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a 1 week burst every 6 week
a 1 day burst every 6 days.
Any schedule with a duty cycle of 1 part in 6 will extend the deployment duration to 12
months. To determine the time scales of interest, you look at each schedule. The 1 month burst
every 6 months will not resolve seasonal variations, which are considered important. The 1 week
burst every 6 weeks is not quite adequate for tidal and diurnal events, though it comes close.
Resolution is limited here by the minimum duration of a single profile within a burst. A 1 day
burst with a 6 day burst interval would allow resolution of the spring-neap cycle, but would
expose the profiler to biofouling for a period of 5 days after every second burst. A schedule with
an even number of profiles in each burst makes good sense, but resolution of the spring-neap
cycle will be lost.
A schedule with 6 profiles (2 days) and a burst interval of 12 days is shown next.
Start 1| Countdown delay = 12:00:00 [HH:MM:SS]
Checking entries . . . done.
Evaluate the
schedule
1 million meters
of travel over 1
year
Schedule 2| Profile start interval = 000 08:00:00 [DDD HH:MM:SS]
3| Reference date/time = 04/10/2002 00:00:00
4| Burst interval = 012 00:00:00 [DDD HH:MM:SS]
5| Profiles per burst = 6
6| Paired profiles Disabled
Stops 7| Shallow pressure = 50.0 [dbar]
8| Deep pressure = 5500.0 [dbar]
9| Shallow error = 250.0 [dbar]
A| Deep error = 50.0 [dbar]
B| Profile time limit = 07:34:10 [HH:MM:SS]
C| Stop check interval = 30 [sec]
D| Done
Selection ? d
All entries are within allowed ranges.
Checking profile schedule . . . done.
Calculated minimum profile duration: 06:44:04
Profile schedule selections are consistent.
Checking burst schedule . . . done.
Calculated burst duration: 002 00:00:00
Burst schedule selections are consistent.
Estimated Profile 1 start time: 04/10/2002 00:00:00
Profiling distance will reach 1 million meters
on 04/09/2003 after 183 profiles.
Accept and store schedule selections (Yes/No) [Y] ? y
Figure C-22: Schedule with Six Profiles at 12 Day Intervals
This set of parameters satisfies the two most important requirements of the investigation.
The other requirements cannot be met at the proposed location using a single profiler for a one
year deployment. Tidal time scales could be resolved using multiple, synchronized MMP units,
Appendix C-23