I don't have any first hand experience with Starband, but I am a DISH NETWORK customer. There is a delay betwwen live TV and Satellite TV, typically about 1 1/2 seconds. The satellites are in a geo-sync orbit above the earth (in other words, so high up that even though they are in orbit, they never seem to move in the sky - about 22,500 miles up).
Starband is 2 way, so what ever delay there is (1 1/2 seconds), there will be the same going back, so I would guess it would be about 3 seconds total round trip - a big difference for a fast moving stock as seen on Time and Sales and L2, then you are attempting to get fills with a direct execution broker. I have experienced problems when my QCHARTS data feed is running a few seconds behind my broker (cyber) using a land based DSL and I'm trying to short a stock and can't get in.
On file downloads (audio, video, etc.) that do not require constant 2 way communications, there would be no real problems. For 2 way dependent applications, there would be a noticeable difference.
Depending on what type of trading you are doing, it might not be a big problem. You might consider changing the type of trading you are doing to one that would be impacted less with the blips that always occur along the way.
