sensing frequency

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• Frequency domain sensor — Frequency domain (FD) sensor is an instrument developed for measuring soil moisture content. The instrument has an oscillating circuit, the sensing part of the sensor is embedded in the soil, and the operating frequency will depend on the value… …   Wikipedia

• Distributed temperature sensing — systems (DTS) are optoelectronic devices which measure temperatures by means of optical fibres functioning as linear sensors. Temperatures are recorded along the optical sensor cable, thus not at points, but as a continuous profile. A high… …   Wikipedia

• Remote sensing — There are two kinds of remote sensing. Passive sensors detect natural energy (radiation) that is emitted or reflected by the object or surrounding area being observed. Reflected sunlight is the most common source of radiation measured by passive… …   Wikipedia

• Extremely high frequency — Frequency range 30 to 300 GHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 …   Wikipedia

• Demand sensing — is a next generation forecasting method that leverages new mathematical techniques and near real time information to create an accurate forecast of demand, based on the current realities of the supply chain. The typical performance of demand… …   Wikipedia

• Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …   Wikipedia

• Dynamic frequency hopping — One of the key challenges of the cognitive radio based wireless networks, such as IEEE 802.22 wireless regional area networks (WRAN)[1], is to address two apparently conflicting requirements: assuring Quality of Services (QoS) satisfaction for… …   Wikipedia

• Collocation (remote sensing) — Collocation is a procedure used in remote sensing to match measurements from two or more different instruments. This is done for two main reasons: for validation purposes when comparing measurements of the same variable, and to relate… …   Wikipedia

• High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project …   Wikipedia

• Orthogonal frequency-division multiple access — Multiplex techniques Circuit mode (constant bandwidth) TDM · FDM · SDM Polarization multiplexing Spatial multiplexing (MIMO) …   Wikipedia

• European Remote-Sensing Satellite — (ERS) was the European Space Agency s first Earth observing satellite. It was launched on July 17, 1991 into a Sun synchronous polar orbit at a height of 782 ndash;785 km.InstrumentsERS 1 carried an array of earth observation instruments that… …   Wikipedia