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Solar Irradiance Platform (SIP)

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Run Instructions:


    1. Start an IDL session (IDL v6.0 or higher must be licensed and running prior to starting the SIP application). THE DEFAULT DIRECTORY - the Space_Environment_Technologies user account - MUST BE SELECTED. Please note that you must register, purchase, and use a license key to run the SIP Professional_Grade version. For the evaluation version, registration is not required, but we encourage you do so, so that you can receive important notices (email inormation is not distributed or used for any other purpose).

    2.  If you are using a terminal window to run SIP with an existing IDL Application, simply start IDL, then type "SIP" at the command line in IDL. This starts the model and you will see the SIP GUI appear in a separate window. Some platforms are case-sensitive in IDL (e.g. UNIX systems) so please note the lower-case characters.

    3. If you are simply running it within your Desktop (e.g., Finder Window), navigate to the Space_Environment_Technologies folder, and double-click on the "launch_sip" icon.

    To run the SIP application (it can only be run through the GUI), select the desired input parameters from the left-side list menus (5 menus):

    a. Start year [1947-2004]

    b. Start day of year [1-366] (Note: only leap years have 366 days; if day 366 is used for a non-leap year, the program defaults to 1980-366 as the start day and "invalid starting date" is printed in the IDL output log.)

    c. Number of days to model [1-1000] (Note: some computers may have limited memory and will not run 1000 days at a time; if this is the case, either increase the computer memory allocated to IDL or run a smaller number of days.)

    d. Spectral format [indices only, 1 nm bin size full solar spectrum, 39 EUV lines and wavelength groups in the EUV91/EUV97 format, 809 EUV 1 Angstrom lines in the SC#21REFW format. NOTE: the energy flux totals in the 1 nm bin and 809 wavelength bins will not equal each other since the 1 nm flux value is created proportional to the photon flux value divided by the center of the wavelength bin while the 809 flux value is created proportional to the photon flux value divided by the 1 Angstrom wavelength value from SC21REFW. This algorithm may be changed in a future upgrade.]

    e. Flux units [SI (W m-2), photon flux (photons cm-2 s-1), energy flux (ergs cm-2 s-1)] (Note: all wavelength units are in nm and the +-1 sigma uncertainties for each wavelength are listed. Currently, the value of 1.00 is used as a placeholder for this field in the 1 nm and 39 wavelength group formats. The delta-lambda unit for the fluxes is determined by the bandpass in each wavelength format.)

    4. Click the "Run" button. THE RUN BUTTON MUST BE CLICKED FOR EACH NEW SETTING OF THE LISTS IN ORDER TO CREATE A NEW MODEL RUN. After a short time, you will see several panels of plots in the GUI window. At this point, the application has run the modeled irradiances for the input parameters that were selected. In the same folder as the application, you will find 3 new files: s2k_output.txt - a text file of irradiance or indices data. This file is accessed from the GUI through the "S2K Output" button; the text can be selected, copied, and pasted into another application or the file can be opened separately as a text file. s2k_tsi.txt - a text file of the solar irradiance spectrum (1 nm bins) for the first day of the run. This file is accessed from the GUI through the "S2K spectrum" button. s2k_plot.tif - a TIFF picture file of the same data displayed in the GUI window for this run of the model. The 3 rows of plots include: TOP ROW: Integrated solar spectrum (left), coronal input in F10.7 units (center), and chromospheric input in Lyman-alpha (or Mg II cwr reported in Lyman-alpha units) (right); MIDDLE ROW: first day solar spectrum in SI units in 1 nm bin (left) and first day soft X-ray/EUV spectrum through Lyman-alpha in SI units in 1 nm bins (right); BOTTOM ROW: comparison of the F10.7 (dash line) and E10.7 (dotted line) proxies for the time period Selected (day 0 is the starting date).

5. You may print your S2K Output file to a local printer or a PS file if that is an option of your printer with the "Print" button.

6. You may click the "About SIP" button to read the LICENSE AGREEMENT, SIP PUBLICATION ACKNOWLEDGEMENT, SIP RELEASE NOTES, and the SIP USER GUIDE (this document).

7. You may click the SIP Sun-Planet logo to view the "About SpaceWx" text file containing general information about SpaceWx.

8. To quit the SIP application. click the "Quit" button.

For additional information, see Frequently Asked Questions (FAQ)


Known Bugs and Solutions:

1. If the SOLAR2000 Research Grade GUI application is run with a number of days to model that extends past the last valid date, the program may ungraciously stop. The GUI is being asked to display invalid dates and/or indices and the program must be restarted. In this case, simply exit IDL, start a new IDL session, and restart the GUI, taking care to not run the model past the last valid date.
2. If the 'Print' button on the GUI is used for printing the plot file the right-hand border of the displayed plot may not be reproduced. The file 's2k_plot.tif' is the default plot file and is fully displayed with graphic software. Other print options include using the cursor to click and highlight one of the three plot panels then print that panel from IDL. Another alternative is to highlight a panel, copy the plot panel contents into the computer's internal buffer or 'clipboard', then paste, print, and/or save the graphic within a graphics program.