Article Index

Validation Summary

The Sentinel-5p TROPOMI L2_NO2 data (tropospheric, stratospheric, and total NO2 column) are in good overall agreement with correlative ground-based measurements (NDACC MAX-DOAS, NDACC ZSL-DOAS, and PGN direct-sun DOAS) and with the OMI QA4ECV NO2 satellite data.  Bias estimates meet the mission requirements of <50% for tropospheric NO2 and <10% for stratospheric NO2. For stratospheric NO2, the dispersion estimate meets the mission requirement of <0.5 Pmolec/cm2. For tropospheric Pmolec/cm2 the dispersion estimate exceeds the mission requirement of <0.7 Pmolec/cm2, which can however be attributed partly to comparison errors (irreducible co-location mismatch, and smoothing differences).

 

Product ID Stream Product Bias Dispersion Special features
 L2_NO2 NRTI NO2 troposphere -22% 3.6 Pmolec/cm2 Total NO2 bias varies with column amount:
positive bias over low pollution,
negative bias over high pollution,
with 7 Pmolec/cm2 as a threshold.
NO2 stratosphere -9% 0.4 Pmolec/cm2
NO2 total 0±50% -
OFFL
RPRO
NO2 troposphere -22% 3.6 Pmolec/cm2
NO2 stratosphere -6% 0.3 Pmolec/cm2
NO2 total,low +5% 1 Pmolec/cm2
NO2 total,high -22% 3 Pmolec/cm2

 

Below is an overview of the processor versions for the NRTI, OFFL and RPRO streams.

Product ID  Stream  Version Orbits
L2_NO2        NRTI 01.04.00   16259-current
01.03.02   9159-16258
01.03.01  7999-9158
01.03.00  7519-7999
01.02.02  5931-7517
01.02.00  5336-5929
01.01.00   3947-5333
01.00.02   3745-3946
01.00.01 2955-3364
OFFL 01.04.00 16211-current
01.03.02 8815-16210
01.03.01 7907-8814
01.03.00 7425-7906
01.02.02 5840-7424
01.02.00 5236-5832
RPRO 01.02.02 2836-5235


A detailed description of the method and a comprehensive discussion of validation results can be found in the Sentinel-5p Quarterly Validation Report #12: April 2018 - September 2021

 

Latest Quarterly Validation Report Product info  Current Processor Version
 #12: April 2018 - September 2021  See sentinel.esa.int

  02.02.00