This Garde_etal_2021_readme.txt file was generated on 25/01/2021 by Baptiste Garde



GENERAL INFORMATION

1. Title of Dataset: Fine-scale changes in speed and altitude suggest protean movements in homing pigeon flights

2. Author Contact Information
		Name: Baptiste Garde
		Institution: Swansea University
		Address: Singleton park, Swansea SA28PP, United Kingdom
		Email: baptiste.garde@swansea.ac.uk

3. Date of data collection:
		First season: 24/07/2018 to 31/07/2018
		Second season: 03/04/2019 to 18/04/2019

4. Geographic location of data collection: 
		Location: Radolfzell, Baden-Württemberg, Germany
		Collaborative Institution: Max Planck Institute of Animal Behavior
		Latitude: 47.815
		Longitude: 9.000

5. Information about funding sources that supported the collection of the data: 
		This work was supported by the European Research Council under the European Union’s Horizon 2020 research and innovation program Grant 715874 
		Fieldwork was also supported by a Max Planck Sabbatical Fellowship to ELCS



SHARING/ACCESS INFORMATION

1. Licenses/restrictions placed on the data: CC BY

2. Links to publications that cite or use the data: Currently in press

3. Links to other publicly accessible locations of the data: 
		Movebank: https://www.movebank.org/cms/webapp?gwt_fragment=page=studies

5. Recommended citation for this dataset: 



DATA & FILE OVERVIEW

1. File List: (by order of appearance in the script)
	MAIN DATA:
		Garde et al_protean flight behaviour.R
		ClimbRate_DatSum_2018.txt
		ClimbRate_DatSum_2019.txt
		Individual data files: ddmmyy_pID_1Hz.txt (Example: "180419_p238_1Hz.txt")
		ClimbRate_DatSum.txt
		ClimbRate_BirdInfo_FULL.txt 	
		ClimbRate_DatSum_FULL.txt
		ClimbRate_alldata_FULL.txt
	SUPPLEMENTARY INFORMATION DATA:
		SI_Pigeon736_DD_050419.txt
		SI_Pigeon736_GPS_050419.txt
		SI_Ultralight_DD_050419.txt
		SI_Ultralight_GPS_050419.txt

2. Relationship between files, if important: 
		Climbrate_DatSum, _2018, _2019, _FULL all correspond to the same data with different processing (see script). For statistical analysis, please use ClimbRate_DatSum_FULL.txt
		ClimbRate_alldata_FULL.txt contains data from each individual data file
		The whole script is detailed in Garde et al_protean flight behaviour.R

3. Additional related data collected that was not included in the current data package: NA

4. Are there multiple versions of the dataset? no



METHODOLOGICAL INFORMATION

1. Description of methods used for collection/generation of data: 
		Please see Methods in: https://doi.org/10.1101/2021.01.20.427436

2. Methods for processing the data: 
		All datasets must be saved in a folder named "Processed files" in R's working directory
		For further information, please see Methods in https://doi.org/10.1101/2021.01.20.427436
		Processing is detailed in "Garde et al_protean flight behaviour.R"

3. Instrument- or software-specific information needed to interpret the data: 
		DDMT ()
		R version 4.0.3
		R Studio version 1.3.1093

4. Standards and calibration information, if appropriate: NA

5. Environmental/experimental conditions: 
		Please see Methods in: https://doi.org/10.1101/2021.01.20.427436

6. Describe any quality-assurance procedures performed on the data: 
		Please see Methods in: https://doi.org/10.1101/2021.01.20.427436

7. People involved with sample collection, processing, analysis and/or submission: 
The experiment was discussed and designed by Emily L. C. Shepard, Martin Wikelski, Michael Quetting, Giacomo Dell’Omo and Baptiste Garde, and conducted by Emmanouil Lempidakis, Michael Quetting and Baptiste Garde. Statistical analysis was carried out by Baptiste Garde and led by Luca Börger. Interpretation of the results and the main design of the manuscript were directed by Emily L. C. Shepard and Rory P. Wilson. 
Steven J. Portugal and Anders Hedenström contributed to crucial theoretical and practical elements of the writing of the manuscript and the understanding of the data. Baptiste Garde, Emily L. C. Shepard, Rory P. Wilson and Steven J. Portugal wrote the manuscript. All authors contributed to the revision of the manuscript. All authors gave final approval for publication and agree to be held accountable for the work performed therein.

