Hi, I have flown my phantom 2 a few times, always on GPS mode and have always had all green blinking before takeoff. Today, I had 4 slow green blinks with one rapid red blinking...does anyone know what this means?? I tried calibrating the compass a couple times but I would always eventually get green, green, green,green, rapid red. From what I have read it may just not be picking all the satellites, only a few? I'm a newbie so I didn't want to risk flying it if there was something off, any insight would be great. Thanks in advance.