Handbook of best practices

coefficients and geo referencing parameters (i.e., platform ephemeris) computed and
appended, but not applied to Level 0 data.
Level 1B. Radiometrically corrected and geolocated Level 1A data that have been processed
to sensor units.
Level 2. Derived geophysical parameters at the same resolution and location as the Level 1
data.
Level 3. Geophysical parameters that have been spatially and/or temporally re-sampled (i.e.,
derived from Level 1 or Level 2 data).
Level 4. Model output and/or results of lower level data that are not directly derived by the
instruments.
Profile
One vertical transit by the profiler between its end points (i.e., a round trip is two profiles)
Profiler
A platform (profiler body) containing a suite of instruments and sensors that are raised and
lowered through the water column on a regular basis.
Protocol
A well-defined exchange of tokens (words, packets, etc.) allowing two or more peers to
communicate.
Publish
Make something generally known; present something in a format for others to assimilate.
Publish/Subscribe
An asynchronous messaging paradigm where senders (publishers) of messages are not
programmed to send their messages to specific receivers (subscribers). Instead, published
messages are characterized into classes without knowledge of what (if any) subscribers
there may be. Subscribers express interest in one or more classes, and only receive
messages that are of interest, without knowledge of what (if any) publishers there are. This
decoupling of publishers and subscribers provides greater scalability and a more dynamic
network topology.
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