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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--
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* Nan Galbraith (508) 289-2444 *
* Upper Ocean Processes Group Mail Stop 29 *
* Woods Hole Oceanographic Institution *
* Woods Hole, MA 02543 *
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Received on Tue Aug 30 2011 - 08:36:15 BST
