LMG02_03 Cruise Data Report April 7 - May 20, 2002 Table of Contents INTRODUCTION 1 ARCHIVE DATA EXTRACTION 2 CD DIRECTORY STRUCTURE 3 DISTRIBUTION CONTENTS 4 ADCP 4 AUTOMATED WEATHER STATION 4 CALIBRATION 4 CTD 4 CTD/Graphs/ 4 CTD/Raw/ 4 CTD/Process/ 5 CTD/Setup/ 5 CTD/Chloro.tar 5 MOCNESS 6 1-meter and 10-meter 6 Optical Plankton Counter 8 CRUISE TRACK 8 ISOBAR CHARTS 8 ICE IMAGES 8 NUTRIENTS, OXYGEN, AND SALINITY FROM ROSETTE BOTTLE SAMPLES 9 DATA AND SCIENCE REPORT 10 QC PLOTS 10 SEAL DATA 10 WHALE DATA 10 SITREPS 11 XCTD 11 JGOFS DATA SET 11 RVDAS 12 Meteorological and Light Data 12 Navigational Data 12 Geophysical Data 12 Oceanographic Data 12 DATA FILE NAMES AND STRUCTURES 13 lknu 13 lmet 14 svp1 14 ltsg 14 ladc 15 lash 15 GGA: GPS Position Fix - Geoid/Ellipsoid 15 lgyr 15 HDT: True Heading 16 ROT: Rate of Turn 16 tgps 16 GLL: Geographic Position - Latitiude/Logitude 17 VTG: Track Made Good and Speed over Ground 17 VHW: Speed Through Water and Heading 17 ZDA: Time and Date 17 BWC: Bearing and Distance to Waypoint 18 lpcd 18 GGA: GPS Position Fix - Geoid/Ellipsoid 18 GLL: GPS Latitude/Longitude 18 VTG: GPS Track and Ground Speed 19 LMG02_03 SENSORS 20 SHIPBOARD SENSORS 20 MOCNESS SENSORS: 20 CTD SENSORS: 20 ACQUISITION PROBLEMS AND EVENTS 21 Introduction The LMG data acquisition systems continuously log data from a suite of instrumentation throughout the cruise. This document describes the format of that data and its location on the distribution CDs. It also contains important information which may affect how this data is processed such as instrument failures or other known problems with acquisition. The data collected during this cruise is distributed on a CD-ROM written in ISO9660 level-1 format. This data format has very strict requirements on filenames and organization. However, it is readable by virtually every computing platform. All of the data has been archive with the Unix "tar" command, then compressed using Unix "gzip" compression. Tar files have the ".tar" extension and Gzipped files have a ".gz" extension. Tools are available on all platforms for uncompressing and de-archiving these formats. On Macintosh, Stuffit Expander with DropStuff will open a tar archive and uncompress gzipped and Unix compressed files. For Windows9X, WinZip, a shareware utility included on this CD (remember, it is shareware) will open these files. IMPORTANT: Read the last section in this document, Acquisition Problems and Events, for important information that may affect the processing of this data. Archive Data Extraction It is often useful to know exactly how an archive was produced when expanding its contents. Tar files were created using the following commands: tar cvf archive-file files-to-be-archived To create a list of the files in the archive: tar tvf archive-file > contents.list To extract the files from the archive: tar xvf archive-file file(s)-to-extract G-zipped files will have a ".gz" extension on the filename. These files can be decompressed after de-archiving, using: gunzip filename.gz CD Directory Structure DISK1 ADCP/ Pingdata AWS/AWS8930.gz AWS8932.gz Cal/CTDCals.tar Moc1Cals.tar Moc10Cal.tar Ctd/ Graphs/Graphs.gz Process/Bottle.gz Cast.gz DownCast.gz RosFiles.gz UpCast.gz Raw/Raw.gz Setup/*.con *.dsp *.cfg Process.bat Ss4242d1.exe SS4242d2.exe Imagery/ Isobars/*.gif Ice/Ice.tar JGOF/lmgjgof.tar Map/*.jpg *.ps Mocness/DrakeOPC.g Moc1.gz Moc10.gz OPC.gz Nutrient/rosette.tar QC_Plots/ Report/report.doc report.html report.txt CD-Labels/*.jwl *.jpg Rvdas/lmguw.tar Seals/seals.tar Sitreps/sitrep.tar Utilities/ Winzip Stuffit Expander Mac Whales/sightings.xls XCTD/XCTD.gz DISK 2 Rvdas/lmgnav.tar Distribution Contents ADCP Adcp/ The ADCP data set is broken up into files representing 24 hours of data collection. The files are named pingdata.xxx (xxx representing a day number). Note that these extensions do NOT represent Julian day numbers. Please refer to the file's creation date. Some ADCP data is also transmitted to RVDAS. East and North vectors for ship's speed relative to the reference layer and ship's heading are archived in the navigational data section of RVDAS. Automated Weather Station AWS/ The Automated Weather Station data was emailed to us twice a day from University of Wisconsin-Madison. The are two different weather stations with the argos ids of 8930 and 8932. The AWS8930.gz and AWS8932.gz files are compressed archives which contain text files containing the data sent to the ship. Calibration Cal/ The tar files in the Cal directory contain images of calibration sheets for each of the following systems: CTD, 1m-MOCNESS, 10m-MOCNESS, Sound Velocity Probe, and Underway System Refer to the instrument.coeff file (in coeff.tar) for information on how the JGOFS dataset was processed. CTD CTD/Graphs/ The Graphs.gz file is a compressed archive that contains post-script graphs for each CTD cast. For each Cast there are three graph files Light.LMG0203.