There is an issue with PM3, PM3.RTK (and perhaps MMCX) dropping SV tracking at random times. I believe that this problem started a couple of weeks ago. Beginning last Friday (30 September 2011) reports of this problem have escalated.
The problem does not appear to be fully endemic. The rate of occurrence of this issue is still very low. Multiple receivers in the same location will not all fail. We (iGage) are unable to duplicate this issue at will.
Only the PM3, PM3.RTK and MMCX receivers appear to be affected. All other Ashtech receivers are OK.
The symptoms of this issue are:
o Receiver tracks SV's, then stops tracking, then starts tracking again
o When jobs are post-processed, single observations are broken into multiple occupations
o Post-processed jobs do not fix
o If you are viewing the screen the receiver will appear to be tracking SV’s, then will drop tracking for a moment and then begin tracking again.
Engineers at Ashtech are already aware of this issue and are working 24-7 to find a solution.
When additional information or updated firmware is available, I will immediately send out additional notifications. If you have any additional information, I will be happy to include it with future reports.
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