Completed the western most 20x100m portion of the mag survey area near SLT. I collected the data using a different display mode wondering if that might have a positive impact on the way the data was collected, but it didn't. After downloading it this evening, it turned out to be crap. Mike Wilson from GEM responded this morning saying he got the files I emailed and that it appears to be a software issue. He said he will work on it with another engineer and get me an update. In the meantime most of the survey area is complete except for two small blocks on the northern section of the grid that include the SLT operations. I'm going to avoid those and not collect any more data until we've cleared up the software issue.