##.ps, TempSal.LMG0203.##.ps, and Oxy.LMG0203.##.ps, where ## represents the cast number. The Light.LMG0203.##.ps is a graph of the voltages of the following sensors: PAR, Transmissometer, CDOM Transmissometer, and Fluorometer. The TempSal.LMG0203.##.ps is a graph of Temperature and Salinity for both the primary and secondary sensors. The Oxy.LMG0203.##.ps is a graph of Oxygen Temp., Primary Temp., Oxygen Percent Sat., and Oxygen mL/L. CTD/Raw/ All CTD data acquired on the cruise can be found in the Raw.gz archive within the CTD/Raw/ directory. The data for each station consists of four files. The filename convention is as follows: G0203##.EEE, where G is for the Gould, 0203 is the Cruise # , ## is the cast number, and EEE is the extension. Which will be one of the four type listed below. .dat Actual cast data in SeaBird format. .bl Information pertaining to the water sampling bottles for each cast. .hdr ASCII "header" containing user specific information for each cast. .con Instrument configuration file used for the cast. CTD/Process/ The Data collected was post-processed using seasoft standard processing. There are 6 different file produced during the post-processing. They are as follows: .cnv 'Converted' engineering unit data file .ros Scans marked with the bottle fire confirmation bit .btl A summary of the data in the .ros file .con A copy of the original .con file used during the cast .asc The data portion of the .cnv converted data file written in ascii .hdr Header file The cast was split into the down and up cast. The downcast are archived in the DownCast.gz file, and the upcast in the UpCast.gz file. The Bottle.gz archive contain the .btl files for each cast. The RosFiles.gz contains the .ros file for each cast. Finally the Cast.gz archive contains the .cnv and .con files for whole cast both up and down. CTD/Setup/ This directory contains the all the files used to collect and process the CTD data. It contains the following: Seasoft Version 4.242 (SS4242d1.exe, SS4242d2.exe) Process.bat the processing batch file use to post-process the data. *.con Instrument configuration file used for the cast *.dsp The display files used. *.cfg The configuration file used by the post-processing software CTD/Chloro.tar Excel spreadsheet of chlorophyll data for each cast where water samples were taken. For more information and updated software visit the web site at www.seabird.com. MOCNESS Mocness/ 1-meter and 10-meter The MOCNESS data resides in the MOC1.gz and MOC10.gz archive for the 1-meter and 10-meter respectively. The data set from each cast is made up of three files. The filenames consist of the station number and an extension: .pro .raw or .tab. The type of data in each file is listed below. .pro processed data in space delimited tabular format .raw raw cast data in ASCII text format .tab statistical summary in space-delimited tabular format Processed filename *.pro This file contains the processed data for each tow, written in ASCII to disk in a simple configuration, which consists of: Rows 1-5 header information about sensors and the tow Row 6 the column headings (discussed below): time pres echo temp theta sal sigma angle flow hzvel vtvel vol net fluor ptran oxycurrent oxytemp oxygen lat lon Succeeding rows data for each column heading with each value separated by 2 spaces. time Julian day, hours and minutes expressed as decimal pres depth (m) temp temperature degrees C theta potential temperature, formulae from Fofonoff and Millard 1983 sal salinity ppt sigma potential density, formulae from Fofonoff and Millard 1983 angle angle 0-90 flow flow counts 0000-9999 hzvel horizontal velocity (knots) vtvel vertical velocity (m/min) vol seawater volume filtered (m3) net net number fluor fluorescence (0-5 volts) ptran extinction coefficient (0-5 volts) oxycurrent 0-5 volts oxytemp 0-5 volts internal to the probe oxygen dissolved oxygen (ml/l) lat latitude decimal degrees lon longitude decimal degrees Raw filename *.raw This file contains the raw data from the underwater unit. These "*.raw" files can be used in the playback mode to re-process