ascascreen/tkascascreen

• ascascreen is a Perl program designed to make it easier to generate cleaned data. It creates a script and then feeds this script to xselect. We recommend initial cleaning be performed using this script.

• ascascreen prompts the user for clean criteria and lists the standard default. The clean criteria used are...
  • Angle from bright Earth limb
  • Angle from Earth limb
  • Cut-off rigidity (alias McIlwain L)
  • Time from day/night transition (SIS)
  • Time from SAA passage
  • Number of CCD pixels above threshold (SIS)

• For the SIS ascascreen checks what clocking modes are available and whether the area discriminator is in use. These cases should be analyzed separately because background and response characteristics differ.

• For the SIS ascascreen runs the sisclean command to remove flickering pixels. For the GIS ascascreen runs the gisclean command to improve background rejection (it may be necessary to fill the RTI column in your events files - if you get asked whether you want this done say yes).

• The end result of an ascascreen run is a single event file which can be read back into xselect for further cleaning and data product creation.

• tkascascreen is a GUI-driven version of ascascreen.