ERDDAP > info > EUREC4A_ATOMIC_RonBrown_PMEL_Met_Nav_v1

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph			PMEL Atmospheric Chemistry ATOMIC MET_NAV 1 minute data		F   I   M	background			NOAA PMEL Atmosph...	EUREC4A_ATOMIC_RonBrown_PMEL_Met_Nav_v1

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	_NCProperties	String	version=2,netcdf=4.7.4,hdf5=1.10.6
attribute	NC_GLOBAL	cdm_data_type	String	Trajectory
attribute	NC_GLOBAL	cdm_trajectory_variables	String	trajectory_id
attribute	NC_GLOBAL	contributor_name	String	Coffman, Derek;Johnson, James;Quinn, Patricia;Bates, Tim;Upchurch, Lucia
attribute	NC_GLOBAL	Conventions	String	CF-1.6, COARDS, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	james.e.johnson at noaa.gov
attribute	NC_GLOBAL	creator_name	String	Johnson, James
attribute	NC_GLOBAL	creator_url	String	https://saga.pmel.noaa.gov
attribute	NC_GLOBAL	date_created	String	2020-11-30T17:21:45Z
attribute	NC_GLOBAL	Easternmost_Easting	double	-50.9246
attribute	NC_GLOBAL	featureType	String	Trajectory
attribute	NC_GLOBAL	geospatial_lat_max	double	15.8652
attribute	NC_GLOBAL	geospatial_lat_min	double	12.7865
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-50.9246
attribute	NC_GLOBAL	geospatial_lon_min	double	-59.6588
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	history	String	file created by NOAA/PMEL/ACG
attribute	NC_GLOBAL	infoUrl	String	https://saga.pmel.noaa.gov
attribute	NC_GLOBAL	institution	String	NOAA PMEL Atmospheric Chemistry
attribute	NC_GLOBAL	keywords	String	air, air_pressure, air_temp, air_temperature, atmosphere, atmospheric, atomic, baro_pressure, barometric, chemistry, component, course, data, diffuse, diffuse_downwelling_shortwave_flux_in_air, direction, downwelling, earth, Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements, Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure, Earth Science > Atmosphere > Atmospheric Pressure > Static Pressure, Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation, Earth Science > Atmosphere > Atmospheric Temperature > Air Temperature, Earth Science > Atmosphere > Atmospheric Temperature > Surface Air Temperature, Earth Science > Atmosphere > Atmospheric Water Vapor > Humidity, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Atmosphere > Precipitation > Precipitation Rate, Earth Science > Atmosphere > Precipitation > Rain, east, eastward, eastward_wind, environmental, flux, ground, heading, heat, heat flux, humidity, identifier, insolation, laboratory, latitude, level, longitude, marine, measurements, met, meteorology, minute, nav, noaa, north, northward, northward_wind, orientation, over, pacific, platform, platform_course, platform_orientation, platform_speed_wrt_ground, pmel, precipitation, pressure, radiation, rain, rain_rate, rainfall, rainfall_rate, rate, relative, relative_humidity, relative_wind_direction, relative_wind_speed, science, sea, seawater, ship, ship_course, ship_heading, ship_speed, shortwave, speed, static, surface, temperature, time, trajectory, trajectory_id, vapor, water, wind, wind_direction, wind_from_direction, wind_speed, wind_u, wind_v, winds, wrt
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute	NC_GLOBAL	Northernmost_Northing	double	15.8652
attribute	NC_GLOBAL	platform	String	RHBrown
attribute	NC_GLOBAL	product_version	String	1
attribute	NC_GLOBAL	project	String	ATOMIC
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	12.7865
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	trajectory_id
attribute	NC_GLOBAL	summary	String	ATOMIC (Atlantic Tradewind Ocean Atmosphere Mesoscale Interaction Campaign) 2020 Field campaign: Surface meteorological and ship navigation collected from the RV Ronald H. Brown by the National Oceanic and Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory (PMEL) Atmospheric Chemistry Group in the tropical North Atlantic ocean from 2020-01-09 to 2020-02-13
attribute	NC_GLOBAL	time_coverage_end	String	2020-02-11T23:59:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2020-01-07T18:00:00Z
attribute	NC_GLOBAL	title	String	PMEL Atmospheric Chemistry ATOMIC MET_NAV 1 minute data
