Comprehensive Analysis of Bias in TEMPO NO₂ Column Densities Through Pandora Observations

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TEMPO underestimates NO2 levels by up to 31% at high concentrations and overestimates by 16% at low levels.
The correlation coefficient of TEMPO data with Pandora observations is highest at 0.87 when solar zenith angles are between 10-20°.
Performance discrepancies exist between stations, with correlation coefficients ranging from 0.29 to 0.84, indicating variable accuracy.
Validation against TROPOMI shows TEMPO's agreement with Pandora observations is strong, with indices of agreement near 0.93.

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Observational analysis reveals bias in NO2 measurements from TEMPO in North America, indicating performance variability by altitude.

Ghahremanloo et al. (2025) studied this question.

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