These look good, and are certainly needed.
Just one question about the last line of each of the definitions,
referring to the 3D platform velocity. On ships, there's often only
a 2D vector, I suppose the vertical velocity is presumed to be 0.
Would it be preferable to not specifically mention 3D, and just say
"the eastward (or northward/vertical) component of the platform
velocity vector" to make this "fit" 2D ship tracks as well?
Thanks - Nan
On 8/30/11 10:12 AM, Bruno PIGUET wrote:
Dear all,
I would like to request the creation of new standard names for the
local geographic components of the platform_speed_wrt_ground.
Following the already existing definition of speed, velocity, and the
naming scheme for the wind component (eastward_wind, northward_wind,
upward_air_velocity), I propose :
- platform_northward_velocity_wrt_ground
"wrt" means with respect to. Standard names for platform describe the
motion and orientation of the vehicle from which observations are made
e.g. aeroplane or ship. A velocity is a vector quantity. The platform
velocity with respect to ground is relative to the solid Earth beneath
it i.e. the sea floor for a ship. It is often called the "ground speed"
of the platform. "Northward" indicates a vector component which is
positive when directed northward (negative southward).
Platform_northward_velocity_wrt_ground is the northward component of the
3D platform velocity vector.
- platform_eastward_velocity_wrt_ground
"wrt" means with respect to. Standard names for platform describe the
motion and orientation of the vehicle from which observations are made
e.g. aeroplane or ship. A velocity is a vector quantity. The platform
velocity with respect to ground is relative to the solid Earth beneath
it i.e. the sea floor for a ship. It is often called the "ground speed"
of the platform. "Eastward" indicates a vector component which is
positive when directed eastward (negative westward).
Platform_upward_velocity_wrt_ground is the eastward component of the 3D
platform velocity vector.
- platform_upward_velocity_wrt_ground
"wrt" means with respect to. Standard names for platform describe the
motion and orientation of the vehicle from which observations are made
e.g. aeroplane or ship. A velocity is a vector quantity. The platform
velocity with respect to ground is relative to the solid Earth beneath
it i.e. the sea floor for a ship. It is often called the "ground speed"
of the platform. "Upward" indicates a vector component which is positive
when directed upward (negative downward).
Platform_upward_velocity_wrt_ground is the vertical component of the 3D
platform velocity vector.
Bruno.
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