attribute	NC_GLOBAL	Westernmost_Easting	double	-59.6588
attribute	NC_GLOBAL	Westernnmost_Easting	double	-59.6588
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.57842E9, 1.58146554E9
attribute	time	axis	String	T
attribute	time	calendar	String	gregorian
attribute	time	colorBarMaximum	double	1.582E9
attribute	time	colorBarMinimum	double	1.578E9
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	trajectory_id		String
attribute	trajectory_id	cf_role	String	trajectory_id
attribute	trajectory_id	ioos_category	String	Identifier
attribute	trajectory_id	long_name	String	trajectory id
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	-1.0E34
attribute	latitude	actual_range	double	12.7865, 15.8652
attribute	latitude	axis	String	Y
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	comment	String	In the one minute files the position is treated somewhat differently from all the other data. The position given is the ship's position at the start of the one minute 'averaging' period. All other data are a true average. The PMEL GPS was the primary source. The Ship's GPS was used when there were missing data in the PMEL record
attribute	latitude	epic_code	String	500
attribute	latitude	instrument	String	GPS
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
attribute	latitude	valid_max	double	90.0
attribute	latitude	valid_min	double	-90.0
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	-1.0E34
attribute	longitude	actual_range	double	-59.6588, -50.9246
attribute	longitude	axis	String	X
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	comment	String	In the one minute files the position is treated somewhat differently from all the other data. The position given is the ship's position at the start of the one minute 'averaging' period. All other data are a true average. The PMEL GPS was the primary source. The Ship's GPS was used when there were missing data in the PMEL record
attribute	longitude	epic_code	String	502
attribute	longitude	instrument	String	GPS
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
attribute	longitude	valid_max	double	180.0
attribute	longitude	valid_min	double	-180.0
variable	air_temp		double
attribute	air_temp	_FillValue	double	-1.0E34
attribute	air_temp	actual_range	double	22.0983, 29.0467
attribute	air_temp	colorBarMaximum	double	40.0
attribute	air_temp	colorBarMinimum	double	-10.0
attribute	air_temp	comment	String	One minute averages in degrees C. The following data sources were used. The PMEL Vaisala WXT536 and the PMEL Vaisala WXT520 sensor (both on the sampling aerosol mast at 17 m above sea level) and the NOAA PSD sensor on the bow foremast also at 17 meters above the sea surface. These 3 sensors generally agreed to better than 0.5 deg C. For this project the average of the two PMEL WXT sensors was used. During periods of missing data in the PMEL record the PSD sensor was used.
attribute	air_temp	epic_code	String	3051
attribute	air_temp	instrument	String	Vaisala WXT536(s/n:);Vaisala WXT520(s/n:)
attribute	air_temp	ioos_category	String	Temperature
attribute	air_temp	long_name	String	Air Temperature
attribute	air_temp	missing_value	double	-999.0
attribute	air_temp	source	String	surface observation
attribute	air_temp	standard_name	String	air_temperature
attribute	air_temp	units	String	degree_C
attribute	air_temp	valid_max	double	60.0
attribute	air_temp	valid_min	double	-50.0
variable	rh		double
attribute	rh	_FillValue	double	-1.0E34
attribute	rh	actual_range	double	44.8492, 84.2358
attribute	rh	colorBarMaximum	double	100.0
attribute	rh	colorBarMinimum	double	0.0
attribute	rh	comment	String	One minute averages in %. The following data sources were used. The PMEL Vaisala WXT536 and the PMEL Vaisala WXT520 sensor (both on the sampling aerosol mast at 17 m above sea level) and the NOAA PSD sensor on the bow foremast also at 17 meters above the sea surface. These 3 sensors generally agreed within 5% in rh. For this project the average of the two PMEL WXT sensors was used. During periods of missing data in the PMEL record the PSD sensor was used.
