On 14/02/13 10:47, Peter Miu wrote:
Nine standard names and units are proposed, and these can be found
under the following URL:
http://www.eumetsat.int/Home/Main/DataAccess/EUMETSATDataCentre/SP_2013021492840299?l=en
To make replies easier and as some of us (normally me!) may be too lazy
to click, I've taken the liberty of cut & pasting the proposed names,
units and definitions below, hopefully without errors.
azimuth_angle
* degrees
* Azimuth angle is the angle measured towards the east, from north,
along the astronomical horizon to the intersection of the great circle
passing through the point and the astronomical zenith with the
astronomical horizon.
platform_latitude
* degrees_north
* Latitude of the satellite measured at the sub-satellite point
platform_longitude
* degrees_east
* Longitude of the satellite measured at the sub-satellite point
platform_altitude
* m
* Altitude of the satellite above mean sea level
sensor_band_spectral_width
* cm-1
* Bandwidth of the satellite’s spectral channel
toa_spectral_irradiance
* mW m-2 (cm-1)-1
* "toa" means top of atmosphere; irradiance which is relevant for any
sensor measuring in the UV-VIS and NIR. This parameter is reported by
integrating over the whole sphere.
toa_spectral_reflectance
* 1 (dimensionless)
* Ratio of radiance to irradiance I/I0, reflection from a thick layer
where the layer, here the atmosphere, is part of the reflection's property.
toa_outgoing_inband_radiance
* mW m-2 sr-1
* "toa" means top of atmosphere; "outgoing" means emitted toward outer
space; the radiance is integrated over a discrete band.
toa_reflectance
* Percent
* Ratio of the energy of reflected to incident light at the top of
atmosphere.
Cheers,
Mike.
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