Update 4: 00:34 UTC A field mill is a device situated near pad that measures the electrical charge around the pad and helps to predict potential lightning strikes.
Update 3: 00:30 UTC Crew rest did not largely factor into the decision for with a 48-hour turn around and launch of Wednesday.
Update 2: 00:00 UTC weather for Wednesday has 40% chance of prohibiting the launch. Thursday is the last option to launch STS127 until July 26.
Update 1: At 22:50 UTC NASA’s launch director Pete Nickolenko briefed the teams that the next launch attempt will be on Wednesday, July 15 with the launch window opening at 21:58 UTC. NASA will target the launch itself for 22:03:10 UTC.
July 13, 2009 at 22:39 UTC, NASA’s launch director (LD) Pete Nickolenko coordinating with the Mission Management Team (MMT) called off today’s launch of the Space Shuttle Endeavor on the STS-127 mission due violations in three weather criteria including lightning, restrictions on anvil clouds and the field mill violation, ending yet another “full dress launch rehearsal” for the crew of STS-127.
The launch was scrubbed against during the final T-9 minute hold, while the LD and MMT were polling stations for the Go/No-Go for launch. In addition to the launch site weather violations, the Mission Control in Houston also called a No-Go due to unacceptable weather forecast for a possible Return To Launch Site (RTLS) abort.