12
English
4.
ProMark3 RTK Configurations
5.
Rover Initialization
. Before starting a survey, the rover
must be initialized. There are three possible methods:
“On The Fly”, “Known Point” and “Bar”. The “Bar”
method can only be used if you have your own base.
The initialization methods are introduced in the post-
processing chapter (see page 42). The description is
accurate for real-time processing too. Unlike post-pro-
cessing though, real-time processing tells you in real
time when initialization is complete.
Compared with post-processing surveying, RTK survey-
ing proposes
a fourth initialization method called “Stat-
ic”
. With this method, the antenna should stay still over
an unknown point until initialization is achieved. This
method gives faster initialization than “On-The-Fly”
initialization in the same operating conditions.
The time required for initializing the rover ranges from
a few seconds to a few minutes, depending on the base-
line length, the GPS constellation and the initialization
method used.
“Known Point” and “Bar” are the fastest initialization
methods.
6.
Baseline Length
. Whatever the base used, its distance
to the rover, called “baseline” (up to 1.6 km or 1.0 mile
with license-free radios, up to 10 km with a network
connection), must roughly be known to make sure RTK
positions will achieve the expected level of accuracy.
Base/Rover
(Base/rover System)
Rover-Only
(Network Connection)
Base
Rover
Radio Data Link
Rover
GPRS Data Link
Internet
+ Cell
Phone
