platform_roll

complete
Created: July 25, 2018
Proposer: Nan Galbraith
Proposed Date: 2018-07-10
Change Date: July 25, 2018, 12:18 p.m.
Term: platform_roll_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, 12:23 p.m.
Term: platform_roll_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. "Roll" means rotation of the platform in the vertical plane about its longitudinal/X axis. The longitudinal/X axis, also known as the "roll axis", is an imaginary line running horizontally through the length of the platform and through its center of gravity. In roll motion, the platform tilts such that one side moves vertically upwards while the other moves vertically downwards, and vice versa. Platform roll angle is the angle between the local horizontal and the platform's lateral/Y axis. Zero roll angle means the lateral axis is horizontal. The usual sign convention is that roll angle is measured positive when the right hand edge of the platform (when viewing towards the orientation direction or "front" of the platform) is elevated above the horizontal, negative when it is below the horizontal.
Change Date: Oct. 2, 2018, 2:16 p.m.
Term: platform_roll
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
Roll is a rotation about an axis that is perpendicular to the local vertical axis and is coplanar with the nominal forward motion direction of the platform. Roll 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_roll should be chosen only if the sign convention of the data is unknown. For cases where the sign convention of the roll is known, a standard name of platform_roll_starboard_down or platform_roll_starboard_up 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.
Change Date: Oct. 3, 2018, 11:05 a.m.
Term: platform_roll
Unit: degree
Unit ref: UAAA
AMIP:
GRIB:
Roll is a rotation about an axis that is perpendicular to the local vertical axis and is coplanar with the nominal forward motion direction of the platform. Roll 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_roll should be chosen only if the sign convention of the data is unknown. For cases where the sign convention of the roll is known, a standard name of platform_roll_starboard_down or platform_roll_starboard_up 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.