Data Report

NBP0103

GLOBEC I

April 23, 2001 – June 6, 2001

United States Antarctic Program

RVIB Nathaniel B. Palmer

Raytheon Polar Services Company

June 6, 2001

Data Report Prepared by, Aaron Hunt, Tom Bolmer & Jim Dolan

Table of Contents

Introduction *

Archive Data Extraction *

Distribution Contents *

ADCP *

CTD *

Cruise Track *

NBP Data Products: MGD77 & JGOFS *

JGOFS *

MGD77 *

RVDAS *

Data File Names and Structures *

Ocean Data Files *

PROCESSING RAW TSG DATA *

Additional & Supplemental Files *

Additional Files *

NBP0103 Sensors *

Shipboard Sensors *

0103 CTD Sensors: *

0103 ROV Sensors: *

0103 MOCNESS Sensors: *

Acquisition Problems and Events *

Calibrations *

Barometer *

Pyranometer/PSP *

Radiometer/PIR *

Gravity Tie *

Mast Par *

GUV *

GUV *

Thermosalinograph *

TSG Internal *

TSG External *

Temperature/Humidity Sensor *

Belfort Wind Vector Transmitter *

CTD Instruments *

Transmissometer *

Underwater PAR Sensor *

Fluorimeter *

Flourimeter *

Fluorimeter *

Fluorimeter *

SBE 5T Submersible Pump Serial No: 050889 *

SBE 5T Submersible Pump Serial No:051265 *

Pressure Sensor *

Dissolved Oxygen Sensor Serial No: 130327 *

Conductivity Sensor (Primary) *

Conductivity Sensor (Secondary) *

Temperature Sensor (Primary) *

Temperature Sensor (Secondary) *

Underwater PAR Sensor (1st five casts) *

Underwater PAR Sensor (Starting 6th Cast) *

ROV Sensors *

Pressure Sensor *

Conductivity *

Temperature *

MOCNESS Calibrations *

Pressure Sensor *

Pressure Sensor *

Temperature *

Conductivity *

Dissolved Oxygen *

C-Star *

Fluorometer *

Fluorometer *

Introduction

The NBP data acquisition systems continuously log data from several instruments throughout the cruise. This document describes the format of that data and its location on the distribution DAT tapes. 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.

The data is contained in a Unix tar archive called NBP0103.tar. All of the data has been compressed using Unix "gzip" compression. 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. NBP0103.tar was created on an SGI using the following commands:

tar cvLf 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

The directories in the archive are structured in the following manner:

CD 1 of 2

CD 1 of 2 continued

NBP0103.GMT

NBP0103.MGD

NBP0103.TRK

NBP0103.ps

TOMPLOT.ps.gz

EVENTLOG.gz

ADCP/

0103ADCP.tar

0103PING.zip

GEOPDATA/

0103BAT.tar

0103GRV.tar

0103JGOF.tar

0103MAG.tar

0103NGL.tar

0103PCD.tar

0103PS.tar

0103SB.tar

0103SIM.tar

0103TSG.tar

OCEAN/

CTD/

0103PROC.tar

0103RAW.tar

0103PCO2.tar

0103TSGF.tar

0103XBT.tar

0103GUV.tar

0103XCTD.tar

REPORT/

0103DATA.doc

0103DATA.htm

0103DATA.txt

CD_cases

CALIBRAT/

INSTRMNT.CNF

RVDAS/

NAV/

0103PCOD

UW/

0103BAR.tar

0103BAT.tar

0103FLR.tar

0103GRV.tar

0103MAG.tar

0103MET.tar

0103PCO2.tar

0103SIM.tar

0103SVP.tar

0103TSG.tar

 

 

 

CD 2 of 2

RVDAS/

NAV/

0103ADCP.tar

01033DF.tar

0103GYR.tar

0103PCOD.tar

0103NGL.tar

WINZIP

ADDITION/

0103ESS.tar

0103MET.tar

 

 

 

 

Distribution Contents

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.

