According to the transmissions, on Friday, June 10th, the SRVI1 CT was
connected sometime between 9:54am and 10:00am (Eastern Daylight Time).
This was perfect, as it gave us a full 10 measurement counts at the next
transmission hour (11am EDT). It is also okay to connect the CT
slightly earlier than this.
The CT was disconnected sometime between 12:36pm and 12:42pm (EDT).
This was about 20 minutes too early, as we only received 7 (of a
possible 10) measurement counts for that final, post-maintenance hour.
Ideally we want a full hour's worth of data prior to maintenance,
followed by an hour during which maintenance tasks may be performed,
followed by a full hour's worth of data following maintenance.
Note that the earlier maintenance trips on 4/13 and 5/18 were also
slightly off the preferred timing. The 4/13 trip had only 8 measurement
counts for the first hour, suggesting that the CT was connected about 12
minutes too late. The 5/18 trip had only 2 counts for the third hour,
suggesting that the CT was disconnected about 48 minutes too early. As
a reminder, preferred timing would be:
HOUR 1: Pre-Maintenance. Connect the CT no later than 4 minutes
before the hour, and preferably earlier. For example, attach the CT
at 9:45am for a full hour of measurements from 9:56am to 10:56am.
HOUR 2: Maintenance. The CT remains connected while station
maintenance tasks are performed. This work should start no earlier
than 4 minutes before the second hour and end no later than 4 minutes
before the third hour. For example, maintenace work could proceed
from 11am to 11:45am (ending no later than 11:56am).
HOUR 3: Post-Maintenance. The CT should remain connected until at
least 56 minutes into the third hour (4 minutes before Hour 4). For
example, the CT could be disconnected at 1pm (allowing a full hour's
worth of post-maintenance measurements from 11:56am to 12:56pm).
We now have four periods of data from the SRVI1 groundtruth CT. There
is the period on 3/15 during station upgrade and three periods of
station maintenance on 4/13, 5/18 and 6/10. I'm attaching data from
both the Groundtruth CT and the Permanent CTD for these periods:
CT for Groundtruthing CTD permanently Deployed
======================== ========================
Date Time Cond Temp Salt Cnt Cond Temp Salt Cnt
---------- ---- ----- ----- ----- --- ----- ----- ----- ---
03/15/2005 156 56.27 26.42 36.24 10 56.40 26.45 36.31 10
03/15/2005 256 56.22 26.38 36.24 10 56.35 26.41 36.31 10
03/15/2005 356 56.17 26.33 36.24 10 56.28 26.35 36.31 10
03/15/2005 456 56.04 26.21 36.24 10 56.16 26.23 36.31 10
03/15/2005 556 56.02 26.20 36.24 10 56.17 26.23 36.32 10
03/15/2005 656 56.05 26.22 36.24 10 56.20 26.25 36.33 10
03/15/2005 756 56.05 26.21 36.25 10 56.20 26.24 36.33 10
03/15/2005 856 55.99 26.16 36.24 10 56.14 26.19 36.33 10
03/15/2005 956 55.90 26.09 36.23 10 56.05 26.12 36.32 10
03/15/2005 1056 55.85 26.05 36.23 10 56.01 26.08 36.32 10
03/15/2005 1156 55.85 26.05 36.23 10 56.01 26.08 36.32 10
03/15/2005 1256 55.89 26.08 36.23 10 56.04 26.11 36.32 10
03/15/2005 1356 55.91 26.11 36.23 10 56.06 26.13 36.32 10
---------- ---- ----- ----- ----- --- ----- ----- ----- ---
04/13/2005 1456 57.05 27.22 36.18 8 57.72 27.60 36.36 10
04/13/2005 1556 57.37 27.64 36.08 10 57.80 27.66 36.37 10
04/13/2005 1656 57.51 27.75 36.10 10 57.93 27.77 36.38 10
04/13/2005 1756 57.65 27.86 36.11 4 58.05 27.86 36.39 10
---------- ---- ----- ----- ----- --- ----- ----- ----- ---
05/18/2005 1556 57.66 28.45 35.67 10 57.85 28.51 35.76 10
05/18/2005 1656 57.67 28.50 35.64 10 57.86 28.52 35.76 10
05/18/2005 1756 57.83 28.53 35.73 2 57.89 28.54 35.76 10
---------- ---- ----- ----- ----- --- ----- ----- ----- ---
06/10/2005 1456 58.27 28.81 35.82 10 58.27 28.86 35.79 10
06/10/2005 1556 58.33 28.86 35.83 10 58.30 28.88 35.79 10
06/10/2005 1656 58.25 28.88 35.76 7 58.25 28.91 35.73 10
I will also post this message to the SRVI1 blog.
regards,
Mike J+--
Mike Jankulak, Research Associate, University of Miami / CIMAS
NOAA / Atlantic Oceanographic Meteorological Laboratory
4301 Rickenbacker Causeway, Miami, FL 33149 -- 305-361-4543
This site is for providing Salt River ICON/CREWS field maintenance records for NOAA/AOML/ICON data management purposes. Please update this blog whenever new operations are performed in the field, so that AOML can coordinate their efforts with the Salt River ICON/CREWS field efforts.