A unique thing about SSI is its 40+ year balancing act between the Sciences and the Humanities. Space orgs are typically hard stuck to a side, but with The High Frontier Concept, SSI is not out to make a MISSION or a pretty picture, we are out to make a livable, sustainable, profitable working system. The SSI uniqueness was displayed in the passing around of this document prior to release. One person said "Too much math. If we put it out it will turn people off." Another said "If things like this aren't put out so the right people see that has to be looked at this way, then it will never be turned on."
This report's bottom line: A 1km transmitter in space appears technically feasible with performance virtually the same as an ideal antenna with 3 provisions.. The first sidelobe level would be within 1.5db of the error free case with 99.99% confidence. Also, the maximum pointing error would be less than 37 meters with 99.99% confidence. Even if you hate math, try page 7.