CTD

The ctd data and report have been placed in the tar file 0103ctd.tar, which contains the following structure:

ctdlist.txt (list of all ctd stations)

ctdsetup (batch files, cfg & con files)

0103Raw (raw datafiles)

0103Proc (processed data files)

seasoft (application for processing CTD data

Individual CTD casts are represented by a set of four files containing a bottle-firing file (.bl), a configuration file (.con), a data file (.dat) and a header file (.hdr). Casts are numbered according to the cruise id number (0103) followed by the number of the cast. For example; the raw files associated with the third cast on this cruise are: 0103003.bl, 0103003.con, 0103003.dat, 0103003.hdr. The raw and processed data files are in binary format. The 1 db bin averaged up and down traces have been converted to ASCII (.asc files).

SeaBird’s SeaSoft software used to acquire the data is included in the CTD data distribution in the "Seasoft" directory. SeaSoft is a DOS-based software package, but can be run in a DOS window under the Windows9X operating systems for cast playback and data analysis. The software package used to process this data (version 4.234) is included on this CD in the directory Seasoft. The configuration files and processing scripts (written by Suzanne O’Hara for the standard processing of the SBE 9/11plus) are also included in the Seasoft directory under in the ctdsetup directory. The directory report contains the CTD data report with folder for all plots produced during the cruise. The directory seacat has a structure similar to the ctd directory and contains the data from the SeaCat CTD unit.

File extension definitions:

EXT

Description

ASC

The data portion of a .CNV converted data file written in ASCII by ASCIIOUT, or files written by TERM37.

BL

Created by SEASAVE when a bottle fire confirmation is received. Contains bottle sequence number, position, date, time, beginning and ending scan numbers.

BTL

Created by ROSSUM. This is a summary of the data in a .ROS file.

BSR

Bottle scan range file, used by DATCNV to create a .ROS file.

CFG

Used by SEASOFT modules to store the input filename, input data path, output data path, and other miscellaneous module specific parameters.

CTR

Density contour file generated by CONTOUR.

CNV

‘Converted’ engineering unit data file. An ASCII header precedes the data.

CON

Contains instrument configuration and calibration coefficients, used by SEACON, SEASAVE, and DATCNV

DAT

Raw binary data, optionally with header information (SBE 9/11, 11X, 9/11plus, and data files created with previous versions of SEASOFT).

DSP

Used by SEASAVE to store data acquisition and display parameters.

HDR
  1. Header portion of a .CNV converted data file written by ASCIIOUT.

2) Header recorded when acquiring real time data or uploading archived data.

HEX

Raw HEX data with header information (SBE 16, 17, 19, 21, and 25)

MRK

Marker file created by SEASAVE during real time data acquisition.

PLT

Used by SEAPLOT to store display parameters

ROS

Scans marked with the bottle fire confirmation bit, or defined by a .BSR file, written by DATCNV.

*Note: This is a complete list of all file extensions. This data set may not contain ALL of the above extension files.

SEASOFT modules search the current directory for DSP, PLT, and CFG files. SEASOFT modules search the ‘input data path’ for CON, HEX, DAT, and CNV files. One exception is SEACON which searches the current directory for CON files.

For more information and updated software visit the web site at www.seabird.com; or contact (206) 643-9866, seabird@seabird.com, Sea-Bird Electronics 1808 – 136th Place NE Bellevue, WA 98005

Cruise Track

A Postscript cruise track file has been produced for this cruise called NBP0103.ps. It is a standard US Letter sized (8.5" x 11") plot. A GMT cruise track file (NBP0103.trk) is also included, which contains the longitude and latitude at one-minute intervals extracted from the NBP0103.gmt file.

NBP Data Products: MGD77 & JGOFS

NBP0103.mgd

NBP0103.gmt

/geopdata/JGOF

/geopdata/PROC

Two data products are created on each cruise of the NBP: JGOFS and MGD77.

JGOFS

The JGOFS data set consists of a single file produced each day named jgDDD.dat.gz where DDD is the Julian day the data was acquired. The ".gz" extension indicates that the individual files are compressed before archiving. The daily file consists of 20 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. For example, Course Made Good (CMG) and Speed Over Ground (SOG) are calculated from gyro and GPS inputs by the NGL software package. Similarly, the wind direction field is the vector sum of the separate X and Y inputs received from the wind instruments. The JGOFS data set was used to produce the daily data plots during the cruise. Note: Null, unused, or unknown fields are filled with 9’s in the JGOFS data. TSG data is processed by RVDAS.

