SUMMARY
The transit tracking data taken since the discovery data have invariably been taken with the s-correction (TEL_EMPIRICAL.dat) activated. This report shows the totality of data displayed as if the s-correction had not been activated during data acquisition.

The 'transit' problem was noticed first in April . A correction was installed on 16 May, but recent checks in May, June and twice in July, and once again in August have been inconclusive for various reasons.

If there has been some change in the error pattern in the past half year or so, it might manifest itself better if the tracking data were corrected back to their 'raw' state - i.e. as if the s-correction had not been applied. Code was written to do this and the 9 datasets taken this year and amenable to this display are shown below. Click on the figure to see it full-size :

Conclusions

• Most of the data actually do not appear symmetric about azimuth 180. Only the 'discovery' data of April seem symmetric in this way.
• Since then the error pattern shows an azimuth symmetry that increases to about 184 in July and decreases to 182 in August.