[CF-metadata] New Standard Names for Satellite Data
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-- bruno.piguet at meteo.fr ?quipe GMEI/TRAMM CNRM-GAME : UMR Meteo-France/CNRS n?3589 Le 11/01/2013 17:29, Aleksandar Jelenak - NOAA Affiliate a ?crit : > Dear All, > > I proposed a set of new standard names in November last year. They are > repeated at the end of this message. Since no one discussed any of the > proposed names and it is now more than one month after the initial > submission I ask that these names now be considered accepted. > > Because of the suggestions received off this list about the > datetime_iso8601 standard name I will resubmit a modified proposal in > a separate e-mail. In light of the recent discussions on calendars and > string representation of datetime information I don't want that the > discussion about this name slow down adoption of the others. > > -Aleksandar > > > On Tue, Nov 20, 2012 at 9:34 AM, Aleksandar Jelenak - NOAA Affiliate > <aleksandar.jelenak at noaa.gov> wrote: >> [...snip...] >> Proposed standard names are: >> >> 1) sensor_band_identifier >> >> Alphanumeric identifier of a sensor band. >> >> Units: N/A >> >> 2) sensor_band_central_wavelength >> >> The central wavelength of a sensor's band, calculated as the first >> moment of the band's normalized spectral response function. >> >> Units: m >> >> 3) sensor_band_central_wavenumber >> >> The central wavenumber of a sensor's band, calculated as the first >> moment of the band's normalized spectral response function. >> >> Units: m-1 >> >> 4) sensor_band_central_frequency >> >> The central frequency of a sensor's band, calculated as the first >> moment of the band's normalized spectral response function. >> >> Units: Hz >> >> 5) time_interval >> >> An interval of time. >> >> Units: s >> >> 7) sensor_zenith_angle >> >> The angle between the line of sight to the sensor and the local >> zenith; a value of zero is directly overhead. >> >> Units: degree >> >> 8) platform_look_angle >> >> "platform" refers to the vehicle from which observations are made e.g. >> airplane, ship, or satellite. Platform look angle is the angle between >> the line of sight from the platform and the direction straight >> vertically down. Zero look angle means looking directly beneath the >> platform. >> >> Units: degree >> >> 9) sensor_look_angle >> >> The angle between the line of sight from the sensor and the direction >> straight vertically down. Zero look angle means looking directly >> beneath the sensor. >> >> Units: degree >> >> 10) platform_azimuth_angle >> >> "platform" refers to the vehicle from which observations are made e.g. >> airplane, ship, or satellite. Platform azimuth angle is the horizontal >> angle between the line of sight from the observation point to the >> platform and a reference direction at the observation point, which is >> often due north. The angle is measured clockwise starting from the >> reference direction. >> >> Units: degree >> >> 11) sensor_azimuth_angle >> >> The horizontal angle between the line of sight from the observation >> point to the sensor and a reference direction at the observation >> point, which is often due north. The angle is measured clockwise >> starting from the reference direction. >> >> Units: degree >> >> 12) relative_platform_azimuth_angle >> >> Difference between two platform_azimuth_angle values. >> >> Units: degree >> >> 13) relative_sensor_azimuth_angle >> >> Difference between two sensor_azimuth_angle values. >> >> Units: degree >> >> 14) toa_outgoing_spectral_radiance >> >> "toa" means top of atmosphere; "outgoing" means emitted toward outer >> space; "spectral" means per unit wavenumber or as a function of >> wavenumber. Radiance is the radiant power per unit area in a >> particular direction per unit of solid angle. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 15) toa_outgoing_spectral_radiance_mean_within_collocation_target >> >> An average of toa_outgoing_spectral_radiance observations from >> sensor's adjacent field of views within a collocation target. >> Collocation target is an area on the Earth's surface at which >> observations from at least two sensors are collected. Its size is >> defined by the sensor with the largest field of view footprint. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 16) toa_outgoing_spectral_radiance_stdev_within_collocation_target >> >> Standard deviation of toa_outgoing_spectral_radiance observations from >> sensor's adjacent field of views within a collocation target. >> Collocation target is an area on the Earth's surface at which >> observations from at least two sensors are collected. Its size is >> defined by the sensor with the largest field of view footprint. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 17) toa_outgoing_spectral_radiance_mean_within_collocation_scene >> >> An average of toa_outgoing_spectral_radiance observations within a >> collocation scene. Collocation scene is a grouping of sensor's >> adjacent field of views (FOVs) centered on a collocation target. >> Collocation target is an area on the Earth's surface at which >> observations from at least two sensors are collected. Its size is >> defined by the sensor with the largest FOV footprint. Collocation >> scene's size is typically about twice the size of its collocation >> target. