= VIRUS Defocus Spectral Flat (DSF) Procedure =


Note that this procedure can take 15-45 minutes per unit, depending on the warmup times and commands used. If you are attempting to acquire DSF data for multiple units, be warned that it may take some time.


== Procedures for setting up the UNITS: ==




== Procedures for taking the data ==

Note we are trying to use the same numbering for engineering tests so for the test exposures please use the 6000s and the final DSF exposures please use
7000-7099.

Here is a brief summary of what we do to take the data:

* {{{ ipvg off -V }}}  # Turn off the IP and VG 

* {{{ cal virus -c ldls_long -C 1 -o 6000 -bce 1.3 }}}  # take a single exposure with twice the exposure time to test exposure length

* {{{ cd /hetdata/data/YYYYMMDD/virus0006000/exp01/virus/ }}}    # where YYYYMMDD is the current UT date (note takes a few minutes to arrive fully)

* {{{ ds9v }}}   #  look for all amps which were modified and the brightest one (based on the scale) should be about 45k.

* {{{ cal virus -c ldls_long -C 1 -o 6001 -bce X.X }}}   # where X.X is the new exposure time based on the previous exposures

* {{{ cd ../../../virus0006001/exp01/virus/ }}}     # change directory to where the new data is (note takes a few minutes to arrive fully)

* {{{ ds9v }}}  #  look for all amps which were modified and the brightest one (based on the scale) should be about 45k.

* {{{ cal virus -c ldls_long -C 30 -o 7000 -bce Y.Y }}}  #  where Y.Y is the final exposure time based on the previous exposure

* {{{ ipvg on -V }}}

{{{ Proper syntax on Oct10,2019 is:  cal virus -l ldls_long -L 1 -o 6001 -bexp 0.8  }}}