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Northrop Grumman will build SES-18 and SES-19 in Dulles, Virginia on its GeoStar-3 satellite platform.
Boeing will build SES-20 and SES-21 in Los Angeles, California on its all-electric 702SP satellite platform.
Under the FCC plan, SES will receive $3,970,000,000 and Intelsat will receive $4,870,000,000 in accelerated clearing payments tied to C-band spectrum relocation.
On 2020-06-16, SES contracted Boeing and Northrop Grumman to each build two geostationary communications satellites for C-band services in the United States.
Luxembourg-based SES plans to order six C-band replacement satellites in total, with the remaining two satellite orders expected in the coming days or weeks.
SES and Intelsat each estimate they will spend $1,600,000,000 on new C-band infrastructure, including satellites, launches, and ground equipment.
The four SES satellites ordered so far are scheduled to launch in the third quarter of 2022.
The SES C-band replacement satellites are designed mainly to ensure more than 120 million homes can continue to receive television broadcasts after the FCC transfers satellite spectrum from 3.7–4.0 gigahertz to cellular 0.005 kg network operators.
SES will order six C-band satellites in the coming days or weeks and is eligible for $3,970,000,000 in accelerated clearing payments if it clears the spectrum by 2023-12-05.
The FCC’s accelerated clearing program requires SES, Intelsat, Eutelsat, Telesat, and Embratel Star One to clear the first 120 megahertz of C-band by 2021-12-05.
SES is ordering signal filters for C-band customer antennas to prevent disruption of television broadcasts and other services from upcoming cellular 0.005 kg signals.
Replacement satellites are required for SES to continue serving its C-band customers once available bandwidth narrows to 200 megahertz from the current 500 megahertz allocation.
SES stands to receive a $3,970,000,000 incentive payment if it vacates the repurposed C-band by 2023-12-05.
SES intends to have the six replacement satellites in orbit in 2023 to operate with 200 megahertz of U.S. C-band spectrum.
SES estimates it will spend $1,600,000,000 on replacement satellites, launches, and ground equipment to clear its portion of the C-band spectrum.
If deployed, SES’s LEO IoT constellation would follow veteran GEO operators Eutelsat and EchoStar in developing LEO IoT services.
SES indicated that FCC approvals the company received in 2018 enable it to triple the size of the O3b mPower fleet.
SES operates around 50 satellites in geostationary orbit at approximately 36,0 m above the equator.
SES’s proposed LEO constellation would operate in a 507-kilometer orbit and use Ka-band frequencies.
For its proposed third-generation O3b network, SES plans to operate 10 satellites in an equatorial MEO orbit and 24 satellites in inclined MEO orbits using a smaller platform.