3rd November 2019 - GPS Week Number Rollover – Impact on Zebra EMC Products

Article ID:

Issue / Question

Certain Zebra mobile computing devices may be affected, by an industry-wide change in the GPS, starting at 12:00 GMT MIDNIGHT on November 3rd, 2019.

Applicable To

GPS-enabled Zebra Mobile Computing Devices (MC45, MC65, MC67NA, TC55, ET1N2, TC75, R12 & C5M/F5M) with older software Images.

Resolution / Answer

Affected GPS-enabled Zebra Mobile Computing Devices may require a BSP and/or a patch update. 

Please refer to the corresponding release notes below.

For the 6th April 2019 GPS week number rollover event, GPS Week Number Rollover – Impact on Zebra EMC Products

MC45
MC45 WM6.5 BSP v04.17.02 GPS Rollover Fix Release | Release Notes 

MC65
MC65 WM6.5 BSP v05.48.0002 GPS Rollover Fix Release | Release Notes

MC67NA
MC67 Android JB Patch for GPS Rollover Fix | Release Notes [ Compatible for BSP v06.01.16 & v03.05.15 ]
MC67 Android KK BSP v03.20.01 LifeGuard Update 06 Release | Release Notes
MC67 Android KK BSP v03.20.01 LifeGuard Update 06 Release for FIPS | Release Notes

TC55
TC55 Android KK BSP v2.68 LifeGuard Update 12 Release for GMS | Release Notes
TC55 Android KK BSP v2.68 LifeGuard Update 12 Release for Non-GMS | Release Notes
TC55 Android JB Patch - GPS Rollover Fix for GSM GMS | Release Notes [ Compatible for BSP v1.79G, v01.77G & v01.74G ]
TC55 Android JB Patch - GPS Rollover Fix for GSM Non-GMS | Release Notes  [ Compatible for BSP v1.79NG, v01.77NG & v01.74NG ]
TC55 Android JB Patch - GPS Rollover Fix for Verizon 3G GMS | Release Notes [ Compatible for BSP v01.10G & v01.08.01G.02 ]
TC55 Android JB Patch - GPS Rollover Fix for Verizon 3G Non-GMS | Release Notes [ Compatible for BSP v01.06.01, v01.08.01.02 & v01.10.0.0 ]
TC55 Android JB Patch - GPS Rollover Fix for Verizon 4G GMS | Release Notes [ Compatible for BSP v01.05.01, v01.07.01G & v01.09G ]
TC55 Android JB Patch - GPS Rollover Fix for Verizon 4G Non-GMS | Release Notes [ Compatible for BSP v01.03.02, v01.05.01, v01.07.01 & v01.09 ]

ET1N2
ET1N2 Android JB Patch for GPS Rollover Fix Release Notes [ Compatible for BSP v02.20.2529, v02.20.2478, v01.20.2345 & v01.20.1651 ]

TC75
TC75 Android L BSP v02.10.02 LifeGuard Update 12 Release for GMS | Release Notes
TC75 Android L BSP v02.10.02 LifeGuard Update 12 Release for Non-GMS |Release Notes
TC75 Android L BSP v02.10.02 LifeGuard Update 12 Release for Non-GMS FIPS | Release Notes
TC75 Android KK BSP v00.15.06 LifeGuard Update 05 Release GMS | Release Notes
TC75 Android KK BSP v00.15.06 LifeGuard Update 05 Release Non-GMS | Release Notes
 

R12
R12 Windows 7/8/10 with Sierra Wireless EM73xx - GPS Week Number Rollover Patch | Release Notes

C5M/F5M
C5M/F5M Windows 7/8/10 with Sierra Wireless EM73xx - GPS Week Number Rollover Patch | Release Notes

This is an Industry change and not a Zebra product issue.  Please see below link from the Department of Homeland Security.

FAQ:


What is GPS week number roll over?
The Global Positioning System (GPS) started its clock on 6th of January 1980 at 00:00:00.
GPS uses 10-bit (0-1023) week number to identify how many weeks have passed since that start date.

For example: 
 

  • 6th Jan 1980, the week number will be 0;

  • 13th Jan 1980, the week number will be 1; and so on.

The 10-bit week number will rollover every 1024 weeks or approximately 19.6 years called epoch.
To report the current time, GPS receivers normally compute extended GPS weeks or cumulative GPS weeks.
The first week number rollover (1023 to 0) occurred at on 22nd August 1999 at 00:00:00 GPS time.

The next GPS week rollover will occur on:

  • November 21, 2038 (Extended GPS week 3072, 10-bit week 0)

+ Applicable Products