Javad DELTAGNSS Receiver, Руководство оператора

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Chapter 4
49
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S
ETUP AND
M
EASURING
After configuring the receivers for measuring, each receiver needs to be setup up and the
receiver’s height measured and the measuring can begin. The TriPad provides quick access for
logging data, changing receiver modes, and viewing general data logging and satellite information
during a measuring.
4.1. Receiver Setup
A typical GPS measuring system consists of a Base station set up over a known point and a Rover
receiver set up to be a mobile data collector. After setting up the Base and Rover receivers, the
antenna height must be measured.
Before collecting data, make sure the Base and Rover receivers contain a current almanac and
current ephemeris data (see “Collecting Almanacs and Ephemerides” on page 28).
4.1.1. External Antenna Setup
The DELTA receiver can be used with an external antenna. Follow the steps below to connect an
external antenna to DELTA and measure its offset.
1. Attach the antenna to a tripod or bipod and center it over the point at which data will be
collected.
2. Measure the antenna height, as described in “Measure Antenna Height” on page 50.
3. Record the antenna height, point name, and start time in the field notes.
4. Attach the flexible RF cable from the external antenna to the antenna connector on the
bottom panel of the receiver.