GPS and Mapping with "Fast on Trigger" data

I'm running a long term test on a moving vehicle in which the sample rate is 200kS/s for 1s either side of a trigger condition, but 1S/s otherwise (max, min and average recorded). Ie "fast on trigger, slow otherwise".

The recorded GPS data is showing on "recorder" traces and gives valid longitude and latitude numbers every 1s which show in a "digital meter" widget and which can be typed into Google Maps to get an exact location on a map. However:

a) The "slow rate" data will not display as a track in the dewesoft mapping widget .. the mapping widget shows straight lines connecting each trigger point.

b) The cursor on the mapping tool does not move as I move the cursor along the recorded data; it just stays at the location where the recording started, so it's impossible to correlate triggers with positions on the map. (see update .. I was wrong about this)

Exporting to *.kml or *.xls only exports the locations of triggers.

How can I get the mapping widget to show the location of each trigger - should I record at full rate for longer either side of each trigger? Better still get it to show the whole track including the low rate data.

Hi Nick

I think you would need to record as Always fast to get the GPS data in this way. please could you email [email protected] and send a data file and some screenshots?

Thanks

Andy Champion

I'd like to request a follow up on this as we use GPS quite a lot.

I'll send a file to you Andy.

In fact I was wrong about the map widget not showing position when there is high rate data. In new data I received today, if I put the data cursor on a section of "fast" data then the GPS location is shown on the map. For some reason, I couldn't make it work on a previous data file (will try again).

It's just the low rate data that won't move the cursor, despite valid GPS data being available. I checked the old mapping tool and found that has just the same functionality. So this is the intended functionality of the mapping widget.

I have railway trains out on test for days at a time, searching for specific events at high resolution, so it's not feasible to use continuous high sample rates or to use only a very low sample rate. The "fast on trigger, slow otherwise" function is perfect for this ... except for the discontinuous GPS track!

It would be really useful to me if the map widget could plot GPS data acquired during a "slow otherwise" part of the recording. Alternatively ... I guess it's beyond possibility allow continuousl GPS recording (it already has a low data rate) whilst recording data signals "fast on trigger slow otherwise" ??

Ive raised this with HQ, hopefully its something that can be done

I'll keep you updated.

Thanks

Andy Champion