The NASA Jet Propulsion Laboratory (JPL) Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) sensor was flown over the SnowEx Intensive Observation Period (IOP) study sites in Grand Mesa and Senator Beck Basin (labeled Telluride), Colorado during March 2017, as well as over the SnowEx Western United States Time Series study sites in Idaho, Utah, Montana, New Mexico, and California from December 2019 to March 2020 and January 2021 to March 2021. The instrument was mounted on the wing pod of a Gulfstream-III jet. All SnowEx UAVSAR L-band data are stored and available for download from the JPL UAVSAR Data Search page. Following JPL guidelines, UAVSAR campaign data are named after the closest city to each study site, and therefore may differ from the SnowEx site name.

• Find the SnowEx 2017 data on the JPL UAVSAR Data Search website by selecting “L-band” from the list of Band options and typing “Telluride, CO” or “Grand Mesa, CO” in the search box under Find.
• For the SnowEx 2020 and SnowEx 2021 campaigns, data are available for 13 sites. A list of these sites and their corresponding UAVSAR campaign names can be found in Table 2 of the provided technical reference. Find the SnowEx 2020 and SnowEx 2021 UAVSAR data on the JPL UAVSAR Data Search website by selecting “L-band” from the list of Band options and typing the desired UAVSAR campaign name in the search box under Find.