Harbour porpoise surveys in the Blasket Islands SAC, 2014
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Téama | Timpeallacht |
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Dáta eisithe | 2022-07-06 |
Dáta nuashonraithe | 2023-11-20 |
Cloíonn an tacar sonraí leis na caighdeáin seo | The INSPIRE Directive or INSPIRE lays down a general framework for a Spatial Data Infrastructure (SDI) for the purposes of European Community environmental policies and policies or activities which may have an impact on the environment. |
Nótaí Cearta | {http://creativecommons.org/licenses/by/4.0/,"Copyright Government of Ireland. This dataset was created by National Parks and Wildlife Service, Department of Housing, Local Government and Heritage. This copyright material is licensed for re-use under the Creative Commons Attribution 4.0 International licence. http://creativecommons.org/licenses/by/4.0/",otherRestrictions} |
Minicíocht Nuashonraithe | Eile |
Teanga | English |
Clúdach Geografach i bhformáid GeoJSON | {"type":"Polygon","coordinates":[[[-10.650444030762, 50.807923689449],[-10.650444030762, 55.993470564449], [-5.289115905762, 55.993470564449], [-5.289115905762, 50.807923689449], [-10.650444030762, 50.807923689449]]]} |
SRS | WGS 84 (EPSG:4326) |
Méid Ingearach | {"verticalDomainName": "EPSG Projection 5731 - Malin Head height", "minVerticalExtent": "0", "maxVerticalExtent": "1014"} |
Eolas Dualfhoinse | As part of this survey a towed hydrophone array was deployed during visual surveys. This array consisted of a 200m-long cable with two hydrophone elements (HP-03) situated 25cm apart in a fluid-filled tube at the end of the cable. The cable and hydrophone array were connected to the vessel with a bungee cord to avoid excessive tension on the main line. The equipment is designed to be negatively buoyant in order to tow the hydrophone elements under the surface at a depth of 2-5m depending on the speed of the vessel. The cable contains wires that conduct power from the battery attached at the dry end (MAGREC Ltd HP-27st buffer box) to preamplifier's in the fluid-filled tube at the wet end of the array. The buffer box and an attached dedicated soundcard (National Instruments DAQ-6255) were linked into a laptop computer. The soundcard allows for the detection of sounds which lie outside the processing capability of the computer’s own soundcard. Two sound channels were sampled via the hydrophone array at a 250 kHz sampling rate. This allowed the detection and logging of acoustic encounters occurring within a 2-125 kHz frequency range. The open-source software PAMGUARD (ver.1.11.02 Beta) was used for on-board laptop-based data acquisition. PAMGUARD is a fusion of the IFAW suite and Ishmael acoustic detection and analysis software and it contains applications such as click detectors, tonal whistle detectors, a spectrogram viewer, in-built sound filters and the capability to calculate bearings on maps, to record a track log and several other functions. |
Tréimhse ama clúdaithe (tús) | 2014-07-01 |
Tréimhse ama clúdaithe (deireadh) | 2014-09-01 |