attribute	rh	epic_code	String	910
attribute	rh	instrument	String	Vaisala WXT536 (s/n:); Vaisala WXT520 (s/n:)
attribute	rh	ioos_category	String	Meteorology
attribute	rh	long_name	String	Relative Humidity
attribute	rh	missing_value	double	-999.0
attribute	rh	source	String	surface observation
attribute	rh	standard_name	String	relative_humidity
attribute	rh	units	String	percent
attribute	rh	valid_max	double	100.0
attribute	rh	valid_min	double	0.0
variable	rain_rate		double
attribute	rain_rate	_FillValue	double	-1.0E34
attribute	rain_rate	actual_range	double	0.0, 66.2212
attribute	rain_rate	colorBarMaximum	double	1.0E-4
attribute	rain_rate	colorBarMinimum	double	0.0
attribute	rain_rate	comment	String	The rain rate, in mm/hr, was measured by the PMEL-Vaisala WX520 and WX536 Met sensors located near the top of the aerosol sampling mast. The average of the two sensors was used. During periods of high wind speed (above about 15 m/s), sea spray causes drops that will impact the rain sensor and register as rain, thus there are periods where rain is recorded when there is no rain falling. We have no way of editing this out of the data record so the measured rain rate at these higher wind speeds is unreliable.
attribute	rain_rate	epic_code	String	962
attribute	rain_rate	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	rain_rate	ioos_category	String	Meteorology
attribute	rain_rate	long_name	String	Rain Rate
attribute	rain_rate	missing_value	double	-999.0
attribute	rain_rate	source	String	surface observation
attribute	rain_rate	standard_name	String	rainfall_rate
attribute	rain_rate	units	String	mm hour-1
attribute	rain_rate	valid_max	double	200.0
attribute	rain_rate	valid_min	double	0.0
variable	insolation		double
attribute	insolation	_FillValue	double	-1.0E34
attribute	insolation	actual_range	double	0.0, 1180.43
attribute	insolation	colorBarMaximum	double	10.0
attribute	insolation	colorBarMinimum	double	-10.0
attribute	insolation	comment	String	One minute averages in units of watts per square meter. Total solar radiation was measured with an Epply black and white pyranometer (horizontal surface receiver -180, model 8-48, serial number 12946) and an Epply precision pyranometer (horizontal surface receiver -180, twin hemispheres, model PSP, serial number 133035F3) that were mounted on the top of Areophys van. Both instruments were calibrated by the Epply Laboratory on October 11, 1994. There were times when the sampling mast shaded one or both sensors. There were also times when the ship's mast/bridge shaded the sensors. The shaded data have not been edited out of the 1 minute data record. The data reported here are from the model 8-48, serial number 12946 radiometer and are in watts per square meter and are the average value over the 1 minute sampling period.
attribute	insolation	epic_code	String	133
attribute	insolation	instrument	String	Epply black and white pyranometer (horizontal surface receiver -180, model 8-48, sn: 12946); Epply precision pyranometer (horizontal surface receiver -180, twin hemispheres, model PSP, sn: 133035F3)
attribute	insolation	ioos_category	String	Heat Flux
attribute	insolation	long_name	String	Shortwave Flux
attribute	insolation	missing_value	double	-999.0
attribute	insolation	source	String	surface observation
attribute	insolation	standard_name	String	diffuse_downwelling_shortwave_flux_in_air
attribute	insolation	units	String	W m-2
attribute	insolation	valid_max	double	1200.0
attribute	insolation	valid_min	double	0.0
variable	baro_pressure		double
attribute	baro_pressure	_FillValue	double	-1.0E34
attribute	baro_pressure	actual_range	double	1011.56, 1020.39
attribute	baro_pressure	colorBarMaximum	double	1050.0
attribute	baro_pressure	colorBarMinimum	double	950.0
attribute	baro_pressure	comment	String	One minute averages in units of mb. There were two sources of raw data, the PMEL WXT sensors (corrected to sea level) and the NOAA PSD sensor (corrected to sea level). For this project the average of the sea level corrected PMEL WXT sensors was used. Missing data were filled in with the PSD sea level corrected pressure.
