Dear Alison,
> 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.
Indicative values would be:
by using infrared radiances (4-20 micrometer).
by using near-infrared radiances (1-4 micrometer).
> 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.
Yes, this is true indeed, these flags will be: liquid, ice and mixed.
>If we can clarify these points then I think the names can be accepted for inclusion in the standard name table.
That would be great :)
Best regards,
Maarten Plieger
On 01/24/2011 03:03 PM, alison.pamment at stfc.ac.uk wrote:
> 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: alison.pamment at stfc.ac.uk
> R25, 2.22
> Harwell Oxford, Didcot, OX11 0QX, U.K.
>
>
> From: cf-metadata-bounces at cgd.ucar.edu [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Maarten Plieger
> Sent: 30 November 2010 16:49
> To: Jonathan Gregory
> Cc: cf-metadata at cgd.ucar.edu
> 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
Received on Mon Jan 24 2011 - 10:27:45 GMT
