Dataset: Underway Data - Filtered - AN10

Name: Filtered, hourly underway data from shipboard acquisition system from R/V Knorr KN197-08 in the Amazon River plume; NE coast of South America from May to June 2010 (ANACONDAS project)
Published: 2010-09-15
Keywords: oceans

Cite This Dataset

Spatial Extent: N:13.1021 E:-45.0046 S:4.34816 W:-59.6376

Project:

Amazon iNfluence on the Atlantic: CarbOn export from Nitrogen fixation by DiAtom Symbioses (ANACONDAS)

Program:

Integrated Marine Biogeochemistry and Ecosystem Research -US (IMBER-US)

Ocean Carbon and Biogeochemistry (OCB)

Emerging Topics in Biogeochemical Cycles (ETBC)

Marine Microbiology Initiative (MMI)

Principal Investigator:

Victoria Coles (University of Maryland Center for Environmental Science, UMCES/HPL)

Contact:

Victoria Coles (University of Maryland Center for Environmental Science, UMCES/HPL)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

15 September 2010

Version Date:

2010-09-15

Validated:

Current State:

Preliminary and in progress

Filtered, hourly underway data from shipboard acquisition system from R/V Knorr KN197-08 in the Amazon River plume; NE coast of South America from May to June 2010 (ANACONDAS project)

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Description

Filtered, hourly ship underway measurements from 3m depth

Methods & Sampling

Air temp; Port WXT520 (WXTP_Ta) Format: XXX.XX degrees C, Data obtained from
Vaisala WXT520 sensor mounted on the forward mast, port side, 20m above the waterline.

Barometric pressure (BPR), Primary barometric sensor reading (IMET_BPR),
BPR data has been corrected for 20.1 meter mast height ( .1185 millibars/m)

Decimal Latitude (Dec_Lat), Format: +/-xx.xxxx (S = "-"),
Latitude value in degrees obtained from the GPS NMEA $GPRMC data sentence.
The RMC sentence is obtained from the switched GPS receiver (C-Nav, GP1850, GP-90D).

Decimal Longitude (Dec_Lon), Format: +/-xxx.xxxx (W = "-"),
Longitude value in degrees obtained from the GPS NMEA $GPRMC data sentence.
The RMC sentence is obtained from the switched GPS receiver (C-Nav, GP1850, GP-90D).

Depth (12 kHz) ( Depth12), 12 kHz depth (meters) from sea surface obtained
by Knudsen bathymetry system. See Knudsen Bathymetry information for sound
speed and transducer depth corrections; normally based on 1500 m/s sound speed
& corrected for 5.95 meter (19.5 ft) transducer depth.

Fluorometer (FLR)

GPS course over ground (GPS_COG), Format: XXX.X degrees This is the primary COG data.
Course-over-ground (true) in degrees obtained from the GPS GPRMC data sentence.
The RMC sentence is obtained from the switched GPS receiver (C-Nav, GP1850, GP-90D).

GPS speed over ground (GPS_SOG) Format: XX.X knots. This is the primary SOG data.
Speed-over-ground (knots) obtained from GPS NMEA $GPRMC data sentence.
The RMC sentence is obtained from the switched GPS receiver (C-Nav, GP1850, GP-90D).

IMET Humidity (IMET_HRH) Format: XX.XX (%RH), XXX.XXX (C), IMET temperature and
humidity sensor. Humidity (HRH) and air temperature (Air_Temp) are obtained from
this instrument. Sensor is mounted on the forward mast, 20m above the waterline.

Salinity (Salinity) Format: ss.ssss (psu) Salinity calculated from SBE45 TMP
and SBE45 CND data values in accordance with UNESCO 44. (also see SBE45s)

Sea Surface Temperature (SSTMP) Format xx.xxxx (C) Sea surface temperature (degrees C)
from primary sensor (SBE48). This sensor is located in the bow chamber approximately 5m BWL
This value is used for related "conversion" calculations (i.e. Sound velocity).

True wind direction; Port WXT520 (WXTP_TD) - degrees Values are calculated from the
Vaisala WXT520 Weather Transmitter raw data corrected for sensor alignment error and
combined with the ship's gyro heading and GPS SOG and COG values. Sensor is mounted
on the bow mast, port side, at a height of 20m above the waterline.

True wind speed; Stbd WXT520 (WXTS_TD) - m/sec Values are calculated from the
Vaisala WXT520 Weather Transmitter raw data corrected for sensor alignment error and
combined with the ship's gyro heading and GPS SOG and COG values. Sensor is mounted
on the bow mast, stbd side, at a height of 20m above the waterline.

