A X band Helix Travelling Wave Tube (TWT), named ET6565, is being developed at Leonardo Palermo Plant under European Space Agency (ESA) contract n° 400012923219NLGLCvr., targeting a TWT for compact ...

Geosynchronous synthetic aperture radar (GEO SAR) has been studied for several decades but has not yet been implemented. This paper provides an overview of mission design, describing significant ...