GRIB2 - TABLE 4.2-0-16

PARAMETERS FOR DISCIPLINE 0
CATEGORY 16

(Meteorological products, Forecast Radar Imagery category)

In Section 0, Octet 7 = 0
In Section 4, Octet 10 = 16

Revised 09/11/2025
Red text depicts changes made since 08/04/2025


Number
(In Section 4, octet 11)
 Parameter Units
 Abbrev
0
 Equivalent radar reflectivity factor for rain m m6 m-3
 REFZR
1
 Equivalent radar reflectivity factor for snow m m6 m-3
 REFZI
2
 Equivalent radar reflectivity factor for parameterized convection m m6 m-3
 REFZC
3
 Echo Top (See Note 1) m
 RETOP
4
 Reflectivity dB
 REFD
5
 Composite reflectivity dB
 REFC
6
 Precipitation Rate kg m-2s-1
 PRATEF
7-191
 Reserved

192-254
 Reserved for Local Use

192
 Equivalent radar reflectivity factor for rain m m6 m-3
 REFZR
193
 Equivalent radar reflectivity factor for snow m m6 m-3
 REFZI
194
 Equivalent radar reflectivity factor for parameterized convection m m6 m-3
 REFZC
195
 Reflectivity dB
 REFD
196
 Composite reflectivity dB
 REFC
197
 Echo Top (See Note 1) m
 RETOP
198
 Hourly Maximum of Simulated Reflectivity dB MAXREF
199
 Hourly Maximum of Composite Reflectivity dB MAXREFC
255
 Missing



Notes:

(1)  For Echo Top product, Use octet number 38 to store threshold value (for example, 18.3 dB) in Product Definition Template 4.20. See Template 4.20.

(2) Decibel (dB) is a logarithmic measure of the relative power, or of the relative values of two flux densities, especially of sound intensities and radio and radar power densities. In radar meteorology, the logarithmic scale (dBZ) is used for measuring radar reflectivity factor (obtained from the American Meteorological Society Glossary of Meteorology).


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