Dear lord, that "aperture leakage" thing was the straw that broke the spine of my respect to Watts and his work.
Remember I read Echopraxia first (but after the domestification of vampires) and Blindsight second. Echopraxia was such an astonishing mess of badly thought out things that when I started to read Blindsight I had very low energy to continue reading.
The Blindsight started with firefall, that is a 65K things that suddenly appeared and photographed the Earth while burning in atmosphere.
Do you know that current 1sqkm radio telescopes produce data that can't be processed at real time in any cluster environment in use at 2015-2016? They scan skies at precision I just cannot express in words, let's try math.
https://www.skatelescope.org/uploaded/2950_31734_2007_IAU_Ta...
"...with a resolution of few micro-angular-seconds..."
sin(5/57/60/60/1000000) equals to 2.4366472e-11. It is sine of roughly 5 micro angular seconds (1 radian is about 57 degrees). 1/sin(5/57/60/60/1000000) is roughly equal to distance where current SKA can distinguish 1 meter radio-emitting object and it equals to about 41 million kilometers - a fourth of the distance between Sun and Earth.
These Firefall objects just won't be "unnoticeable until their entry to the atmosphere" in the state of the art sky scaling systems of Blindsight's time.
Almost everything in Watts' works just don't add up. I cannot break the wall of disbelief because of that, sorry. What others see as a minor forgivable thing I see as another transgression against laws of physics, rate of progress, etc, etc.