Harmonic Scale Framework-Sun

Wepresent a compact forward model (the sun-function) for disk-integrated solar radio/mm
 spectra. The measured power spectrum is written as a smooth bandpass multiplied by a small
 set of physically motivated components: a free–free (bremsstrahlung) continuum and a few
 gyro-resonant features at integer harmonics of the electron cyclotron frequency. Fitting this
 model to a single, non-imaging spectrum yields quantitative estimates of the coronal magnetic
 f
 ield B, the electron density ne, and a temperature/emission-measure proxy (Te/EM), with
 uncertainties. The framework also provides practical diagnostics to distinguish solar features
 from instrumental spurs. We include a minimal workflow and ready-to-run pseudocode to
 facilitate adoption and reproducibility.