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SpaceX launches fourth batch of SDA data transport satellites

Leading SDA's Tranche 1 deployment

The Space Development Agency (SDA) launched the fourth batch of Tranche 1 data transport satellites on Oct. 10. The 21 Northrop Grumman-built spacecraft bring the total on orbit to 84 of 154 planned operational satellites.

Updated Oct 26

Notable Quotes

This launch marks the delivery of satellites built by the third of four vendors selected to field Tranche 1 of the proliferated LEO architecture.

from SpaceX launches fourth batch of SDA data transport satellites · Updated Oct 26

It's one thing to go through launch and early ops of one, two, maybe even three or four satellites. Twenty-one is a completely different ball of wax.

from SpaceX launches fourth batch of SDA data transport satellites · Updated Oct 26