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The #CRS20 preflight news conference is about to begin. #SpaceX #Falcon9 #Dragon #Retirement. THREAD...
Joel (NASA): Everytime you launch a vehicle to the Station puts a smile on my face. Launch tonight will result in berthing on Monday morning. #SpaceX #Falcon9 #Dragon #CRS20
Joel: 3,700 lb of cargo coming back on this Dragon in about a month. #SpaceX #Falcon9 #Dragon #CRS20
Joel: This year, celebrating 20 years of continued human habitability of Station. #SpaceX #Falcon9 #Dragon #CRS20
Throughout CRS1 contract for cargo, SpaceX has delivered 94,000 lb of supplies to the laboratory. #SpaceX #Falcon9 #Dragon #CRS20
Joel: Huge thanks to SpaceX for this success, and we look forward to working with SpaceX on CRS2 contract flights, which being later this year, and in taking crew to the Station. #SpaceX #Falcon9 #Dragon #CRS20
Jennifer (ISS science): Research on this flight spans a wide range of fields and studies. 108 countries have now flown experiments on the Station. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Late load of 800 lbs of cargo has been completed. #SpaceX #Falcon9 #Dragon #CRS20
Hans: No issues being tracked. #SpaceX #Falcon9 #Dragon #CRS20
Hans: CRS-19 was the previous flight of this booster. Will perform Return To Launch Site landing. #SpaceX #Falcon9 #Dragon #CRS20
Hans: This Dragon is making its 3rd flight to Station, and it will retire the Dragon v1 capsule from service. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Beginning with CRS-21 mission, they will switch to Dragon2 (a "crew" Dragon configured for cargo-only runs to the Station). Dragon2 will be able to fly 5 times to Station for cargo runs. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Each Dragon v1 has two drogues and 3 main parachutes, which has helped them learn for crew. They also learned from their failures -- CRS-2 (per Hans) and CRS-7. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Dragon v1 has a great career. Looking forward to continued success of Dragon. #SpaceX #Falcon9 #Dragon #CRS20
Hans: This Dragon will bring 4,000 lbs of payload back from ISS. #SpaceX #Falcon9 #Dragon #CRS20
Mike (weather): Wind is the prime factor tonight. Strong ground and Upper Level Winds tonight. #SpaceX #Falcon9 #Dragon #CRS20
Mike: Jet stream is overhead. Winds will stay up the next couple of days. #SpaceX #Falcon9 #Dragon #CRS20
Mike: For tonight, 60% chance of GOOD weather (not including Upper Level Winds). Winds have been lower than predicted today, so Mike thinks we're actually around 70% GO for tonight (not including Upper Level Winds). #SpaceX #Falcon9 #Dragon #CRS20
Mike: Upper Level Wind shear is predicted LOW risk tonight. #SpaceX #Falcon9 #Dragon #CRS20
Mike: Backup day Saturday: 90% GO forecast. LOW upper wind shear. #SpaceX #Falcon9 #Dragon #CRS20
The booster landing that "decided" to divert to the ocean did so because winds encountered were not winds predicted. "Not Mike's fault." We were "unfortunate that way we predicted that. We have better data. But doesn't apply for this landing." #SpaceX #Falcon9 #Dragon #CRS20
Hans: Doesn't think there's anything significant on this mission from Spacex to celebrate Dragon 1's retirement.

The exact launch times are:
Friday: 23:50:31 EST (04:50:31 UTC)
Saturday: 23:27:57 EST (04:27:57 UTC)
#SpaceX #Falcon9 #Dragon #CRS20
Hans: Aiming for Fall 2020 for first cargo-only launch of Dragon v2. #SpaceX #Falcon9 #Dragon #CRS20
Hans: At least Demo-2 and PCM-1 (maybe PCM-2) will fly before the commercial crew mission with Axiom. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Almost doe with crew Dragon parachutes. 1 of 3 tests done. #SpaceX #Falcon9 #Dragon #CRS20
Hans overviewing all that things they've learned from Falcon 9 and Dragon. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Never give up on diligence. That's how you keep program's going. #SpaceX #Falcon9 #Dragon #CRS20
Joel: No firm departure date. About 30 days. #SpaceX #Falcon9 #Dragon #CRS20
Joel: Not flying crew supplies for Demo-2. #SpaceX #Falcon9 #Dragon #CRS20
Hans: No firms plans on what to do with this Dragon when it comes home. #SpaceX #Falcon9 #Dragon #CRS20
Hans detailing how SpaceX tests all of its software to ensure it's all working as designed. #SpaceX #Falcon9 #Dragon #CRS20
Hans: The 2nd stage grey stripe on a past mission worked as designed to keep propellant at temperature for long-coast missions. Also, SpaceX can fly up to 3 or 4 Dragons in orbit at the same time. #SpaceX #Falcon9 #Dragon #CRS20
Hans: Ground wind limit is direction dependant but "around 34-35 mph-ish. #SpaceX #Falcon9 #Dragon #CRS20
Hans: "It's not just the upper level wind speed, it's also shear AND prediction of shear." #SpaceX #Falcon9 #Dragon #CRS20
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Chris G - NSF
@ChrisG_NSF
Getting ready for @NASA's & @BoeingSpace's teleconference for #Starliner updates now that the Independent Review Team has finished their report. Thread:
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Chris G - NSF
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Here's the statement on @BoeingSpace #Starliner issue & formation of an independent investigative board of issues on #OFT mission last month.
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Chris G - NSF
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NASA and @BoeingSpace are about update media the #Starliner Pad Abort Test from Monday. Stand by for updates....
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