The Pod Bay

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geoffc

01:03

@uhoh Garmin boat style radar. They think it is for weather as well as airspace incursions.

StarHopper was the first vehicle they flew once really to 150m on one Raptor. Then they left it parked and added speakers, and cameras and now radar on top.

It 20-25m tall and just sitting there, so why not?

That is an old pic. Launch mount on the left. Zoom into the pic. White thing, T shaped is the Garmin brand (Really it says Garmin on it) boat radar.

uhoh

01:21

@geoffc the radar on top reminds me of this, so it indeed turns out to be comical

1 hour later…

geoffc

02:34

Yep. And it seems like they blew it off since they were up there today replacing it.

4 hours later…

Guru Vishnu

07:03

@uhoh: Hi. You might want to make your question - Do crew movements or movement of other objects ever affect space or Earth observation experiments staged on the outside of ISS? standalone since the comments below the linked Physics.SE question were deleted some time ago. Some of them were not answers and added something useful to the post including the fact about NICER telescope.

uhoh

08:01

@GuruVishnu I've edited and removed the reference to the now-deleted comment, thank you for your suggestion!

5 hours later…

geoffc

13:16

Re: Garmin radar - FCC application:

fcc.report/ELS/Space-Exploration-Technologies-Corp/…

Money quote: New experimental in 9300-9500 MHz to deploy an ocean surveillance system to verify boats and ships are not at excessive risk from a launch.

This radar will be attached to the top of a water tower and is masked between 164 to 290 degrees to avoid illuminating launch or test vehicles. Please note that a TFR will be in place when the radar is operating.

Thoughts from a poster on Super Heavy and supporting a fully fueled upper stage near end of flight, when it has 15% fuel left and is generating 3-4G of thrust.

Numbers for 4g max axial accel:

Assumptions:
- SS mass at launch : 1470 tonne
- SH mass interstage : 7 tonne
- SH mass CH4 tank : 35 tonne
- SH mass remaining CH4 : 108 tonne (assumes we reach max 4g accel with 15% fuel remaining then throttle)
- mass on top of SH LOx Tank : 1692 tonne

Approach:
- calculate SH ullage pressure required to keep tank wall compression equal to zero.
- calculate SH pressure at bottom of tanks and associated tank wall thickness required.