	

DATA-SPECIFIC INFORMATION FOR: ClimbRate_DatSum_2018.txt

1. Number of variables: 16

2. Number of rows: 34

3. Variable List: 
"Flight"	Character	Number attributed to each flight everyday, in the order of releases
"Bird.ID"	Character	Last digits of a bird's leg ring
"Tag.ID"	Character	ID of the GPS-daily-diary unit
"Turb"		Num (integer)	NOT USED; Assessment of the air turbulence on a scale between 0 and 5
"Mass"		Numeric		Bird mass (g)
"wing.area"   	Numeric		Bird wing area (m)
"wingspan"     	Numeric		Bird wingspan (m)
"Stops"        	Character	Empty if birds did not stop during the homing flight, otherwise displays the time when the bird stopped
"Route"        	Character	Route between Valley or Hill
"Folder.Date"  	Character	Previously used to locate the file, now used to indicate the season
"Start"        	Time		Starting time of the flight (after initial circling); format hh:mm:ss
"End"         	Time		Ending time of the flight (before final descent & circling); format hh:mm:ss
"ACC.File"    	Character	Name of the Daily Diary file containing the data; format ddmmyy_birdID
"Sea.Pressure" 	Numeric		Mean sea level pressure recorded by the wheather station at the release site (hPa)
"ACC.File2"    	Character	NOT USED; Name of the Daily Diary file containing the second part of the data; format ddmmyy_birdID
"GPS.File"    	Character	NOT USED; Name of the GPS File and directory in previous versions

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: NA



DATA-SPECIFIC INFORMATION FOR: ClimbRate_DatSum_2019.txt

1. Number of variables: 17

2. Number of rows: 54

3. Variable List: 
"Flight"	Character	Number attributed to each flight everyday, in the order of releases
"Bird.ID"	Character	Last digits of a bird's leg ring
"Tag.ID"	Character	ID of the GPS-daily-diary unit
"Turb"		Num (integer)	NOT USED; Assessment of the air turbulence on a scale between 0 and 5
"Wind"		Num (integer)	NOT USED; Average wind speed recorded
"Mass"		Numeric		Bird mass (g)
"wing.area"   	Numeric		Bird wing area (m)
"wingspan"     	Numeric		Bird wingspan (m)
"Stops"        	Character	Empty if birds did not stop during the homing flight, otherwise displays the time when the bird stopped
"Route"        	Character	Route between Valley or Hill
"Folder.Date"  	Character	Previously used to locate the file, now used to indicate the season
"Start"        	Time		Starting time of the flight (after initial circling); format hh:mm:ss
"End"         	Time		Ending time of the flight (before final descent & circling); format hh:mm:ss
"ACC.File"    	Character	Name of the Daily Diary file containing the data; format ddmmyy_birdID
"Sea.Pressure" 	Numeric		Mean sea level pressure recorded by the wheather station at the release site (hPa)
"ACC.File2"    	Character	NOT USED; Name of the Daily Diary file containing the second part of the data; format ddmmyy_birdID
"GPS.File"    	Character	NOT USED; Name of the GPS File and directory in previous versions

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: NA



DATA-SPECIFIC INFORMATION FOR: ClimbRate_DatSum.txt

1. Number of variables: 20

2. Number of rows: 29

3. Variable List: 
"Flight"	Character	Number attributed to each flight everyday, in the order of releases
"Bird.ID"	Character	Last digits of a bird's leg ring
"Tag.ID"	Character	ID of the GPS-daily-diary unit
"Turb"		Num (integer)	NOT USED; Assessment of the air turbulence on a scale between 0 and 5
"Mass"		Numeric		Bird mass (g)
"wing.area"   	Numeric		Bird wing area (m)
"wingspan"     	Numeric		Bird wingspan (m)
"Stops"        	Character	Empty if birds did not stop during the homing flight, otherwise displays the time when the bird stopped
"Route"        	Character	Route between Valley or Hill
"Folder.Date"  	Character	Previously used to locate the file, now used to indicate the season
"Start"        	Time		Starting time of the flight (after initial circling); format hh:mm:ss
"End"         	Time		Ending time of the flight (before final descent & circling); format hh:mm:ss
"ACC.File"    	Character	Name of the Daily Diary file containing the data; format ddmmyy_birdID
"Sea.Pressure" 	Numeric		Mean sea level pressure recorded by the wheather station at the release site (hPa)
"ACC.File2"    	Character	NOT USED; Name of the Daily Diary file containing the second part of the data; format ddmmyy_birdID
"GPS.File"    	Character	NOT USED; Name of the GPS File and directory in previous versions
"Wind.Speed"	Numeric		Wind speed (m s-1)
"TripDuration"	Numeric		Duration of the trip including only travelling time (s)
"TripLength"	Numeric		Distance covered durign the trip (excluding circling) (m)
"SlopeMod1"   	Numeric		NOT USED; Slope of the regression Vz ~ Va for this flight

