Development blog

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2016-08-20 Printed circuit boards ready

The first run of printed circuit boards has been received and the front panels for the enclosures have been sent off for laser-cutting.

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2016-07-20 Time-transfer results from the NVS NV08 GNSS receiver

We have been testing the NVS NV08 GNSS receiver for suitability as a L1 time-transfer receiver. The CGGTTS data plot below shows a common-clock comparison between a Javad receiver and a NVS receiver, with both receiver antennas having cm-accurate positions. The RMS residual difference between the difference of the two data sets and a linear fit to the same is 3 ns.

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2016-07-15 First time-transfer results from the ublox LEA-M8T GNSS receiver

The ublox 8 series timing receivers can be used for GPSCV time-transfer. In the CGGTTS data plots below, REF is a Javad receiver, and CAL is the ublox receiver. The receivers are measured against the same caesium beam standard. The RMS residual difference between the difference of the two data sets and a linear fit to the same is 4 ns. Some of the noise will be due to imprecise antenna co-ordinates for the ublox receiver.

Support for the ublox receivers has now been merged into the Develop branch.

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