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This alongtrack data set consists of individual .MET filed produced for each day of the NH1208 cruise, from 9 Aug. to 18 Sept. 2012. Data were obtained primarily by applying calibrations to raw data. However, several fields are derived measurements from more than a single raw input.
The New Horizon alongtrack data acquisition systems continuously log data from a suite of instruments throughout the cruise.
For information about events and known problems with acquisition, see the Cruise Data Report. (add link)
Cruises often used "-99.0" or "-99.0000" to indicate missing or bad data. Those numbers were changed to 'nd'. Not all bad data were flagged in this way however.
BCO-DMO Processing Notes and Edits: BCO-DMO obtained the data in ascii format and made the following edits: The '#' was removed from the header line. Values originally used to indicate null, unusued, or unknown values (i.e. "-99.0" or "-99.0000") were replaced with "nd". Several columns were omitted from display (BT, LF, HF, SH, SM, SR, ZO, ZS, ZT, XX, AX, IP, IV, IA) . "year", "month", "day" and "yrday" (all in GMT) were calculated and added to the display.
Measures air temperature
Module 1: RM Young model 85000
Module 2: RM Young model 85000
An anemometer is a device for measuring the velocity or the pressure of the wind. It is commonly used to measure wind speed. Aboard research vessels, it is often mounted with other meteorological instruments and sensors.
A barometer is an instrument used to measure atmospheric pressure. There are many types of barometers identified by make and model and method of measurement.
Model: PIR Serial: 27926F3 MFG: Eppley Labs
Location: Top Bridge 36'above MWL
CAL LAB: Eppley CAL DATE: 17-Dec-2008
The Eppley Precision Infrared Radiometer (PIR) pyrgeometer measures longwave (infrared) radiation. It is housed in a weatherproof titanium canister that has been painted with a very flat black paint that absorbs radiation. A small glass dome at the top of the instrument is covered with an 'interference coating' which allows only infrared radiation to come through. Light levels are detected as temperature changes creating voltages in fine wire coil detectors. more from Eppley Labs
Model: Enviro-T 2800-000-C Serial: 20049847 MFG: Turner Designs Location: AFT LAB-UCW line Owner: SIO/STS CAL LAB: Wetlabs CAL DATE: 09-Sep-2011
A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.
Model: GP90D Serial: ?? MFG: Furuno Location: Chart Room Owner: New Horizon
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.
Model: MK37 Serial: ?? MFG: Sperry Location: Bridge Owner: Ship CAL LAB: n/a CAL DATE: n/a
Compass with a motorized gyroscope that tracks true north (heading).
Model: 41382V Serial: 11255 MFG: Vaisala
Location: Top Bridge New Horizon 36'above MWL
Hygrometers are used for measuring relative humidity. This term is used when details of the make, model number and measurement principle are not known.
Model: 3260 Serial: K2K-07-0919 MFG: Knudsen Location: Main Lab Owner: SIO/STS
The Knudsen 320 B/R deepwater echosounder is a digital data logging system used to measure water depth (e.g. depth of the seafloor). The system is configured to work with different frequency transducers. For example, the Edo 323 B is a 12 kHz High Frequency (HF) transducer or it can be configured to work with an array of 3.5 kHz Low Frequency (LF) transducers mounted in the hull of a vessel.
MFG: Biospherial Instruments
Model: QSR-240P
CAL DATE: 18-Mar-2009
The LI-COR Biospherical PAR Sensor is used to measure Photosynthetically Available Radiation (PAR) in the water column. This instrument designation is used when specific make and model are not known.
Sensor: Precipitation. Model: 50202 Serial: 1301 MFG: RM Young; Location: Top Bridge 36'above MWL
MET station systems are designed to record meteorological information on board ships or mounted on moorings. These are commonly referred to as EMET (Electronic Meteorological Packages) or IMET (Improved Meteorological Packages) systems. These sensor packages record measurements of sea surface temperature and salinity, air temperature, wind speed and direction, barometric pressure, solar and long-wave radiation, humidity and precipitation.
Model: 50202 Serial: 1301 MFG: RM Young Location: Top Bridge 36'above MWL Owner: SIO/STS CAL LAB: SEG CAL DATE: 05-Jan-09 Install Date: 06-Jan-2009
measures rain or snow precipitation
Model: PSP
This radiometer measures sun and sky irradiance in the range of wavelengths 0.285 to 2.8 microns, including most of the solar spectrum. The PSP is intended to weight the energy flux in all wavelengths equally. It is a "hemispheric receiver" intended to approximate the cosine response for oblique rays. The Eppley Precision Spectral Pyranometer (PSP) is primarily used where high accuracy is required or where it is used to calibrate other pyranometers. The PSP outputs a low level voltage ranging from 0 to a maximum of about 12mV depending on sensor calibration and radiation level. An instruction manual provided by Eppley contains the sensor calibration constant and serial number. The Precision Spectral Pyranometer is a World Meteorological Organization First Class Radiometer and comes with a calibration certificate traceable to the World Radiation Reference and a temperature compensation curve. More information is available from Eppley Labs.
Model: SBE45 Serial: 0325 MFG: Seabird Location: Ocean Lab Owner: SIO/STS CAL LAB: Seabird CAL DATE: 19-Apr-2012
A thermosalinograph (TSG) is used to obtain a continuous record of sea surface temperature and salinity. On many research vessels the TSG is integrated into the ship's underway seawater sampling system and reported with the underway or alongtrack data.
Model: SEG14 Serial: 5125 MFG: SEG Location: Hull-2nd deck Machine rm Owner: SIO/STS CAL LAB: ODF CAL DATE: 17-Dec-2008
General term for an instrument that measures the temperature of the water with which it is in contact (thermometer).
relative wind speed on port side of bridge top
relative wind direction on port side of bridge top
true wind speed on port side of bridge top
true wind direction on port side of bridge top
relative wind speed on starboard side of bridge top
wind direction on starboard side of bridge top
true wind speed on starboard side of bridge top
true wind direction on starboard side of bridge top
air temperature
barometric pressure
barometric pressure 2
relative humidity
air temperature (RH module)
dew point
precipitation
long wave radiation dome temperature
long wave radiation body temperature
long wave radiation thermopile
long wave radiation
short wave radiation
surface Photosynthetically Available Radiation
sea surface temperature
Thermosalinograph temperature
Thermosalinograph conductivity
Thermosalinograph salinity
Thermosalinograph density
fluorescence (Wetlabs EnviroT)
flow meter
latitude
longitude
GPS Time of Day
ship's course (GPS COG)
ship's speed (GPS SOG)
GPS DateTime in seconds since 00:00:00 01/01/1970
GPS altitude above/below mean sealevel
GPS status/number of satellites.
ship's heading (gyrocompass)
Day, month, year (GMT time)with format yyyymmdd
day of month, 1 to 31. Values derived from the "date" field.
month of year
year of sampling
Jan. 1 = yrday 1. GMT day and decimal time, as 325.5 for the 325th day of the year, or November 22 at 1200 hours (noon). Values derived from the "date" field.
time GMT, 24 hour clock
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