ADU2 datasheet(46/162 Pages) ETC

46 / 162 page

Page 34

ADU2 Operation and Reference Manual

Dynamic Calibration Procedure

The Dynamic Calibration procedure is used when the antenna array is mounted on a

vehicle that moves during calibration, such as a ship at sea. This program determines

relative antenna positions on moving vehicles using GPS carrier phase measurements.

You only need to calibrate the antennas once, however if the relative locations

between an antenna changes, you must recalibrate the antenna array.

The Dynamic Calibration procedure has the following steps:

Collect the data (ADULOG)

Determine the relative antenna positions (CALI3DF)

Enter offset vector information (REMOTE)

Collect the Data

After the antennas or antenna array has been tested, the sample data should be

collected. ADULOG is the application used to collect measurement data. For

Dynamic Calibrations, the software requires at least one half hour of continuous,

cycle-slip free measurement for five or more satellites with a PDOP less than six for

each antenna. Collect the data for at least one hour at a recording interval of once

second when the vehicle is under normal motion to ensure meeting the software data

requirements.

Start ADULOG by typing adulog <ENTER> at the DOS prompt. The

main screen opens.

Verify the PC Port listed at the bottom of the screen is correct. To change the

PC Port, press 1, 2, 3, or 4 corresponding to the PC Port.

Tab to the Baud field. If the baud rate is not set to 38400, then use Page Up

and Page Down to set the baud rate to 38400.

Tab to the Recording Interval field. Type 1 in the recording interval.

Tab to the Elevation Mask field. There is no need to change the elevation

mask from 10°.

Tab to the Target Disk Drive field. If you wish your collection data saved to

files located on a drive other than the C drive, enter the drive letter.

Tab to the Directory field. Type in the name of the directory where you want

your data files saved.

Tab to the Template field. Type cali and press <ENTER>. The cali template

creates the B and E-file names.

Press F10 to start collecting the data. A dialog box asks

Auto SV selection for best PDOP?

ADU2 Datasheet(PDF) 46 Page - List of Unclassifed Manufacturers