HST Focus Model

Calculations of the HST focus model and measurements of the HST focus are presented. Model results can be obtained for any time range at 5 minute intervals beginning on March 9th 2003.

Measured values are available for about one hour each month. Each camera has its own operational time period, listed below, during which focus measurements were made A comparison between measurements and the model may be chosen for the measurement time periods.


Display
Model
Measurement
Comparison

Camera
ACS / HRC.....January 22nd 2003 to January 21st 2007
WFC2 / PC.....January 22nd 2003 to May 7th 2009
ACS / WFC1....January 2003 to April 2005 and August 2009 to present
ACS / WFC2....January 2003 to November 2006 and August 2009 to present
WFC3 / UVIS1..August 2009 to present
WFC3 / UVIS2

Year: Years 2003 to present