Leica GR/GM Series with RefWorx firmware

Preparing for Leap Second 2016

Leap Second GRGM Series
Leica GR/GM Series with RefWorx firmware

It is highly recommended to update your GR/GM Series receivers to RefWorx firmware v4.02. This version contains some important optimisations that improve the system behaviour at times of leap second change. For details, refer to the RefWorx v4.02 release notes myWorld.

With the recommended firmware version, the tracking behaviour for GPS and Galileo of all Leica Geosystems GR/GM Series receivers will not be affected over the leap second change. GLONASS tracking may lose lock briefly and recover a few seconds later.

 

Leica GRX1200 Series (System 1200)


With the recommended firmware version, the tracking behavior for GPS and Galileo of all Leica GRX1200 Series receivers will not be affected over the leap second change. GLONASS tracking will lose lock briefly and recover a few seconds later.

If a Leica GRX1200 Series was turned off during the leap second change and is used after the leap second switch, the receiver will have trouble tracking GLONASS signals until a new almanac is downloaded, which can take up to a few minutes. A measurement engine reset (initialisation) will resolve the problem faster and enable you to track GLONASS satellites again.

 

Leica GMX900 monitoring receivers

The behavior of the overall monitoring setup of the Leica GMX900 monitoring receiver is depending on the Leica GNSS Spider version used and is described in the section previously. For the devices having the required minimum firmware (6.404 for GMX901 plus; 3.823/6.421 for GMX902 GG; 6.421 for GMX902 GNSS; 7.001 for GMS910), data outage have to be expected only for the seconds during the leap second change.

If the device is not used during the leap second change and is turned on at later point,  it will have trouble tracking GLONASS signals until a new almanac is downloaded. This can take up to a few minutes.

 

Leica GX1200 and GPS900 Series (System 1200)

With the defined SW and ME FW version (SmartWorx 8.71 for the GX1200, RX1200, RX900 and CS09; ME FW 3.823 for ATX1200 and ATX900 with ME3 GG; ME FW 6.112 for ATX1200 and GS09 with ME4), the tracking behaviour for GPS and Galileo of all Leica System 1200 and GPS 900 receivers will not be affected over the leap second change. GLONASS tracking will lose lock briefly and recover a few seconds later.

If a Leica System 1200 or GPS 900 receiver is used after the leap second switch, the receiver should have no trouble tracking GLONASS signals. If there are nevertheless problems tracking GLONASS satellites, an ME reset will resolve the problem faster. In order to perform an ME reset press 5 Config → 2 Instrument Settings → 2 Satellite Settings → shift F4 INIT.

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