Improvement of the PAU/PARIS End-to-end Performance Simulator (P2EPS) in preparation for upcoming GNSS-R missions

PAU/PARIS End-to-end Performance Simulator (P
²
EPS) has been developed for studying and design tools for GNSS-R space mission. For the purpose of accuracy and various scenario, P
²
EPS has recently improved in many features. Especially, the wide range of the simulation inputs enables to simulate the upcomming GNSS-R space missions. This paper presents the recent improvement of the P
²
EPS.