Satellite comms questions

[warp1g]

I am interested in the technology people are using to compress larger amounts (north of 40 megabit/sec) of UDP data for satellite xmission. Anyone out there with that type of expertise?<br /><br />-wP

 

[mikejz]

When you speak of UDP data are you specifically taking about IP networks, or are other methods included too?<br />

 

[CalliArcale]

UDP isn't a form of data; it's a transmission protocol. You can use it over any transmission method at all, but frankly, I highly advise against using it for satellite communications. UDP is fast and lightweight because it doesn't do anything about reliability. It just tosses the packet over the fence and assumes it got there okay. In space, you have to worry about interference in a big way, much more so than on Earth, and many of your transmissions may be mission-critical, especially if they contain instructions for a satellite's attitude control or something like that. I'd use something a tad more reliable, personally, even if it does eat into bandwidth. You want the spacecraft to know if there's been data loss.<br /><br />I'm afraid data compression isn't one of my areas of expertise, however, but there are lots of algorithms that can be used to squeeze the most out of your bandwidth. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em>  -- The Tenth Doctor, "Blink"</font></p> </div>

 

[MBA_UIU]

I do not think you are going to find your answer here. I talked to my bother in law (he is the managing chief satellite software design engineer for Collins Radio) about your question and he basically said that what you are asking is either classified by the government or within the industry considered a trade secret. <div class="Discussion_UserSignature"> <p><strong><font color="#0000ff"><br /><br /> <br /><img id="268587ce-7170-4b41-a87b-8cd443f9351a" src="http://sitelife.space.com/ver1.0/Content/images/store/6/8/268587ce-7170-4b41-a87b-8cd443f9351a.Large.jpg" alt="blog post photo" /><br /></font></strong></p> </div>