Data Processing Description

As reported:
Missing data are indicated with NaN for the filtered dataset and -999 for the unfiltered dataset.
Note: Changed to BCO-DMO standard of "nd" in both datasets

Filtering is boxcar with a filterwidth of .041666 days = 1 hour

BCO-DMO Processing Notes
Generated from original text file "filter-1hr-underway-sail.dat" contributed by Victoria Coles

BCO-DMO Edits
- Parameter names modified to conform to BCO-DMO convention
- "date" parameter added (needed with yrday)
- decimal data values padded to consistent decimal places as reported
- "NaN" no data flag changed to "nd"

Data Files

File
UW_Filt.csv (Comma Separated Values (.csv), 99.01 KB) MD5:d11a7babb7d2dff8d707b2885b95a0c1 Primary data file for dataset ID 3368

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0934095
Gordon and Betty Moore Foundation: Marine Microbiology Initiative	GBMF2293

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
KN197-08	AN10 ANACONDAS ROCA	2010-05-22	R/V Knorr	Patricia L. Yager (Chief Scientist)	data info

Instruments

Global Positioning System Receiver

Supplied Description:

Instrument Type

Generic Name: Global Positioning System Receiver

Acronym: GPS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/POS03/

Generic Description:

The Global Positioning System (GPS) is a U.S. space-based radionavigation system that provides reliable positioning, navigation, and timing services to civilian users on a continuous worldwide basis. The U.S. Air Force develops, maintains, and operates the space and control segments of the NAVSTAR GPS transmitter system. Ships use a variety of receivers (e.g. Trimble and Ashtech) to interpret the GPS signal and determine accurate latitude and longitude.

Improved Meteorological Recorder

Supplied Description:

Instrument Type

Generic Name: Improved Meteorological Recorder

Acronym: IMET

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/102/

Generic Description:

An IMET Recorder is an instrument package that can be mounted on a ship or buoy to record mean weather data including air and sea-surface temperature, incoming short and long-wave radiation, precipitation, humidity, wind velocity and barometric pressure. Each sensor in the system communicates digitally and returns calibrated values to a central data recorder.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
yrday_gmt	Day of year (GMT)	decimal days	yrday_gmt
lon	Decimal Longitude (Dec_Lon); Format: +/-xxx.xxxx (W = "-"); Longitude value in degrees obtained from the GPS NMEA $GPRMC data sentence.The RMC sentence is obtained from the switched GPS receiver (C-Nav; GP1850; GP-90D).	decimal degrees	lon
lat	Decimal Latitude (Dec_Lat); Format: +/-xx.xxxx (S = "-"); Latitude value in degrees obtained from the GPS NMEA $GPRMC data sentence. The RMC sentence is obtained from the switched GPS receiver (C-Nav; GP1850; GP-90D).	decimal degrees	lat
depth_w	Depth (12 kHz) ( Depth12); 12 kHz water depth (meters) from sea surface obtained by Knudsen bathymetry system. See Knudsen Bathymetry information for sound speed and transducer depth corrections; normally based on 1500 m/s sound speed & corrected for 5.95 meter (19.5 ft) transducer depth.	meters	depth_w
Air_Temperature	Air temp; Port WXT520 (WXTP_Ta) Format: XXX.XX degrees C; Data obtained from Vaisala WXT520 sensor mounted on the forward mast; port side; 20m above the waterline.	degrees Celsius	temp_air
Barometric_Pressure	Barometric pressure (BPR); Primary barometric sensor reading (IMET_BPR); BPR data has been corrected for 20.1 meter mast height ( .1185 millibars/m)	millibars	press_bar
Fluorescence	Fluorometer (FLR)	mgm-3	fluor
Course_over_ground	GPS course over ground (GPS_COG); Format: XXX.X degrees This is the primary COG data. Course-over-ground (true) in degrees obtained from the GPS GPRMC data sentence. The RMC sentence is obtained from the switched GPS receiver (C-Nav; GP1850; GP-90D).	degrees	cog
Speed_over_ground	GPS speed over ground (GPS_SOG) Format: XX.X knots. This is the primary SOG data. Speed-over-ground (knots) obtained from GPS NMEA $GPRMC data sentence. The RMC sentence is obtained from the switched GPS receiver (C-Nav; GP1850; GP-90D).	knots	sog
Relative_Humidity	IMET Humidity (IMET_HRH) Format: XX.XX (%RH); XXX.XXX (C); IMET temperature and humidity sensor. Humidity (HRH) and air temperature (Air_Temp) are obtained from this instrument. Sensor is mounted on the forward mast; 20m above the waterline.	percentage	humidity
Salinity	Salinity (Salinity) Format: ss.ssss (psu) Salinity calculated from SBE45 TMP and SBE45 CND data values in accordance with UNESCO 44. (also see SBE45s)	psu	sal
Water_Temperature	Sea Surface Temperature (SSTMP) Format xx.xxxx (C) Sea surface temperature (degrees C) from primary sensor (SBE48). This sensor is located in the bow chamber approximately 5m BWL This value is used for related "conversion" calculations (i.e. Sound velocity).	degrees Celsius	SST
Short_Wave_Radiation	Short Wave Radiation	W/m^2	radiation_s
Sound_Velocity	Sound Velocity	m/sec	sound_vel
True_Wind_Direction	True wind direction; Port WXT520 (WXTP_TD) - degrees Values are calculated from the Vaisala WXT520 Weather Transmitter raw data corrected for sensor alignment error and combined with the ship's gyro heading and GPS SOG and COG values. Sensor is mounted on the bow mast; port side; at a height of 20m above the waterline.	degrees	wind_dir
True_Wind_Speed	True wind speed; Port WXT520 (WXTP_TD) - m/sec Values are calculated from the Vaisala WXT520 Weather Transmitter raw data corrected for sensor alignment error and combined with the ship's gyro heading and GPS SOG and COG values. Sensor is mounted on the bow mast; port side; at a height of 20m above the waterline.	m/sec	wind_speed
date	Date (GMT)	YYYYMMDD	date

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Dataset: Underway Data - Filtered - AN10