Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of TeleCommunication Systems (Nasdaq: TSYS) jumped more than 15% in early trading today, thanks to multiple helpings of good news.

So What: The company just landed two fresh satellite systems orders from the U.S. Army, followed by a big upgrade from analyst firm Wedbush Morgan. The stock already jumped more than 40% on Wednesday, thanks to an even bigger military contract.

Now What: The good news is heaping on TeleComm Sys these days, but these happy arrivals follow a miserable first half of 2010. The stock is down by 47% year to date, even after this week's massive pop, while direct competitor General Dynamics (NYSE: GD) fell more gently, and ViaSat (Nasdaq: VSAT) provided market-beating returns. This could be the beginning of a fine turnaround story, but you may want to wait for a few more rounds of big orders in TeleComm's books.

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Fool contributor Anders Bylund holds no position in any of the companies discussed here. General Dynamics is a Motley Fool Inside Value recommendation. Try any of our Foolish newsletter services free for 30 days. True to its name, The Motley Fool is made up of a motley assortment of writers and analysts, each with a unique perspective; sometimes we agree, sometimes we disagree, but we all believe in the power of learning from each other through our Foolish community. The Motley Fool is investors writing for investors.