Field

Data

Units

01

GMT date

dd/mm/yy

02

GMT time

hh:mm:ss

03

NGL latitude (negative is South)

dd.dddd

04

NGL longitude (negative is West)

ddd.dddd

05

speed over ground

Knots

06

GPS HDOP

-

07

Gyro Heading

Degrees (azimuth)

08

course made good

Degrees (azimuth)

09

mast PAR

mEinsteins/meters2 sec

10

sea surface temperature

° C

11

sea surface conductivity

siemens/meter

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

-

MGD77

The MGD77 data set is contained in a single file for the entire cruise named NBP0103.mgd, There is also a file named NBP0103.gmt. This file is the output of the mgd77togmt utility using NBP0103.mgd as input. The "gmt" file can be useful for plotting data using the GMT plotting package. The directory /geopdata/PROC contains a file from each day of data acquisition named: Dddd.fnl.gz, where ddd is the Julian day. These files contain all the data used to produce the "mgd" file, but in a space-delimited columnar format that may be more accessible for some purposes. In addition, these files contain data at one-second intervals rather than one minute and are individually "gzipped" to save space. Below is a detailed description of the MGD77 data set format.

All decimal points are implied. Leading zeros and blanks are equivalent. Unknown or unused fields are to be filled with 9’s. All "corrections", such as time zone, diurnal magnetics, and Eotvos, are understood to be added.

Col

Len

Type

Description

1

1

int

DATA RECORD TYPE Set to "3" for data record.

2-9

8

char

SURVEY IDENTIFIER

10-14

5

int

TIME-ZONE CORRECTION: In hundredths of hours. Corrects time (in characters 13-27) to GMT when added: equals zero when time is GMT.

15-16

2

int

YEAR 2 digit year

17-18

2

int

MONTH (e.g. May is represented as 05)

19-20

2

int

DAY Day of month

21-22

2

int

HOUR

23-27

5

real

MINUTES X 1000

28-35

8

real

LATITUDE X 100000 + = North; - = South. (–9000000 to 9000000)

36-44

9

real

LONGITUDE X 100000 + = East; - = West. (–18000000 to 18000000)

45

1

int

POSITION TYPE CODE: 1=Observed fix; 3=Interpolated; 9=Unspecified

46-51

6

real

BATHYMETRY, 2- WAY TRAVELTIME: In 10,000th of seconds. Corrected for transducer depth and other such corrections

52-57

6

real

BATHYMETRY, CORRECTED DEPTH: In tenths of meters.

58-59

2

int

BATHYMETRIC CORRECTION CODE: This code details the procedure used for determining the sound velocity correction to depth

60

1

int

BATHYMETRIC TYPE CODE: 1 = Observed; 3 = Interpolated (Header Seq. 12); 9 = Unspecified

61-66

6

real

MAGNETICS TOTAL FIELD, 1ST SENSOR: In tenths of nanoteslas (gammas).

67-72

6

real

MAGNETICS TOTAL FIELD, 2ND SENSOR: In tenths of nanoteslas (gammas). For trailing sensor.

73-78

6

real

MAGNETICS RESIDUAL FIELD: In tenths of nanoteslas (gammas). The reference field used is in Header Seq. 13.

79

1

int

SENSOR FOR RESIDUAL FIELD

1 = 1st or leading sensor; 2 = 2nd or trailing sensor; 9 = Unspecified

80-84

5

real

MAGNETICS DIURNAL CORRECTION: In tenths of nanoteslas (gammas). (In nanoteslas) if 9-filled (i.e., set to "+9999"), total and residual fields are assumed to be uncorrected; if used, total and residuals are assumed to have been already corrected.

85-90

6

F6.0

DEPTH OR ALTITUDE OF MAGNETICS SENSOR: In meters. + = Below sea level 3 = Above sea level

91-9

7

real

OBSERVED GRAVITY: In 10th of mgals. Corrected for Eotvos, drift, tares.

98-10

6

real

EOTVOS CORRECTION: In tenths of mgals.

