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Loggerhead Sea Turtle (Caretta caretta) Satellite Data 2002
Interpreting Loggerhead Data Results
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Where are the turtles? Maps and Data
Data: Loggerhead Turtle (Caretta caretta) Data Tables
Maps: Track the Loggerhead Turtles
Trackmap of "Johanna" 19575
Trackmap of "Mary Lee" 02226Maps to download and place your fixes of the movements.
Map - Blank (color)
Map - Blank (black and white)
Map (color)
Background Information and Loggerhead Links:
Gray's Reef National Marine Sanctuary, Georgia.
NMFS Loggerhead Turtle Page
NMFS Recovery Plan
Loggerhead Page, Turtle Watch Program, North Carolina
Turtle Page from Nova Scotia Museum of Natural History
Satellite Tools, Resources, and Tracking Maps
Data Analysis Tools
What is GMT (Greenwich Mean Time)?
Map Generator
Distance generator from any two points
Click here for Sea Surface Temperature Satellite Images
HOW to Interpret the Satellite Data
You can access loggerhead turtle data sets at
http://whale.wheelock.edu/archives.
Sort by thread or subject to group all similar data categories, then look for "Data turtles (date)".(The following is the actual data that was sent by argos July 10 by e-mail)
01628 15247 4 12 J 2 1997-07-09 07:29:58 32.787 280.233 0.000 401650108
1997-07-09 07:33:35 4 242 00 00 00
00 00 00 00
157 227 06 32 01628 15247 22 12 J 0 1997-07-09 09:10:08 32.704 280.190 0.000 401650108
1997-07-09 09:06:20 1 242 00 00 00
00 08 00 04
146 75 36 178
1997-07-09 09:07:01 1 242 00 00 08
137 222 03 13 67 96 167 170
These are the results of three satellite passes although only two actually have location points.
How to read the data
01628 15247 4 12 J 2 1997-07-09 07:29:58 32.787 280.233 0.000 401650108
1997-07-09 07:33:35 4 242 00 00 00
00 00 00 00
157 227 06 32
Data Key 01628 program number 15247 transmitter ID number 4 number of lines of results in satellite pass 12 number of sensors J name of satellite, here NOAA-J 2 location class 1997-07-09 date of location obtained during the pass 07:29:58 time in UTC (currently -4 hours) 32.787 transmitter latitude in degrees and thousandths of a degree 280.233 transmitter longitude in degrees and thousandths
of a degree, eastward from 000.000 transmitter altitude in km 401650108 calculated transmit frequency 1997-07-09 date of data collection 07:33:35 time-code of data collection, in UTC 4 number of identical messages received 242 bin1 sensor(0-1.5m) 00 bin2 sensor(1.5-4.5m) 00 bin3 sensor(4.5-7.6m) 00 bin4 sensor(7.6-10.7m) 00 bin5 sensor(10.7-19.9m) 00 bin6 sensor(19.9-29.1m) 00 bin7 sensor(29.1-38.4m) 00 bin8 sensor(38.4-205.5m) 157 temperature bin 227 number of dives 06 average dive time 32 max. dive time
Each transmitter has its own calibrated temperature chart. See the individual Software Reports for the corresponding system number and ID code.
The 8 sensor bins collect data as programmed in each transmitter (see software report). The pressure transducer has a 10 second interval and a 34 scaling factor. For example for bin1 242: 242*10 sec. *34= 82280 sec or 1371.33 min. or 22.8555 hours. This means that within a 24 hour period this particular turtle spent 22.8555 hours on bin1 depth which is 0-1.5m. Note: these are very small ranges for these sensors and there can be a +/-2m error.
Temperature reading: just follow the calibrated charts for each transmitter
Number of dives: 227 * 2 (scaling factor see software report)
Average Dive Time: 06 * 30 (scaling factor)=180 sec = 3 min.
Max. Dive Time: 32* 60 (scaling factor)= 1920 sec. = 32 min.
Add Bin1-Bin8 to get a total time spent underwater in 24 hrs. ( make sure to *10sec*34scaling factor).
Initial Loggerhead Turtle Data Table Many more data sets are available in the WhaleNet Data listserv at http://whale.wheelock.edu/archives. Sort by thread to group all similar data categories.
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