All of the inshore surface moorings suffer from an issue called the 'top of the day problem.' A race condition exists in the CPM firmware when transferring daily log files harvested from the various sub-components in a buoy system (e.g. DCL16, CPM3, DCL35, etc) over the Iridium RUDICS connection. The primary CPM rsync's data files from the various sub-components to a central data directory. The first time a daily file is created/copied into that directory (usually shortly after midnight), a compressed copy of the file is created and that compressed file is queued up in a separate text file for transmission to shore. The transfer routine reads that text file and processes the files from that list in order from top to bottom. Once that compressed file is transferred to shore, no further updates for that file are sent to shore. Meanwhile, the CPM continues to rsync data from the different sub-components, updating the original daily log file. The net result is that data is accumulating in the daily log file for an instrument, but we may see only one record (or none) depending on when the rsync job occurred and the compressed file was created and staged for transfer to shore. This affects telemetered data only.

Id: 897 By: michaesm

Correcting the iridium data telemetry issues, permitting full telemetry of data files, resulting in greater power consumption than anticipated. Result is power level of the battery pack has dropped below operational limits and subsystems can no longer power instruments. Shutting the mooring down, and placing in a low power maintenance mode. 11 instruments offline.

Id: 898 By: michaesm
Flag: not_operational Exclude: No

The buoy main battery voltage is being drawn down faster than expected. Have shutdown further power to DCL17 and to the OPTAA on DCL16. This takes the following instruments offline:
DCL17
MOPAK
CTDBP (with attached FLORT)
VELPT
ACOMM
OPTAA
Have had to power off DCL17 and DCL16 and reduce call in frequency to 12 hours. Will still (at least should) receive data from MFN. Instruments affected are:
DCL17 (Buoy)
MOPAK
CTDBP3 (with FLORT)
VELPT1
UCSPP (aka ACOMM)
DCL16 (NSIF)
CTDBP1 (with DOSTA) (should internally log)
FLORT
PCO2W1 (should internally log)
PHSEN1 (should internally log)
OPTAA1
NUTNR (should internally log)
SPKIR
VELPT2 (should internally log)

Id: 899 By: michaesm

CAMDS not serviced by vendor in time for deployment

Id: 1236 By: michaesm
Flag: not_operational Exclude: No

The instrument operates on an internally controlled schedule. Due to an instability of the internal instrument clock as a function of temperature, the instrument's operating schedule will drift out of alignment with the limited window allowed by the datalogger schedule. The result is a loss of telemetered data. The instrument should continue to sample and record internally. Comparisons between the instrument clock and the datalogger clock (GPS based) while telemetry was active will permit characterization of the internal instrument clock offset and drift (generally fairly linear).

Id: 1738 By: wingardc
Flag: not_operational Exclude: No

Updated, 2020-05-24: Between 2019-10-17 and 2020-05-24, the clock on CPM3 was off by approximately 27 minutes. Communications between the buoy and the MFN were out of sync during this time period. The clock was automatically updated during routine operations on May 24, 2020 to the correct time, allowing communications and normal operations on the MFN to resume. *Communications to the seafloor sensors failed. Status of the instrumentation and data loggers is unknown. With the exception of the VEL3D and OPTAA, the sensors on the seafloor platform should continue to autonomously sample for the remainder of deployment. Until we recover and redeploy the mooring in the spring of 2020, no further telemetered data will be available from the seafloor sensors.

Id: 1759 By: wingardc
Flag: not_available Exclude: No

For reasons unknown, data from this instrument is not being telemetered at this time.

Id: 2204 By: wingardc
Flag: not_available Exclude: No