Maps of the polynomial coefficients of estimation of the stellar spaxels of real data of observation of the PDS70 system. The color scale is saturated at the 25% and 75% quartiles and centered on 0 by extension in the negative or in the positive (except for the degree of 0 coefficient as corresponding to the total flux). For each spaxel, before estimating the coefficients, each modulation by the base polynomials is L2 normalized (after subtraction of the average, except for the degree of 0, responsible for the total flux). Various spatial components of the PSF are identifiable thanks to the orthogonality of the polynomial basis used. Notably, the degree of 0 and 1 coefficient maps reveal the diffraction spikes in addition to the AO radius, the degree of 2 and 3 coefficient maps reveal other related patterns as well as the heart of the Airy disk, and the degree of 4 and more coefficient maps reveal the secondary rings of the Airy disk (with their outward displacement as the degree of the polynomial increases).