The PANTER X-ray Test Facility has been utilized successfully for developing and calibrating X-ray astronomical
instrumentation for observatories such as ROSAT, Chandra, XMM-Newton, Swift, etc.
Future missions like eROSITA, SIMBOL-X, or XEUS require improved spatial resolution and broader
energy band pass, both for optics and for cameras. Calibration campaigns at PANTER have made use of flight
spare instrumentation for space applications; here we report on a new dedicated CCD camera for on-ground
calibration, called TRoPIC. As the CCD is similar to ones used for eROSITA (pn-type, back-illuminated, 75 μm
pixel size, frame store mode, 450 μm micron wafer thickness, etc.) it can serve as prototype for eROSITA camera
New techniques enable and enhance the analysis of measurements of eROSITA shells or silicon pore optics.
Specifically, we show how sub-pixel resolution can be utilized to improve spatial resolution and subsequently the
characterization of of mirror shell quality and of point spread function parameters in particular, also relevant
for position reconstruction of astronomical sources in orbit.