attribute	baro_pressure	epic_code	String	915
attribute	baro_pressure	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	baro_pressure	ioos_category	String	Pressure
attribute	baro_pressure	long_name	String	Barometric Pressure
attribute	baro_pressure	missing_value	double	-999.0
attribute	baro_pressure	source	String	surface observation
attribute	baro_pressure	standard_name	String	air_pressure
attribute	baro_pressure	units	String	hPa
attribute	baro_pressure	valid_max	double	1100.0
attribute	baro_pressure	valid_min	double	600.0
variable	wind_speed		double
attribute	wind_speed	_FillValue	double	-1.0E34
attribute	wind_speed	actual_range	double	0.448341, 18.998
attribute	wind_speed	colorBarMaximum	double	15.0
attribute	wind_speed	colorBarMinimum	double	0.0
attribute	wind_speed	comment	String	The primary source for the true wind data was the average of the PMEL Vaisala WX520 and WX536 sonic anemometers, both located on the aerosol sampling mast, 17 m above sea level. For periods of missing data the average of the ship’s two WXT sensors, located above the ship’s navigation bridge, were used. True wind speed (wind_speed) and direction (wind_direction) were calculated from the relative wind taking into account the ship's motion from the GPS and the ship heading (ship_heading) from the GPS compass. The true wind vector is given as wind speed in m/s and wind direction in compass degrees (0 degrees meaning wind arriving from the north). The wind_u and wind_v are the east and north components of the wind vector in m/s. wind_u and wind_v are positive for wind going in the east and north directions..
attribute	wind_speed	epic_code	String	404
attribute	wind_speed	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	wind_speed	ioos_category	String	Wind
attribute	wind_speed	long_name	String	Wind Speed
attribute	wind_speed	missing_value	double	-999.0
attribute	wind_speed	source	String	surface observation
attribute	wind_speed	standard_name	String	wind_speed
attribute	wind_speed	units	String	m s-1
attribute	wind_speed	valid_max	double	60.0
attribute	wind_speed	valid_min	double	0.0
variable	wind_direction		double
attribute	wind_direction	_FillValue	double	-1.0E34
attribute	wind_direction	actual_range	double	5.5438, 288.918
attribute	wind_direction	colorBarMaximum	double	360.0
attribute	wind_direction	colorBarMinimum	double	0.0
attribute	wind_direction	comment	String	The primary source for the true wind data was the average of the PMEL Vaisala WX520 and WX536 sonic anemometers, both located on the aerosol sampling mast, 17 m above sea level. For periods of missing data the average of the ship’s two WXT sensors, located above the ship’s navigation bridge, were used. True wind speed (wind_speed) and direction (wind_direction) were calculated from the relative wind taking into account the ship's motion from the GPS and the ship heading (ship_heading) from the GPS compass. The true wind vector is given as wind speed in m/s and wind direction in compass degrees (0 degrees meaning wind arriving from the north). The wind_u and wind_v are the east and north components of the wind vector in m/s. wind_u and wind_v are positive for wind going in the east and north directions..
