  We consider sampling and detection strategies for solar illuminated space
debris. We argue that the lowest detectable debris cross section may be reduced
by 10-100x by analysis of phase-space-pixels rather than single frame data. The
phase-space-pixel is a weighted stacking of pixels corresponding to a test
debris trajectory within the very wide camera field-of-view (FOV). To isolate
debris signals from background, exposure time is set to match the time it takes
a debris to transit through the instantaneous field of view. Debris signatures
are detected though a generalized Hough transform of the data cube. Radiometric
analysis of line integrals shows that that sub-cm objects in Low Earth Orbit
can be detected and assigned full orbital parameters by this approach
