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large Trimble dat files filled with blank records


John Hamilton
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I may have posted this before, but I can't find it if I did. 

I have an assortment of old and new Trimble receivers. three 5700, one R7, two R8 model 2, two R10, two R10-2, one Alloy. The older receivers are used when we are doing static nets. 

We occasionally use the R8's when running static on lock walls where we have to walk far from the vehicle, less stuff to carry. I don't like using R10's out there because we had an R8 get blown into the river in a sudden storm (never recovered)

One of the R8's and the R7 always creates very large dat files. What it is actually doing is putting record type 16 subtype 199 in at 5 hz rate (collecting data at 15s epochs). Each of these records is only 40 bytes, but at 5 hz it adds up. Here is what the records look like...

AGC:227318200 3 5 0 0 505021 5525950
AGC:227318400 1 5 0 0 500559 5646260
AGC:227318600 0 5 0 0 498809 5619010
AGC:227318800 2 5 0 0 499877 5748900
AGC:227318800 4 5 0 0 499262 5678830
AGC:227319000 3 5 0 0 499180 5534150
AGC:227319200 1 5 0 0 500626 5640000

the time tag is the first number, in milliseconds of the week (i.e. 227318200=Tuesday 1538.2 GPS time). Not sure what the rest of it means 

Has anyone else seen this? It will fill up more than 50% of memory (10 MB) in the R8 if running all day. Less of an issue in the R7 as it uses a CF card for storage. More importantly, is there a fix? Resetting the receiver does not resolve this.   

 

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Jitterboogie
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Have you perused the UNAVCO web site?

They may actually have a process or script that could assist.

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John Hamilton
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@jitterboogie 

I am able to strip out the record 16 subtype 199 records, so it really doesn't affect the office processing (just slows it down a bit, and takes forever to download). And if I convert to rinex it doesn't show up at all.

 

The issue is in the field, we lost two days of data this week because the memory filled up, and the field guy didn't realize it. He had it out all day for three days, but only the third day was present when I went to download it today, and it was occupying 60% of the space. At this point I have taken that receiver out of the pool, but I would like to be able to fix it. 

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Jitterboogie
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Yeah John, not sure. The older R8s storage was their biggest down fall.

Maybe you could rig up a box to keep a TSC2 with a thumb drive and a Y cable and just store to the controller when using that old bird. 

That's about all I can figure unless they released software updates(checked UNAVCO they don't support) and you could flash with the GPS configuration tool.

Sorry I can't help more on this one.

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