Why was the HackRF not included at all?
The paper @csete works on is focused on the use of such devices to enable satellite communications one should take into accounts the limitations and challenges of such signals (especially when working with Low Earth Orbit satellites).
HackRF is a great product with great value; if you are seeking to experiment with a versatile Software Defined Radio. In my personal opinion, it is the "swiss army knife" of SDRs.