There is no need for a citation, because it is obviously wrong.  If you calculate the angular resolution required to read 16 point font from low Earth orbit, you will find that you need a satellite with a primary mirror much larger than  has ever been launched.<p>In addition to the (currently) unavailable high-resolution imagery which would be required, atmospheric distortion would render any text illedgible, and it seems very unlikely the individual characters would be resolvable.  Many of the techniques used to reduce&#x2F;compensate for atmospheric distortion in telescopic imaging are not possible in Earth observation.