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BEGIN:VEVENT
SUMMARY:Atlas V 551 • Amazon Leo
DTSTART;VALUE=DATE-TIME:20251215T083500Z
DTEND;VALUE=DATE-TIME:20251215T083500Z
UID:182493762404
DESCRIPTION:A United Launch Alliance Atlas V rocket\, designated AV-10?\, 
 will launch a batch of 27 operational satellites for the Amazon Leo conste
 llation. The mission is known as Leo 4 by ULA and LA-04? by Amazon. Total 
 payload mass will be 15422kg. Atlas will deploy the satellites in an initi
 al orbit of 450km altitude\, the satellites will then use their electric p
 ropulsion systems to settle into their assigned final orbits. The Amazon L
 eo constellation will enable Internet service for customers between 56 deg
 rees north and south latitude. Atlas will fly in the 551 vehicle configura
 tion with a five-meter medium length fairing\, five GEM-63 solid rocket bo
 osters and a single-engine Centaur upper stage.\n\nMission profile video: 
 https://youtu.be/ZATwTLIbQu8\n-\nOperational satellites of the Amazon Leo 
 constellation (formerly known as Project Kuiper) are a significant upgrade
  from the two prototype satellites of the Kuiper Protoflight mission. The 
 ~572kg satellites are equipped with Hall-effect thruster technology for pr
 opulsion. They feature improved systems and sub-systems on board\, includi
 ng phased array antennas\, processors\, solar arrays\, propulsion systems\
 , and optical inter-satellite links. In addition\, the satellites are coat
 ed in a dielectric mirror film unique to Amazon Leo that scatters reflecte
 d sunlight to help make them less visible to ground-based astronomers. Ama
 zon Leo is planned to work in concert with Amazon's network of 12 satellit
 e ground station facilities. In addition to connecting to ground stations\
 , satellites will interconnect via optical infrared laser connections. Ama
 zon refers to this technology as OISL (optical inter-satellite link).\nThe
  Amazon Leo constellation is planned to consist of 3236 satellites operati
 ng in 98 orbital planes in three orbital shells\, one each at 590km\, 6
 10km and 630km orbital altitude. Kuiper satellites will fly in mid-inclina
 tion orbits\, enabling Internet service for customers between 56 degrees n
 orth and south latitude. Phase 1 of deployment will be 578 satellites at 6
 30km altitude and an orbital inclination of 51.9 degrees. A total of five 
 phases of constellation development are planned.\n\n\nWebcast: \nhttps://
 www.ulalaunch.com/missions/next-launch\n\nhttps://spaceflightnow.com/
LOCATION:Cape Canaveral AFS Launch Complex 41\, Titan III Rd\, Titusville\
 , FL 32780\, USA
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