SpaceX Falcon 9 Block 5 - ANASIS-II - launch July 20, 2020
Screenshot from SpaceX Webcast of the launch of ANASIS-II
Mission Rundown: SpaceX Falcon 9 B5 - ANASIS-II
Written: July 29, 2021
Nobody knows anything over Korea
Monday, July 20, SpaceX launched a South Korean military communications satellite, ANASIS-II. Liftoff of the Falcon 9 Block 5 rocket occurred at 17:30 EDT - 21:30 UTC, half an hour into the launch window, after a short weather delay. The launch took place from SLC-40 at the Cape Canaveral Air Force Station in Florida. ANASIS-II will be delivered into a Geostationary Orbit (GEO) over the Korean Peninsula.
Booster B1058 was static fired on July 11, 2020. First flight of this booster was on DM-2 - SpaceX Demonstration Mission-2, launching NASA astronauts Bob Behnken and Doug Hurley to the International Space Station on May 30, 2020. Anasis-II will be B1058 second flight, which changes the booster’s designation to B1058-2.
About 210 seconds after launch the second stage will jettison its fairings. The fairings are expected to be recovered using SpaceX’s two recovery vessels: Go Ms. Tree and Go Ms. Chief. They were both caught in the nets.
After being jettisoned, the two fairing halves will then use cold gas thrusters to orientate themselves as they descend through the atmosphere. Once at a lower altitude, they will deploy parafoils to help them glide down to a soft landing either in the nets or in the ocean.
SpaceX is the first company to recover and reuse payload fairings. These are new Type 2.2 lifeboat sized fairings - 34 x 17 feet with 8 vents ports, a lowered square protrusion, a heat resistant thermal steel tip and acoustic tiles inside the fairings.
The Payload
ANASIS-II, previously known as KMilSatCom-1, is South Korea’s first pure military satellite. It was paid for by Lockheed Martin as part of an agreement in which the South Korean government purchased 40 F-35 fighter jets in exchange for a military communications satellite. This mission will end the country’s dependence on the Mugunghwa-5 satellite, which they currently use in conjunction with Korea Telecom.
Due to the sensitive nature of the satellite, not much is publicly known about it. We do, however, know that Lockheed subcontracted the spacecraft to Airbus, who have based it on their Eurostar E3000 satellite bus.
The spacecraft will be launched into a geostationary orbit over the Korean Peninsula to facilitate the needs of the country’s military in the region.
ANASIS-II being shipped from Airbus, Toulouse to SpaceX, Cape Canaveral prior to launch
While the mass of ANASIS-II is classified due to its military mission, other E3000 satellites range from 4500 to 6500 kilograms at launch.
ANASIS-II Geostationary slot or Station is believed to be anywhere on the 124° - 130° East longitude over the South Korean peninsula. It’s a military secret not disclosed, but this is a calculated guess from me.
Okay. I looked at the map. Happy now.
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