Azimuth encoder1 failures in aug09
The azimuth 1 encoder has been failing during
the later part of july and the start of aug09. This failure introduces
a pointing error of up to 65 asecs (more
Plots were made of all of the encoder 1 and
encoder 2 failures for 27jul09 thru 04aug09 (.ps) (.pdf):
- Top: az encoder 1 failures
- Bottom: az encoder 2 failures.
- The red dashed lines are the start of the ast day.
- for 31jul thru aug02 much of the time (weekend) was using az
encoder 2 for pointing. This introduced a pointing error of up to 65