To request a free copy of IMPACT, use the link below. IMPACT is intended for government use. A non-government partner can obtain IMPACT with a government sponsor. Use is restricted to non-commercial applications. Please include your name, agency, and phone number in the request using your agency
, not personal, email system.
Note: If the above request link does not work with your email system, send an email to
with the sentence, "I attest that the export control restrictions do not apply to me or my organization and that I have read and agree to the end-user license terms."