... Modi?ed KLYPVE is a novel ?uorescence detector of ultra high energy cosmic rays (UHECRs, energies 50EeV) to be installed on the Russian Segment of the International Space Station. ... The main component of KLYPVE is a segmented two component optical system with a large entrance pupil and a wide ?eld of view, which provides annual exposure approximately twice that of the Pierre Auger Observatory. ...