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Running The Fluence Check GUI


FluenceCalcGUI.py is a Python script that will help you calculate the fluence ACIS will acquire in a specified time interval. The tool allows you to take into account:
  1. Clean Time (i.e. ACIS time with neither grating in)
  2. ACIS LETG Time
  3. ACIS HETG Time
  4. HRC Time




    5. Instantiation

    To run the GUI, you must:

    1. Log on as acisdude


    2. At the prompt execute:

      /data/acis/LoadReviews/script/FLUENCECALC/FluenceCalc






    Operation

    The following image shows a sample calculation done with the Fluence GUI. The description will reference this image.



    The GUI is divided into 6 sections:
    1. Toolbar
    2. Initial Conditions section
    3. CLEAN Time display
    4. Gratings input section
    5. HRC input section
    6. Output section




    Toolbar


    The Tool bar consists of 5 buttons; ONLY THREE OF WHICH are operational:
    1. Clear Entries
    2. Calculate Fluence
    3. Quit


    Clear Entries

    Clicking on this button will clear out all entries onthe GUi except the NOW TIME entry of the Initial Conditions Box.

    Calculate Fluence

    Clicking on this button will cause the GUI to calculate the predicted fluence on ACIS between NOW TIME and RADMON DISABLE TIME.

    Quit

    Clicking on this button exits the GUI



    Initial Conditions Section

    This section allows you to enter the overall time interval over which you want to calculate the fluence, the present flux and the present fluence accrued by ACIS (if any). While the GUI automatically inserts the present time (in CHANDRA DOY format), you are not restricted to using only that time for NOW - you can use any time so long as it's prior to RADMON DISABLE TIME. Likewise, RADMON DISABLE TIME can be any time after the NOW entry. These are text boxes and you can cut/paste as you like. Inputs are expected to be in CHANDRA DOY format). Present flux is initialized to zero. You enter the Present Flux and Present Fluence. You can get them from any of the three ACIS R/T Web pages. The hours and seconds display will be updated for youwhen you click on "Calculate Fluence").




    Clean Time Section

    This is an output-only section. When you calculate the fluence, the program will calculate all the ACIS time that exists in the time interval where there is NO grating. It will show you that time in hours and in seconds. The fluence calculator will display the fluence contribution for ACIS under no gratings in the "ACIS CLEAN Time fluence Calculation" text box.



    Gratings Section

    This section allows you to enter in a time interval in which ACIS is in the focal plane AND either HETG or HETG is in. The user inputs the IN and OUT time. When fluence is calculated, the hours and seconds of grating time will be displayed along withthe fluence contribution for that time interval. The HETG and LETG attenuation factors (5.0 and 2.0 respectively) are included in the calculation.
    NOTES:
    1. There is only one entry for each type of gratings observation. If there should be two LETG or two HETG observations in the time interval and they are not consecutive observations, you can adjust your IN/OUT times to reflect the sum total of gratings observing time.
    2. The system assumes that any grating entry made by you represents an ACIS observation. Obviously, an HRC gratings observation is not entered here (though it is entered in the HRC section below).




    HRC Section

    Any HRC observing time in the overall time interval is recorded here. If there are two or more non-contiguous HRC observations in the interval, adjust the IN/OUT times to reflect the total HRC observing time.



    Output Section

    The final section will display the additional fluence accrued by ACIS over the time interval ("Additional Fluence") and the Total Fluence - the sum of the Present fluence and Addtional Fluence.