If at any stage you are unsure of a parameter just hold the mouse over its label and a pop-up help will appear giving you more information.
Modelling an array is simple within Gundalf Cloud. Just do the following.
After logging in, you enter the geometry definition page. You can add a few guns to the working array using the "Add gun" button. Alternatively you upload an existing array file (one ending in .sba) from your local computer by clicking on the "Library array management" button and following the upload dialog. However you enter it, Gundalf will draw the array for you. When you are satisfied with it, you can continue to the physical parameter section.
Accept all the defaults in the physical parameter section and continue to the service selection section.
Select the top option "Signature model and statistics only". It has a small icon next to it , which matches the equivalent icon in Gundalf Windows. Continue to modelling parameters. Accept all the defaults and continue to the filter parameter section where you choose one of many filtering options if you wish.
Now proceed to the Check modelling details section. If all looks well, press the button to run the Gundalf model.
Gundalf will now model your array and a few seconds later a report will appear. You can read through this in your browser or you can download a pdf file of the report and you are done.
You may now exit and optionally save your working array and/or the whole session (includes the array and inventory/configuration parameters in one file) to your local computer for use later. Gundalf will not retain the array or any inventory/configuration parameters after you exit.