attribute	wind_direction	epic_code	String	412
attribute	wind_direction	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	wind_direction	ioos_category	String	Wind
attribute	wind_direction	long_name	String	Wind Direction
attribute	wind_direction	missing_value	double	-999.0
attribute	wind_direction	source	String	surface observation
attribute	wind_direction	standard_name	String	wind_from_direction
attribute	wind_direction	units	String	degree
attribute	wind_direction	valid_max	double	360.0
attribute	wind_direction	valid_min	double	0.0
variable	wind_u		double
attribute	wind_u	_FillValue	double	-1.0E34
attribute	wind_u	actual_range	double	-18.0162, 3.37084
attribute	wind_u	colorBarMaximum	double	15.0
attribute	wind_u	colorBarMinimum	double	-15.0
attribute	wind_u	comment	String	The primary source for the true wind data was the average of the PMEL Vaisala WX520 and WX536 sonic anemometers, both located on the aerosol sampling mast, 17 m above sea level. For periods of missing data the average of the ship’s two WXT sensors, located above the ship’s navigation bridge, were used. True wind speed (wind_speed) and direction (wind_direction) were calculated from the relative wind taking into account the ship's motion from the GPS and the ship heading (ship_heading) from the GPS compass. The true wind vector is given as wind speed in m/s and wind direction in compass degrees (0 degrees meaning wind arriving from the north). The wind_u and wind_v are the east and north components of the wind vector in m/s. wind_u and wind_v are positive for wind going in the east and north directions..
attribute	wind_u	epic_code	String	430
attribute	wind_u	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	wind_u	ioos_category	String	Wind
attribute	wind_u	long_name	String	east component of the wind
attribute	wind_u	missing_value	double	-999.0
attribute	wind_u	source	String	surface observation
attribute	wind_u	standard_name	String	eastward_wind
attribute	wind_u	units	String	m s-1
attribute	wind_u	valid_max	double	60.0
attribute	wind_u	valid_min	double	-60.0
variable	wind_v		double
attribute	wind_v	_FillValue	double	-1.0E34
attribute	wind_v	actual_range	double	-10.9351, 7.08239
attribute	wind_v	colorBarMaximum	double	15.0
attribute	wind_v	colorBarMinimum	double	-15.0
attribute	wind_v	comment	String	The primary source for the true wind data was the average of the PMEL Vaisala WX520 and WX536 sonic anemometers, both located on the aerosol sampling mast, 17 m above sea level. For periods of missing data the average of the ship’s two WXT sensors, located above the ship’s navigation bridge, were used. True wind speed (wind_speed) and direction (wind_direction) were calculated from the relative wind taking into account the ship's motion from the GPS and the ship heading (ship_heading) from the GPS compass. The true wind vector is given as wind speed in m/s and wind direction in compass degrees (0 degrees meaning wind arriving from the north). The wind_u and wind_v are the east and north components of the wind vector in m/s. wind_u and wind_v are positive for wind going in the east and north directions..
attribute	wind_v	epic_code	String	431
attribute	wind_v	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	wind_v	ioos_category	String	Wind
attribute	wind_v	long_name	String	north component of the wind
attribute	wind_v	missing_value	double	-999.0
attribute	wind_v	source	String	surface observation
attribute	wind_v	standard_name	String	northward_wind
attribute	wind_v	units	String	m s-1
attribute	wind_v	valid_max	double	60.0
attribute	wind_v	valid_min	double	-60.0
variable	ship_speed		double
attribute	ship_speed	_FillValue	double	-1.0E34
attribute	ship_speed	actual_range	double	0.0, 13.5512
attribute	ship_speed	colorBarMaximum	double	30.0
attribute	ship_speed	colorBarMinimum	double	0.0
attribute	ship_speed	comment	String	The ship_speed in knots (Speed Over Ground) and ship_course in compass degrees (Course Over Ground) are the one minute averages from the GPS (the PMEL GPS as the primary source, the Ship's GPS was the secondary source). To make the one minute averages the 1-second recorded motion vector was separated into east and north components that were averaged into one minute bins. The one minute components were then combined into the ship Velocity Vector. The ship_heading in compass degrees is the one minute average heading. The primary source was the PMEL GPS compass (Si-TEX Vector Pro), the ship gyro compass data were used when the primary data were missing. The 1-second data were separated into an east and north component before averaging and then recombined. NOTE: The ship_course is the direction the ship is moving. The ship_heading is the direction the ship's bow is pointing. When the ship is moving at 6 or more knots they generally are the same. Due to water currents, at slow speeds there can be quite a difference between the two. When the ship is stationary, the two are totally unrelated.