E = 7.5 V cos phi sin alpha + 0.0042 V*V

104-108

5

real

FREE-AIR ANOMALY In tenths of milligals

Free-air Anomaly = G(observed) – G(theoretical)

109-113

5

char

SEISMIC LINE NUMBER: Used for cross-referencing with seismic data.

114-119

6

char

SEISMIC SHOT-POINT NUMBER

120

1

int

QUALITY CODE FOR NAVIGATION: 5=Suspected, by the originating institution;6=Suspected, by the data center, 9=No identifiable problem found

RVDAS

rvdas/uw

rvdas/nav

Daily data processing of the RVDAS data is performed to convert values into usable units and as a check of the proper operation of the DAS. Both the raw and processed data sets from RVDAS are included in the data distribution. 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

met1

continuous

0.5 sec

R. M. young 41342C

Relative Humidity

met1

continuous

0.5 sec

Rotonics MP-101A-C4

Wind Speed/Direction

met1

continuous

0.5 sec

Belfort Model 5-122AHD

PIR (LW radiation)

met1

continuous

0.5 sec

Eppley PIR

PSP (SW radiation)

met1

continuous

0.5 sec

Eppley PSP

PhotoActive Radiation

met1

continuous

0.5 sec

BSI QSR-240

Barometer

bar1

continuous

9 sec

AIR-DB-3A

Navigational Data

Measurement

File ID

Collect. Status

Rate

Instrument

Attitude GPS

3df1

continuous

1 sec

Ashtec 12

P-Code GPS

PCOD

continuous

1 sec

Trimble 20636-00SM

Gyro

gyr1

continuous

0.2 sec

Yokogawa Gyro

NGL

ngl1

continuous

1 sec

NGL Processed Nav Data

Geophysical Data

Measurement

File ID

Collect. Status

Rate

Instrument

Gravimeter

grv1

continuous

1 sec

Lacoste & Romberg Gravity

Magnetometer

mag1

transit

15 sec

EG&G G-866

Bathymetry

bat1

continuous

varies

ODEC Bathy 2000

Bathymetry

sim1

depth < 2500 m

varies

Simrad EK200 Sonar

Oceanographic Data

Measurement

File ID

Collect. Status

Rate

Instrument

Conductivty

tsg1

continuous

15 sec

SeaBird 21

Salinity

tsgfl

continuous

15 sec

calculated from conductivity

Sea S Temperature

tsg1

continuous

15 sec

SeaBird 3-01/S

Fluorometry

flr1 & tsg1

continuous

15 sec

Turner 10-AU-005

pCO2

pco2

continuous

70 sec

 

ADCP

adcp

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 subdirectories exist under the top-level rvdas directory. The instruments are broken down as shown. Each data file is gzipped 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: NBP[CruiseID][ChannelID].dDDD.

 

 

Underway Data

Channel ID

 

Navigation Data

Channel ID

Barometer

bar1

 

Ashtech GPS

3df1

Bathy 2000

bat1

 

Trimble GPS (P-Code)

PCOD

Fluorometer

flr1

 

Gyro Compass

gyr1

Gravimeter

grv1

 

Furuno GPS

gp02

Magnetometer

mag1

 

NGL

ngl1

Meteorological

met1

 

ADCP course

adcp

Simrad

sim1

 

 

 

Thermosalinograph

tsg1

 

 

 

pCO2

pco2

 

 

 

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 file:

bar1

00+019:23:59:57.441 963.25

Field

Data

Units

1

Time Tag

 

2

Pressure

mBar

 

bat1

00+019:23:59:53.901 ;I04485.3ME-23.0,I00000.0,-99.9, 0000@01/11/00,23:59:52.08 PW2 PF1 SF1 PL3 MO4 SB3 PO0 TX1 TR: GM5 1500 06.7 -72.1

Field

Data

Units

1

RVDAS Time Tag

 

2

Flagged Low Freq. Chn. Depth w/ units ;FDDDDD.DUN F= V valid, I invalid

meters

3

Low Freq. Echo Strength EEE.EE

dB

4

Flagged High Freq. Chn. Depth – unused

 

5

High Freq. Echo Strength – unused

 

6

Signed Heave Data SHHHH

cm

7

Date

mm/dd/yy

8

Time

hh:mm:ss

9

transmit pulse window type: PW1 Rectangular, PW2 Hamming, PW3 Cosine, PW4 Blackman

 

10

Primary transmit frequency PF1 3.5 kHz, PF2 12.0 kHz

 

11

Parametric mode secondary freq. SF1 3.5 kHz, SF2 12.0 kHz

 

12

pulse length: PL1 200usec, PL2 500usec, PL3 1msec, PL4 2msec, PL5 5msec, PL6 10msec, PL7 25msec. If transmit mode is FM: PL1 25msec, PL2 50msec, PL3 100msec.

