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  2. Side looking airborne radar - Wikipedia

    en.wikipedia.org/wiki/Side_looking_airborne_radar

    The radar "looks" with the looking angle θ (or so called off-nadir angle). The angle α between x-axis and the line of sight (LOS) is called cone angle, the angle φ between the x-axis and the projection of the line of sight to the (x; y)-plane is called azimuth angle. Cone- and azimuth angle are related by cosα = cosφ ∙ cosε.

  3. Nadir - Wikipedia

    en.wikipedia.org/wiki/Nadir

    Nadir also refers to the downward-facing viewing geometry of an orbiting satellite, [2] such as is employed during remote sensing of the atmosphere, as well as when an astronaut faces the Earth while performing a spacewalk. A nadir image is a satellite image or aerial photo of the Earth taken vertically.

  4. Aerial survey - Wikipedia

    en.wikipedia.org/wiki/Aerial_survey

    the clockwise horizontal angle measured about the ground nadir point from the ground survey North meridian in the plane of photograph. orthomosaic A high-resolution map created by orthophotos, usually via drones is termed as an orthomosaic. Ortho meaning a nadir image and mosaic meaning a collection of images. Temporal Resolution Time between ...

  5. Advanced Spaceborne Thermal Emission and Reflection ...

    en.wikipedia.org/wiki/Advanced_Spaceborne...

    ASTER false-colour satellite image of 2010 eruption of Mount Merapi, ... Nadir Visible green/yellow B2 VNIR_Band2 0.630 - 0.690 15 Nadir Visible red B3N

  6. Advanced Technology Microwave Sounder - Wikipedia

    en.wikipedia.org/wiki/Advanced_Technology...

    The radiometer's antenna scans underneath the satellite through nadir, and its polarization vector rotates with the scan angle. [1] The sampling rate satisfies the Nyquist criterion for channels 1-16; thus, images produced from the data are not aliased. [ 1 ]

  7. Space-based radar - Wikipedia

    en.wikipedia.org/wiki/Space-based_radar

    ORS-2. Space-based radar or spaceborne radar is a radar operating in outer space; orbiting radar is a radar in orbit and Earth orbiting radar is a radar in geocentric orbit.A number of Earth-observing satellites, such as RADARSAT, have employed synthetic aperture radar (SAR) to obtain terrain and land-cover information about the Earth.