# Concept

## histogram_of_backscattering_ratio_in_air_over_height_above_reference_ellipsoid

URI | http://vocab.nerc.ac.uk/collection/P07/current/RSLGQH3R/ | ||
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Within Vocab | Climate and Forecast Standard Names | ||

Alternative Labels | |||

Definition | Scattering of radiation is its deflection from its incident path without loss of energy. Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeding pi/2 radians. A scattering_angle should not be specified with this quantity. "Backscattering ratio" is the ratio of the quantity with standard name volume_attenuated_backwards_scattering_function_in_air to the quantity with standard name volume_attenuated_backwards_scattering_function_in_air_assuming_no_aerosol_or_cloud. "histogram_of_X[_over_Z]" means histogram (i.e. number of counts for each range of X) of variations (over Z) of X. The data variable should have an axis for X. A reference ellipsoid is a regular mathematical figure that approximates the irregular shape of the geoid. A number of reference ellipsoids are defined for use in the field of geodesy. The geoid is a surface of constant geopotential with which mean sea level would coincide if the ocean were at rest. To specify which reference ellipsoid is being used, a grid_mapping variable should be attached to the data variable as described in Chapter 5.6 of the CF Convention. | ||

Date | 2019-05-14T17:27:19 | ||

Identifier | SDN:P07::RSLGQH3R | ||

Note | accepted | ||

Has Current Version | 1 | ||

version | 1 | ||

Same As | `P07:CF12N209` |
histogram_of_backscattering_ratio_over_height_above_reference_ellipsoid | Mapping: 1590399 |

MMI | http://mmisw.org/ont/cf/parameter/histogram_of_backscattering_ratio_in_air_over_height_above_reference_ellipsoid | Mapping: 341286 | |

CF | http://vocab.nerc.ac.uk/standard_name/histogram_of_backscattering_ratio_in_air_over_height_above_reference_ellipsoid/ | Mapping: 379338 | |

Related | `P06:UUUU` |
Dimensionless | Mapping: 1590398 |

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