the data (see page 33 MOCNESS instructions), and also serve as the backup in case there are problems with the processed data file. For each tow, data is written (as it appears in the acquisition window) in ASCII to disk in a simple configuration, which consists of: Rows 1-5 header information about sensors and the tow Succeeding rows raw data string formatted thusly: #MN- N1 N2 AA FFFF PPPPP PTPT TTTTTT CCCCCC BBB $GPGLL The fields are as follows and are discussed individually below. N1 net count, counts of left response switch, 00-99 N2 net count, counts of right response switch, 00-99 AA net angle in degrees, 00-99 FFFF flow counts, 0000-9999. Reset to 0000 with every net response or increment net # button command PPPPP pressure value, converted to decibars by the deck computer PTPT a decimal number derived from the temperature sensor in the pressure sensor which is used to improve the pressure calibration TTTTTT averaged SeaBird temperature period. The frequency from the SeaBird temperature sensor is measured and processed in the NCU to generate the value TTTTTT, a 6-digit decimal number. This number is scaled as follows: (frequency of the temp. sensor)=K/(TTTTTT) where K=1,258,291,200. Software in the deck computer uses this frequency value along with the individual sensor's calibration file to calculate temperature. CCCCCC averaged SeaBird conductivity period, handled exactly like the temperature frequency and the same scaling factor should be used BBB battery voltage (divide value by 10) $GPGLL latitude and longitude in decimal degrees Tab filename *.tab The statistical summary for a given *.pro file. For each net, the following parameters are included: pmin,pmax,pavg minimum, maximum and average depth of net tmin,tmax,tavg minimum, maximum and average temperature of net smin,smax,savg minimum, maximum and average salinity of net amin,amax,aavg minimum, maximum and average angle of net spmin,spmax,spavg minimum, maximum and average horizontal velocity (kt) of net armin,armax,aravg minimum, maximum and average vertical velocity (m/sec) of net #obs total number of observations while net was open vol total seawater volume filtered for net Captured screens, filenames *.bmp This file is bitmap image of the acquisition software captured at any point during a MOCNESS "flight". The files on this CD reflect the acquisition window at the end of each "flight", immediately prior to ending acquisition. Optical Plankton Counter The OPC was tow along with eh 1-meter MOCNESS. The data collected from these tows are in the OPC.gz archive. Connected to the OPC during these tows was the CDOM Fluorometer, and a flow meter. The CDOM Fluorometer was connected to the Underway System for the southbound Drake crossing, and the OPC was to collect that data, this data is archived the DrakeOPC.gz file. Cruise Track Map/ PostScript and JPG cruise track plots have been produced for this cruise. Isobar Charts Imagery/Isobars/ Analysis of mean sea level pressure from the National Center for Environmental Prediction's Medium Range Forecast Model. Updated every 12 hours. Ice Images Imagery/Ice Palmer Station sent Ice satellite images for the cruise area as .jpg files from their TerraScan system. Nutrients, Oxygen, and Salinity from Rosette Bottle Samples Nutrient/Rosette.tar All data is organized in folders under the main file. Four folders are contained within the main directory: processed data (Profile Data), the raw data files for each of the analyses (Oxygen and Nutrient) and a file containing all salinity data. A test cast of the CTD rosette was conducted on April 13, 2002 just south of Anvers Island (65' 11.22, 64' 15.56) in 280 meters of water depth. All bottles were closed near the surface and the rosette was lowered to 100 meters where it stayed for approximately five minutes. Results of nutrient and oxygen analysis for all bottles are located in the rosette test file in the profile data. Bottles 1, 2 and 22 were suspected initially from oxygen analysis but only bottle 22 was confirmed to be leaking from the nutrient data. This bottle was not used for water column acquisition intended for sample analysis. Nutrients and oxygen (Winkler titrations) determinations from water samples taken from casts during the GLOBEC III cruise (LMG0203) are organized into folders under the profile data directory and are labeled by event numbers and cast numbers. Each folder contains: -One Excel spreadsheet (LMG0203Nutevntxxx.xls) listing nutrient concentrations (Nitrate, Nitrite, Phosphate, Ammonium. Silicate) corresponding to depth of sample and Niskin bottle number and station information (e.g. event number and cast number, location, time of cast, depth of cast and total depth, date and operator). - One excel spreadsheet (LMG0203Oxyevntxxx.xls) listing oxygen concentrations (Winkler titration) corresponding to depths and bottle sampled along with station information (e.g. event number and cast number, location, time of cast, depth of cast and total depth, date and operator). - One Excel spreadsheet containing bottle data collected from CTD sensors at the depths where Niskin bottles were closed. This file contains sensor data including salinity, oxygen concentration, and temperature and derivative parameters from these measurements (sigma theta). -Two graphics files (jpeg format) of nutrients and oxygen determinations compared to depth of sample -One text file (eventxxx.txt) of nutrient and oxygen data in the following format listing columns in order from left to right: Entry #, Depth (m), Sample #, Nitrate, Nitrite, Phosphate, Ammonium, Silicate, Oxygen depth (m), Oxygen (ml/L) - One text file (eventxxxwsens.txt) of nutrient and oxygen data followed by bottle CTD data added on in the following format: Entry #, Depth (m), Sample #, Nitrate, Nitrite, Phosphate, Ammonium, Silicate, Oxygen depth (m), Oxygen (ml/L), Bottle #, Salinity (PSU), Sensor Oxygen (ml/L), Potential Temperature (oC), Sigma Theta, Sensor depth (m). The bottle sensor files given above were matched with casts where water samples were taken from the rosette. Water samples were not taken on all casts, so CTD sensor data for some casts is not contained in these folders. Bottle data for all casts is located in the folder labeled "CTDbottlesensor". Raw data files for the calculations generating the above presented data are located in the folders labeled "Nutrients", "Oxygen" and "Salinity". All oxygen calculations, standards and peripheral information (i.e. Bottle volumes) are contained in an excel workbook labeled "O2calculationsLMG0203.xls" under the oxygen folder. The manual for analysis and standardization of the system is also contained in the "Oxygen analysis" file. Prior to each series of analysis the titrator was standardized with a solution of KIO3 (standard solution concentrations are listed in the calculation workbook). Standards were titrated until agreement reached + 2 ?L. A reagent blank determination was conducted at the start of the cruise and used throughout. Titrations performed on the Langford Amperometric system were logged during operation and the titration data is located in the raw data file under the folder "Oxygen analysis" and labeled according to the date the samples were run. Nutrient determinations were conducted on an Alpkem Flow Solutions segmented flow autoanalyzer. Operation and standardization of the system is described in detail in the Flow Solutions manual under the file "Alpkem manuals". Linearity checks were conducted at the beginning of the cruise for each of the ions and conducted at the start and completion of each sample sequence. Analysis integrity was also checked by sampling surface and bottom water bottles in duplicate. This process was repeated on most casts. The nutrient folder contains the raw data output by the Alpkem Flow Solutions system in a folder labeled Alpkem output. These files were exported to spreadsheet format and saved as excel files under the folder "Nutrient Spreadsheets". Corresponding ion concentrations for each depth were transferred to the profile data sheets. Salinity determinations were conducted on a Guildline model 8410 Portable Salinometer (PortaSal). Standardization was conducted using Copenhagen water prior to each series of determination and relevant information is entered in the spreadsheets. The nutrient and oxygen determinations were checked superficially by plotting the results against the CTD sensor parameters Sigma Theta, Potential Temperature and Oxygen. The results of these comparisons can be accessed and viewed under the file "Property plots". In addition the Winkler oxygen titrations were compared to the CTD oxygen sensor and a least squared regression resulted in the relationship: Y = 0.9298*X + 0.6162. Where the Winkler titrations are located on the independent axis and CTD sensor output is on the dependent. Scatter is observed in the relationship and a concentration of determinations appears at the lower and upper range of the data. Variation could be due to equivalence time