The IASI/Metop-B HCOOH ANNI v4 product

This dataset comprises the version 4 of the HCOOH product retrieved from IASI/Metop-B between July 2022 and June 2023, using the Artificial Neural Network for IASI (ANNI) version 4 retrieval scheme. Each day is represented by a .nc file. For detailed information on the HCOOH product, please refer to Franco et al. (2018) "A General Framework for Global Retrievals of Trace Gases From IASI: Application to Methanol, Formic Acid, and PAN" (JGR, https://doi.org/10.1029/2018JD029633) and for a description of the ANNI v4 retrievals, please consult Clarisse et al. (2023) "The IASI NH3 version 4 product: averaging kernels and improved consistency" (AMT, https://doi.org/10.5194/amt-16-5009-2023). Prior to using this dataset, we recommend reaching out to the main developers Bruno Franco ([e-mail]) and Lieven Clarisse ([e-mail]) for guidance and information on more recent product versions.