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[CF-metadata] point observation data in CF 1.4

From: Ute Brönner <Ute.Broenner>
Date: Tue, 5 Oct 2010 13:02:52 +0200

Hei from Norway,

I want to write data observed at different points at different time steps in netCDF with CF1.4. I read something in chapter 9 but was told that this isn't convention, yet.
I have a unknown amount of timesteps and per timestep a different amount of observation data.
As an example I have
time =
  {0.0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, 2.5, 2.75}
number_records_per_timestep =
  {0, 24, 48, 65, 74, 97, 83, 52, 43, 66, 63, 71}
 and tried

dimensions:
   time = UNLIMITED; // (12 currently)
 variables:
   double time(time=12);
     :long_name = "forecast time after simulation start";
     :standard_name = "forecast_reference_time";
     :units = "days since 2010-05-25";
     :calendar = "gregorian";
   int number_records_per_timestep(time=12);
     :units = "1";
     :long_name = "number spillets per current timestep";
     :CF:ragged_row_count = "time";
   float latitude(time=12);
     :long_name = "spillet latitude";
     :standard_name = "latitude";
     :units = "degrees_north";
   float longitude(time=12);
     :long_name = "spillet longitude";
     :standard_name = "longitude";
     :units = "degrees_east";
   float radius_of_droplet_cloud_on_sea_surface(time=12);
     :long_name = "spillet radius";
     :standard_name = "effective_radius_of_convective_cloud_liquid_water_particle";
     :units = "m";
     :_FillValue = NaNf; // float
     :coordinates = "time latitude longitude";

but I have some trouble in writing the data.
Can you help?

Best regards,
Ute

Ute Br?nner

SINTEF Materials & Chemistry
Department of Marine Environmental Technology

Direct phone (+47) 998 98 987
Visiting: Bratt?rkaia 17C
Post: Postbox 4760 Sluppen, N-7465 Trondheim

www.sintef.com/marine_environment<http://www.sintef.com/marine_environment>

* Consider the environment before printing
Received on Tue Oct 05 2010 - 05:02:52 BST

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