**Title:** Add standard names for angular coordinates **Moderator:** TBD **Moderator Status Review [last updated: YY/MM/DD]:** Pending **Requirement Summary:** As discussed in #230 new standard names are needed for encoding angular coordinates. **Technical Proposal Summary:** Add 2 new standard names to be adopted in conjunction with the changes discussed in #230 **Benefits:** Users of angular coordinates, particularly geostationary imagery **Status Quo:** This is discussed in #230. The `standard_name`s currently in use have canonical names that do not fulfil the needs of geostationary imagery. **Detailed Proposal:** Add the following `standard_name`s:
| Name | Canonical units | Definition | | ---- | --------------- | -----------| | projection_x_angular_coordinate | radian | "x" indicates a vector component along the grid x-axis, when this is not true longitude, positive with increasing x. Angular projection coordinates are angular distances in the x- and y-directions on a plane onto which the surface of the Earth has been projected according to a map projection. The relationship between the angular projection coordinates and latitude and longitude is described by the grid_mapping. | | projection_y_angular_coordinate | radian | "y" indicates a vector component along the grid y-axis, when this is not true latitude, positive with increasing y. Angular projection coordinates are angular distances in the x- and y-directions on a plane onto which the surface of the Earth has been projected according to a map projection. The relationship between the angular projection coordinates and latitude and longitude is described by the grid_mapping. | A known use case is in the [geostationary projection](http://cfconventions.org/cf-conventions/cf-conventions.html#_geostationary_projection). -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/cf-convention/cf-conventions/issues/231 This list forwards relevant notifications from Github. It is distinct from [email protected], although if you do nothing, a subscription to the UCAR list will result in a subscription to this list. To unsubscribe from this list only, send a message to [email protected].
