The annual seasonal changes in the floating potential are observed in this analysis. Changes in the beginning, the end and duration of seasons over a period of years reflect also changes of Kp index.
Changes over the solar cycle are also visible. The important TPMU goal is the validation and testing of the novel design of the instrument which is necessary for possible applications of TPMU design on future scientific missions.
The similarities in time profiles of floating potential, electron temperatures and Kp index was identified. This proves that the measurement of electron temperatures react physically and have only systematically biased.