 

13

Operating Mode: MO1 CW parametric, MO2 CW, MO3 FM parametric, MO4 FM

 

14

Frequency sweep bandwidth: SB1 1 kHz, SB2 2 kHz, SB3 5 kHz

 

15

power level: PO1 0dB, PO2 -6dB, PO3 -12dB, PO4 -18dB, PO5 -24dB, PO6 -30dB, PO6 -30 dB, PO7 -36dB, PO8 -42dB

 

16

Transmit Mode: TX1 single ping active, TX2 pinger listen, TX3 multipinging TR, TX4 multipinging TR, TX5 multipinging TTRR, TX6 multipinging TTTTRRRR, TX7 multipinging TTTTTRRRRR

 

17

Transmit Rate: TR3 4Hz, TR4 2Hz, TR5 1Hz, TR6 .5Hz, TR7 .33Hz, TR8 .25Hz, TR9 .20Hz, TR: = .10Hz, TR; = .05Hz

 

18

System Gain Mode: GM0 hydrographic AGC, GM1 to GM9 hydrographic +3db to + 27db manual. GMA to GMD hydrographic + 30db through + 60db manual, GME to GMK sub-bottom 1 through sub-bottom 7

 

19

speed of sound

m/sec

20

depth of sonar window below sea-level

meters

21

background noise level in fixed point reference

dB/V

flr1

00+019:23:59:58.061 0 0818 :: 1/19/00 17:23:17 = 0.983 (RAW) 1.2 (C)

Field

Data

Units

1

RVDAS Time Tag

 

2

marker 0 to 8

 

3

4-digit index

 

4

date

mm/dd/yy

5

time

hh:mm:ss

6

signal

 

7

signal units of measurement

 

8

cell temperature

 

9

temperature units

 

grv1

99+099:00:18:19.775 your_line#1999 99 01818 9735.4

Field

Data

Units

Conversion

1

RVDAS Time Tag

 

 

2

text string

 

 

3

gravity device date

yyyyjjjhhmmss

 

3

gravity count

count

mgal = count x 1.0047 + offset

mag1

99+099:00:00:23.203 % 0 98 235928 0?372453

Field

Data

Units

1

RVDAS Time Tag

 

2

% 0 denotes G-866 magnetometer

 

3

Julian Day

 

4

Time

 

5

0? denotes high noise condition

 

6

Magnetic Data (last digit is 10th’s place)

nT

met1

00+019:23:59:59.761 $MET: 0.84, 1.12, 0.76, 1.06, 4.98, 0.26, 1.49, 3.93, 8.94, 0.80, 0.01, 0.01, 0.01, 0.22, 0.02, 0.1,40.11,4.96

Field

Data

Units

Conversion

1

RVDAS Time Tag

 

 

2

$MET

 

 

3

starboard windbird north rel. speed vector voltage

V

m/s = 7.553 x voltage

4

starboard windbird east rel. speed vector voltage

V

m/s = 7.553 x voltage

5

Port windbird north rel. speed vector voltage

V

m/s = 7.553 x voltage

6

Port windbird east rel. speed vector voltage

V

m/s = 7.553 x voltage

7

Air temperature

V

° C = 10 x voltage - 50

8

PIR Eppley Pyrgeometer

V

W/m2 = 923.87 x voltage

9

PSP Eppley Pyranometer

V

W/m2 = 194.53 x voltage

10

Temperature at the Relative Humidity Sensor

V

° C = 10 x voltage – 40

11

Relative Humidity

V

%RH = 10 x voltage

12

PAR Irradiance

V

mEi/m2s = 1662.24 x voltage

13-17

spare channels

 

