NEW : Controllers to tweak antenna , work on sensor glitch , mission manager says . Comment: The $ 2.6 billion Curiosity made its dramatic arrival on Martian terrain Monday . The rover is supposed to last for two years on Mars , but it may operate longer -- after all , Spirit and Opportunity , which arrived on Mars in 2004 , were each only supposed to last 90 Martian days . `` The image sequence received so far indicates Curiosity had , as expected , a very exciting ride , '' NASA says .
NEW : Controllers to tweak antenna , work on sensor glitch , mission manager says . Comment: The $ 2.6 billion Curiosity made its dramatic arrival on Martian terrain Monday . `` The image sequence received so far indicates Curiosity had , as expected , a very exciting ride , '' NASA says .