Where does the wave data
One of the primary instruments CDIP uses to measure wave
height, wave period, wave direction and sea surface temperature is the
Datawell Directional Buoy. These instruments are approximately 3 ft round
and weigh 400 lbs. They are tethered to the bottom with a mooring
line and anchored with 1200 lbs of ballast chain.
Data is transmitted from an offshore buoy via a VHF antenna. The
receiving station is onshore, usually mounted in a lifeguard tower or
Coast Guard station. The data acquisiton platform is a Sun Ultra 5.
The data from the buoy is gathered and archived on the Sun and
every 30 minutes it is transferred back to a central computer
at Scripps for processsing. The data, which undergoes numerous data quality
control checks, is then distributed via the World Wide Web at
http://cdip.ucsd.edu and sent to the National Weather Service for
broadcast on their marine weather channel.
The buoy deployment barge is a modified Boston Whaler. This vessel is
used for local deployment/recovery. Periodically it is necessary to dive
on the buoy or mooring for general maintainence.
A. CDIP divers
C. Datawell Directional Buoy
B. Buoy deployment barge