platform_yaw

complete
Created: July 25, 2018
Proposer: Nan Galbraith
Proposed Date: 2018-07-10
Change Date: July 25, 2018, 12:28 p.m.
Term: platform_yaw_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 e.g. aeroplane, ship or satellite.
Change Date: July 25, 2018, 12:48 p.m.
Term: platform_yaw_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. "Yaw" means rotation of the platform in the horizontal plane about its vertical/Z axis. The vertical/Z axis, also known as the "yaw axis", is an imaginary line running vertically through the platform and through its center of gravity. In yaw motion, the platform rotates clockwise or counter clockwise in the horizontal, relative to its orientation, which has the standard name platform_orientation. Platform yaw angle is the angle between the platform's longitudinal/X axis and its orientation, which has the standard name platform_orientation. Zero yaw angle means the longitudinal axis is aligned with the direction of platform_orientation. The usual sign convention is that yaw angle is measured positive when the front or leading edge of the platform is rotated clockwise from its orientation.
Change Date: July 25, 2018, 4:32 p.m.
Term: platform_yaw_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. "Yaw" means rotation of the platform in the horizontal plane about its vertical/Z axis. The vertical/Z axis, also known as the "yaw axis", is an imaginary line running vertically through the platform and through its center of gravity. In yaw motion, the platform rotates clockwise or counter clockwise in the horizontal, relative to its orientation, which has the standard name platform_orientation. Platform yaw angle is the angle at a given instant between the platform's longitudinal/X axis and the position of that axis with high frequency variations (e.g. the effect of surface waves on a ship) removed. Zero yaw angle means the longitudinal axis is aligned with the platform_orientation. The usual sign convention is that yaw angle is measured positive when the front or leading edge of the platform is rotated clockwise from the platform_orientation.
Change Date: Oct. 3, 2018, 1:05 p.m.
Term: platform_yaw
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
Change Date: Oct. 3, 2018, 1:06 p.m.
Term: platform_yaw
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
Yaw is a rotation about the local vertical axis. Yaw is relative to the "at rest" rotation of the platform with respect to the axis of rotation. The "at rest" rotation of the platform may change over time. The standard name platform_yaw should be chosen only if the sign convention of the data is unknown. For cases where the sign convention of the yaw is known, a standard name of platform_yaw_fore_starboard or platform_yaw_fore_port should be chosen, as appropriate. 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.