The company Trimble, with whom we work, warned us of an issue impacting all products developed in the geophysical branch.

Indeed, Trimble informs us of a rollover (overflow in calculating the number of weeks TU) problem regarding GPS cards in the Lassen family.

Hathor & Locsat products:
On February 14, 2016 at 00:00:00, the cards will no longer give the correct date but the date of June 30, 1996.
This change of date is associated with a period of 2 hours during which the receivers will no longer give position.
The obsolescence of these products does not allow us to offer alternatives unless we identify a large number of users wanting to upgrade their products.

CitySharkII products:
On February 14, 2016 at 00:00:00 starts a 2 hour period during which receivers will no longer give position.
On July 28, 2019 at 00:00:00, cards operating under the NMEA protocol will no longer work.
The stations delivered since July 1, 2015 are not impacted by this issue. A further notice will give the number of the stations impacted by the problem.
For these stations a replacement kit will be developed and proposed to users.
The pricing and timing are being analyzed.
The goal is that these changes can be installed directly by users via a simple card change.

Your questions and comments are to be addressed to Jacques Sarraut j.sarrault@keas-group.com or js@leas.fr With apologies for the inconvenience and the late information.