cyanoacry

Thanks, updated! Please do CC me, as then I can vouch for where you came from :)

Thank you for the write-up! It's a little depressing (but not entirely surprising) to hear that you couldn't get folks excited about safety -- I work in the aerospace field, and our day-to-day is all about risk management: how, why, when. It's frustrating that high-reliability systems aren't seen as exciting when really they're what makes the magic run.

Best of luck, and I'm looking forward to your next venture!

Nice article! I used to work in this space (was formerly in charge of GNSS hardware at my company), and it's neat to see Galileo being put through its paces.

I see now that the US gets to take GPS (and the fact that the Air Force pretty much runs it single-handedly) for granted. We are seeing _some_ problems (like the GPS III block upgrade and OCX, ahah), but the org chart seems to be considerably simpler than what Galileo's got to deal with.

There are several I'm on (canard-aviators and gns480-users), and they've been active for something close to a decade. (And there are still emails every day!)

Frustratingly, both of these groups have great content (manuals, tips, documentation) uploaded to Yahoo Groups. It's going to be a real loss.

Neat work! Question from someone who's familiar with RF atomic clocks but not optical -- how do you steer a laser in frequency? For RF, it all comes down to VCOs: if you want a different tune range or different frequency, you just pick a different VCO.

But for lasers, I thought the frequency was driven by the energy difference between electron states for a given species? How do you synthesize an arbitrary frequency for a laser without something crazy like a FEL?

> There is no evidence the heat dissipated will impact lifespan.

I have to nitpick at this a little bit as a professional EE who works in high-reliability electronics. Wearout rates absolutely do depend on temperature (and thus heat), and thus the chips used here will have a shorter lifetime than those with active cooling. Now, whether that lifetime will be long enough for the common user is another question (maybe it's 1 million hours of life that get reduced to 100,000 hours, so not normally noticable).

There are a couple of counter examples, particularly in New Space startups. At 26, I was a Mission Director (SpaceX's equivalent to a NASA Flight Director) for Dragon re-entry and landing.

As the old Apollo-generation engineers start to retire in the space industry, there _is_ fresh blood coming in, and even at larger companies, I've found young folks in top positions. It's just not widely advertised.