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Army\/Navy\/Air Force Satellite Information System 2 (ANASIS-II), previously named KMilSatCom-1, is a secure communications satellite for the South Korean Agency for Defense Development. The spacecraft is the first dedicated South Korean military communications satellite. It supplements the Koreasat-5\/ANASIS-I satellite, a combined civilian and military communications satellite launched in 2006.<\/p>\n
South Korea\u2019s Defense Acquisition Program Administration contracted with Lockheed Martin for the satellite, as part of a package for Lockheed Martin\u2019s F-35A combat aircraft. Lockheed Martin then subcontracted the construction of the satellite to Airbus Defence and Space. The satellite was shipped from the Airbus satellite factory in Toulouse, France to Cape Canaveral on June 8th.<\/p>\n
The ANASIS-II spacecraft is based on Airbus\u2019s Eurostar E3000 satellite bus, over 80 of which have been ordered for various communications missions. While the mass of ANASIS-II is classified due to its military mission, other E3000 satellites range from 4500 to 6500 kilograms at launch.<\/p>\n
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<\/p>\nThe ANASIS-II satellite is shipped from Airbus Defence and Space in Toulouse, France to be prepared for launch at Cape Canaveral \u2013 via Airbus<\/p>\n
ANASIS-II was deployed into a geostationary transfer orbit (GTO) by its Falcon 9 launcher. The satellite will now utilize its own propulsion to maneuver into its operational geostationary orbit. In the past, geostationary communications satellites made up the bulk of SpaceX\u2019s commercial launch manifest, but ANASIS-II was SpaceX\u2019s first GTO mission of 2020.<\/p>\n
The Falcon 9 first stage that launched ANASIS-II is B1058.2, the second flight of the booster which launched Bob Behnken and Doug Hurley on the Demo-2 mission from LC-39A. The stage successfully completed a static fire test at SLC-40 on Saturday, July 11 at 6:00 PM EDT.<\/p>\n
NASA mission patches
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Initially planned to launch on July 14, SpaceX teams stood down in order to evaluate a potential hardware swap on the second stage. The technical issue was addressed, and the new launch date of July 20 was established.<\/p>\n
When the ANASIS-II mission lifted off, the B1058 booster broke multiple turnaround records. SpaceX\u2019s booster turnaround record was previously held by B1056, which launched the 5th Starlink mission just 62 days, 14 hours, and 55 minutes after launching the JCSat-18\/Kacific-1 mission. The time between Demo-2 and ANASIS-II was just 51 days, 2 hours, and 8 minutes.<\/p>\n
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<\/p>\nB1058, the booster assigned for ANASIS-II, aboard Of Course I Still Love You following the Demo-2 mission \u2013 via SpaceX<\/p>\n
This also broke the overall turnaround record for an orbital rocket, previously held by Space Shuttle Atlantis. Atlantis launched on her first two missions, STS-51-J and STS-61-B, within just 54 days, 9 hours, and 14 minutes. After Monday\u2019s launch, B1058 now holds the record for shortest turnaround of a rocket between two orbital launches, ever.<\/p>\n
On launch day, the countdown begins 38 minutes before liftoff, when the SpaceX launch director gives the go for propellant load. If all conditions are clear to proceed, fueling begins three minutes later and 35 minutes before launch, when RP-1 fuel begins flowing into Falcon 9\u2019s first and second stages, and liquid oxygen begins loading into the first stage. At T- 16 minutes, liquid oxygen also begins flowing into the second stage.<\/p>\n
Seven minutes prior to launch, the nine Merlin 1D engines on the first stage begin thermal conditioning in order to prevent thermal shock from the super cold propellants. One minute before liftoff, Falcon 9\u2019s onboard computers startup, taking control of the countdown and beginning to pressurize propellant tanks to flight pressures.<\/p>\n
At T- 45 seconds, the launch director verifies that all systems are go for launch. Main engine start is commanded three seconds before the vehicle lifts off from the pad.<\/p>\n<\/p>\n