Filter wheel usage
The data used were up to 2006-02-01 and extracted from the sequential print logs on msslje.
Total rotatons and moves
Total complete 360 degree rotations in orbit: 14738
Total number of movements in orbit: 46525
Rotations and moves per month
The number of rotations and movements has increased with January being very high. In January there were lots of GRBs and
efficiency was improved a little with the code load.
This graph shows the number of movements (in RED) and the number of rotations
(in GREEN). The x-axis is date and the y-axis is number.
The graph is a histogram of settling accuracy in 1 acrmin bins.
Filter usage
This graph shows the number of times each filter was used since launch.
Movements length (number of steps to next filter)
This graphs shows the number of steps for each movement (steps for each move)
since launch. The movements are binned in 200 step bins.
Interpretation
- When looking at lifetime, remember the filter wheel is qualified for 50 000
revolutions.
- The blocked and V filters are used the most.
- The movement length graph has roughly equal peaks representing the movements between
blocked & V and V & blocked (600 and 1600 steps).
- There are no movements of 2200 in normal use.