(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: