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Radar units #42

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Merged
semmerson merged 2 commits into from
Mar 17, 2021
Merged

Radar units #42

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d80714c
Add Bz symbol for reflectivity (to support "dBz")
dopplershift Mar 4, 2016
97944a5
Add unit definition for dB.
dopplershift Mar 4, 2016
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13 changes: 11 additions & 2 deletions lib/udunits2-common.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,11 @@ elements appear only within <aliases>.
</aliases>
<definition>parts per quadrillion</definition>
</unit>
<unit>
<def>lg(re 1)</def>
<aliases> <symbol>B</symbol> </aliases>
<definition>logarithmic unit used to express dimensionless ratios; a value of 0 B (0 dB) corresponds to a ratio of 1</definition>
</unit>

<!-- Plane Angle -->
<unit>
Expand Down Expand Up @@ -885,10 +890,14 @@ elements appear only within <aliases>.
</aliases>
<definition>unit of volume for liquid measure in the Imperial system, equal to 1/160 liquid gallon</definition>
</unit>
<!-- See http://dx.doi.org/10.1175/2009JTECHA1360.1 for more information on proper spelling of dBz -->
<unit>
<def>lg(re (1e-6 m)^3)</def>
<aliases> <symbol>BZ</symbol> </aliases>
<definition>logarithmic unit used to compare the reflectivity (Z) of an unknown remote object, to the reflective return created by a droplet of rain with a diameter of 1 mm; is the base unit for "dBz", which is the typical logarithmic unit for measuring atmospheric radar reflectivity; a value of 0 Bz (0 DBz) corresponds to the return from a single cubic micron; a value of 6 Bz (60 DBz) corresponds to extremely heavy rain.</definition>
<aliases>
<symbol>BZ</symbol>
<symbol>Bz</symbol>
</aliases>
<definition>logarithmic unit used to compare the reflectivity (Z) of an unknown remote object, to the reflective return created by a rain with a density of a single drop with a diameter of 1 mm in every 1 m^3 of air; is the base unit for "dBz", which is the typical logarithmic unit for measuring atmospheric radar reflectivity; a value of 0 Bz (0 dBz) corresponds to the return from a single cubic micron; a value of 6 Bz (60 dBz) corresponds to extremely heavy rain.</definition>
</unit>

<!-- Time -->
Expand Down