(1) FILE NAME:  9607odsc.oga
                 DATA FILE NAME:  9607odsc.ogb

 (2) YEAR and MONTH:  1996, July

 (3) PI:  Dr. Jack Blanton

 (4) OTHERS:  Julie Amft
 
 (5) BRIEF DESCRIPTION OF DATA FILE:  ODIS (surface mapper) file that measured 
     various environmental parameters every 15 seconds in the Ogeechee River 
     during a Low Water survey on 23-24 July 1996.  

 (6) KEYWORDS:  Ogeechee, ODIS

 (7) RESEARCH LOCATION:  The Ogeechee River from OG+00.2 to OG+15.5
     (2-character river code + 3-digit code for upstream distance from
     river mouth in km).

 (8) EXPERIMENTAL DESIGNS and METHODS:  The Oceanographic Data Interface System
     (ODIS) was designed to interface with an assortment of instruments that 
     are on the R/V BLUE FIN (Skidaway Institute of Oceanography).  The intake
     for this flow-through system is located at the hull, approximately 1.5m 
     below the water surface.  ODIS is connected to a Global Positioning System
     (GPS), a fathometer, a Sea-Bird Electronics thermosalinograph (SBE-21), up
     to three Turner Designs fluorometers and an external temperature sensor.  

 (9) NOTES AND COMMENTS:  Predicted tidal height at ~OG+01:  High Water at 
     1321 EST, Low Water at 1950 EST; Eastern Standard Time + 5 hours = GMT.
     There may be some glitches in the data, especially fluorometer data.
     Missing and invalid values appear as NaN (Not a Number).

(10) VARIABLE DESCRIPTION:
      
      VARIABLE  VARIABLE DESCRIPTION                      PRES/UNITS    CODED
      -------   --------------------                      ----------    -----

      DATE      date                                       mmddyyyy       N
      TIME      24 hour GMT (Greenwich Mean Time)          hhmmss         N
      STATION   station location (distance upriver)       0.01  km        Y
      LATD      latitude  (degrees North)                 1     deg       N
      LATM      latitude  (minutes North)                 0.01  min       N
      LOND      longitude (degrees West)                  1     deg       N
      LONM      longitude (minutes West)                  0.01  min       N
      COND      conductivity                              0.001 S/m       N
      SIG       sigma-t (density)                         0.001 kg/m^3    N
      SAL       salinity                                  0.001 PSU       N
      TEMP21    SBE-21 temperature (inside cabin)         0.001 deg C     N
      TEMP3     external SBE-03 temp sensor (at hull)     0.001 deg C     N
      NEPHEL    uncalibrated nephelometer fluorescence    0.01  volts     N
      FLCHL     uncalibrated chl a fluorescence           0.01  volts     N
      FLDOM     uncalibrated humic (DOM) fluorescence     0.01  qse(ppb)  N

(11) CALCULATIONS:

     STATION data were calculated from GPS positions using LMERmap (the GARLMER
     Project mapping and river distance calculation program for Matlab).
     Note: Station distances are calculated relative to the line of demarcation,
     and are synchronized to nominal 2km CTD station positions.

     SALINITY=PSS-78
     SIGMA-T=density(s,t,0)-1000
     Both salinity and sigma-t were computed by the Sea-Bird software program.
     The formulas used were obtained from "Algorithms for Computation of
     Fundamental Properties of Seawater" by N.P. Fofonoff and R.C. Millard Jr.;
     UNESCO Technical Papers in Marine Science #44, 1983.


(12) FOR MORE INFORMATION CONTACT:  Julie Amft
                                    Skidaway Institute of Oceanography
                                    10 Ocean Science Circle
                                    Savannah, GA 31411

(13) OTHER DATA FILES TO REFERENCE:

(14) REFERENCE CITATIONS: None

(15) FORMAT OF VARIABLES:

     FILENAME: 9607odsc.ogb

        Column #  Column Name  Type    Width  Decimals
        --------  -----------  ----    -----  --------
           1      DATE         date      9
           2      TIME         numeric   8
           3      STATION      numeric   7       2
           4      LATD         numeric   4       0
           5      LATM         numeric   6       2
           6      LOND         numeric   4       0
           7      LONM         numeric   6       2
           8      COND         numeric   8       3
           9      SIG          numeric   9       3
          10      SAL          numeric   9       3
          11      TEMP21       numeric   9       3
          12      TEMP3        numeric   9       3
          13      NEPHEL       numeric   7       2
          14      FLCHL        numeric   7       2
          15      FLDOM        numeric   9       2

(16) NUMBER OF RECORDS: 388 lines

(17) STATUS: Type 2

(18) FOR ARCHIVAL USE:
      Data File Validated By:  Julie Amft
      Date:  01 May 2000
      Date Entered To Database:  21 June 2000
      Log Of Changes And Comments: