Authors: Kyung-Eun Choi(SSL), Oleksiy Agapitov(SSL)

Whistler waves in the solar wind are one of the candidates for regulating the solar wind heat flux and scattering of the suprathermal electron beam (Strahl). We investigate the whistler waves from the electromagnetic spectrogram data by Digital Fields Board (DFB) on the FIELDS instrument on board the Parker Solar Probe. In this work, the propagation direction of whistler waves, whether sunward or anti-sunward, is estimated from processing the ratio of the electric and magnetic fields wave power. We validate our technique by comparing it to the results of processing burst waveform data product. During Encounter 1, the statistics of E/B value show the whistler wave directions in the young solar wind. Furthermore, we evaluate the effective length of the electric field antenna in the whistler waves frequency range (from 50 Hz to 300 Hz).