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: 
		Vz = Rate of change of altitude (m s-1)
		Va = Airspeed (m s-1)



DATA-SPECIFIC INFORMATION FOR: ClimbRate_DatSum_FULL.txt 

1. Number of variables: 10

2. Number of rows: 15

3. Variable List: 
"Flight"	Character	Number attributed to each flight everyday, in the order of releases
"Bird.ID"	Character	Last digits of a bird's leg ring
"Tag.ID"	Character	ID of the GPS-daily-diary unit
"Turb"		Num (integer)	NOT USED; Assessment of the air turbulence on a scale between 0 and 5
"Mass"		Numeric		Bird mass (g)
"wing.area"   	Numeric		Bird wing area (m)
"wingspan"     	Numeric		Bird wingspan (m)
"Route"        	Character	Route between Valley or Hill
"Folder.Date"  	Character	Previously used to locate the file, now used to indicate the season
"Start"        	Time		Starting time of the flight (after initial circling); format hh:mm:ss
"End"         	Time		Ending time of the flight (before final descent & circling); format hh:mm:ss
"Sea.Pressure" 	Numeric		Mean sea level pressure recorded by the wheather station at the release site (hPa)
"GPS.File"    	Character	NOT USED; Name of the GPS File and directory in previous versions
"Wind.Speed"	Numeric		Wind speed (m s-1)
"TripDuration"	Numeric		Duration of the trip including only travelling time (s)
"TripLength"	Numeric		Distance covered durign the trip (excluding circling) (m)
"SlopeMod1"   	Numeric		NOT USED; Slope of the regression Vz ~ Va for this flight
"FlightID"	Character	ID of the flight; format ddmmyy_birdID
"date"		Character	Field season when the flight was recorded (3 = 2018; 6 = 2019)
"MeanVeDBA"	Numeric		NOT USED; Mean VeDBA (g)
"MeanAirspeed"	Numeric		Mean airspeed recorded during the flight (m s-1)
"MeanWBf"	Numeric		NOT USED; Mean wingbeat frequency recorded during the flight (Hz)
"MeanVz"	Numeric		Mean climb rate recorded during the flight (m s-1)
"sdVeDBA"	Numeric		NOT USED; standard deviation of VeDBA (g)
"sdAirspeed"	Numeric		Standard deviation of airspeed (m s-1)
"sdWBf"		Numeric		NOT USED; standard deviation of the wingbeat frequency (Hz)
"sdVz"		Numeric		Standard deviation of the climb rate (m s-1)
"RangeVeDBA"	Numeric		NOT USED; Range of VeDBA (g)
"RangeAirspeed"	Numeric		Range of airspeed (m s-1)
"RangeWBf"  	Numeric		NOT USED; Range of the wingbeat frequency (Hz)
"RangeVz"	Numeric		Range of the climb rate (m s-1)
"Wind.Dir"	Numeric		Wind direction (degrees)
"Start.Time"	Numeric		Time of the first GPS point in seconds
"Season"	Character	Month when the data was recorded
"Ptot"		Numeric		NOT USED; Total power (W)
"Altitude"	Numeric		Flight altitude above sea level (m)
"Elevation"	Numeric		Elevation of the ground under the bird (m)
"AGL"		Numeric		Altitude above ground (difference between altitude and elevation) (m)
"Va"		Numeric		SAME AS "MeanAirspeed"; Mean airspeed recorded during the flight (m s-1)
"range"		Numeric		SAME AS "RangeAirspeed"; Range of airspeed (m s-1)
"Temperature"	Numeric		Temperature (°C)
"Ptotpertime"	Numeric		NOT USED; Total power per second spent in flight
"VaMax"		Numeric		Maximum airspeed recorded during the flight (m s-1)
"VaMin"		Numeric		Minimum airspeed recorded during the flight (m s-1)
"VaRange"	Numeric		Range of airspeed calculated after cleaning the data (m s-1)

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: 
		VeDBA = Vector of Dynamic Body Acceleration
		Va = Airspeed 
		Vz = Rate of change of altitude (climb rate)
		WBf = Wingbeat frequency
		Ptot = total power
		AGL = Altitude above Ground Level



