Data Parameters

Here is the list of parameters and their estimated sizes that need to be considered in computing the data telemetry needs for the LENA system.

From Ship to Shore

Shipboard Science
Description Format Estimated record size (bytes)¹
wind speed/direction %6.2f %6.2
%5.1f %5.1f
%5.1f %6.1f
%6.1ff %6.1f
55
barometric pressure %7.2f 17
humidity %8.3f %8.3f 26
air temperature ² %7.3f %5u
%5u %5u
32
short wave radiation (visible) %7.1f 17
long wave radiation (IR) %7.1f %7.1f
%7.1f %7.1f
38
precipitation %7.1f 17
sea surface temperature %7.3f %5u
%5u %5u
32
ships position (GPS) ² %8.4f %9.4f 27
date/time of observation (utc only)² %2u %2u %4u %6.124
ship heading (compass bearing) ² %3u 13
Totals:
298 bytes/minute
17,880 bytes/hour

 

Shipboard Vessel Operation/System Status
Description Format Estimated record size (bytes)¹
Bilge water level? ² Flag or value? 15
Engine Temperature? ² Flag or value? 15
Engine RPM? ² Flag or value? 15
Inputs from onboard alarms/alerts? ² Flag or value? 15
What else? ² tbd tbd
Totals:
60 bytes/minute
3,600 bytes/hour

 

Trawl Net/Subsurface
Description Format Estimated record size (bytes)¹
pressure ² %7.2f 17
temperature ² %7.3f %5u
%5u %5u
32
Totals:
49 bytes/minute
2,940 bytes/hour

 

Fish Catch Information
Description Format Estimated record size (bytes)¹
This needs to be defined² Muli-line ASCII text 350 (5 x 70)
Totals:
350 bytes/message
1,400 bytes/day

 

E-Mail
Description Format Estimated record size (bytes)¹
Message² Muli-line ASCII text 1400 (20 x 70)
Totals:
1,400 bytes/message
2,800 bytes/day

 

From Shore to Ship

E-Mail
Description Format Estimated record size (bytes)¹
Message² Muli-line ASCII text 1400 (20 x 70)
Totals:
1,400 bytes/message
2,800 bytes/day

 

Images
Description Format Estimated record size (bytes)¹
Seasurface Temperature² GIF 2000-60000³
Currents² GIF 2000-60000³
Ocean Color² GIF 2000-60000³
Position of fronts, eddies² GIF 2000-60000³
Sea State/wave heights² GIF 2000-60000³
Totals:
2,000-60,000 bytes/image
4,000-120,000 bytes/day

¹ Assumes 10 bytes for record identification and record termination
² Estimated values
³ Depends on complexity of image


Contributed by: R. Groman
Last modified: June 30, 1998