Summary figure of the properties extracted from the whistlers detected in the DFB cross-spectra for PSP encounter 1. Wave frequency vs. solar distance. Each dot represents a wave packet in the spectra, with their WNA color-coded, their relative amplitude constraining the size of the dot, and the absence of collocation with |B| dip resulting in an empty dot. The two gray lines indicate 20% of the electron-cyclotron frequency f_ce and the lower-hybrid frequency f_lh, from November 1, 2018, until November 11, 2018. As seen in Sect. 4.1, most of the whistlers are detected from November 1 to November 5. The second part of these gray lines (the outbound phase of the encounter) are thus relevant for very few events.