Ports
tab and set up the
parameters according Table 2, then click Apply .
Note:
For the survey with the post-processing keep default
parameters..
Figure 10.
Ports tab
Parameter Base Rover
Input - The same correction type as
Base has
Output Select the correction type. -
Period (sec) Set the period of
correction output
-
Baud rate Baud rate for the corresponding receiver port
RTS/CTS Enable
10. Open Advanced tab, and then Multipath