To submit flight requests for the NASA Portable Remote Imaging Spectrometer (PRISM) in FY2018, visit the website below. NASA's Airborne Science Program Online Flight Request System (SOFRS) These requests are for data acquisitions during the period from October 2017 to September 2018. PRISM investigators are requested to submit FY 2018 Flight Requests before September 30, 2017. New PRISM Investigators should register an account and login via the SOFRS. View the 2018 NASA Airborne Science Program Call Letter: https://airbornescience.nasa.gov/sites/default/files/documents/FY18%20ASP%20Call%20LETTER%20rev%201.pdf.