associated with the temperature sensor on the oxygen sensor. Significant scatter was also observed in the nutrient determinations when compared to each of the CTD sensor parameters. The scatter appears to be specifically associated with surface waters and more tightly aggregated data is observed in the deeper waters associated with lower oxygen concentrations and warmer temperatures Data and Science Report Report/ Copies of this report in MS Word, HTML, and text formats. Also an Excel format spreadsheet of all logged events is included. QC PLOTS Postscript files of data stored each day on RVDAS for quality control analysis during the cruise. The are 3 types; metXXX.ps, navXXX.ps, and oceanXXX.ps where XXX is the julian date. Met files are a summary of the meteorological instruments, Nav files are a summary of navigational data, and Ocean files are a summary of underway seawater and bathymetry data. Seal Data Seals/seals.tar Data reports of preliminary seal satellite tag information and physiological data. Whale Data Whales/sightings.xls Excel spreadsheet of whale sightings. Sitreps Sitreps/sitrep.tar Daily situation reports filed by the Marine Projects Coordinator in html format. XCTD XCTD/ Expendable CTD probes were used at selected points to obtain water column temperature and salinity profiles. The data files from these launches are included here. JGOFS Data Set JGOF/ The JGOFS data set consists of a single file produced each day named jg.dat.gz where is the day the data was acquired. The ".gz" extension indicates that the individual files are compressed before archiving. The daily file consists of 22 separate columnar fields in text format, which are described below. The JGOFS data set is obtained primarily by applying calibrations to raw data and decimating to whole minute intervals. However, several fields are derived measurements from more than a single raw input. Note: Null, unused, or unknown fields are filled with 9's in the JGOFS data. Additionally, 3 separate QC plots are generated daily by the ET using the JGOFS data set. These plots include TSG and Bathymetry data, meteorological data, and navigation data. The files are called ocean.ps, met.ps, and nav.ps respectively. Field Data Units 01 GMT date dd/mm/yy 02 GMT time hh:mm:ss 03 PCOD latitude (negative is South) Ddd.dddd 04 PCOD longitude (negative is West) Ddd.dddd 05 Ships speed Knots 06 GPS HDOP - 07 Gyro Heading Degrees (azimuth) 08 Course over ground Degrees (azimuth) 09 Mast PAR ?Einsteins/meters2 sec 10 Sea surface temperature (C 11 Not used - 12 Sea surface salinity PSU 13 Sea depth (uncorrected, calc. sw sound vel. 1500 m/s) meters 14 True wind speed (port windbird) meters/sec 15 True wind direction (port windbird) degrees (azimuth) 16 Ambient air temperature (C 17 Relative humidity % 18 Barometric pressure mBars 19 Sea surface fluorometry volts (0-5 FSO) 20 Not used - 21 PSP W/m2 22 PIR W/m2 RVDAS rvdas/ RVDAS (Research Vessel Data Acquisition System) was developed at Lamont-Doherty Earth Observatory of Columbia University and has been used on the R/V Maurice Ewing for several years. It was adapted for use on the Nathaniel B. Palmer and her sister ship, the R/V Laurence M. Gould. Below you will find detailed information on the data included. Be sure to read the "Significant Acquisition Events" section below for important information about data acquisition during this cruise. Meteorological and Light Data Measurement File ID Collect. Status Rate Instrument Air Temperature lmet continuous 1 sec R. M. young 41372VC Relative Humidity lmet continuous 1 sec R. M. young 41372VC Wind Speed/Direction lmet continuous 1 sec R. M. young 5106 PIR (LW radiation) lmet continuous 1 sec Eppley PIR PSP (SW radiation) lmet continuous 1 sec Eppley PSP Photosynthetically- Available Radiation lmet continuous 1 sec BSI QSR-240 Barometer lmet continuous 1 sec R. M. young 61201 Navigational Data Measurement File ID Collect. Status Rate Instrument Attitude GPS lash continuous 1 sec Ashtec ADU-2 P-Code GPS lpcd continuous 1 sec Trimble 20636-00SM Gyro lgyr continuous 0.2 sec Yokohama Gyro Trimble GPS tgps continuous 1 sec NT200 Geophysical Data Measurement File ID Collect. Status Rate Instrument Bathymetry lknu variable Varies Knudsen 320B/R Oceanographic Data Measurement File ID Collect. Status Rate Instrument Salinity ltsg continuous 15 sec SeaBird 21 Sea S Temperature ltsg continuous 15 sec SeaBird 3-01/S Fluorometry (analog) ltsg continuous 15 sec Turner 10-AU-005 ADCP ladc continuous 1 sec