This section has been superseded by the treatment of trajectories as a type of discrete sampling geometry in Chapter 9.

A possible representation of the spatiotemporal locations of measurements along a flight path is to use time to parameterize the trajectory and use auxiliary coordinate variables to provide the spatial locations.

Example 5.5. Trajectories


dimensions:
  time = 1000 ;
variables:
  float O3(time) ;
    O3:long_name = "ozone concentration" ;
    O3:units = "1e-9" ;
    O3:coordinates = "lon lat z" ;
  double time(time) ;
    time:long_name = "time" ;
    time:units = "days since 1970-01-01 00:00:00" ;
  float lon(time) ;
    lon:long_name = "longitude" ;
    lon:units = "degrees_east" ;
  float lat(time) ;
    lat:long_name = "latitude" ;
    lat:units = "degrees_north" ;
  float z(time) ;
    z:long_name = "height above mean sea level" ;
    z:units = "km" ;
    z:positive = "up" ;
      

O3(n) is associated with the coordinate values time(n), z(n), lat(n), and lon(n).