TITLE: ACE-ASIA Ship Ron Brown Oceanography Downwelling Irradiance, 
       Upwelling Irradiance, Upwelling Radiance [continuous profiles], 
       Photosynthetic pigments at discrete depths, Particle and Soluble 
       absorption at discrete depths (Mitchell)

AUTHORS:

     Greg Mitchell (gmitchell@ucsd.edu)
     Mati Kahru (mkahru@ucsd.edu)

1.0  DATA SET OVERVIEW:

     The data formats conform to those of the NASA SIMBIOS program 
     (http://seabass.gsfc.nasa.gov/).

     In short, the data is presented in ASCII tables with specific headers 
     (tags).  Nomenclature is given at the above website.

     The same data has been submitted to the SeaBASS database of NASA/SIMBIOS.  
     More data as well as updates will be submitted directly to SIMBIOS.  
     Currently the SIMBIOS database is restricted to SIMBIOS PIs but it will 
     be made public after a certain lag period.

     In short, this dataset includes:

     vertical profiles of ocean optical parameters obtained with various 
     instruments;

     phytoplankton pigments at fixed depths;
     
     absorption coefficient (of particulate, detrital and dissolved organic 
     material) of water samples collected at fixed depths.

2.0  DESCRIPTION OF DATA FILES:

     cruise name = $CRUISE = ace0103

     Files in this set:

===========================================================================

     prr_$CRUISE.tar.gz - a compressed tar file of PRR-800 vertical casts

       inludes *.sbmer = vertical casts including Lu, Ed, Eu, Es, etc., 
       extrapolated to the surface (0-)

       The Lu data in *.sbmer files has not been corrected for the 
       instrument self-shading. Self-shading correction is being done only 
       for the surface-extrapolated values in a separate file. The difference 
       is usually less than 3% (Kahru and Mitchell, 1998. Evaluation of 
       instrument self-shading and environmental errors on ocean color 
       algorithms, Proceedings of Ocean Optics XIV, CD-ROM, Kona, Hawaii, 
       eds. S. Ackelson & J. Campbell, Nov 1998.

       In most stations more than 1 vertical casts were made, however, only 
       one cast (the best) per station is included here.

       NOTE: the Lu443 channel on this cruise was unusually noisy due to some 
       hardware problem. It was corrected in my 2nd submission.


     cal8000900111v2.mdb - the calibration file for the BSI PRR-800 in MS 
     Access database format.

===========================================================================

     ac9_$CRUISE.tar.gz is a compressed tar-file with many ac*.a715.sb files
       - these are vertical casts including 8 wavelengths of agp and
       9 wavelengths of c obtained with the AC9 Absorption and Attenuation 
       meter.  Depth-binned at 1 m intervals.

     ac90154_10.dev is the calibration file used

===========================================================================

     hs6_$CRUISE.tar.gz is a compressed tar-file with many H*.bin2.sb files
       - these are vertical casts including 6 wavelengths of bb
       obtained with the Hydroscat-6 backscattering meter.
       Depth-binned at 1 m intervals.

     hs97118_991202.ini is the calibration file used

===========================================================================

     hplc_$CRUISE.txt.sb - has all HPLC data

===========================================================================

     chldepths_$CRUISE.txt.sb - has all the depth samples of CHL, Phaeo

===========================================================================

     apad.tar - a tar file with ap, ad scans
       includes as01pNNN.sb.dat
       NNN = sequence number of the sample, e.g. aa01p073.sb.dat,
       has the absorption coefficients of the particulates (ap) and detritus 
       (ad) for 300-750 nm.
       The method of estimating ap: Mitchell, B.G., Ocean Optics X, 
       p.137-148, 1990; of ad: Kishino et al. 1985.

===========================================================================

     ag.tar - a tar file with ag scans
       aa01sNNN.sb.dat
       NNN = sequence number of the sample, e.g. aa01s073.sb.dat,
       has the absorption coefficients of CDOM (ag) for 250-650 nm.
       The NNN number for the ag sample is usually the same for ap, ad 
       values from the same bottle sample.

       Some small negative values at longer wavelengths have been set to 
       0.0; small negative numbers are the result of small errors when 
       subtracting the blank or doing the red correction. A more robust 
       method of estimating ag at a particular wavelength is not to use the 
       measured value but to fit an exponential decay curve through the data 
       and using the value from the fitted curve. We do this regularly and 
       can provide the estimated ag value at 300 nm, the exponential slope 
       and the error of the fit. The exponential slope seems to change for 
       wavelengths below 300 nm; therefore we do not use values < 300 nm for 
       fitting the exponential curve in the visible range.

===========================================================================


     Other variables will be added later (as soon as they become available).