GPS and accelerometer tracking data of individual dark-bellied Brent geese, linked to metadata on bathymetry and tidal information. For details, see main manuscript and its supplemental material.

ID: identifier of individual bird
DateTime: date and time in UTC
lat: latitude in decimal degrees
lon: longitude in decimal degrees
RDX: x-coordinate in Rijksdriehoekscoordinaten (Dutch national Cartesian grid) in metre
RDY: y-coordinate in Rijksdriehoekscoordinaten (Dutch national Cartesian grid) in metre
GPSHeight: bird's height as measured with GPS in metre
GPSSpeed: bird's speed as measured with GPS in m/s
GPSTemperature: temperature as measured with sensor on GPS device in Celcius
DateTimeString: date and time in UTC
TimeIntervalFix: time interval assigned to this fix in second
TimeRangeFix: time interval range in absolute time (seconds since 1 jan 1900)
ACCNBursts: number of accelerometer bursts (one burst contains a number of samples collected at 20 Hz)
ACCNSamples: number of accelerometer samples
ACCFractionActive: proportion of time the bird was active, as determined from accelerometer samples
ACCStdDevXYZ: tri-axial acceleration standard deviation (referred to as parameter gamma in supplemental material)
ACCMeanXYZ: mean tri-axial acceleration
ACCStdDevX: X-axis acceleration standard deviation, based on all ACC samples collected in interval TimeIntervalFix
ACCStdDevY: Y-axis acceleration standard deviation, based on all ACC samples collected in interval TimeIntervalFix
ACCStdDevZ: Z-axis acceleration standard deviation, based on all ACC samples collected in interval TimeIntervalFix
ACCMeanX: mean X-axis acceleration, based on all ACC samples collected in interval TimeIntervalFix
ACCMeanY: mean Y-axis acceleration, based on all ACC samples collected in interval TimeIntervalFix
ACCMeanZ: mean Z-axis acceleration, based on all ACC samples collected in interval TimeIntervalFix 
Ongrass: true when on a location with pasture, false when not
SeabedHeight: bathymetry in cm NAP
TidalHeight: height of the tides
EmersionTime: total duration of exposure in this tidal cycle
TimeSinceExposure: time since this location has been exposed
MeanExposed: average exposure time for this location (calculated as a multi-year average)
EmersionPhase: tidal phase for this location. emerged time runs from 0 to 1, submerged time runs from -1 to 0
LowDuration: duration of the low tide period, at the bird's current location. Tidal height 0 separates low from high tide.
TimeSinceLow: time passed since the onset of low tide, at the bird's current location
TidalPhase: the reference tidal phase at the current bird's location. low tide period runs from 0 to 1 (low tide defined as tidal height below 0 mean sea level), high tide runs from -1 to 0 (high tide defined as tidal height above 0 mean sea level)