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griddap Subset tabledap Make A Graph wms files Accessible Title Summary ISO 19115 Info Background Info RSS Email Institution Dataset ID
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_715512 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_715512.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_715512/ public Acoustic backscatter from sites in McMurdo Sound from 2014-2015 (McMurdo Predator Prey project) Krill and fish were sampled acoustically and visually beneath the fast ice\nusing the tethered SCINI ROV, which was deployed and operated through a 25 cm\ndiameter hole drilled through the sea ice. SCINI contained cameras and\nthrusters, and towed a sensor package consisting of a WET Labs fluorometer\n(ECO-AFL/FL) and a single-beam Biosonics 120 kHz DT-X echosounder. Visual\ntargets were identified to the lowest taxon possible; these observations were\nused primarily to verify classification of acoustic signals. The echosounder\noperated at a nominal ping rate of 1 ping s-1; however, this rate was\noccasionally adjusted if false bottom signals were observed. The general\nprofile of a dive included a surface transect of ~300 m horizontal distance,\nwhere the acoustic transducer faced downward, and also a dive to ~120 m if\nconditions allowed. Echogram data were saved to a depth of 500 m, and\nbackground noise was removed. Given the effective range of the transducer of\napproximately 100 m (resolving -80 dB targets), surveys characterized the\nupper 200 m of the water column.\n\ncdm_data_type = Other\nVARIABLES:\nsite (unitless)\nsitenum (unitless)\ndatetime (unitless)\nGroup (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\ndn (days)\nsv_linear_sum (m^-1)\nn (unitless)\neffort (unitess)\nsv_mean (decibel at reference level 1 meter (dB re 1 m-1))\ndepth (m)\nsv_mean_effort (decibel at reference level 1 meter (dB re 1 m-1))\n https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_715512_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_715512/index.htmlTable https://www.bco-dmo.org/dataset/715512 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_715512.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_715512&showErrors=false&email= BCO-DMO bcodmo_dataset_715512

 
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