GRIB2 - TABLE 4.2-3-1

PARAMETERS FOR DISCIPLINE 3
CATEGORY 1

(Space products, Quantitative category)

In Section 0, Octet 7 = 3
In Section 4, Octet 10 = 1

Revised 09/12/2025
Red text depicts changes made since 10/30/2023


Number
(In Section 4, octet 11)
 Parameter Units
 Abbrev
0
 Estimated Precipitation
 kg m-2
 ESTP
1
 Instantaneous Rain Rate
 kg m-2 s-1
 IRRATE
2
 Cloud Top Height
 m
 CTOPH
3
 Cloud Top Height Quality Indicator
 Code table 4.219 CTOPHQI
4
 Estimated u-Component of Wind
 m s-1
 ESTUGRD
5
 Estimated v-Component of Wind
 m s-1
 ESTVGRD
6
 Number Of Pixels Used Numeric NPIXU
7
 Solar Zenith Angle ° SOLZA
8
 Relative Azimuth Angle ° RAZA
9
 Reflectance in 0.6 Micron Channel % RFL06
10
 Reflectance in 0.8 Micron Channel % RFL08
11
 Reflectance in 1.6 Micron Channel % RFL16
12
 Reflectance in 3.9 Micron Channel % RFL39
13
 Atmospheric Divergence s-1 ATMDIV
14
 Cloudy Brightness Temperature K CBTMP
15
 Clear Sky Brightness Temperature K CSBTMP
16
 Cloudy Radiance (with respect to wave number) W m-1 sr-1 CLDRAD
17
 Clear Sky Radiance (with respect to wave number) W m-1 sr-1 CSKYRAD
18 Reserved

19
 Wind Speed m s-1 WINDS
20
 Aerosol Optical Thickness at 0.635 µm
AOT06
21
 Aerosol Optical Thickness at 0.810 µm
AOT08
22
 Aerosol Optical Thickness at 1.640 µm
AOT16
23
 Angstrom Coefficient
ANGCOE
24
 Cosine of the Solar Zenith Angle Numeric COSOLZA
25-26 Reserved

27 Bidirectional Reflecance Factor (See Note 1) Numeric BRFLF
28 Brightness Temperature K SPBRT
29 Scaled Radiance (See Note 2) Numeric SCRAD
30 Reflectance in 0.4 Micron Channel % RFL04
31 Cloudy reflectance % CLDREF
32 Clear reflectance % CLRREF
33-97 Reserved

98 Correlation coefficient between MPE rain rates for the co-located IR
data and the microwave data rain rates		 Numeric CCMPEMRR
99 Standard deviation between MPE rain rates for the co-located IR
data and the microwave data rain rates		 Numeric SDMPEMRR
100-191 Reserved

192-254 Reserved for Local Use

192
 Scatterometer Estimated U Wind Component
 m s-1
 USCT
193 Scatterometer Estimated V Wind Component m s-1 VSCT
194 Scatterometer Wind Quality
SWQI
255
 Missing


Notes:

(1)  The ratio of the radiant flux reflected by a surface to that reflected into the same reflected-beam geometry and wavelength range by an ideal (lossless) and diffuse (Lambertian) standard surface, irradiated under the same conditions.

(2)  Top of atmosphere radiance observed by a sensor, multiplied by π divided by the in-band solar irradiance.


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