So, awhile back I asked this question Reversing the rotation of the Earth, effects
In it I said that,
We can probably assume that Dr. Doofenshmirtz wanted this to happen quickly, within a day, so from normal rotation speed to reverse rotation within 24 hours. We can also probably assume that he wanted to get to the same speed in reverse, so from 460 m/s or 1000 mph, in our current direction, to zero, to 460 m/s or 1000 mph in the other direction all within 24 hours.
I wanted to know what the large scale effects on the Earth would be. I received the following in an excellent answer by Penguino.
If the evil doctor can somehow decelerate and accelerate all the interior and exterior parts of the earth in unison (including the sea) - for example some hyper-technology tractor beam - then there should be no ultra-catastrophic problems. The surface acceleration required to do the reversal in 24 hours is around 0.01 m/s2 , or about 1/1000 of the acceleration due to gravity. If you were standing still on the surface you probably wouldn't even notice it. But there might be subtle effects due to the temporary reduction in centripetal force on the earth's crust that could result in earthquakes, volcanic activity etc. Note that in the future, tides would occur around every 11-12 hours rather than every 12-13 hours. And I almost forgot to mention, if all rotational motion is 'near-instantaneously' reversed then the earth's generated magnetic field would also want to switch polarity. This might have interesting effects on the ionosphere, national grids and the like.
Based on already given answers, I am narrowing down what I'm asking to the following:
If the Earth's rotation was reversed based on the above stipulations, what would happen to our satellites and satellite based communications (GPS, Internet, ect.) during this day. Bonus points for long term effects/how long would it take for us to recover.