CO Plume Height from IASI (COPHI) v1

These files provide the altitudes of plumes retrieved from IASI measurements using CO signature.  The retrieval approach is described and evaluated extensively in Lecomte 2025; the current algorithm is named COPHI (CO plume height from IASI) and is in its first version. It provides data from 01/01/2008 to 22/11/2024.

They contain

. The latitude, expressed in °N, with 4 decimals.

. The longitude, expressed in °E, with 4 decimals.

. The date (named DateTime), expressed in serial date/time, i.e. days since 0000-00-00 .

. A day/night filter (named DNfilter), whose values 1 and 0 correspond respectively to day and night measurement.

. The altitude of the plume, expressed in km, with no decimals. These altitudes are derived from the calculation of a hyperspectral range index (HRI) for CO, computed every kilometer from the ground up to 20 km. The altitude corresponding to the maximum HRI value is defined as the plume altitude.

. The maximum HRI value (named HRIvalue, with 4 decimals).

. A quality flag, with possible values of 0, 1, or 2. Data with a quality flag of 0 are not recommended for use. Data with a quality flag of 1 indicate a higher HRI threshold with altitude. Data with a quality flag of 2 are classified as “most reliable” since they are associated to a difference between the maximum value of the HRI profile and its mean that exceeds one standard deviation. The development team recommends using data with a quality flag of either 1 or 2.

Lecomte G. Méthodes innovantes pour la restitution des altitudes de panaches de CO à partir de données satellitaires dans l’infrarouge. phd-thesis, ULB, 2025. To be published