Testing Procedures for Legacy GPS Gear for Week Rollover on April 6-7
Since you are not doing a project on the afternoon of the 6, continuity is not important. Collect 4 hours before 0:00 UTC and 4 hours after, either it works or it doesn't work. Not much you can do about it until you know it does not work.
Paul in PA
Won't the almanac update during your long session without any other action? I thought receivers got an update multiple times per hour.
This thread reminds me of my test of running a session through a leap second. The receiver didn't figure it out. And I started it, left home for a party, and came back to find the battery run fully down and therefore frozen. Not good for SLA batteries, and it went downhill fast on subsequent uses.
I just might be able to figure out how to modify a RINEX file after April 7 to keep my Leica gear from being boat anchors.
I think you can do this with teqc by explicitly specifying the GPS week number.
From my understanding, the almanac isn't updated multiple times every hour. It takes a little over 12 minutes to download the almanac, but it can be used for a while. My dealer suggested reformatting the system after April 7 so that a new almanac will automatically be downloaded.
Hey Jim, weren't you involved with the "Fix Week" patch for Trimble receivers?
I wasn't involved in that effort, but I had a similar problem with some old Topcon receivers that used Trimble boards similar to the 4700. I wrote some custom software to deal with that. It does, indeed, sound like the same issue.