Audio subcarrier

A carrier used to modulate another carrier. Note: The modulated carrier can be used to modulate another carrier, and so on, so that there can be several levels of subcarriers, ...

subcarrier

Consumer electronics; Television

A carrier wave, itself modulated with intelligence, that is modulated onto another carrier.

subcarrier

Aerospace; Space flight

Modulation applied to a carrier which is itself modulated with information-carrying variations.

subcarrier

Aerospace; Satellites

A second signal "piggybacked" onto a main signal to carry additional information. In satellite television transmission, the video picture is transmitted over the main carrier. The ...

sun satellite

Aerospace; Satellites

British industry will lead the production of Solar Orbiter (SolO), a spacecraft that will travel closer to the Sun than any satellite to date. SolO will take pictures and ...

Kwangmyŏngsŏng-3

Aerospace; Satellites

Kwangmyŏngsŏng-3, meaning Bright Star-3, is a North Korean Earth observation satellite scheduled to be launched between 12-16 April 2012 to commemorate the centenary of the birth ...

near infrared (NIR)

Aerospace; Satellites

The preferred term for the shorter wavelengths in the infrared region (the entire infrared region extends from about 0.7 µm (visible red) to about 3 µm). The longer wavelength end ...

radiation

Aerospace; Satellites

The process by which electromagnetic energy is propagated through free space by virtue of joint undulatory variations in the electric and magnetic fields in space. This concept is ...

absorption

Aerospace; Satellites

The process by which electromagnetic radiation (EMR) is assimilated and converted into other forms of energy, primarily heat. Absorption takes place only on the EMR that enters a ...

enhancement

Aerospace; Satellites

The process of altering the appearance of an image so that the interpreter can extract more information. Some types of digital enhancements commonly applied to Landsat imagery ...