United States citizens do not need a U.S. visa or passport for travel to Georgia. If you are not a US citizen, you may need a visa for entry into the US.
Once you register for the conference, you can download a letter indicating that you will be attending the conference.
For additional information regarding visas and/or passports, please visit http://travel.state.gov/
If you encounter a longer than anticipated delay or other difficulties in obtaining a US visa to attend the AP-S/USNC-URSI Symposium and Radio Science Meeting, you may benefit from the procedure described on the following Website of the SU National Academies of Sciences, Engineering and Medicine (http://sites.nationalacademies.org/PGA/biso/visas/PGA_048197).
This site provide a link to a questionnaire that can be completed it
• You are a student, scholar or professional in the sciences
• You have applied for a non-B1 visa to come to the United States for science-related activities and your application has been undergoing administrative processing for 60 days or longer OR you have applied for a B1 visa to come to the United States for science-related activites and your application has been undergoing administrative processing for 30 days or longer AND it is 14 or fewer days prior to the US event’s start date.
If you satisfy these criteria, it is STRONGLY urged that you complete the questionnaire. Doing so will enable the US National Academies to report urgent cases to the US Department of State, and this in the past has at time facilitated completion of the visa process.