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 18) toa_outgoing_spectral_radiance_stdev_within_collocation_scene >> >> Standard deviation of toa_outgoing_spectral_radiance observations >> within a collocation scene. Collocation scene is a grouping of >> sensor's adjacent field of views (FOVs) centered on a collocation >> target. Collocation target is an area on the Earth's surface at which >> observations from at least two sensors are collected. Its size is >> defined by the sensor with the largest FOV footprint. Collocation >> scene's size is typically about twice the size of its collocation >> target. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 19) constant_term_of_spectral_radiance_correction_due_to_intercalibration >> >> Constant term (offset) of the formula for correcting measured spectral >> radiance. The correction is derived from intercalibration between the >> monitored and the reference sensor. The resulting corrected spectral >> radiance of the monitored sensor becomes comparable with measured >> spectral radiance of the reference sensor. "Spectral" means per unit >> wavenumber or as a function of wavenumber. Radiance is the radiant >> power per unit area in a particular direction per unit of solid angle. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 20) linear_term_of_spectral_radiance_correction_due_to_intercalibration >> >> Linear term (slope) of the formula for correcting measured spectral >> radiance. The correction is derived from intercalibration between the >> monitored and the reference sensor. The resulting corrected spectral >> radiance of the monitored sensor becomes comparable to measured >> spectral radiance of the reference sensor. "Spectral" means per unit >> wavenumber or as a function of wavenumber. Radiance is the radiant >> power per unit area in a particular direction per unit of solid angle. >> >> Units: 1 >> >> 21) quadratic_term_of_spectral_radiance_correction_due_to_intercalibration >> >> Quadratic term of the formula for correcting measured spectral >> radiance. The correction is derived from intercalibration between the >> monitored and the reference sensor. The resulting corrected spectral >> radiance of the monitored sensor becomes comparable to measured >> spectral radiance of the reference sensor. "Spectral" means per unit >> wavenumber or as a function of wavenumber. Radiance is the radiant >> power per unit area in a particular direction per unit of solid angle. >> >> Units: mW-1 m2 sr cm-1 >> >> 22) covariance_between_constant_and_linear_terms_of_spectral_radiance_correction >> >> Covariance between >> constant_term_of_spectral_radiance_correction_due_to_intercalibration >> and linear_term_of_spectral_radiance_correction_due_to_intercalibration >> values. >> >> Units: mW m-2 sr-1 (cm-1)-1 >> >> 23) toa_brightness_temperature_of_standard_scene >> >> "toa" means top of atmosphere. Brightness temperature of a body is the >> temperature of a black body which radiates the same power per unit >> solid angle per unit area at a given wavenumber. Standard scene is a >> target area with typical Earth surface and atmospheric conditions that >> is accepted as a reference. The top-of-atmosphere radiance of the >> standard scene is calculated using a radiative transfer model for a >> given viewing geometry. The resultant top-of-atmosphere spectral >> radiance is then integrated with a sensor's spectral response function >> and converted to equivalent brightness temperature. >> >> Units: K >> >> 24) toa_brightness_temperature_bias_at_standard_scene_wrt_intercalibration >> >> The difference between top-of-atmosphere (TOA) brightness temperature >> of the reference sensor and TOA brightness temperature of the >> monitored sensor. This TOA brightness temperature difference is a >> measure of the calibration difference between the monitored and >> reference sensors. Standard scene is a target area with typical Earth >> surface and atmospheric conditions that is accepted as a reference. >> Brightness temperature of a body is the temperature of a black body >> which radiates the same power per unit solid angle per unit area at a >> given wavenumber. TOA brightness temperature of the standard scene is >> calculated using a radiative transfer simulation for a given viewing >> geometry. The resultant top-of-atmosphere spectral radiance is then >> integrated with each sensor's spectral response function and converted >> to equivalent brightness temperature. >> >> Units: K >> >> >> >> -Aleksandar > _______________________________________________ > CF-metadata mailing list > CF-metadata at cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata >Received on Fri Jan 11 2013 - 09:52:32 GMT
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