GPS Week Rollover 2019

GPS Week Rollover 2019

What is the GPS Week Rollover?

The calculation of the date within the Global Positioning System is based on a week count. The signal which is send out by the GPS satellites includes a 10 bit variable week number. This limits the total number of presentable weeks to 1024.

GPS week Zero started January 6, 1980. The 1024 weeks counter ran out and rolled over on August 21, 1999. The week counter then reset to zero, and it has been recounting ever since.

When will it happen?

The next time the counter will reach week 1023 and rollover to zero is on April 6, 2019.

Supplier Status:

In the following you can check if your used product is affected.

Telit / General Statements:

• Latest update from 29.04.2019 – Customer Letter Rollover Issue
• Telit Cellular-GPS Combo Solutions
• SiRFstar4 based products
• SiRFstar5 based products
• TESEO 2 based products
• TESEO 3 based products
• MT3333 based products
• MT3337 based products

Telit / Detail View:

• SL869L-V2 is not affected.
• SL869L-V2S is not affected.
• SL869-V3 is not affected.
• SL869-ADR is not affected.
• SL869 is not affected.
• SL869-V2S is not affected.
• SL869-T is not affected.
• SL869-V2 is not affected.
• SE868 V3 is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• SE868K3-A/-AL is not affected.
• SE868K7-A/-AL is not affected.
• SE868-A/-AS is not affected.
• SL871 is not affected.
• SL871-S is not affected.
• SL871L is not affected.
• SL871L-S is not affected.
• SE873Q5 is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• SE873 is not affected.
• SE878K3-A is not affected.
• SE878K7-A is not affected.
• SL876Q5-A is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• JF2-Flash is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• JF2-EEPROM is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• JF2-ROM is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• JN3-Flash is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• JN3-EEPROM is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• JN3-ROM is partially affected.
  • Affected parts are listed in the Customer Letter Rollover Issue.
  • For Workaround instructions please contact your local Rutronik sales contact or send your inquiry directly to wireless@rutronik.com.
• LE910-EUG is affected. –> Please use Telit_Cellular_WeekRollover_Application_Note_r0 instructions.
• GE910-GNSS is not affected.
• HE910-DG is affected. –> Please use Telit_Cellular_WeekRollover_Application_Note_r0 instructions.
• HE910-EUG is affected. –> Please use Telit_Cellular_WeekRollover_Application_Note_r0 instructions.
• HE910-G is affected. –> Please use Telit_Cellular_WeekRollover_Application_Note_r0 instructions.
• LE910Cx is not affected.
• ME910C1 is not affected.
• ML865C1 is not affected.
• GE310-GNSS is not affected.
• LM940 is not affected.
• LN940 is not affected.
• LN941 is not affected.
• LM960 is not affected.
• GE864-GPS is not affected.
• H24 is affected – possible Workaround under clarification.
• GM862-GPS is not affected.

Nordic Semiconductor:

Nordic nRF9160 is not affected – it will pass the event without any interference.

GNS:

None of the GPS modules from supplier GNS is affected by the GPS Week Rollover 2019 – all will pass the event without any interference.

ST Microelectronics:

All ST Microelectronics GPS products are not affected.

Still ST recommends to work on the following steps for on the field products:

• move the min/max week number ahead periodically (e.g. every year) and prior production on the field.xmove
• If you want to update such CDB, you can do either by NEMA commands (SETPAR, SAVEPAR) or directly on the binary to be flashed in production.

For the Teseo III Family (Chips and modules), Default value is set to 1513 means Sept. 2009, and considering 1024 weeks users are covered until June 2029.

Advantech:

under clarification

If you have any further questions or concerns, please contact wireless@rutronik.com.