The dual output triggering device TRG-715 is a unique piece of equipment that we developed for railway surveys in Denmark. We needed a three channel radar in order to be able to scan the ballast on the sides and in the front, we decided to use two independent ground penetrating radars. The problem came when we needed to syncronize the data files from both units; that's how the dual output triggering device was born.

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Synchronization is the key

There are times when a double channel radar is not enough. There are available solutions with multiple channels radars from several manufacturers. GSSI offers a multiple antenna system with 14 antennas, the TerraVision. That sounds great, but what if you don't need fourteen antennas or don't want to invest in such a system? Then the possibility of using two independent gpr systems becomes more attractive.

Collect Asynchronously, Then Assemble Synchronously!

We decided that if we were able to put marks in the data files at the same time then it wouldn't matter if both radar systems started at the same time or even were running at the same speed. The only thing we had to do later on was to make sure that the markers from one data file and the markers from the other data files correspond to each other.

A simple arrangement with an ordinary push button would have worked just fine, except for the simple fact that we wouldn't have had any information about the distance! That's where our solution the TRG-715 excels, it puts the markers not only in two independently running ground penetrating radar systems, but also into a GPS correlated database.

What else do you need?

Besides the dual marker switch you will also need a copy of our software GeoPointer X©, and of course to install the drivers to run this unit. The unit comes with all the required cables and a CD containing the drivers and a small version of the software GeoPointer X©. It can be up and running in no time at all.