Proba-3's Occulter will blot out the sun to create eclipse-like effect Coronagraph can observe
India’s space agency last week launched a pair of European Space Agency satellites that will hopefully demonstrate high-precision formation flight techniques that make it possible to create “virtual satellites”.
That’s when the real fun begins because Proba-3’s payloads – the Coronagraph and Occulter spacecraft - are designed to fly in formation with arc-second precision. Angles are measured in degrees, each of which can contain sixty minutes, and each minute has 60 seconds. These satellites are therefore required to maintain positions relative to each other that ensure their relative angles differ by tiny distances.
The duo will alternate between flying in tight formation for six hours before passively drifting to conserve fuel – demonstrating acquisition, rendezvous, proximity operations, formation flying, separation and convoy flying every orbit.
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