This .csv file containts for every goose with tracking device all GPS-fixes (resampled to 30-min intervals) from 01-01-2015 to June 2015. This data was used as input for the Body Mass Trajectories (BMTs). The following columns contain: device_ID: Number of the tracking device date: date in dd/mm/yyyy format time: time in hh:mm:ss format, time in UTC date_time: date-time in dd/mm/yyyy hh:mm:ss format day_number: day of the year duration_min: duration in minutes between subsequent GPS-fixes sunrise: time of local sunrise, time in UTC sunset: time of local sunset, time in UTC daytime: binary variable for fixes during daytime (1) or night-time (0) behavior: behavioral classess as derived from accelerometer data, including: grazing, inactive, active and flying longitude: longitude latitude: lattitude altitude: altitude in meters above sea level gps_speed: gps_speed in meters per second corine_landuse_1: landuse class as extracted from Corine landuse dataset, upper level corine_landuse_2: landuse class as extracted from Corine landuse dataset, lower level corine_landuse_corrected: landuse class as extracted from Corine landuse dataset, corrected as described in methods Area: area in which the GPS-fix is taken: "NL" = wintering grounds (extending to 10 degrees longitude), "BA" = Baltic stagings sites, between 10 and 32 degrees longitude, "RU" = Russian staging grounds, further east than 32 degrees longitude, "RU_B" = Russian breeding grounds, being the Tobseda breeding colony at 68°35’N, 52°20’E combined: corine_landuse_corrected and Area combined as ID column temperature: temperature in Celcius degrees radiation: Long and shortwave radiation in watts per square metre windspeed10m: windspeed at 10m heigth in meters per second winddirection: wind direction in degrees GDD: Growing Degree Days, a cumulative temperature sum in Celcius degrees