Alien signals where detected by accident, promptly ignored
In May of 2017 an alien signal from Ross 128 was detected, this signal was promptly declared of human origins even if they were unable to explain in details were it came from (I don't even think they bothered to contact the operators of those satellites to check if this frequency was in use at the time of observations), or rather what satellite did broadcast the signal.
It is my idea that none of the satellite that are in the view of Ross 128 did broadcast the signal, reason being that it is not in use over the U.S. The 4,6 to 4,8Ghz is used for either Space to Earth communication or Earth to Space communication (ITU region 3, India). It is difficult for me to prove this since I'm on the wrong side of the plant (Ross 128 is below the horizon for me all the time) and I don't have the correct technology to do this (lack of money). I want to prove this, it just isn't going to happen for me at the moment.
The signal has dispersion properties showing or suggesting that it came from far away. There is always a chance that this signal is only coming from the direction of Ross 128 and might not actually be at Ross 128. I have no way to know for sure since this radio signal is not being studied. This radio signal was again observed in July-2017 on a follow up observation.
On the image of the radio signal that was published there is plenty of Earth based radio signals at 5000Mhz (?) and 4200 - 4400Mhz (C-band television broadcasting), little to nothing above that until the frequency goes up to 5000Mhz. Those Earth based signal appear clearly on the image and can easily be spotted. It is also worth noting that I don't know of any technology that can use 300Mhz of bandwidth in this way. I am also sure such technology would not be allowed on licence requirement frequency as is the case for 4500 - 4800Mhz.
What I think was detected was not a alien data transmission. This looks more like a radar signal of some type (I don't know the type, I checked for comparable techniques on Earth and found nothing). I don't have any idea how this signal works but I think radar is the most likely explanation since those are often the most powerful radio signal broadcast out. I don't know what signal strength is used, I do think it is several thousands kW or more.
As it stands now I suspect future alien signal that are discovered by accident are going to get ignored and given human explanation. I am starting to blame this on the narrow and possibly stupid definition and requirement of alien signal as it is set by SETI (and possibly the narrative that follows it). The result of this requirement is that nothing is going to be found by SETI. Not today and not 100 years from now.
I also want to point out that Ross 128 has no life like all of the other red dwarfs or low energy starts that exoplanets have been discovered in orbit around those stars. If you want to find life and possibly civilization you have to check this star types out.
Anything else is either to hot (O-type star, A-type star, B-type star) or too cold (M-type star, Y-type star and other classes of this nature). This includes Trappist-1 star system. It has water on the planets, but the planets are stone cold dead to life as we know it and it has always been like that.
I don't think that Earth has ever had an alien visit. At least not on ground, I don't know about high orbit (or even a low orbit). I don't think there is any interest among the aliens that can and do travel the stars to visit a primitive race with nuclear weapons. Smart phones and computers are not the top of technological scale after all. Rather primitive beginning of it and this technological scale goes higher and wider then people realise today.
This is just my view and some of it is not in agreement with current established ideas of today's science community.
SETI faq, https://www.seti.org/faq#obs3
Weird signal #1. http://phl.upr.edu/library/notes/ross128
Weird signal #2. http://phl.upr.edu/press-releases/theweirdsignal?utm_content=buffer0a5d3&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
Star classification, https://en.wikipedia.org/wiki/Stellar_classification#Spectral_types