relative_platform_azimuth_angle

complete
Created: Oct. 3, 2018
Proposer: Alison Pamment
Proposed Date: 2018-10-03
Update description of 'platform'.
Change Date: Oct. 3, 2018, 4:48 p.m.
Term: relative_platform_azimuth_angle
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
Standard names for "platform" describe the motion and orientation of the vehicle from which observations are made. Platforms include, but are not limited to, satellites, aeroplanes, ships, instruments and buoys. The quantity with standard name relative_platform_azimuth_angle is the difference between the viewing geometries from two different platforms over the same observation target. It is the difference between the values of two quantities with standard name platform_azimuth_angle. There is no standardized sign convention for relative_platform_azimuth_angle. "Observation target" means a location on the Earth defined by the sensor performing the observations. A standard name also exists for relative_sensor_azimuth_angle. For some viewing geometries the sensor and the platform cannot be assumed to be close enough to neglect the difference in calculated azimuth angle.
Change Date: Oct. 3, 2018, 4:49 p.m.
Term: relative_platform_azimuth_angle
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
The quantity with standard name relative_platform_azimuth_angle is the difference between the viewing geometries from two different platforms over the same observation target. It is the difference between the values of two quantities with standard name platform_azimuth_angle. There is no standardized sign convention for relative_platform_azimuth_angle. "Observation target" means a location on the Earth defined by the sensor performing the observations. A standard name also exists for relative_sensor_azimuth_angle. For some viewing geometries the sensor and the platform cannot be assumed to be close enough to neglect the difference in calculated azimuth angle. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts.