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solar radio noise

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  • Radio astronomy — is a subfield of astronomy that studies celestial objects at radio frequencies. The field originated from the discovery that many astronomical objects emit radiation in the radio wavelengths as well as optical ones. The great advances in radio… …   Wikipedia

  • Solar cycle — The solar cycle, or the solar magnetic activity cycle, is the main source of periodic variation of all solar phenomena driving variations in space weather. [ [http://www7.nationalacademies.org/ssb/SSB Space weather97.pdf Space Weather: A Research …   Wikipedia

  • solar noise — noun : radio noise emitted by the sun and its atmosphere * * * solar noise noun A hissing background noise heard in radio communication, due to radiation from the sun and its atmosphere • • • Main Entry: ↑solar …   Useful english dictionary

  • radio and radar astronomy — Study of celestial bodies by measuring the energy they emit or reflect at radio wavelengths. It began in 1931 with Karl Jansky s discovery of radio waves from an extraterrestrial source. After 1945, huge dish antennas, improved receivers and data …   Universalium

  • Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …   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

  • Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …   Wikipedia

  • Solar transit — In astronomy, solar transit is when anything passes between the Sun and the Earth. This mainly includes the planets Mercury and Venus. A solar eclipse is also a solar transit of the Moon, but technically only if it does not cover the entire disc… …   Wikipedia

  • Solar micro-inverter — A solar micro inverter: the Enphase M190 in the process of being installed. The ground wire is attached to the lug and the panel s DC connections are attached to the cables on the lower right. The AC parallel trunk cable runs at the top (just… …   Wikipedia

  • Radio broadcasting — Long wave radio broadcasting station, Motala, Sweden …   Wikipedia

  • List of radio propagation topics — This is a list of radio propagation terms. NOTOC A a index A index aa index active prominence active prominence region (APR) active region active surge region (ASR) active dark filament (ADF) AE index Air Force Geophysics Laboratory (AFGL) arch… …   Wikipedia

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