Meteorological, oceanographic and ship data collected on board icebreaker Oden during the Petermann expedition 2015
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These data were collected onboard the icebreaker Oden during the Petermann expedition 2015 and are published by the Swedish Polar Research Secretariat. 
Obviously erroneous data have been omitted. No other processing of the data has been undertaken. Users should be aware of this in further data handling and analysis.
For further information on the specific research expedition see the metadata record or visit www.polarforskningsportalen.se.
For further information on the data, data collection, sensors, limitations or errors contact the data provider: datamanager@polar.se  
www.polar.se
Data are released on a Creative Commons by Attribution License 3.0 

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Files and  naming convention:
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Petermann.txt - Main file containing data as described below.
Petermann_overview.txt - File containing an hourly data excerpt from the full data file above.
Petermann_depth.txt  File contains water depth. (Different time resolution compared to main file)
Petermann_cloud.txt  Cloud height data as described below.
Transit/Petermann_transit.txt  Data from icebreaker Oden's transit to/from the Petermann starting point (mainly in non-polar waters).
Transit/Petermann_depth_transit.txt - File contains water depth during transit to/from Petermann starting point. (Different time resolution compared to main file)
Transit/Petermann_cloud_transit.txt - Cloud height data from transit to/from the Petermann starting point (mainly in non-polar waters).
GIS/Petermann.shp  Shape file of Petermann route
Petermann.kml  Google Earth file of Petermann route

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NULL indicates no reading or missing data.

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File content
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Petermann.txt, Petermann_overview.txt & Petermann_transit.txt
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Timestamp - Date and time for data collection in UTC0.
Long - () Longitude (ship position) in decimal degrees WGS84 from ship GPS.
Lat - () Longitude (ship position) in decimal degrees WGS84 from ship GPS.
Heading  () Ship heading from ship gyro.
COG  () ship course over ground from ship GPS.
SOG  (knots) Ship speed over ground from ship GPS.
Tempport  (C) Air temperature from sensor on port bow side of ship bridge. Vaisala HMP155.
Tempstbd  (C) Air temperature from sensor on starboard side of ship bridge. Vaisala HMP155.
Temperature - (C) Air temperature: lowest of Tempstbd and Temport.
Humport  (%) Relative humidity from sensor on port bow side of ship bridge. Vaisala HMP155.
Humstbd  (%) Relative humidity from sensor on starboard side of ship bridge. Vaisala HMP155.
Humidity - (%) Relative humidity: lowest of humstbd and humport.
WindDirTrue  () True wind direction (calculated).
WindSpeedTrue  (m/s) True wind speed (calculated).
WindDirRel  () Relative (as experienced on moving ship) wind direction. Measured at tower mounted on bridge roof.
WindSpeedRel  (m/s) Relative (as experienced on moving ship) wind speed (measured). Measured at tower mounted on bridge roof.
Pressure  (mbar) Atmospheric pressure at height of ships bridge.
Trend - (mbar/hour) Pressure trend over the last three hours.
PAR - (mol m^-2 s^-1) Photosynthetic Active Radiation (400-700nm). Biosphericalinstrument QSR21-50.
Tempsea - () Sea water temperature measured as temperature of the metal pipe at Odens sea water inlet using PT100 sensor.
Templab - () Temperature of sea water in laboratory onboard Oden (water has travelled in pipes from sea water inlet and consequently warmed - compare Tempsea).
Conductivitylab - (S/m) Conductivity of sea water from sea water intake in laboratory onboard Oden. Seabird SBE 38.
Salinitylab - (psu) Salinity of sea water from sea water intake in laboratory onboard Oden. Seabird SBE 38.
Soundvelocitylab - (m/s) Velocity of sound in sea water from sea water intake in laboratory onboard Oden. Seabird SBE 38.

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Petermann_depth.txt & Petermann_depth_transit.txt
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Timestamp  Date and time for data collection in UTC0.
Depth  (m) water depth from ship echo sounder.

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Petermann_cloud.txt & Petermann_cloud_transit.txt
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Instrument: CEILOMETER CBME80; Bjrn Eliasson Ingenjrsfirma AB

Timestamp - Date and time for data collection in UTC0.
CA1_B  (feet) Altitude of first cloud level. 
CA1_E  (feet) First cloud level amount in octaves. 9 = Instead of cloud  altitude, visibility is reported in CA1_B.
CA2_B  (feet) Altitude of second cloud level.
CA2_E  Corresponding to CA1_E.
CA3_B  (feet) Altitude of third cloud level.
CA3_E  Corresponding to CA1_E.
CA4_B  (feet) Altitude of forth cloud level.
CA4_E  Corresponding to CA1_E.




