Recover a cross-height phase bridge and independently confirm the low-coronal modulation

Establish whether the 80–130 minute EUVI 171 Å low-coronal modulation candidate is connected by a phase-preserving bridge to the later outer-coronal periodic density structures, and obtain independent calibration confirmation of the modulation result.

Background

The analysis identifies a local 80–130 minute excess in EUVI 171 Å at 1.10–1.20 solar radii and finds stronger ensemble organization in upper COR1, but the tested EUVI–COR1 and EUVI–COR2 continuations do not establish a common phase-locked sequence. Consequently, the low-coronal modulation remains a candidate source-side clock rather than an established trigger for individual releases.

The paper also reports that a direct reconstruction from COR1 Level-0 polarizer triplets does not reproduce the favorable aggregate association or a stable acceleration/deceleration break. A complete, frozen SECCHI Level-1 calibration and independent low-coronal observables are therefore needed to confirm the modulation and determine whether it is causally related to the later structures.