Investigation of timing problems (with Specim)

[mggr]

This ticket documents a long term issue in timing of the Specim instruments, but has been hard to pin down. The original text has been altered at Specim's request (21/Sep/2009) to remove direct quotes of emails. A summary has been put in place instead.

Following initial contacts on the issue, Specim requested a dataset with a clear example of the timing problems. A dataset was produced with a single long line including "wobbles". This dataset showed one of two alleged issues - a straight timing offset that appeared to be due to our misuse of CaliGeo.

The second issue is that of a line needing different timing corrections at different parts of the line. Andrew Wilson has previously stated that he saw several of these in 2006 data. We have not been able to replicate this.