attribute	ship_speed	epic_code	String	3080
attribute	ship_speed	instrument	String	GPS compass (Si-TEX Vector Pro); ship gyro compass
attribute	ship_speed	ioos_category	String	Unknown
attribute	ship_speed	long_name	String	Ship Speed over Ground
attribute	ship_speed	missing_value	double	-999.0
attribute	ship_speed	source	String	surface observation
attribute	ship_speed	standard_name	String	platform_speed_wrt_ground
attribute	ship_speed	units	String	knots
attribute	ship_speed	valid_max	double	25.0
attribute	ship_speed	valid_min	double	0.0
variable	ship_course		double
attribute	ship_course	_FillValue	double	-1.0E34
attribute	ship_course	actual_range	double	0.0, 360.0
attribute	ship_course	colorBarMaximum	double	400.0
attribute	ship_course	colorBarMinimum	double	0.0
attribute	ship_course	comment	String	The ship_speed in knots (Speed Over Ground) and ship_course in compass degrees (Course Over Ground) are the one minute averages from the GPS (the PMEL GPS as the primary source, the Ship's GPS was the secondary source). To make the one minute averages the 1-second recorded motion vector was separated into east and north components that were averaged into one minute bins. The one minute components were then combined into the ship Velocity Vector. The ship_heading in compass degrees is the one minute average heading. The primary source was the PMEL GPS compass (Si-TEX Vector Pro), the ship gyro compass data were used when the primary data were missing. The 1-second data were separated into an east and north component before averaging and then recombined. NOTE: The ship_course is the direction the ship is moving. The ship_heading is the direction the ship's bow is pointing. When the ship is moving at 6 or more knots they generally are the same. Due to water currents, at slow speeds there can be quite a difference between the two. When the ship is stationary, the two are totally unrelated.
attribute	ship_course	epic_code	String	3070
attribute	ship_course	instrument	String	GPS compass (Si-TEX Vector Pro); ship gyro compass
attribute	ship_course	ioos_category	String	Unknown
attribute	ship_course	long_name	String	Ship Course over Ground
attribute	ship_course	missing_value	double	-999.0
attribute	ship_course	source	String	surface observation
attribute	ship_course	standard_name	String	platform_course
attribute	ship_course	units	String	degree
attribute	ship_course	valid_max	double	360.0
attribute	ship_course	valid_min	double	0.0
variable	ship_heading		double
attribute	ship_heading	_FillValue	double	-1.0E34
attribute	ship_heading	actual_range	double	0.00483233, 359.995
attribute	ship_heading	colorBarMaximum	double	400.0
attribute	ship_heading	colorBarMinimum	double	0.0
attribute	ship_heading	comment	String	The ship_speed in knots (Speed Over Ground) and ship_course in compass degrees (Course Over Ground) are the one minute averages from the GPS (the PMEL GPS as the primary source, the Ship's GPS was the secondary source). To make the one minute averages the 1-second recorded motion vector was separated into east and north components that were averaged into one minute bins. The one minute components were then combined into the ship Velocity Vector. The ship_heading in compass degrees is the one minute average heading. The primary source was the PMEL GPS compass (Si-TEX Vector Pro), the ship gyro compass data were used when the primary data were missing. The 1-second data were separated into an east and north component before averaging and then recombined. NOTE: The ship_course is the direction the ship is moving. The ship_heading is the direction the ship's bow is pointing. When the ship is moving at 6 or more knots they generally are the same. Due to water currents, at slow speeds there can be quite a difference between the two. When the ship is stationary, the two are totally unrelated.
