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monomania 2 days ago [-]
Slight aside, I remember reading a post here on HN; the poster said they created an astronav system for use with webcams and published the code on github, only to receive on knock on their door a little while later from somebody who explained that this code in fact violated ITAR restrictions and they needed to remove it.
So… while that’s true of most astronav systems to date (particularly the ones meant to be used during daytime, and especially with reference stars potentially near the horizon), I’m not sure that’s really a hard requirement.
If you restrict the domain to nighttime or exoatmospheric, a high-resolution wide-angle camera paired with an offline astrometry database has the makings of a strapdown astronav.
Widening the domain again, the natural motion of the vehicle is probably enough, when combined with inertial sensors to aid pixel-shift image stabilization, to achieve the same kind of processing gain as the older systems got with shutter-synchronous detection.
3eb7988a1663 2 days ago [-]
Would that hold up in court if the person were willing to challenge it? That seems a clear cut violation of that person's speech, but I guess anything for "national security".
schiffern 1 days ago [-]
US secrecy laws hold up in court. Just ask any contractor who accidentally brought home a classified document or three (and their name doesn't rhyme with Bonald Bump).
If you restrict the domain to nighttime or exoatmospheric, a high-resolution wide-angle camera paired with an offline astrometry database has the makings of a strapdown astronav.
Widening the domain again, the natural motion of the vehicle is probably enough, when combined with inertial sensors to aid pixel-shift image stabilization, to achieve the same kind of processing gain as the older systems got with shutter-synchronous detection.
Think that's an unfair restrictions on speech? Just wait until you hear about this: https://en.wikipedia.org/wiki/Born_secret