 

18

AC line voltage

V

VAC = 150 x voltage

19

uMac Temperature

C

 

20

uMac DC Supply

V

 

pCO2

00+021:23:59:43.190 2000021.9992 2382.4 984.2 30.73 50.8 345.9 334.1 -1.70 -68.046 -144.446 Equil

Field

Data

Units

1

RVDAS Time Tag

 

2

pCO2 Time Tag (decimal is time of day)

yyyjdd.fod

3

raw voltage

mV

4

barometer

mBar

5

cell temperature

° C

6

flow rate

cm3/min

7

concentration

ppm

8

pCO2 pressure

microAtm

9

Equilibrated temperature

° C

10

Latitude

degrees

11

Longitude

degrees

12

Flow Source (Equil = pCO2 measurement)

 

sim1

00+005:00:00:52.388 D1,23583509,1479.6, 17, 1, 0

Field

Data

Units

1

RVDAS Time Tag

 

2

Header

 

3

Time Tag

hhmmss.sss

4

depth

m

5

bottom surface backscattering strength

dBar

6

transducer number ( 1 = 38 kHz )

 

7

 

 

tsg1

00+019:23:59:46.976 15A16CFC163F8C2C100

Field

Data

Units

1

RVDAS Time Tag

 

2

Seabird Hex string (see notes on converting to real units)

 

3df1

PBEN: Measurement Data

00+019:23:59:57.054 $PASHR,PBN,345609.00,-1695527.0,-1569301.4,-5925126.0,-068:49.6968,-137:12.8448,00047.7,-000.69,000.67,-000.51,08,????,02,01,02,01*32

Field

Data

Units

1

RVDAS Time Tag $PASHR

 

2

PBN

 

3

GPS Time sec. of the week

seconds

4

Station Position: ECEF X

meters

5

Station Position: ECEF Y

meters

6

Station Position: ECEF Z

meters

7

Latitude ( - = South )

deg:min

8

Longitude ( - = West )

deg:min

9

altitude

meters

10

velocity in ECEF X

m/sec

11

velocity in ECEF Y

m/sec

12

velocity in ECEF Z

m/sec

13

number of satellites used

 

14

site name

 

15

PDOP

 

16

HDOP

 

17

VDOP

 

18

TDOP

 

ATTD: Attitude Data

00+019:23:59:57.854 $PASHR,ATT,345610.0,252.82,+000.52,+001.95,0.0011,0.0068,0

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

Measurement RMS error

meters

8

Baseline RMS error

meters

9

attitude reset flag

 

GGA: GPS Position Fix – Geoid/Ellipsoid

00+019:23:59:57.134 $GPGGA,235956.00,6849.6968,S,13712.8448,W,1,08,01.0,+00048,M,,M,,

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

 

gyr1

00+019:23:59:59.952 $HEHRC25034,-020*73

Field

Data

Units

1

RVDAS Time Tag

 

2

$HEHRC

 

3

Heading XXXXX = ddd.dd

degrees

4

Rate of Change SYYY S = +/-, YYY = r.rr

 

5

Checksum

 

ngl1

00+019:23:59:59.857 -68.82822,-137.21416,1.10,279.27,251.10,0.00,0.00,0,18.2587,1,1146973

Field

Data

Units

1

RVDAS Time Tag

 

2

Latitude (south is negative)

degrees

3

Longitude (west is negative)

degrees

4

Ship Speed

knots

5

Course made good

degrees

6

Gyro Heading

degrees

7

PDOP

 

8

HDOP

 

9

quality

 

10

GPS up

 

11

Fix Number

 

PCOD

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

 

2

$GPGGA

 

3

UTC time at position

hhmmss.sss

4

Latitude

ddmm.mmm

5

North (N) or South (S)

 

6

Longitude

ddmm.mmm

7

East (E) or West (W)

 

8

GPS quality (1=GPS 2=DGPS 3=P-CODE)

 

9

Number of GPS satellites used

 

10

HDOP

 

11

Antenna Height

meters

12

M for Meters

 

13

Geoidal height

meters

14

M for meters

 

15

age of diff. GPS data

 

16

differential reference station ID

 

17

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

 

2

$GPGLL

 

3

Latitude

degrees

4

North or South

 

5

Longitude

degrees

6

East or West

 

7

UTC of position

hhmmss.sss

8

status of data (A = valid)

 

9

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

 

2

$GPVTG

 

3

heading

degrees

4

degrees True (T)

 

5

heading

degrees

6

degrees magnetic (M)

 

7

Ship speed

knots

8

N = knots

 

9

speed

km/hr

10

K = km per hour

 

11

checksum

 

adcp

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 layer, East vector

kn.

