re: lunar surface requirement
Did you bother to look at at what you posted? Here is the link to the PDF
And here is a the important paragraph with my highlighting...
The envisioned CAPS detection system would feature large aperture (3- to 6-m diameter), high resolution telescopes capable of imaging in the ultraviolet, optical, and infrared wavelengths. Coordinated telescope control for NEO surveying and tracking would be incorporated to maximize follow-up observations, and baffling and/or shading would be employed to permit observations close to the Sun. Figure 1 depicts a lunar-based option with a detection node consisting of a wide field-of-view (FOV) survey telescope located in the center and three narrow FOV tracking telescopes (telescope enclosures and/or baffling are not shown). Two detection nodes, located in the northern and southern lunar hemispheres, could provide nearly complete sky coverage every month. Each telescope would have large area mosaic detector arrays (approximately 36000 × 36000 pixels), with the survey telescopes having a 1.0 × 1.0-degree FOV and the tracking telescopes having a 0.1 × 0.1-degree FOV. Spectral imaging would be implemented as early as possible in the detection process. Advanced detectors capable of rapid identification of NEOs and their spectral signals could greatly simplify operations and minimize requirements
on the tracking telescopes. If NEOs could be uniquely identified in multiple survey images, a preliminary orbit could be determined with minimal risk of losing the object. The tracking telescopes would be used in an interferometric mode when higher precision astrometric observations are needed to confirm an object is on an impacting trajectory. Finally, active laser ranging could be used to provide range and range-rate data to augment precision orbit determination. Active laser ranging is preferable to radar systems due to the potentially large distances between the target and the detection system. The tracking telescopes could be used as receivers for the laser ranging system, or the return signal of faint NEOs could be enhanced through active illumination to aid in interferometry measurements.
