Geophysical Survey Systems, Inc. (GSSI) is committed to providing our customers comprehensive support. This Tech Support web site contains sections for GSSI products including SIR 4000, SIR 30, StructureScan Mini, UtilityScan DF, RADAN and others. You are encouraged to check this site frequently for new and updated information. Some of the Features Include: Contact Need assistance? Contact us; via web form, softwareTechSupport@geophysical.com or by phone : 1-603-893-1109 Products Software and Firmware updates, user’s manuals, product and data images, and technical documents Resources Visit frequently asked questions, manuals and quick start guides, and regulatory information Accounts Manage your RADAN activations Note: If you are unable to access an existing account or would like to create a new account, please fill out the registration form found here. New to the site? Please go over the instruction for login, registration and account management.