Since 2018, three IASI instruments have been operated simultaneously on board Metop-A, B and C satellites. For Metop-A, operated since October 2006, 2021 marked the end of life process. However before saying goodbye to the spacecraft, and given that all its subsystems were healthy, an End Of Life test campaign at satellite and instrument levels was decided. On IASI, we took advantage of this particular phase to propose tests that would not had been considered normally on an operational satellite due to service outages and risk of damaging the instrument. The duration of these End Of Life campaign was more than 3 months to allow an important number of tests, dedicated to various purposes. After iterations between industry, partners and product experts, several tests were selected by the agencies. These tests can be sorted in two categories: technologies and science tests. The EOL campaign finished on time on December 2021. The tests are fruitful and after reviewing the outcomes we are now able to present the most significant results. In order to give a clear overview of the End of life test campaign on IASI A, this article will address the objectives of the tests, their progress and main results but also some feedbacks of the EOL process itself.
Developed by ADS under CNES responsibility in partnership with Eumetsat, IASI-NG payload on board of METOP-SG satellite will deliver data for operational meteorology, climate monitoring, and atmospheric chemistry in the next decades. In order to improve by a factor two compared to IASI the spectral resolution and radiometric error, the instrument is designed around a Mertz compensated interferometer, whose good spectral performances have been checked at subassembly level in 2020. The PFM is now fully integrated and will go through functional tests, performance tests at ambient and in TVAC through 2022. The aim of this paper is to give an overview on these activities.
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