|
Calibrations of specifics floats:
1901620
A float off Namibia in the South Atlantic, reasonably well behaved,
235 profiles until just about a year ago (2019-01-22):
argo.whoi.edu/wmo/1901620
The calibration shows good-size fluctuations.
Also, as is often the case for this TS shape, the cal levels include a good number
of fairly shallow ones.
first cal: pdf
and and _plus.pdf
I increase the depth "gently" by setting use_pres_gt=650
Now the fluctuations towards the end changed into a distinct drop.
deeper cal: pdf
and _plus.pdf
Just for kicks, I insert a breakpoint near the change (breaks=190),
but the resulting steep slope there seems unrealistic. If any adjustment,
I would think of a bias through the mean of that last drop. Cond cells can
show jumps like that.
add break=190: .pdf
and _cal.pdf
1901678
This is one of Sachiko's floats that I did by accident.
It starts of between Madagaskar and Mozambique, then heads south to the Cape
and keeps going southward.
argo.whoi.edu/wmo/1901678
An amazing TS with lots of influences.
Not surprisingly, the first cal had lots of fluctuations with amazing amplitude values.
first cal: pdf
and _plus.pdf
Again, I increase the depth "gently" by setting use_pres_gt=650
The cal curve looks different, but again it basically is just all over the place
without clear trends.
deeper cal: pdf
and _plus.pdf
I am guessing no cal correction, but given the magnitudes here I wanted to check.
1901659
Basically a float that "did not work":
argo.whoi.edu/wmo/1901659
It has only one profile down to 90 dbar, and has no position info (though the launch info
exists: lat=-35.5412, lon=4.9839).
We could convert it into a D file without cal, and substitute the launch position.
Or would could ask to have it removed from the GDAC.
This test case could give me a feel for what route to take in similar cases.
|
