Gnss surveying, Starting an rtk base – Spectra Precision Survey Pro v5.4 User Manual

Page 58

6. GNSS Surveying

Starting an RTK Base

NOTE: You don’t need to set up a base if you are working in a network. Just make sure
your rover is configured to receive network corrections, and actually receives them
before you start taking measurements in your job. See Starting an RTK Rover on
page 50.

What you have done already:

• You have set up the base GNSS receiver on a tripod over a point of your

choice and measured the antenna height.

• You have selected

GNSS from the instrument icon located on the Home

screen or Main Menu.

• You have created a receiver profile that matches the use of your receiver as

a base (or network base) and the receiver has been reported as being
“base” capable. See GNSS Mode - Connecting Survey Pro to a GNSS
Receiver on page 26.

• You have made sure the GNSS status is correct at the location where the

base is to be operated. See Checking the GNSS Status on page 32.

What you should do now:

• Go to the

Survey menu and tap Start Survey. You may also find the Start

Survey function on your Home screen.

• Unless already done, highlight the name of the receiver profile you intend

to use for operating your base.

For a “network base”, select the network to which the base will deliver its
corrections by selecting the relevant network profile name. For a “base”,
there may be additional settings required using the

Configure Modem button

(the radio settings provided by the selected receiver profile may not match
your case of use).

• Tap

Connect.

When creating a job, if you decided not to choose a coordinate system, you
will be asked to reconsider this choice when starting the base. The

Start

Survey Prompt Projection screen will appear at this time with two possible
options:

Ground Calibration: Choose this option if there is no known projection or
datum to relate your local grid coordinates to geodetic coordinates
(through this choice, you confirm your decision to use local control to
set up a coordinate system). The selection of a geoid is possible after
making that choice.