First joint Aditya-L1 and Proba-3 solar analysis published

The first joint analysis of Aditya-L1 and Proba-3 observations has been published.

The IIA partnership combined VELC and ASPIICS observations, and the study appeared in Astronomy & Astrophysics.

Aditya-L1 launched on 2023-09-02 on PSLV-C57, is India's first dedicated solar mission, and uses a halo orbit near the Sun-Earth L1 point.

VELC is an Aditya-L1 payload developed by IIA and ISRO, covering 1.05 to 1.5 solar radii and using 5303 Angstrom observations.

ESA's Proba-3 launched from Sriharikota on 2024-12-05 aboard PSLV-XL. It is the world's first precision formation-flying mission; the mission is linked to 150 meters and an artificial solar eclipse.

ASPIICS is Proba-3's payload observing 1.1 to 3 solar radii in white light and the 5303 Angstrom green coronal line.

VELC and ASPIICS made joint observations of nearly the same solar-corona region and had a common field of view in the low corona.

Both instruments observed a CME on 14 September 2025 and another on 16 September 2025, totaling 2 CMEs.

ASPIICS returned sharp images that enable estimates of CME shape, dynamics and mass, while VELC caught eruptions at an early stage.

VELC provided independent estimates of CME density and thermal energy, and a separate VELC result reports 2000000 degrees; the combined observations constrain CME mass, density and energetics in the inner corona.

The work links VELC, developed by IIA and ISRO, with ASPIICS on ESA's Proba-3, showing joint observations of nearly the same solar-corona region.

For readers tracking the lunar industry, the report shows 2 CMEs were measured jointly and that the observations constrain CME mass, density and energetics.