@prefix skos: . skos:changeNote """2019-02-15 16:19:18.0 [mmorahan] insert WeightedRelation (id: null related concept uuid: 02c85d04-228e-4bf3-bb03-d72c22681dff relationship type: null relationship value: null generated by: null); insert WeightedRelation (id: null related concept uuid: affbd015-9373-4413-b76f-e91d01c4f5e3 relationship type: null relationship value: null generated by: null); """ ; skos:definition """In addition to a SAR, each ERS satellite also carries a Wind Scatterometer as part of its Active Microwave Instrument (AMI). The primary objective of wind scatterometers is to measure radar backscattering from ocean surface waves, from which wind velocity and direction can be estimated. However, scatterometers also collect data over land as well. Like the ERS SAR instruments, the ERS Wind Scatterometers operate at C-band (5.3 GHz) and VV polarization (vertically sent and received radar pulses). However, they operate over a much greater range of incident angle (18-57? as opposed to 23? for ERS SAR), have a wider illuminated swath width (500 km as opposed to 100 km), much coarser resolution (50 km, with a processed pixel spacing of 25 km) and more frequent coverage (near-daily at Arctic latitudes as opposed to 35 days for ERS SAR). Wind scatterometers therefore allow frequent radar imaging over large areas but with coarser spatial resolution than can be achieved with SAR. [Source: University of California-Los Angeles]"""@en ; skos:prefLabel "ERS WIND SCATTEROMETER"@en ; skos:inScheme ; skos:broader ; a skos:Concept . skos:prefLabel "Scatterometers"@en ; a skos:Concept ; skos:narrower .