Quick Installation Guide

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WERA4-Quick-US-200918

Page 49 of 73

The beam-forming software assumes, that the receive antennas are numbered from 1 to

16 as displayed. So a person standing in front of the receive antenna array with the

seaside to the left, will be closest to receive antenna 1.

The angle of true north is the angle covered by rotating clockwise from geographical north

to the line of the receive antenna array. The angle must be measured up to the left hand

side of the antenna line when counting from the first to the last receive antenna, see

sketch above.

7.1.9 Latitude & Longitude

Please enter the Latitude in degrees [0...90°] and minutes into corresponding fields and

select “N” for the northern, or “S” for the southern hemisphere.

Please enter the Longitude in degrees [0...180°] and minutes into the corresponding fields

and select “E” for the eastern, or “W” for the western half of the earth, regarding

Greenwich in England.

These coordinates should reflect the position of receive antenna 1, as the software

normally uses this position as starting point for the beam-forming.

These coordinates will be saved in the header of all data files and will be used to identify

the station. So these coordinates need to match the settings in the configuration file

/home/wera/etc/params.cfg to enable post-processing.

7.1.10 Time code + Cont. Acq. Start Time

The Time Code field has got the following options:

- UTC Refer WERA cycles and data file names to UTC (strongly recommended)

- LOC Refer WERA cycles and data file names to Local Time

This information is stored in the header of all data files for evaluation.

If the wrong time code is stored, then all post-processing steps will assume a wrong

measurement time.

By default the operating system of the UPC is configured to use UTC. So this should be

selected here. If the system time of the UPC is changed to local time, then this WeraDesk

parameter should also be changed to local time (LOC).

The Cont. Acqu. Start Time field has got the following options:

- 00 Start continuous measurement cycles with an offset of 00 minutes to a full hour

- nn Start continuous measurement cycles with an offset of nn minutes to a full hour

- 59 Start continuous measurement cycles with an offset of 59 minutes to a full hour

Remarks

By setting multiple WERAs to a different Cont. Acqu. Start Time, they can be operate in

different time slots to avoid one WERA to interfere with another WERA. To set up a timing

scheme, also take a look at Cycle Repetition Time and Data Acquisition Time.

If the Cont. Acqu. Start Time is set to 59 and the cycle repetition time is set to 10 minutes,

then measurements are started at these minutes: 9, 19, 29, 39, 49, 59.