Date of data collection: 12 April 2025 / 10 May 2025 / 14 June 2025 / 12 July 2025 Each folder contains three subfolders with the data collected by CAP and submitted to GLOBE and the GLOBE Clouds team at NASA Langley Research Center. Subfolders within each date file are (1) Aircraft Information, (2) Cloud Reports and Satellite Comparison, and (3) METARs. Folder 1 contains aircraft information collected by CAP and an issues file (when possible). Folder 2 contains cloud reports submitted to GLOBE with satellite collocations to GOES and NOAA-20. Folder 3 contains METAR data when available. These data are referenced, used, and described in Colón Robles et al. (2026) and Autore et al. (2026). NOTE - 12 April 2025 does not have contrail information in folder 1. Geographical location of the data collection: CONUS & Puerto Rico; AWM_GeolocationGroundObservations shows maps of all observation locations per mission date. CAP regions definition: Great Lakes Region - Illinois, Indiana, Kentucky, Michigan, Ohio, Wisconsin Mid-Atlantic Region - Delaware, Maryland, Washington, D.C., North Carolina, South Carolina, Virginia, West Virginia North Central Region - Iowa, Kansas, Minnesota, Missouti, Nebraska, North Dakota, South Dakota Northeast Region - Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont Pacific Region - Alaska, Hawai'i, Washington, Oregon, California, Nevada Rocky Mountain Region - Idaho, Montana, Wyoming, Utah, Colorado Southeast Region - Alabama, Florida, Georgia, Mississippi, Puerto Rico, Tennessee Southwest Region - Arizona, New Mexico, Oklahoma, Texas, Arkansas, Louisiana Data description: The 2025 Aviation Weather Mission was a nationwide effort by Civil Air Patrol (CAP) and NASA to collect atmospheric data and contrail information. Between April and July 2025, CAP members recorded sky conditions, tracked commercial aircraft, and reported contrail types. Cloud, contrail, and airplane information were collected during four separate 4-hour mission dates (April-July) collected during 8am and noon local time. Over 1,300 commercial airplanes were tracked from coast to coast. CAP used the GLOBE Program’s GLOBE Observer (GO) app and paper data sheets to report cloud and contrail observations, airplane altitude, aircraft registration number, and angle of tracked airplanes. Photographs of the sky in the direction the airplane was first observed were taken at 0, 3, 5, 10, and 15 minutes after initial airplane observation. These images were submitted in the up direction image requested through the GLOBE Observer’s app automatic photo request. Every 15 minutes a full cloud observation was submitted through the app. Observation type description: Observation Type Description Notes Airplane altitude, registration number & aircraft type CAP members selected a commercial airplane to observe every 15 minutes. Altitude, registration number, and aircraft type were obtained using flight following software. Only commercial airplanes above 20,000ft were selected. Cloud cover and cloud types, including contrail types Percent of cloud cover and record of cloud types present through the GLOBE Observer app. If a contrail was being created by the airplane tracked, it was classified as short-lived, persistent non-spreading or persistent spreading. GO app Clouds tool (Colón Robles et al., 2020) was used to report clouds. Latitude, longitude, azimuth CAP members practiced basic orienteering to collect latitude and longitude of their location. The azimuth was measured for the tracked airplane. Sextants were used to measure direction and angles. Latitude and longitude are measured automatically by the GO app. Sky photographs In addition to sky photographs taken through the GO app, CAP members took photographs of the patch of sky when they started tracking the airplanes every 5 minutes to note any changes, particularly to contrails present. The GO app guides users to take photographs in each cardinal direction at a 14-degree angle. Data Derived from another source:The NASA GLOBE Clouds team at NASA Langley Research Center in Hampton, Virginia, USA receives all overhead cloud reports from human observers submitted through the GLOBE (Global Learning and Observations to Benefit the Environment) Program. The ground-based cloud observations submitted through various protocols and methods, including the GLOBE Observer mobile app, are then collocated with satellite observations of clouds from various Earth-observing platforms, a process referred to as a satellite comparison. This data features comparisons to NOAA-20, GOES 18, and GOES 19 from CERES FLASHFlux and SatCORPS. Files: Each zip file contains ground-cloud observations collocated to satellite data, CAP data sheets with contrail observation and aircraft information. A README tab is included that describes the information. The data obtained from NASA Langley Research Center (NASA Langley), the GLOBE Program, and Civil Air Patrol are free of charge for use in research, publications, and commercial applications. When data from NASA Langley, the GLOBE Program, and Civil Air Patrol are used in a publication, we request this acknowledgment be included, "These data were obtained from NASA Langley Research Center, the GLOBE Program, and the Civil Air Patrol." Please include such statements, either where the use of the data or other resource is described, or within the acknowledgements section of the publication. Acknowledgements: GLOBE Clouds at NASA Langley Research Center would like to thank the following teams for their support and collaboration: CERES, FlashFLUX, SatCORPS, and ASDC. Journal References: Autore, A.M., J.B. Dodson, D.P. Duda, M. Colón Robles, S. Babb, T. M. Rogerson, R. Moore, and J. Taylor, 2026: Part 1 - The 2025 Aviation Weather Mission: Tracking Contrails with NASA and the Civil Air Patrol. Unpublished manuscript. Colón Robles, M., A.M. Autore, M. Nyman, H. Fischer, S. Babb, R. Vitanza, J. Taylor, K. Weaver, H. Kohl, and T. Schwerin, 2026: Part 2 - The 2025 Aviation Weather Mission: Cadet Engagement and Evaluation Results. Unpublished manuscript.