Investigations of Titan electric environment and the Titan Electric Environment Package for the TandEM mission

The Permittivity, Wave, and Altimetry (PWA) analyzer, an element of the Huygens Atmospheric Structure Instrument (HASI), investigated the electric environment during the descent of the Huygens Probe through the atmosphere of Titan. The PWA analyzer has measured the electric conductivity profile in the range 40-140 km and identified a conductivity peak related to aerosols and cosmic rays at about 60 km, measured the dielectric properties of the surface and its evolution after landing, and detected an ELF signal that resemble to a natural signature of a Schumann resonance within Titan atmospheric cavity. In this work, we summarize ongoing atmospheric electricity studies and discuss the rationale and architecture of the Titan Electric Environment Package (TEEP) instrument proposed for the Titan and Enceladus Mission (TandEM) mission.