LC-14 at Cape Canaveral. The Atlas completed its burn successfully, but during the coasting phase prior to staging, the Atlas LOX tank pressure suddenly went to zero followed by missile tumbling while all Agena telemetry ceased. Postflight investigation proposed several causes, but the most likely one was inadvertent activation of the Agena Inadvertent Separation Destruct System (ISDS) charges. The ISDS system was redesigned after this incident, and MIDAS 2's booster did not carry an ISDS while modifications were being made. On May 24, MIDAS 2 was orbited successfully, but the attitude control system failed. Some data was returned by the infrared sensor before the telemetry system also failed. Several planned experiments such as detection of flares on the ground and a Titan I missile test were abandoned. It remained in orbit until decaying in 1974. The next launch in the series did not take place for over a year and the program now moved to the West Coast, with Point Arguello's SLC-3 1-2 being its base of operations. During this interval, two CORONA satellites also carried and tested MIDAS sensors. MIDAS 3, the first operational model, was launched on July 24, 1961 using the new, restartable Agena B stage. The Atlas's programmer reset itself due to a malfunction during booster jettison, but the satellite reached orbit successfully. However, one solar panel failed to deploy, starving MIDAS 3 of electrical power and it died after a few orbits. MIDAS 4 (October 21) brought about further frustration when the Atlas lost roll control at T+186 seconds. The satellite was placed into an incorrect trajectory, causing the Agena B to exhaust its attitude control gas trying to compensate during its two burns. By the time MIDAS 4 reached its intended transfer orbit, there was no attitude control gas left and the satellite could not be stabilized. It did manage to detect a Titan I launch from Cape Canaveral before one solar panel failed. A week into the mission, MIDAS 4 died when its batteries ran down. A month later, a similar control problem on SAMOS 4 resulted in the satellite failing to attain orbit. Investigation into the two failures found that the retrorocket package heat shields on both Atlas had broken off during launch, exposing the gyroscope package to aerodynamic heating. A transistor used in the roll output channel was also suspected to be at fault. It was replaced by a different type