DATA-SPECIFIC INFORMATION FOR: ClimbRate_BirdInfo_FULL.txt 

1. Number of variables: 10

2. Number of rows: 15

3. Variable List: 
"Bird.ID"	Character	Last digits of a bird's leg ring
"mass"		Numeric		Bird mass (g)
"wing.area"   	Numeric		Bird wing area (m)
"wingspan"     	Numeric		Bird wingspan (m)
"season"	Character	Field season corresponding to the measurements of this row (3 = 2018, 6 = 2019)
"Vmp"		Numeric		Minimum power speed estimated for this individual (m s-1)
"Vmr"		Numeric		Maximum range speed estimated for this individual (m s-1)
"Vmax"     	Numeric		Maximum aerobic speed estimated for this individual (m s-1)
"maxpower"	Numeric		Maximum aerobic power that can be performed by this individual (W)
"Va" 		Numeric		Average airspeed recorded for this individual (m s-1)

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: 
		Vmp = Minimum power speed (m s-1)
		Vmr = Maximum range speed (m s-1)
		Vmax = Maximum aerobic/power speed  (m s-1)
		Va = Airspeed (m s-1)



DATA-SPECIFIC INFORMATION FOR: ClimbRate_alldata_FULL.txt

1. Number of variables: 67

2. Number of rows: 9171

3. Variable List: 
"Tnum"		Numeric		Time in s
"Tnum2"		Numeric		Time is s since the bginning of the flight
"Acc_x"		Numeric		NOT USED
"Acc_y"		Numeric		NOT USED
"Acc_z"		Numeric		NOT USED
"Pressure.hbar"	Numeric		Barometric pressure recorded by the pressure logger (hPa)
"Pitch.angle"	Numeric		NOT USED
"heave"		Numeric		NOT USED	
"Dheave"	Numeric		NOT USED
"peak"		Numeric		NOT USED
"wbf"		Numeric		NOT USED
"Pressure2s"	Numeric		Pressure smoothed (hPa)
"Altitude2s"	Numeric		Altitude based on barometric pressure (m)
"VeDBA2s"	Numeric		NOT USED
"SmVeDBA2s"	Numeric		NOT USED
"Sm.Pitch"	Numeric		NOT USED
"VecSumXZ"	Numeric		NOT USED
"SmX"		Numeric		NOT USED
"SmY"		Numeric		NOT USED
"SmZ"		Numeric		NOT USED
"VecSumXYZ"	Numeric		NOT USED
"timestamp"	Time		Time in format YYYY-MM-DD hh:mm:ss
"TagID"		Character	ID of the unit
"location.lat"	Numeric		Latitude (degrees)
"location.long"	Numeric		Longitude (degrees)
"height.above.msl" Numeric	Flight altitude (above sea level) (m)
"ground.speed"	Numeric		Bird ground speed (m s-1)
"date"		Date		Date format DD/MM/YYYY
"time"		Time		Decimal time; format hh:mm:ss.ssss
"Direction.True"Numeric		Wind direction (degrees)
"Wind.Speed"	Numeric		Wind speed
"Temperature"	Numeric		Temperature (°C)
"speed"		Numeric		Bird ground speed (m s-1)
"heading"	Numeric		Bird heading (degrees)
"airspeed"	Numeric		Airspeed (m s-1)
"HWComp"	Numeric		NOT USED
"BirdID"	Character	Last digits of the bird's ring number
"movangle"	Numeric		Climbing angle relatively to horizontal (degrees)
"diffangle"	Numeric		NOT USED
"X_shifted"	Numeric		NOT USED
"Z_shifted"	Numeric		NOT USED
"Ampx"		Numeric		NOT USED
"Ampy"		Numeric		NOT USED
"Ampz"		Numeric		NOT USED
"Pk"		Numeric		NOT USED
"Pp"		Numeric		NOT USED
"DPp"		Numeric		NOT USED
"DPk"		Numeric		NOT USED
"Season"	Character	Field season (3 = 2018, 6 = 2019)
"FlightID"	Character	ID of the flight (format: ddmmyy_BirdID)
"Va"		Numeric		Airspeed (m s-1)
"Vz"		Numeric		Climb rate (m s-1)
"Power"		Numeric		NOT USED
"Powerk"	Numeric		NOT USED
"elev"		Numeric		Ground elevation under the bird (m)
"dsm"		Numeric		Ground elevation under the bird at  (m)
"agl"		Numeric		Altitude above ground level (difference between flight altitude and elevation) (m)
"clc"		Character	Land cover ID (from Corine Land Cover 2012) 
"Land.Cover"	Character 	Simplified land cover (Land = open land, woodlands = forested areas)
"Route"		Character	Route (Hill/Valley)
"LC.sections"	Num (Integer)	NOT USED
"ddsm"		Numeric		Rate of change of elevation (m)
"VxVzAngle"	Numeric		Angle between horizontal and vertical speed vector (degrees)
"dVa"		Numeric		Rate of change of airspeed (m s-1)
"dVa5s"		Numeric		Smoothed rate of change of airspeed (m s-1)
"step"		Numeric		Distance flown since last GPS point (m)
"progress"	Numeric		Proportion of the total flight distance covered

