The Sentinel-5p TROPOMI L2 CH4 data product (dry air averaged methane column) is in good overall agreement with correlative ground-based measurements from NDACC and TCCON. Bias and dispersion estimates (see Table below) meet mission requirements.
|Product ID||Stream||Product||Bias||Dispersion||Special features|
|L2_CH4||RPRO/OFFL||xCH4||-0.25%||0.6%||Along orbit stripes.
Underestimation at low albedo. Remaining outliers with qa_value >0.5.
1-4% seasonal and SZA dependence of bias. Lower number of pixels
with qa_value>0.5 since March 11 2020 due to changed cloud data.
The averaged correlation coefficient is 0.65 for the TCCON network
Plots show the weekly mean relative differences for the S5P RPRO/OFFL xCH4 columns against TCCON (top) and NDACC (bottom) sites. Sites are sorted by decreasing latitude.
For more information please consult the latest issue of the Sentinel-5p Routine Operations Consolidated Validation Report (ROCVR).
|Latest Quarterly Validation Report||Product info||Current Processor Version|
|#10: April 2018 – March 2021||See sentinel.esa.int||