RD Instruments Data File Names and Structures RVDAS data is divided into two broad categories, Underway and Navigation. The groups are abbreviated "uw" and "nav". Thus, these two tar files, lmguw.tar and lmgnav.tar exist under the top-level rvdas directory. The instruments are broken down as shown. Each data file is g-zipped to save space on the distribution. Not all data types are collected everyday or on every cruise. RVDAS data files are named following the convention: LMG[FileID].dDDD. * The FileID is a 4-character code representing the system being logged, for example: lmet (for meteorology) * DDD is the Julian day of the data collection Underway Data File ID Navigation Data File ID Meteorolical lmet Gyro Compass lgyr Knudsen lknu P-CODE GPS lpcd Thermosalinograph ltsg Ashtech ADU2 GPS lash ADCP ladc Trimble NT2100 GPS tgps Sound Velocity Probe lsvp Data is received by the RVDAS system via RS-232 serial connections. The data files that comprise the rvdas data set are described below. A time tag is added to each line of data received and the data is written to disk. YY+DDD:HH:MM:SS.SSS [data stream from instrument] Where, YY: two-digit year, DDD: Julian Day, HH: 2 digit hours, MM: 2 digit minutes SS.SSS: seconds. All times are UTC. The delimiters used to separate fields in the raw data files are usually spaces and commas, but other delimiters are used (::, =, @) and occasionally there is no delimiter. Care should be taken when reprocessing the data that the fields separations are clearly understood. An example data lknu 99+099:00:18:19.775 hf,305.2,lf,304.3 Field Data Units 1 RVDAS Time Tag 2 hf - high frequency flag (12 kHz) 3 high fequency depth meters 4 lf - low frequency flag (3.5 kHz) 5 low frequency depth meters lmet 00+040:00:00:00.928 16-10-97 00:01:19 005.53 005.53 005.69 145 141 005.15 005.12 005.15 146 148 004.4 004.4 004.4 94.07 94.06 94.07 0981.40 -0.023 00.292 00.315 Field Data Units 1 RVDAS Time Tag 2 Instrument date dd-mm-yy 3 Instrument time hh:mm:ss 4 Port wind speed (10 second running average) m/s 5 Port wind speed (min for 24 hour cycle) m/s 6 Port wind speed (max for 24 hour cycle) m/s 7 Port wind direction degrees 8 Port wind direction (standard deviation) degrees 9 Starboard wind speed (10 second running average) m/s 10 Starboard wind speed (min for 24 hour cycle) m/s 11 Starboard wind speed (max for 24 hour cycle) m/s 12 Starboard wind direction degrees 13 Starboard wind direction (standard deviation) degrees 14 Temperature (C 15 Temperature (min for 24 hour cycle) (C 16 Temperature (max for 24 hour cycle) (C 17 Relative humidity % 18 Relative humidity (min for 24 hour cycle) % 19 Relative humidity (max for 24 hour cycle) % 20 Barometric pressure millibars 21 PSP (long wave radiometer) Volts 22 PIR (short wave radiometer) Volts 23 PAR (photo-synthetically available radiation, 400 - 700 nm) Volts svp1 00+348:01:59:52.128 1539.40 Field Data Units 1 RVDAS Time Tag 2 Sound velocity m/s ltsg 00+040:00:00:06.153 6926 15.8827 0.2010 2.9218 3.239 4.334e-01 Field Data Units 1 RVDAS Time Tag 2 Scan number 3 Internal water temperature (C 4 Salinity PSU 5 External water temperature (C 6 Transmissometer signal Volts 7 Fluorometer signal (analog) Volts ladc 00+019:23:59:59.099 $PUHAW,UVH,-1.48,-0.51,250.6 Field Data Units 1 RVDAS Time Tag 2 $PUHAW 3 UVH (E-W, N-S, Heading) 4 Ship Speed relative to reference layer1 velocity2, East vector knots 5 Ship Speed relative to reference layer1 velocity2, North vector knots 6 Ship heading degrees 1The reference layer is an average velocity measured in a number of depth "bins". On the LMG, the bins are eight meters deep and bins 3-10 define the reference layer. Hence, the reference layer is the water column from 16-80 meters beneath the ship. 2The speed ouput is water velocity relative to the ship's hull and is therefore opposite of the actual movement of the ship. For example, if the ship's heading is due north, the North/South reference layer velocity is likely to be negative (southerly). lash ATTD: Attitude Data 01+081:00:00:00.806 $PASHR,ATT,345605.0,165.03,+001.86,-01.96,0.0018,0.0173,0*22 Field Data Units 1 RVDAS Time Tag $PASHR 2 ATT 3 GPS Time sec. of the week seconds 4 heading (rel. to true North) degrees 5 pitch degrees 6 roll degrees 7 Measuremnet RMS error meters 8 Baseline RMS error meters 9 attitude reset flag GGA: GPS Position Fix - Geoid/Ellipsoid 01+081:00:00:00.966 $GPGGA,235952.00,6051.7937,S,06030.2175,W,1,08,01.0,+00068,M,,M,,*79 Field Data Units 1 RVDAS Time Tag $GPGGA 2 UTC time at position hhmmss.ss 3 Latitude ddmm.mmm 4 North (N) or South (S) 5 Longitude ddmm.mmm 6 East (E) or West (W) 7 GPS quality (1=GPS 2=DGPS) 8 Number of GPS satellites used 9 HDOP 10 Antenna Height meters 11 M for Meters 12 Geoidal height meters 13 M for meters 14 age of diff. GPS data 15 differential reference station ID lgyr 01+083:00:00:02.493 $PASVW,05.5,A*1C 01+083:00:00:02.713 $IIVHW,246.4,T,,M,,N,,K*7F 01+083:00:00:03.274 $HCHDT,,T*07 HDT: True Heading 01+083:00:00:02.893 $HEHDT,246.3,T*2C Field Data Units 1 RVDAS Time Tag $HEHDT 2 Heading XXXXX = ddd.d degrees 3 T flag for true heading, checksum ROT: Rate of Turn 01+083:00:00:03.093 $HEROT,-006.3,A*03 Field Data Units 1 RVDAS Time Tag $HEROT 2 Rate of turn degrees/min 3 Status: A = data valid, checksum tgps GGA: Global Positioning Fix Data 00+040:00:00:00.985 $GPGGA,000003,6139.961,S,05949.422,W,1,6,001.64,-00036,M,00000,M,, Field Data Units 1 RVDAS Time Tag $GPGGA 2 Latitude in degrees with decimal minutes ddmm.mmm 3 North (N) or South (S) 4 Longitude in degrees with decimal minutes ddmm.mmm 5 East (E) or West (W) 6 GPS quality (1=GPS 2=DGPS) 7 Number of GPS satellites used 8 Horizontal dilution of precision (HDOP) 9 Antenna height above/below mean-sea-level (geoid) meters 10 Units for antenna height (M = Meters) 11 Geoidal Separation1 12 Units for Geoidal Separation (M = Meters) meters 13 Age of differential GPS data, number of seconds since last SC104 Type 1 or 9 14 Differental reference station ID 1Geoidal Separation: the difference between the WGS-84 earth ellipsoid and mean-sea-level (geoid). A negative value represents mean-sea-level below ellipsoid. GLL: Geographic Position - Latitiude/Logitude 00+040:00:00:00.065 $GPGLL,6139.96,S,05949.42,W,000002,A Field Data Units 1 RVDAS Time Tag $GPGLL 2 Latitude ddmm.mmm 3 North (N) or South (S) 4 Logitude ddmm.mmm 5 East (E) or West (W) 6 UTC of position hhmmss.ss 7 Status: A = Data Valid VTG: Track Made Good and Speed over Ground 00+040:00:00:00.213 $GPVTG,161,T,149,M,009.6,N,017.8,K Field Data Units 1 RVDAS Time Tag $GPVTG 2 Track, degrees true degrees 3 T flag for True 4 Track, degrees magnetic degrees 5 M flag for Magnetic 6 Speed over Ground knots 7 N flag for Knots 8 Speed over Ground kmhr 9 K flag for km/hr VHW: Speed Through Water and Heading 00+040:00:00:00.212 $GPVHW,246,T,234,M,012.3,N,022.8,K Field Data Units 1 RVDAS Time Tag $GPVHW 2 Heading, degrees True degrees 3 T flag for True 4 Heading, degrees Magnetic degrees 5 M flag for Magnetic 6 Speed through water knots 7 N flag for Knots 8 Speed through water km/hr 9 K flag for km/hr ZDA: Time and Date 00+040:00:00:00.285 $GPZDA,000002,09,02,2000,00,00 Field Data Units 1 RVDAS Time Tag $GPZDA 2 UTC time hhmmss.ss 3 Day: 01 - 31 dd 4 Month: 01 - 12 mm 5 Year yyy 6 Local time zone description1, 00 +/-13 hrs 7 Local time zone minutes description, same sign as local hours 1Zone description is the number of whole hours added to local time to obtain GMT, values are negative for East longitudes. BWC: Bearing and Distance to Waypoint 00+040:00:00:00.865 $GPBWC,000003,6209.70,S,05824.00,W,127.2,T,115.3,M,050.1,N,014 Field Data Units 1 RVDAS Time Tag $GPBWC 2 UTC of bearing hhmmss.ss 3 Destination waypoint latitude in degrees, decimal minutes ddmm.mmm 4 Hemisphere Flag: N or S 5 Destination waypoint longitude in degrees, decimal minutes ddmm.mmm 6 Hemisphere Flag: E or W 7 Bearing, degrees true degrees 8 T flag for True 9 Bearing, degrees magnetic degrees 10 M flag for Magnetic 11 Distance to waypoint in nautical miles nm 12 N flag for Nautical Miles 13 Waypoint ID lpcd GGA: GPS Position Fix - Geoid/Ellipsoid 00+019:23:59:59.301 $GPGGA,235958.409,6849.6944,S,13712.8472,W,1,06,1.2,092.4,M,047.3,M,,*67 Field Data Units 1 RVDAS Time Tag $GPGGA 2 UTC time at position hhmmss.sss 3 Latitude ddmm.mmm 4 North (N) or South (S) 5 Longitude ddmm.mmm 6 East (E) or West (W) 7 GPS quality (1=GPS 2=DGPS 3=P-CODE) 8 Number of GPS satellites used 9 HDOP 10 Antenna Height meters 11 M for Meters 12 Geoidal height meters 13 M for meters 14 Null field 15 Checksum GLL: GPS Latitude/Longitude 00+019:23:59:59.381 $GPGLL,6849.6944,S,13712.8472,W,235958.409,A*35 Field Data Units 1 RVDAS Time Tag $GPGLL 2 Latitude degrees 3 North or South 4 Longitude degrees 5 East or West 6 UTC of position hhmmss.sss 7 staus of data (A = valid) 8 Checksum VTG: GPS Track and Ground Speed 00+019:23:59:59.382 $GPVTG,238.7,T,182.3,M,001.8,N,003.3,K*41 Field Data Units 1 RVDAS Time Tag $GPVTG 2 Heading degrees 3 degrees True (T) 4 