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: NA



DATA-SPECIFIC INFORMATION FOR INDIVIDUAL DATA FILES: ddmmyy_pID_1Hz.txt (Example: "180419_p238_1Hz.txt")

1. Number of variables: 49

2. Number of rows: Variable

3. Variable List: 
"Tnum" 
"Tnum2"   
"Acc_x"  
"Acc_y"  
"Acc_z"           
"Pressure.hbar" 
"Pitch.angle"   
"heave"   
"Dheave"    
"peak"            
"wbf"       
"Pressure2s"
"Altitude2s"
"VeDBA2s"
"SmVeDBA2s"       
"Sm.Pitch"
"VecSumXZ"
"SmX"
"SmY"
"SmZ"             
"VecSumXYZ"
"timestamp"
"TagID"
"location.lat"
"location.long"   
"height.above.msl"
"ground.speed"
"date"
"time"
"Direction.True"  
"Wind.Speed"
"Temperature"
"speed"
"heading"
"airspeed"
"HWComp"
"BirdID"
"Climb"
"movangle"
"diffangle"       
"X_shifted"
"Z_shifted"
"Ampx"
"Ampy"
"Ampz"
"Pk"
"Pp"
"DPp"
"DPk"

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: NA



SUPPLEMENTARY INFORMATION DATA
This regroups the data presented in the supplementary information of the manuscript. 

DATA-SPECIFIC INFORMATION FOR: SI_Pigeon736_DD_050419.txt & SI_Ultralight_DD_050419.txt

