Scott Tilley

Wondered about where #Artemis1's antenna(s) are?

Wonder no more. There are four equally spaced around the capsule.

Learn More 🧵⬇️

Nov 21, 2022 at 4:43amMastodon Twitter Crossposter
Show threadScott TilleyNov 21, 2022
Ball Aerospace built the four Phased Array Antenna (PAA). The PAA serves as a primary data and voice communication link for NASA astronauts across all mission phases from launch through flight operations and final capsule recovery.
Show threadScott TilleyNov 21, 2022
Here you can see the antennas during the construction and testing of the Orion capsule with the outer coverings off. They are placed at 90° spacing around the capsule to provide coverage at most orientations using their electronically steerable Phased Array Antennas (PAA).
Show threadScott TilleyNov 21, 2022
This in contrast to the bulky Apollo solution of four dish antennas in an array to provide high gain communications that required a mechanism to aim it...
Show threadScott TilleyNov 21, 2022
Here's some details on how #Artemis1 Orion communicates home using both the NEAR and DEEP Space Networks.
Show threadScott TilleyNov 21, 2022

Antennas or antennae?

I agree with this article when speaking of EM antennas.

https://www.rfvenue.com/blog/2016/03/02/technical-grammar-police-antennas-or-antennae

Technical Grammar Police: “Antennas” or “Antennae”?

Technical Grammar Police: “Antennas” or “Antennae”?

Show threadKristijan Conkas (M0NKC)Nov 21, 2022
@coastal8049 Everything would be so much simpler if only everyone used the correct term: aerials. 🙂
Show threadRene 🄲🄰🅅🄰🄲 SchickbauerNov 21, 2022
@coastal8049 I assume running a phased array uses a lot more power than the classical Apollo solution?
Show threadScott TilleyNov 21, 2022
@cavac I have no data to compare.