attribute	ship_heading	epic_code	String	3061
attribute	ship_heading	instrument	String	GPS compass (Si-TEX Vector Pro); ship gyro compass
attribute	ship_heading	ioos_category	String	Unknown
attribute	ship_heading	long_name	String	Ship Heading
attribute	ship_heading	missing_value	double	-999.0
attribute	ship_heading	source	String	surface observation
attribute	ship_heading	standard_name	String	platform_orientation
attribute	ship_heading	units	String	degree
attribute	ship_heading	valid_max	double	360.0
attribute	ship_heading	valid_min	double	0.0
variable	relative_wind_speed		double
attribute	relative_wind_speed	_FillValue	double	-1.0E34
attribute	relative_wind_speed	actual_range	double	0.01138, 21.1417
attribute	relative_wind_speed	colorBarMaximum	double	15.0
attribute	relative_wind_speed	colorBarMinimum	double	0.0
attribute	relative_wind_speed	comment	String	The primary source for the relative wind data was the PMEL Vaisala WX520 and WX536 sonic anemometers, located on the aerosol sampling mast. For periods of missing data, the PSD Sonic anemometer on the ship’s foremast was used. The one second relative wind speed and direction data were separated into orthogonal components of "keel" and "beam". These components were averaged into 1 minute averages, and then recombined to relative wind vectors. Wind speed is reported in meters per second and wind direction is in degrees with -90 being wind approaching the ship on the port beam, 0 degrees being wind approaching the ship directly on the bow, and +90 degrees being wind approaching the ship on the starboard beam.
attribute	relative_wind_speed	epic_code	String	405
attribute	relative_wind_speed	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	relative_wind_speed	ioos_category	String	Wind
attribute	relative_wind_speed	long_name	String	Wind Speed Relative to Ship
attribute	relative_wind_speed	missing_value	double	-999.0
attribute	relative_wind_speed	source	String	surface observation
attribute	relative_wind_speed	standard_name	String	wind_speed
attribute	relative_wind_speed	units	String	m s-1
attribute	relative_wind_speed	valid_max	double	60.0
attribute	relative_wind_speed	valid_min	double	0.0
variable	relative_wind_direction		double
attribute	relative_wind_direction	_FillValue	double	-1.0E34
attribute	relative_wind_direction	actual_range	double	-179.98, 179.673
attribute	relative_wind_direction	colorBarMaximum	double	360.0
attribute	relative_wind_direction	colorBarMinimum	double	0.0
attribute	relative_wind_direction	comment	String	The primary source for the relative wind data was the PMEL Vaisala WX520 and WX536 sonic anemometers, located on the aerosol sampling mast. For periods of missing data, the PSD Sonic anemometer on the ship’s foremast was used. The one second relative wind speed and direction data were separated into orthogonal components of "keel" and "beam". These components were averaged into 1 minute averages, and then recombined to relative wind vectors. Wind speed is reported in meters per second and wind direction is in degrees with -90 being wind approaching the ship on the port beam, 0 degrees being wind approaching the ship directly on the bow, and +90 degrees being wind approaching the ship on the starboard beam.
attribute	relative_wind_direction	epic_code	String	414
attribute	relative_wind_direction	instrument	String	Vaisala WXT536 (sn:); Vaisala WXT520 (sn:)
attribute	relative_wind_direction	ioos_category	String	Wind
attribute	relative_wind_direction	long_name	String	Wind Direction Relative to Ship
attribute	relative_wind_direction	missing_value	double	-999.0
attribute	relative_wind_direction	source	String	surface observation
attribute	relative_wind_direction	standard_name	String	wind_from_direction
attribute	relative_wind_direction	units	String	degree
attribute	relative_wind_direction	valid_max	double	180.0
attribute	relative_wind_direction	valid_min	double	-180.0

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