NBP data (1994, 2000, 2007 and 2009) readme. December 5,  2010.

This directory contains the processed ctd data collected during 1994, 2000, 2007 and 2009 aboard the R/V NB Palmer. 2009 data are not yet fully edited CTD data (January 2010). Please alert us to any anomalies you find. The rest  of the data are final CTD and were submitted to NODC during past years.

Data files format: (filenames: name.###, where ### indicates station number).

Example:
nbp0901.104:      CTD downtrace

Common to all years:
First line:
    The first line is the the header line and contain all the information needed to identify the station, as described below:
 
TPPCC SSSS CC  SDD.DDDD SDDD.DDDD  YYYY/MM/DD         YDA HH:MM    CRUISE_ID
C3206  104  1 -74.1660 -104.0021 2009/01/31  31 18:01  NBP0901

               T  -  data type (C: ctd, B: bottle, A: axbt, X: xbt)

                PP - NODC platform code

                CC - NODC country code of the platform

                SSSS - station number

                CC - cast number

                SDD.DDDD - latitude in decimal degrees (S; sign, + optional)

                SDDD.DDDD - longitude in decimal degrees

                YY/MM/DD - date, year/month/day

                YDA - year-day for year of collection

                HH:MM - time, hour:minutes GTM at start down

                CRUISE_ID - optional cruise identifier, one word

FOR 2009 ONLY you will find an additional 2 and 3 lines with position/time.
Second and third lines:

SDD.DDDD SDDD.DDDD  YYYY/MM/DD      YDA     HH:MM 
-74.1655 -104.0022 2009/01/31  31 18:11
-74.1653 -104.0022 2009/01/31  31 18:20

                SDD.DDDD - latitude in decimal degrees (S; sign, + optional)
                SDDD.DDDD - longitude in decimal degrees

                YY/MM/DD - date, year/month/day

                YDA - year-day for year of collection

                HH:MM - time, hour:minutes
The second line has the information when the CTD was at the bottom of the cast, the third line, at the END of station.

For the rest of the years:
Second line:
Line for other cast information, physical characteristics at the station location.  This line must begin with the
character '&' in the first column. 

 ap: air pressure in millibars (hectopascals); at: air  temperature  in degrees C; ws for wind speed in meters per second, and wd for wind direction in degrees.
Fields are separated by tabs or spaces. zc: bottom depth corrected (meters), zm: distance from  bottom at closest approach of CTD (m). A line to denote this would be:

&zc:321  zm:8  at:-4.2  ap:997.6  ws:2.3  wd:136

 There may be as many comment lines as desired that do not start with
an '&' or an '@'.  

     The column identification line contains mnemonics of at least two unique
characters that identify the data in the columns below.  This line must start
with an '@' in the first column. 

For CTD files: 
Down:
@pr	te	sa	ox	pt	co	tr

pressure, temperature (ipts-68), salinity, oxygen, potential temperature, conductivity, transmissometer.

NO VALUES:  indicated by -9.

Contacts: Stan Jacobs           sjacobs@ldeo.columbia.edu
	       Claudia Giulivi      claudiag@ldeo.columbia.edu