Are You Ready For The GPS Week Rollover?

Are You Ready For The GPS Week Rollover?

From the U. S. Department of Energy’s Office of Electricity:

On April 6, 2019, there will be an event affecting the electric transmission and distribution system that has industry concerned about the potential for a major disruption.  During the Week Number rollover of the Global Positioning System (GPS), the week number that uses the 10-bit binary system will reach its limit of 1,024 weeks and will be forced to roll over and be reset to week 0.

For more details, please read this excellent article by Gavin Schrock, PLS at xyHt Magazine.

Wendell

Wendell

Wendell was a Land Surveyor for 26 years, then moved on to building websites for his second career. But he never lost sight of the surveying community and the other disciplines related to surveying. He's purposely stayed involved in the surveying industry because he has always been — and will continue to be — a Land Surveyor at heart.

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spyropasDavid LivingstoneantcrookJames ViannaMark Silver Recent comment authors

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Shelby H. Griggs PLS
Member

I will let you know on April 7th!SHG

Eric Kara
Member

This is Leica’s response on there “Myworld” website. They have been affected by these rollovers in the past, so will be crossing my fingers at 12:01am.”GPS Week RolloverOccurring 6 April 2019, the transmitted GPS week number in the navigation message will rollover from 1023 to 0. All currently operational Leica Geosystems GNSS receivers will not be affected by this rollover.Nevertheless, to ensure the best possible performance, it is a good practise to use the latest firmware. Please refer to the myWorld portal or contact your local Leica Geosystems representative to obtain the latest firmware versions.”

gschrock
Member

Two more GPS Week related tech bulletins:   Spectra Trimble

antcrook
Member

Topcon also has a list of receivers that will get the firmware upgrade and which ones will not.

A Harris
Member

@ Mark SilverWill this affect Ashtech and ProMark series GPS units?

gschrock
Member

I have not been able to find anyone to comment on much of the legacy gear (of any type). And in most cases, when I get a hold of an engineer at (any of the) manufacturers, they were not working there when legacy models were more common. I’ll keep trying…

A Harris
Member

Hope my Promark 3s are not blow out of use by [email protected] Silver, any knowledge about their use after the rollover?

Mark Silver
Member

I honestly don’t know, however I suspect that the PM3’s will fail. I also doubt new firmware will be made available for them. I also suspect that it will be possible to fix the errant RINEX with a software shim.
My semi-official responce can be found here: http://ymlp.com/zDSqbb 

toivo1037
Member

I did not see an issue with my old receivers (using for static work) on the last rollover.  Hoping that is the case again. I will be testing the following week for sure.

True Corner
Member

For TBC users won’t “Fix-Week” fix this latest rollover?

Mark Silver
Member

This is an URGENT NOTICE for users of the following GNSS receivers:ProFlex 500, ProFlex 800MobileMapper 100, 120ProMark 100, 120, 200, 220, 700, 800SP 20, 60, 80, 90mContinue reading [ https://ymlp.com/zDSqbb ]. The official Spectra Geospatial note is here [ http://trl.trimble.com/docushare/dsweb/Get/Document-905123/Spectra_SupportNote_GPS_Week2048.pdf ]

Mark O
Member

Mark,
 
My PM 220’s are not up to date, do I just run the .cab file? I’m a bit reluctant as I just bricked one trying to reload software. 

James Vianna
Member

From Marks article:
“it is my guess that the PM2/PM3 receivers will fail on rollover. In addition, I believe that the desktop tool ‘GNSS Solutions’ will probably also fail.”
It will be a bad day for me should this occur. Both the PM3 and GNSS Solutions have served me well over the years and produced some excellent static work for a next to nothing cost. They were a good tool for me to cut my teeth into GPS.
Now I know just enough to be dangerous, 😋 
Jim

Mark Silver
Member

ProMark 100, 120, 200, 220 + MobileMapper 100, 120:Download the update file from the Trimble file source. Put it (as a .CAB file) on an SD card. The SD card should be 4GB or less so that the device can read it.                Link: http://trl.trimble.com/docushare/dsweb/Get/Document-907151/PM5_V2.5.aW215Hm27.CABMake sure device battery is fully (or very nearly fully) charged.Turn on the device. Wait for it to fully boot.From the ‘File Explorer’ on the mobile device (NOT ON YOUR PC!) navigate to the card and then click on the .CAB file. The installer will auto-run. (You can find the ‘File Explorer’ under Start(flag), Programs then drag up.)When/if… Read more »

David Livingstone
Member

I know one issue I have is upgrading the Firmware in my Hiper II’s.  I am running a couple of newer Rangers with my GPS and when I upgrade the firmware, they stop working.  It appears that after doing this in the past and having problems I would have to pay for an OAF file or Legacy file for the Hipers to make them work with the Rangers if I upgrade firmware.  I’m hoping to get by doing nothing.

spyropas
Member

I have PM500 with v4 firmware could i update to the v6.8 ? And what about the fast survey software of the MMCX controller in v2.3.5? Is there any chance of incompatibility  ?