Thanks Miles,
Having read around a bit more I agree that the term luminance implies visible (ie wavelengths detected by the human eye) light and so 'luminance_in_air' would work, providing a suitable definition is included.
My straw man proposal for a definition would be 'A photometric measurement of the intensity of visible light that passes through or is emitted from a given area'. Anyone anything better?
Cheers, Roy.
-----Original Message-----
From: Miles Jordan [mailto:Miles.Jordan at aad.gov.au]
Sent: 11 January 2011 23:56
To: Lowry, Roy K.
Cc: Jonathan Gregory; cf-metadata at cgd.ucar.edu
Subject: RE: [CF-metadata] Ambient light [Sec=Unclassified]
Thanks for your patience.
I've asked what people think, and we have come up with a couple: surface_diffuse_luminance_of_shortwave_radiation_in_air or just luminance_of_shortwave_radiation_in_air.
I don't think you can have luminance without diffuse reflection and I also don't think it can be a measurement of any other wavelength so it could be as simple as luminance_in_air. But I'll leave it up to the list to decide.
Regards,
Miles
Lowry, Roy K. wrote:
> Hi Miles,
>
> I would confirm with somebody who undestands the data before making
> any decisions.
>
> Cheers, Roy.
>
> ________________________________________
> From: Miles Jordan [Miles.Jordan at aad.gov.au]
> Sent: 07 January 2011 12:07
> To: Lowry, Roy K.
> Cc: Jonathan Gregory; cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] Ambient light [Sec=Unclassified]
>
> Quite possibly. I will have to take your recommendation on that as I
> am more on the software development side of things. Or shall I ask the
> people from my end that understand the data better?
>
> Sounds ok to me though.
>
> Regards,
>
> Miles Jordan
> miles at milesjordan.com
> +61 424 879 668
>
> On 07/01/2011, at 8:35 PM, "Lowry, Roy K." <rkl at bodc.ac.uk> wrote:
>
>> Hi Miles,
>>
>> Should there be anything in the Standard Name to specify the
> wavelengths of light detected in the measurement e.g.
> luminous_intensity_of_shortwave_radiation_in air?
>>
>> Cheers, Roy.
>>
>> ________________________________________
>> From: cf-metadata-bounces at cgd.ucar.edu
>> [cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Miles Jordan
>> [Miles.Jordan at aad.gov.au]
>> Sent: 07 January 2011 00:41
>> To: 'Jonathan Gregory'
>> Cc: cf-metadata at cgd.ucar.edu
>> Subject: Re: [CF-metadata] Ambient light [Sec=Unclassified]
>>
>> Jonathan Gregory wrote:
>>> Dear Miles
>>>
>>>> Just wondering if there is a standard name that I should use for
>>> ambient light in air measured in candles; I can't see one for ambient
>>> light, luminous intensity, or anything else I can think of.
>>>
>>> I don't think there is at present. Is "candle" the same as the SI
>>> unit "candela"? Please propose a standard name if you would like
> to.
>>
>> Yes, candela == candle. May I suggest luminous_intensity_in_air?
>>
>> Regards,
>>
>> Miles
>>
>>
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