Chris/Proba-1 Status Including Radiometric Calibration

The Project for OnBoard Autonomy-1 (Proba-1) mission was launched in 2001 and continues to operate today, with its twentieth birthday due in 2021. It carries a hyperspectral instrument, called the Compact High Resolution Imaging Spectrometer (CHRIS), alongside a high-resolution camera and instrument payloads focused on debris and space radiation. In 2019/2020, a radiometric calibration activity assessed the CHRIS spectral response changes over time. As Barrax was the test site for the 2003/2004 SP ARC campaign and has been acquired since, it was chosen. The results showed that the radiometry, as well as broader platform, are operating well and remain stable despite the mission's long life and changing orbit. In the future, further analysis of the radiometric calibration will focus on an updated analysis of the campaign datasets alongside data collected over the RadCalNet and PICS sites. Also, CHRIS can be compared to other spaceborne hyperspectral missions.