platform_heave_down

complete
Created: Oct. 3, 2018
Proposer: Jim Biard
Proposed Date: 2018-09-12
Change Date: Oct. 3, 2018, 4:17 p.m.
Term: platform_heave_down
Unit: m
Unit ref: ULAA
AMIP:
GRIB:
Change Date: Oct. 3, 2018, 4:17 p.m.
Term: platform_heave_down
Unit: m
Unit ref: ULAA
AMIP:
GRIB:
Heave is a displacement along the local vertical axis. Heave is relative to the "at rest" position of the platform with respect to the axis of displacement. The "at rest" position of the platform may change over time. "Down" indicates that positive values of heave represent the platform moving down as viewed by an observer on top of the platform facing forward. The standard name platform_heave_up should be used for data having the opposite sign convention. The standard name platform_heave should be chosen only if the sign convention of the data is unknown. 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.