Dear Maarten and Jonathan, Maarten has reminded me that the following names were discussed a few weeks ago:
- platform_zenith_angle (degree): "Platform zenith angle is the the angle between the line of sight to the platform and the local vertical"; - angle_of_rotation_from_solar_azimuth_to_platform_azimuth (degree): "The angle of rotation between the solar azimuth angle and the platform azimuth angle"; - thickness_of_liquid_water_cloud (m): "Cloud thickness (cloud top height minus cloud base)"; - effective_radius_of_cloud_condensed_water_particles_at_cloud_top (m): "Particle effective radius for both liquid and ice water particles"; - thermodynamic_phase_of_cloud_water_particles_at_cloud_top (status_flag liquid, ice and mixed): "The thermodynamic phase of particles at the top of the cloud"; - thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_infrared_radiance (status_flag liquid, ice and mixed): "The thermodynamic phase of particles at the top of the cloud derived by using infrared radiances"; - thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_near_infrared_radiance (status_flag liquid, ice and mixed):" The thermodynamic phase of particles at the top of the cloud derived by using near-infrared radiances". I think these names all follow the pattern of existing names and their meanings are generally clear. One question - in your products, are 'infrared' and 'near_infrared' separate ranges of wavelengths/frequencies? Please could you tell me the ranges so that I can include at least indicative values in the explanations of the names. For the three status flag names, I suggest that the units should be '1', i.e. a dimensionless value, assuming that the variables will be accompanied by flag_values and flag_meanings attributes. If we can clarify these points then I think the names can be accepted for inclusion in the standard name table. Best wishes, Alison ------ Alison Pamment Tel: +44 1235 778065 NCAS/British Atmospheric Data Centre Fax: +44 1235 446314 STFC Rutherford Appleton Laboratory Email: [email protected] R25, 2.22 Harwell Oxford, Didcot, OX11 0QX, U.K. From: [email protected] [mailto:[email protected]] On Behalf Of Maarten Plieger Sent: 30 November 2010 16:49 To: Jonathan Gregory Cc: [email protected] Subject: Re: [CF-metadata] MSG Cloud physical properties codification Dear Jonathan, Good point. That is OK with us, off course. Thanks again! Regards, Maarten Jonathan Gregory schreef: Dear Maarten Yesterday I didn't notice that these don't have _radiance on the end. I think that would make them clearer, if OK with you. thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_infrared thermodynamic_phase_of_cloud_water_particles_at_cloud_top_defined_by_near_infrared When everybody agrees with these standard names, units and descriptions: what would be the next step? Alison will consider them. She is responsible for moderating discussions and updating the standard name table with agreed additions. Best wishes Jonathan -- Maarten Plieger KNMI, R&D Information and Observation Technology, De Bilt (t) +31 30 2206330 -- Scanned by iCritical. _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
