@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . rdf:type skos:Concept ; dce:identifier "SDN:L22::TOOL1805" ; dc:date "2022-05-31 13:05:56.0" ; dc:identifier "SDN:L22::TOOL1805" ; pav:authoredOn "2022-05-31 13:05:56.0" ; pav:hasCurrentVersion ; pav:version "1" ; void:inDataset ; owl:deprecated "false" ; owl:versionInfo "1" ; skos:altLabel "RBR Quartz 3 APT" , "RBR Quartz 3 APT"@en ; skos:broader , , ; skos:definition "A combined triaxial quartz accelerometer and bottom pressure recorder for deep-sea early earthquake warning and tsunami monitoring. Designed for autonomous installation or real-time cabled observatories with ethernet connectivity, it penetrates sea bed sediments and has good seismic coupling. The outputs are the periods of the three accelerometer axes (ps), pressure (dbar), and temperature (degC). The instrument uses a 24 Wh battery and internal memory, with the capacity to stream in real-time. It has an integrated Digiquartz pressure sensor and temperature sensor, and is housed in titanium. The sampling period goes up to 16 Hz (up to 240M readings). The communication is via TCP/IP over Ethernet. Clock drift is +/-60 seconds/year. The accelerometer's range is +/- 3 g and its resolution is <100 ng. Depth is rated to 7,000 m. Depth resolution is 10 ppb and depth accuracy is +/- 0.01 % FS. Temperature accuracy is +/-0.002 degC."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL1805" ; skos:note "accepted"@en ; skos:prefLabel "RBR Quartz 3 APT Accelerometer and Bottom Pressure Recorder"@en ; skos:related , .