Not good: Because of an issue with the Atlas 5 rocket, NASA and ULA have decided to delay again the launch of the next Mars rover Perseverance from July 22nd to July 30th.
“Due to launch vehicle processing delays in preparation for spacecraft mate operations, NASA and United Launch Alliance have moved the first launch attempt of the Mars 2020 mission to no earlier than July 30,” NASA said. “A liquid oxygen sensor line presented off-nominal data during the Wet Dress Rehearsal, and additional time is needed for the team to inspect and evaluate.”
ULA performed the Wet Dress Rehearsal on June 22. The exercise involved rolling the Perseverance rover’s Atlas 5 launcher out of its vertical integration hangar to Cape Canaveral’s Complex 41 launch pad, then loading the rocket with kerosene, liquid hydrogen, and liquid oxygen propellants. The launch team practiced countdown procedures, testing the Atlas 5’s systems before halting the pre-launch sequence seconds before ignition of the rocket’s RD-180 main engine.
Their official launch window extends to August 11th, though they could still launch as late as August 15th and get to their landing site in Jezero Crater on Mars.
This is the third delay. The first involved a faulty crane and the second contamination issues in the rover’s clean room. Now an issue with an oxygen sensor. Let us hope their are no more, and that the weather then cooperates. It they don’t launch by August 15th the launch will then be postponed for two whole years.