A domain name change may not really help you. In fact, you will be losing some important trust metrics such as site age. Most domain name changes are done under the assumption that having a keyword in a domain name will help. Keyword matches do happen, but after a long laundry list of other matches and last on the list when all other matches do not yield much results. In other words, the effect is the smallest obtainable after all other SEO work is performed. You will spend dollars for pennies.
There is an option of doing a blanket 301 redirect from an old domain to a new domain to preserve some/most metrics, however, what is often lost in the discussion is that this not only comes at a cost, but also does not remove the fact that the new domain name must perform on it's own at some point. The 301 redirect is temporary in scope and is not a complete solution.
That said. Let's look at SEO for a minute.
The most difficult thing to do in SEO is knowing what terms are used for search within your industry. You used the example satcom but could it easily be comsat ( Yes. I do know that Comsat was a company now owned by Hughes. ) for communications satellite? Taking this example, right or wrong, if you are trying to keyword match satcom or comsat, are these terms actually used? It may be that communications satellite is used more. In this case, you would do something like commucations satellite (comsat) to equate the terms communications satellite and comsat by proximity using semantics. But in order for that to work, satcom or comsat must be recognized within an industry or you will be the only one and that will not carry much weight if at all.
Any website can compete. It is popular a belief that there is no room at the top because the big boys got there first. However, it has been my experience that SEO, as a practice, is done following old linear text based thinking rather than using a full understanding of semantics. This means that there is room at the top for anyone who is willing to work for it. The biggest key is understanding that search is forever changing daily and that keeping a site attractive is an ongoing daily process of moving forward. This does not mean that a site cannot perform well for the long term based upon work done today. It can. The biggest key is knowing how people use search to find a site like yours. Again. This is the hardest part of SEO and the most valuable.
Another very real effect of the web is that good ole' fashioned marketing is still required. A website in of itself does almost nothing. You will not only have to create a buzz within your industry, but also outside of your industry. This requires PR in the traditional way- not using PR websites. Paper marketing is the most powerful form of attracting visitors as well as detailed scholarly work. Then add to that a social media that attracts the users that are effective within your industry. This may not be Facebook if no-one in your industry is looking to Facebook for solutions. But it can be Google+, LinkedIn, and Twitter. This has to be discovered. The web works best person to person - people to people. It is about creating relationships and being a top of mind presence (marketing speak) when people think communications satellite (or whatever your niche is). You have to go for saturation within your market of ideas.
In short, I often do not recommend changing a domain name unless it is truly a terrible domain name. If your domain name is your company name, I say keep it! There are 46 factors (my count) that make up branding signals. If most or nearly all branding signals are used, your domain name will be more valuable than any keyword domain name. Proper branding in search increases performance by the order of magnitude that cannot be fathomed. Just type cisco in Google to see what I mean.
