Trimble GPS - Solutions for April 6, 2019 Rollover

 

On April 6, 2019 there will be a GPS rollover that could affect all GPS / Timing units in the world, regardless of manufacturer.  

For more information about your Trimble product specifically, please refer to the chart below

The Background

In addition to providing an accurate location information, the Global Positioning System provides accurate timing information to many critical systems – power grid, communications, financial markets, emergency services, and industrial control to name a few. It also includes the ability to transmit the proper date and time to a receiver by supplying the receiver with the current week and the current number of seconds into the week. This allows the receiver to translate the date and time into a more typical format – day, month, year, and time of day.

However, the field from the Satellite system that contains the week number is a 10-bit binary number. This limits the range of the week number to 0 – 1023, or 1024 total weeks.

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

April 6, 2019 is the 1024th week and unless a GPS module or application has already accounted for this, the date may not report accurately. If the application does not use the date or if there are other sources for the date outside of the GPS module, you may not be affected.  

 

Which GPS Units are affected?

Below is a partial list of Trimble GPS modules with part numbers and names.   The units that have the potential to be affected by the April 6 WNRO Event have a star (*) beside it.  Not all products will have the same WNRO date.  Even if your product is not affected by the imminent WNRO Event, all products have a WNRO date.  Please use the below links to review the bulletin of your particular product for full information.

 

Note:  Position data (lat, lon), velocity and PPS will continue as normal and will not be affected.  Only the week number will be affected.

On April 6, 2019 there will be a GPS rollover that could affect all GPS / Timing units in the world, regardless of manufacturer.  

The Background

In addition to providing an accurate location information, the Global Positioning System provides accurate timing information to many critical systems – power grid, communications, financial markets, emergency services, and industrial control to name a few. It also includes the ability to transmit the proper date and time to a receiver by supplying the receiver with the current week and the current number of seconds into the week. This allows the receiver to translate the date and time into a more typical format – day, month, year, and time of day.

However, the field from the Satellite system that contains the week number is a 10-bit binary number. This limits the range of the week number to 0 – 1023, or 1024 total weeks.

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

April 6, 2019 is the 1024th week and unless a GPS module or application has already accounted for this, the date may not report accurately. If the application does not use the date or if there are other sources for the date outside of the GPS module, you may not be affected.  

 

Which GPS Units are affected?

Below is a partial list of Trimble GPS modules with part numbers and names.   The units that have the potential to be affected by the April 6 WNRO Event have a star (*) beside it.  Not all products will have the same WNRO date.  Even if your product is not affected by the imminent WNRO Event, all products have a WNRO date.  Please use the below links to review the bulletin of your particular product for full information.

 

Note:  Position data (lat, lon), velocity and PPS will continue as normal and will not be affected.  Only the week number will be affected.

Product Number

Product Description

Bulletin Link
(If link doesn't work, please copy and paste the url)

Potentially Affected by April 6, 2019 WNRO

46240-00

Lassen SQ

https://trimble.box.com/s/kror0q05nxndf4zlm8zwdxsb3at6o5fn

Yes

46240-05

Lassen SQ

https://trimble.box.com/s/kror0q05nxndf4zlm8zwdxsb3at6o5fn

Yes

46240-20

Lassen iQ

https://trimble.box.com/s/kror0q05nxndf4zlm8zwdxsb3at6o5fn

 

46240-25

Lassen iQ

https://trimble.box.com/s/kror0q05nxndf4zlm8zwdxsb3at6o5fn

 

38116-20

Lassen SK8 II

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

Yes

38116-25

Lassen SK8 II

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

 

39263-00

Lassen LP

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

Yes

39263-10

Lassen LP

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

 

39263-15

Lassen LP

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

 

36916-00

Ace III

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

 

38223-61

Thunderbolt

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

Yes

39448-61

Thunderbolt

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

Yes

48050-61

Thunderbolt II

https://trimble.box.com/s/diqt04yjixvahemuphuarktnqjaf623h

Yes

58048-00

Copernicus

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

58048-10

Copernicus

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

58048-20

Copernicus

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

58048-30

Copernicus

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

63530-00

Copernicus II

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

63530-10

Copernicus II

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

63530-50

Copernicus II

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

67415-00

Copernicus IIA

https://trimble.box.com/s/a43qcip8rarhbfui89lfeq0g8g3sy8e6

Yes

68674-00

Condor C1011

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68674-05

Condor C1011

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68674-10

Condor C1011

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68676-10

Condor C1216

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68676-20

Condor C1216

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68675-00

Condor C1722

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

67650-10

Condor C1919A

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

67650-20

Condor C1919C

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

70896-00

Condor C2626

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68677-05

Silvana with C1919A

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

68677-55

Anapala with C1919A

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

80300-07

TM3000

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

80300-08

TM3000

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

80300-28

TM3000

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

80300-77

TM3000

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

80300-78

TM3000

https://trimble.box.com/s/xj0m2ad9sspgf2il6qs4wo60fo2241nl

Yes

52664-05

Resolution T

https://trimble.box.com/s/lp6267igvdu8xwv43p55irf74a70u608

 

52664-15

Resolution T

https://trimble.box.com/s/lp6267igvdu8xwv43p55irf74a70u608

 

66266-00

Res SMT

https://trimble.box.com/s/egu4o3iq9pfgzszwpz9mhcmn7xki59ur

 

66266-05

Res SMT

https://trimble.box.com/s/egu4o3iq9pfgzszwpz9mhcmn7xki59ur

 

99899-00

Res SMTx

https://trimble.box.com/s/egu4o3iq9pfgzszwpz9mhcmn7xki59ur

 

39091-00

Acutime 2000

https://trimble.box.com/s/klu9i67gusee9vatj3zqowsqukpstyqy

 

39091-20

Acutime 2000

https://trimble.box.com/s/klu9i67gusee9vatj3zqowsqukpstyqy

 

55238-00

Acutime Gold

https://trimble.box.com/s/27vmai76sgcx9b0nhfmmtjmuxbtdhhn5

 

97975-05

Res SMT 360

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

96975-00

ICM 360

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

106406-00/05

Acutime 360

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

89999-00

Res GG

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

92626-00/05

Acutime GG

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

95959-00

Mini T GG

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

60333-30

Thunderbolt E

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r

 

60333-50

Thunderbolt E

https://trimble.box.com/s/pvy8tgxx2dojk7cwnhwi3urwdoq0es8r