platform_view_angle

complete
Created: Oct. 3, 2018
Proposer: Alison Pamment
Proposed Date: 2018-10-03
Update description of 'platform'.
Change Date: Oct. 3, 2018, 4:43 p.m.
Term: platform_view_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. Platform view angle is the angle between the line of sight from the platform and the direction straight vertically down. Zero view angle means looking directly beneath the platform. There is no standardized sign convention for platform_view_angle. A standard name also exists for sensor_view_angle. For some viewing geometries the sensor and the platform cannot be assumed to be close enough to neglect the difference in calculated view angle.
Change Date: Oct. 3, 2018, 4:45 p.m.
Term: platform_view_angle
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
Platform view angle is the angle between the line of sight from the platform and the direction straight vertically down. Zero view angle means looking directly beneath the platform. There is no standardized sign convention for platform_view_angle. A standard name also exists for sensor_view_angle. For some viewing geometries the sensor and the platform cannot be assumed to be close enough to neglect the difference in calculated view 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.