5

Ship Speed relative to reference layer, North vector

kn.

6

Ship heading

degrees

Ocean Data Files

ocean/

Some data files are "processed" into a slightly different form. The pCO2 data is merged with data from other sources for ease of data analysis.

pCO2-merged

00+019:23:58:15.502 2000019.9983 2445.2 965.0 32.90 52.8 372.3 352.5 -1.27 -68.8285 -137.2080 Equil -68.8280 -137.2079 -1.58 33.60 0.97 9.06 307.23 50.0

Field

Data

Units

1

RVDAS Time Tag

 

2

pCO2 Time Tag (decimal is time of day)

yyyjdd.fod

3

raw voltage

mV

4

barometer

mBar

5

cell temperature

° C

6

flow rate

cm3/min

7

concentration

ppm

8

pCO2 pressure

microAtm

9

Equilibrated temperature

° C

10

Flow Source (Equil = pCO2 measurement)

 

11

RVDAS latitude

degrees

12

RVDAS longitude

degrees

13

TSG external temperature

° C

14

TSG salinity

PSU

15

TSG fluorometry

V

16

RVDAS true wind speed

m/s

17

RVDAS true wind direction

degrees

18

RVDAS barometer

mBar

19

uncontaminated seawater pump flow rate

l/min

20

Ship's speed over ground

kn

21

Ship's course made good

°

PROCESSING RAW TSG DATA

Raw TSG data is stored as a hex string 20 bytes long.

Bytes

Data

1-4

Sensor Temperature

5-8

Conductivity

9-14

Remote Temperature

15-17

Fluorometer voltage

18-20

unused voltage

In all of the formulas listed below, the variables can be found in the TSGcal file.

Calculating Temperature

T = decimal equivalent of bytes 1-4

Temperature Frequency: f = T/19 +2100

q = ln(fo/f)

Temperature = 1/{a + b * q + c * q2 + d * q3} -273.15 (degrees C)

Calculating Conductivity

C = decimal equivalent of bytes 5-8

Conductivity Frequency f = sqrt(C*2100+6250000)

Conductivity = (afm +bf2 +c +dt)/[10(1+ep)] (siemens/meter)

note e = epsilon in the TSGcal file

Calculating Fluorometry Voltage

f = decimal equivalent of bytes 15-17

Fluorometry Voltage = f/819

Additional & Supplemental Files

 

Additional Files

Data volume 2 contains a directory called ADDITION. This directory contains data files that that were created by science groups on NBP0103. The files and their descriptions are as follows:

0103ESS.tar BIOMAPER Data

0103MET.tar Weather information.

NBP0103 Sensors

Shipboard Sensors

Sensor

Description

Serial #

Cal. Date

Status

Port Anemometer

Belfort 5-122AHD

2133

4/12/01

collect

Stbd Anemometer

Belfort 5-122AHD

7956

6/23/98

collect

Barometer

Atmospheric Instr. AIR-DB-3A

7G3095

7/21/00

collect

Mast PRR

BSI PRR-610

9696

3/18/99

not collect

UW PRR

BSI PRR-600

9695

3/18/99

not collect

Rel. Hum./Air Temp

Rotronics MP-101A-C4

R45618

6/20/00

collect.

