Metadata Report for BODC Series Reference Number 47387
No Problem Report Found in the Database
Open Data supplied by Natural Environment Research Council (NERC)
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Teleost Pressure Recorder
This instrument was developed at I.O.S. Bidston. Each recorder consists of a Bell and Howell strain gauge or a Digiquartz pressure transducer. The strain gauge sensor uses a Bell and Howell type 4-306 transducer and operates as a phase shift oscillator whose frequency is controlled by the ratio of output to input voltage of the transducer Wheatstone bridge network. The quartz crystal pressure sensor consists of a convoluted bellows linked to a 40kHz quartz crystal resonator coupled by piezoelectric action to an electronic resonator.
The pressure and temperature recorder consists of an Aanderaa current meter type logger modified to accept input from a pressure sensor containing a Bell and Howell strain gauge or a Digiquartz pressure transducer and a platinum resistance thermometer.
The pressure and temperature transducers are mounted in the same heat sink for compatible data. The pressure sensors are mounted in a protective frame of dimensions 1.75m by 1.14m by 0.66m, attached to a ballast plate or frame. Teleost recorders are deployed as pop-up moorings and released from their ballast frames by firing a pyrotechnic release by acoustic command.
Data Processing Notes
Clock lost 17 seconds over 162 days 9 hours 15 minutes 17 seconds; the original cycle interval and time values have been corrected. This instrument was moved to a new position at 0707h 29 January 1983 which was evident by a datum shift in the data. The data before and after the change are of good quality. Instrumental drift was zero.
|Nominal sampling interval||900 seconds|
|Integration period||900 seconds|
|Actual sampling interval||15.000018 minutes|
IOS Data Processing of Off-Shore Pressure Recorder Data
Data processing consists of two stages:-
Pressures have been sample rate reduced from the basic time step of the recorder to produce the hourly values and have been interpolated by a cubic spline to generate the value on cardinal hours.
Instrumental drift has been removed and the drift free series is produced with an artificial mean value, usually of 100mbar.
Continental Slope Experiment (CONSLEX)
The Continental Slope Experiment (CONSLEX) was a collaborative exercise between the Institute of Oceanographic Sciences, Scottish Marine Biological Association, Department of Agriculture and Fisheries for Scotland and the Ministry of Agriculture, Fisheries and Food designed to study water movements across the Scottish continental slope.
The experiment ran from August/September 1982 to February/March 1983. The deployments, mainly current meter moorings, were made along a set of lines defined thus:
|Line||Position||Number of |
|P||51° 41' N,15° 26' W to 51° 41' N,14° 55' W||4|
|A||57° 18' N,09° 53' W to 57° 23' N,08° 30' W||9|
|B||58° 11' N,09° 57' W to 57° 57' N,08° 50' W||7|
|C||59° 11' N,07° 43' W to 59° 00' N,07° 22' W||6|
|D||59° 46' N,06° 16' W to 59° 37' N,05° 58' W||4|
|E||60° 31' N,05° 00' W to 60° 05' N,04° 29' W||5|
|F||61° 27' N,02° 13' W to 61° 08' N,01° 33' W||6|
|G||63° 07' N,00° 00' W to 61° 30' N,00° 00' W||6|
Bottom-mounted pressure gauges were deployed at either end of lines A-G and four temporary tide gauges were installed from Sligo (Eire) to Shetland. The current meter temperature sensors were supplemented by three thermistor chain deployments.
No Data Activity or Cruise Information held for the Series
No Fixed Station Information held for the Series
|<||Below detection limit|
|>||In excess of quoted value|
|A||Taxonomic flag for affinis (aff.)|
|B||Beginning of CTD Down/Up Cast|
|C||Taxonomic flag for confer (cf.)|
|E||End of CTD Down/Up Cast|
|G||Non-taxonomic biological characteristic uncertainty|
|I||Taxonomic flag for single species (sp.)|
|K||Improbable value - unknown quality control source|
|L||Improbable value - originator's quality control|
|M||Improbable value - BODC quality control|
|O||Improbable value - user quality control|
|0||no quality control|
|2||probably good value|
|3||probably bad value|
|6||value below detection|
|7||value in excess|
|A||value phenomenon uncertain|
|Q||value below limit of quantification|