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It's not going to be in a vacuum inside the payload shroud. There's air, and that air contains some amount of moisture. And Florida isn't known for its dry air
by Sharlin 3y ago
It's not going to be in a vacuum inside the payload shroud. There's air, and that air contains some amount of moisture. And Florida isn't known for its dry air (it was launched from Cape on a Falcon 9 – but French Guiana would hardly have been better in that respect).
> It was always expected that water could gradually build up and contaminate Euclid’s vision, as it is very difficult to build and launch a spacecraft from Earth without some of the water in our planet’s atmosphere creeping into it.
- nick238 3y agoSatellites are transported in very specialized containers that will often be purged with dry nitrogen. Then after encapsulation in the faring, conditioned air of whatever sort is pumped into the faring from rollout to launch. [Example air conditioning duct attached to a Thor-Agena](https://space.stackexchange.com/questions/39440/why-use-an-air-conditioning-blanket-instead-of-supplying-air-into-the-fairing https://space.stackexchange.com/questions/39440/why-use-an-a...)
- 0cf8612b2e1e 3y agoCan ice sublimate at these temperatures?