Mast PAR

QSR-240

6356

2/15/01

collect

GUV

Biospherical Instruments

9228

3/15/00

collect

P-Code GPS

Trimble 20636-00 (SM)

 

 

PCD/CIV

Attitude GPS

Ashtech 12

700273F2114 FW 7B13-D1-C21

 

collect

Pyranometer

Eppley PSP

33090F3

11/7/00

collect

Pyrgeometer

Eppley PIR

33023F3

7/23/98

collect

Dry Air Temp

R. M. Young 41342C

2267

10/1/99

collect

TSG

SeaBird SBE21

218091-857

7/2/01

collect

TSG Remote Temp

SeaBird 3-01/S

2593

01/03/01

collect

Magnetometer

EG&G G-866

 

 

off ship

Gravimeter

Lacoste & Romberg Gravity Meter

 

 

not collect

Bathymetry

Simrad EK200

3001

11/1/95

collect

Bathymetry

Bathy 2000

 

 

collect

0103 CTD Sensors:

Sensor

Description

CTD Fish

SeaBird model SBE 9+ SN 09510716-0377, w/Paroscientific model 410K-105 pressure sensor SN 58949

CTD Deck Unit

SeaBird model SBE 11+ SN 11P7536-0317

Primary Temperature Sensor

SeaBird model 3-02/F SN 1457. Last cal 06/28/00.

Secondary Temperature Sensor

SeaBird model 3-02/F SN 1649. Last cal 06/28/00.

Primary Conductivity Sensor

SeaBird model 4-02/0 SN 1798. Last cal 06/27/00.

Secondary Conductivity Sensor

SeaBird model 4C SN 1431. Last cal 07/20/00.

Dissolved Oxygen Sensor

SeaBird model 13-02-B SN 130243. Last cal 6/27/00.

Pressure Sensor

Paroscientific 410k-105 SN 58949. Last cal 8/20/99

Underwater PAR Sensor

Biospherical Instruments QSP-200L4S. Last cal 8/16/00

Underwater PAR Sensor

Biospherical Instruments QSP-200L4S. Last cal 2/28/01

Transmissometer

Sea-Tech 25cm 474 (2000m).

Fluorometer

Chelsea model Mk III Aquatracka SN 088080. Last cal 6/2/00

0103 ROV Sensors:

Sensor

Description

Microcat

SeaBird model 37-SM 1024M SN 1265. Last cal 11/9/99

 

 

 

 

 

0103 MOCNESS Sensors:

Sensor

Description

Pressure Sensor

BESS Moc01 SN 0925. Last cal 9/30/00

Temperature Sensor

SeaBird model 3-01/S SN 032691. Last cal 9/27/00

Conductivity Sensor

SeaBird model 4C SN 041850. Last cal 05/18/00

Transmissometer

WetLabs model CST SN 397DR. Last cal 04/24/00.

Dissolved Oxygen Sensor

SeaBird model 13-02-B SN 230925. Last cal 09/26/00.

Fluorometer

WetLabs model AFLT SN 99. Last cal 04/24/00

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.

Start Time

End Time

Event

116

 

New Cruise NBP0103 – Argentina 200 Mile Limit: Turn on all logging.

127 13:00

132 18:00

PIR batter failed. Batter replaced, instrument working again.

130 16:38:56

131

PCODE GPS failed. Antenna fixed, GPS working again.

140 20:00

 

Changed out port windbird for S/N 7956

 

154 18:15

End Data collection at Argentina’s 200 Mile limit.

 

 

 

Calibrations

Barometer

Pyranometer/PSP

Radiometer/PIR

Gravity Tie

Mast Par

GUV

GUV

Thermosalinograph

TSG Internal

TSG External

Temperature/Humidity Sensor

Belfort Wind Vector Transmitter

CTD Instruments

Transmissometer

Fluorimeter

Fluorimeter

Fluorimeter

Fluorimeter

SBE 5T Submersible Pump Serial No: 050889

SBE 5T Submersible Pump Serial No:051265

Pressure Sensor

Dissolved Oxygen Sensor Serial No: 130327

Conductivity Sensor (Primary)

Conductivity Sensor (Secondary)

Temperature Sensor (Primary)

Temperature Sensor (Secondary)

Underwater PAR Sensor (1st five casts)

Underwater PAR Sensor (Starting 6th Cast)

ROV Sensors

Pressure Sensor

Conductivity

Temperature

MOCNESS Calibrations

Pressure Sensor

Pressure Sensor

Temperature

Conductivity

Dissolved Oxygen

C-Star

Fluorometer

Fluorometer