Specifications

Base/Rover Configuration

You are using your own ProMark3 RTK base to generate the

RTCM corrections needed by the rover. A pair of Magellan li-

cense-free, plug-and-play radios is used for the data link.

About the Base Position

In addition to the good reception conditions required at the

base (see page 37), you must also think about whether the

base position should accurately be known with great precision

or not. The explanations below will help you understand what

you need in terms of base position accuracy.

1. If you are only interested in performing relative measure-

ments (i.e. positions of points relatively to other points),

then the base can be installed on an unknown point meet-

ing the reception requirements (see page 37). In this

case, the position to be entered in the base can only have

meter accuracy.

Caution! Keep in mind you will not be able in this case to

attach your points to a known coordinate system unless

later you accurately determine one of these points in the

desired coordinate system. If you are using FAST Survey,

you can also use the Localization function to attach your

job to your local system.

2. If you want to obtain absolute, centimeter-accurate posi-

tions attached to a particular coordinate system for all

your surveyed points, then the base position must be

known with the same centimeter accuracy.

If this position is already defined in a GNSS Solutions

project, just upload this position as a control point from

the GNSS Solutions project to the ProMark3

RTK base.

You will then simply have to select this point in the base’s

Site ID field (see page 39).

If the chosen position for the base is unknown whereas

you need centimeter accuracy for this point in the coordi

nate system used, you can determine it through a static

post-processing survey. You will however need a reference

position to determine this point (see

page 84).