Alfa calibration scans, rotation angle after re installation


    Alfa was reinstalled in the dome on 20apr12 after being worked on in the lab (new amplifiers were installed). Spider scans (heiles calibration scans) were taken with alfa on 27,28apr12 using beams0..6
This data was taken with model17 with the tiedown positions for model17. Pointing model 18 was taken in mar12 but had not yet been installed.

The setup:

Calibration run results:

The plots show the   calibration results (.ps) (.pdf):
On 03may12 the alfa model was updated to remove the constant offsets (3.09,7.34).This will get updated again when model 18 is installed.

Fitting for rotation angle error:

    Part of the pointing error could come from the alfa rotation angle being off. To test for this :
    Plots showing the pointing error vs rotation angle offset (.ps) (.pdf):


Still to do:

processing: 120427/x102alfa/