Heading degrees 5 degrees magnetic (M) 6 Ship speed knots 7 N = knots 8 Speed km/hr 9 Checksum LMG02_03 Sensors Shipboard Sensors Sensor Description Serial # Cal. Date Status Port Anemometer R.M. Young 105106 WM28392 08/15/01 collect Stbd Anemometer R.M. Young 105106 WM28393 08/15/01 collect Barometer R.M. Young 61201 BP01150 11/07/01 collect Humidity/Wet Temp R.M. Young 41372VC 6133 06/01/01 collect Mast PAR BSI QSR-240 6394 06/05/01 collect Pyranometer Eppley PSP 31701F3 06/01/01 collect Pyrgeometer Eppley PIR 32031F3 06/01/01 collect TSG SeaBird SBE21 219209-1577 11/10/01 collect TSG Remote Temp SeaBird 3-01/S 1619 06/02/01 collect Fluorometer Turner 10-AU-005 Lamp: daylight 10-045, reference filter: 10-052, emission filter: 10-051, excitation filter: 10-050. 6046RTD collect Transmissometer WET Labs C-Star CST-168R 12/20/01 collect P-Code GPS Trimble 20636-00 (SM) 220035269 PCD/CIV Bathymetry Knudsen 320B/R collect Mocness Sensors: Sensor Description Serial # Cal. Date Status Mocness Deck Unit Use for Both 1M & 10M 138 10M - Temp. Sensor Sea-Bird 2438 12/15/01 collect 10M - Cond. Sensor Sea-Bird 4-02/0 1223 12/19/01 collect 10M - Pressure Titanium strain guage 139 7/15/01 collect 1M - Temp. Sensor Sea-Bird 3plus 2444 7/26/01 collect 1M - Cond. Sensor Sea-Bird 4C 2065 11/14/04 collect 1M - Fluorometer AFLT-001 collect 1M - Pressure Titanium strain guage 149 2/24/01 collect CTD Sensors: Sensor Description Serial # Cal. Date Status CTD Fish Sea-Bird 9Plus-3400m 91480 06/23/01 collect CTD Deck Unit Sea-Bird 11Plus 11P8908-0288 collect Prim. Temp. Sensor Sea-Bird 3plus 2470 11/13/01 collect Sec. Temp. Sensor Sea-Bird 3plus 2658 11/13/01 collect Prim. Cond. Sensor Sea-Bird 4C 2247 11/14/01 collect Sec. Cond. Sensor Sea-Bird 4M-6800m 2293 12/19/01 collect Diss. Oxygen Sensor Sea-Bird 13-02-B 130545 11/30/01 collect Diss. Oxygen Sensor Sea-Bird 13-02-B 130317 8/22/00 collect Fluorometer Chelsea model Mk III Aquatracka 088211 10/4/01 collect Pressure DigiQuartz 410K-105 53952 6/23/01 collect Transmissometer WET Labs C-Star 407DR 11/26/01 collect Fluorometer CDOM collect PAR Biospherical QSP200-L4S 4561 11/8/01 collect Acquisition Problems and Events This section lists all known problems with acquisition during this cruise including instrument failures, data acquisition system failures and any other factor affecting this data set. The format is jjj:hh:mm (jjj is julian day, hh is hour, and mm is minute). All times are in GMT. Date(Julian) Time(GMT) Event Location 097 18:26 Started RVDAS, Sonar Departed PA 098 12:45 Started ADCP 68W 098 13:40 Started TSG 68W 098 20:50 Stopped ADCP DAS to run Ashtech init script 099 14:17 Cleaned Fluorometer Cell 100 13:08 Shutdown Ashtech to test Antennas due to zero roll&pitch 100 14:05 Ashtech back on - replace Line Amp on Antenna #3 102 10:26 Turn Off TSG and PCO2 Arrived at Palmer Station 102 10:53 Turn Off Sonar Arrived at Palmer Station 103 17:30 ReStarted TSG, PCO2, & Sonar Change ADCP settings Departed Palmer Station 105 03:37 RVDAS Crashed 105 03:44 Restart SVP 107 19:37 Ashtech Flake Out - Reset 108 01:35 Turn Off Ashtech - to re-make connector on Line Amp #3 109 05:16 Reset Ashtech 109 14:17 PCO2 Water level higher than normal - drained 115 22:53 Cleaned Fluorometer Cell 118 21:36 Turned off Sonar Arrived at Rothera 119 16:00 Turned on Sonar Departed Rothera 120 00:14 RVDAS Crashed 120 19:50 Sea water pump shut off due to ice 121 04:07 PCO2 shut off -> due to ice & overflowing sinks 122 22:30 Ashtech Antenna #3 problem -> cleaned connector 124 03:55 Ashtech Flake out -> reset 124 22:33 PCO2 Back on -> ice conditions improved 125 ~4:00 Barometer Jump Up in readings 125 19:00 Removed Barometer's intake & hose to Dethawed Cleaned PSP, PIR, & PAR 125 19:49 Reinstalled Barometer intake 126 02:00 Seawater Pump Kicked off due to ice 128 03:39 Ashtech Flaked out -> reset 128 19:30 PCO2 stopped to adjusted gas flows 129 3:35 Seawater Pump Kicked off due to ice 130 2:57 AshtechPitch&Roll zero <- reset 131 03:22 Ashtech Flaked out -> reset 132 03:30 Ashtech Flaked out -> reset 134 19:22 Turned Off Sonar, TSG, & PCO2 Arrived at Palmer Station 135 22:00 Change ADCP settings back 136 13:33 Turned ON Sonar, TSG, & PCO2 Departed Palmer Station 136 13:58 Ashtech Flaked Out -> reset 138 21:53 End of Data Collection 68W 16 Data Report for LMG02_03 ARSV Laurence M. Gould 22 Raytheon Polar Services United States Antarctic Program Data Report for LMG02-01 ARSV Laurence M. Gould Raytheon Polar Services United States Antarctic Program