140x140 picture - I can't see the logo nor the text...
But it doesn't matter as I can't really help further. When you mentioned the satellite dish I thought of Sharp (who knows, someone might interpret the little tower as an acorn somehow)..
I'm not really familiar with other "Atomic" clocks.
I would recommend that you put any information you can find on it, any text, numbers etc. into Google and look at "Images" and see if something matching your device comes up.
Also if you are comfortable doing so, take it apart and look for text, numbers etc. on the circuit board and do the same.
Failing that, look for something that has the same display as yours - if it is a generic product, it may be packaged by different companies in different enclosures, but it would be likely to have the same controls.
You could also try contacting the eBay seller, perhaps they know where it came from of where to find documentation.
If none of that works, you will have to "figure it out". Looks like it has a calendar, so it may be a bit more complicated than a basic clock, but usually you can figure out what the buttons do.
As for the "Atomic" aspect, generally you just turn the feature on, put it somewhere it should be able to get a signal (I have mine on the outside wall of an upper story room), and leave it for a day and you should find that it has set itself. There should be an option somewhere where you tell it what time zone you are in.
Dave