Constrained Wave-telescope Technique

Abstract

We revisit the mathematics behind the application of the physically informed constraint matrix used in the wave-telescope technique. The constraint matrix, used to enforce the divergence-free nature of the magnetic field when processing in situ multi-spacecraft data, is found in a few different forms in the literature. We give brief analytical and computational evidence to support a particular combination of constraint matrix and spectral energy density equation for the wave-telescope technique.