1. Number of variables: 99

2. Number of rows: 121373 and 120616, respectively

3. Variable List: 
"Counter"		Num (Integer)	NOT USED
"Total.Event.no."	Num (Integer)	Event number since the beginning of the track
"Event.no."		Num (Integer)	Event number since the beginning of the split
"Acc_x"			Numeric		NOT USED
"Acc_y"			Numeric		NOT USED
"Acc_z"			Numeric		NOT USED
"Mag_x"			Numeric		NOT USED
"Mag_y"			Numeric		NOT USED
"Mag_z"			Numeric		NOT USED
"Temp.C"		Numeric		Temperature (°C)
"Pressure.hbar"		Numeric		Pressure (hbar)
"Date"			Date		Date, format "DD/MM/YY"
"DD"			Num (Integer)	Day, format "DD"
"MM"			Num (Integer)	Month, format "MM"
"YY"			Num (Integer)	Year, format "YY"
"Time.hh.mm.ss"		Time		Time, format "hh:mm:ss"
"Time.hh.mm.ss.ddd"	Time		Time with decimal seconds, format "hh:mm:ss.ddd"
"Total.secs"		Numeric		Total seconds ellapsed since the start of the track (non decimal)
"Decimal.secs"		Numeric		Decimal values for "Total.secs"
"Hours"			Num (Integer)	Hours, format "hh"
"Minutes"		Num (Integer)	Minutes, format "mm"
"Seconds"		Num (Integer)	Seconds, format "ss"
"Anlg"			Numeric		NOT USED
"Light"			Numeric		NOT USED
"Battery.V"		Numeric		NOT USED
"Acc_x.sm"		Numeric		NOT USED
"Acc_y.sm"		Numeric		NOT USED
"Acc_z.sm"		Numeric		NOT USED
"Accel.vectorial.sum"	Numeric		NOT USED
"Accel.vectorial.sum."	Numeric		NOT USED
"Accel.smoothed.vectorial.sum"	Numeric		NOT USED
"Accel.smoothed.vectorial.sum."	Numeric		NOT USED
"Ang.vel"		Numeric		NOT USED
"VeDBA"			Numeric		NOT USED
"Vel.m.s"		Numeric		NOT USED
"Vel.VEDBA"		Numeric		NOT USED
"FFT.cleaned"		Numeric		NOT USED
"FFT.stuff"		Numeric		NOT USED
"FFT.stuff.1"		Numeric		NOT USED
"FFT.stuff.2"		Numeric		NOT USED
"FFT.sweep"		Numeric		NOT USED
"FFT.zero.crossings"	Numeric		NOT USED
"FFT.zero.crossings.manual"	Numeric		NOT USED
"VeSBA"			Numeric		NOT USED
"VeSBA.smoothed"	Numeric		NOT USED
"VeSBA."		Numeric		NOT USED
"VeSBA..smoothed"	Numeric		NOT USED
"ODBA"			Numeric		NOT USED
"ODBA.Sm"		Numeric		NOT USED
"Dyn.AccX"		Numeric		NOT USED
"Dyn.AccY"		Numeric		NOT USED
"Dyn.AccZ"		Numeric		NOT USED
"Smth.Press"		Numeric		NOT USED
"Altitude.smth"		Numeric		NOT USED
"Pressure.change"	Numeric		NOT USED
"Altitude.change"	Numeric		NOT USED
"Median.pressure"	Numeric		NOT USED
"Median.Mag.X"		Numeric		NOT USED
"Median.Mag.Y"		Numeric		NOT USED
"Median.Mag.Z"		Numeric		NOT USED
"accx_submean"		Numeric		NOT USED
"accy_submean"		Numeric		NOT USED
"accz_submean"		Numeric		NOT USED
"GPS.fix.present"	Numeric		NO DATA
"GPS.Longitude"		Numeric		NO DATA
"GPS.Latitude"		Numeric		NO DATA
"GPS.Altitude"		Numeric		NO DATA
"GPS.velocity.m.s"	Numeric		NO DATA
"GPS.ground.speed.m.s"	Numeric		NO DATA
"Norm.Mag.X"		Numeric		NOT USED
"Norm.Mag.Y"		Numeric		NOT USED
"Norm.Mag.Z"		Numeric		NOT USED
"Mag.X.smoothed"	Numeric		NOT USED
"Mag.Y.smoothed"	Numeric		NOT USED
"Mag.Z.smoothed"	Numeric		NOT USED
"AAV"			Numeric		NOT USED
"VeDBA.smoothed"	Numeric		NOT USED
"Speed.Mag.X"		Numeric		NOT USED
"Speed.Mag.Y"		Numeric		NOT USED
"Speed.Mag.Z"		Numeric		NOT USED
"Speed.Mag.Vec_Sum"	Numeric		NOT USED
"Speed.Mag.Vec_Sum.Smoothed"	Numeric		NOT USED
"Mag.heading"		Numeric		NOT USED
"Mag.heading.smoothed"	Numeric		NOT USED
"Mag.vec.sum"		Numeric		NOT USED
"Mag.vec.sum.smooth"	Numeric		NOT USED
"Pitch.angle"		Numeric		NOT USED
"Pitch.smoothed.angle"	Numeric		NOT USED
"Roll.angle"		Numeric		NOT USED
"Roll.smoothed.angle"	Numeric		NOT USED
"Analogue.smoothed"	Numeric		NOT USED
"Activity"		Numeric		NOT USED
"Marked.event"		Numeric		NOT USED
"Cumulative.heading"	Numeric		NOT USED
"DR.Long"		Numeric		NOT USED
"DR.Lat"		Numeric		NOT USED
"DR.Alt"		Numeric		NOT USED
"Diff_Pressure..R.200."	Numeric		Rate of change of pressure at the scale of 1 s (200 events)
"X"             	Numeric		NOT USED

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: NA


DATA-SPECIFIC INFORMATION FOR: SI_Pigeon736_GPS_050419.txt & SI_Ultralight_GPS_050419.txt

1. Number of variables: 9

2. Number of rows: 34991 and 35792, respectively

3. Variable List: 
"TagID"			Character	Logger identifier
"timestamp"		Time		Time and data, format "dd/mm/yyyy hh:mm:ss"
"location.lat"		Numeric		Latitude
"location.long"		Numeric		Longitude
"height.above.msl"	Numeric		GPS Altitude
"ground.speed"		Numeric		NO DATA
"satellite.count"	Num (Integer)	Number of satellites
"hdop"			Numeric		Horizontal Dilution of Precision (lower values indicate higher accuracy)
"maximum.signal.strengt"Numeric		Satellite reception power

4. Missing data codes: NA

5. Specialized formats or other abbreviations used: NA
