well, the kessler syndrome [1] is a real phenomenon and has real consequences. More satellites == more debris == high probability of collisions which can create a positive feedback loop.
It requires real management and processes ahead of time, not after the fact.
I'm interested and considering getting an amateur radio license.
It's not clear yet, but I wanted to get a single portable device that allows for reception of all the most important frequencies, which I think includes shortwave, HF, VHF, NOAA weather and the amateur radio bands.
Not sure what other people do, but I always publish at a journal then put my manuscript on arxiv, or whatever field equivalent, and then on my personal website.
There are closed form equations that can be used for the angular position of the sun, which will be more than accurate for this purpose.
Then it's mostly some simple trig to determine areas that have a line of sight to the sun.
I have this on my to-do list because in my bedroom on a full moon the light will come through one specific window onto our pillows. i wanted to automate either curtains or something to predict when it'll happen.
Maybe eventually I'll get around to something like this
I think what they are referring to is "angular momentum dumps". The reaction wheels have a fixed maximum amount of angular momentum. This is a function of the speed of the wheels themselves since the mass/moment of inertia is fixed.
Over time external forces continue to add momentum to the system (from drag/solar radiation pressure). In order to maintain a desired pointing direction this means the wheels must increase in velocity to "absorb" this momentum.
Eventually you need to "dump" the momentum using another external force, such as thrusters, or in this case the same solar radiation pressure.
Goal is to orient spacecraft such that external forces can be used to spin down the various reaction wheels, thereby "dumping" momentum out of the wheels.
This is pretty common on all spacecraft, but gets complicated/innovative when you have to do it in an emergency or if you don't have a full set of reaction wheels.
I'm not an expert and have forgotten most of my aerodynamics classes but I believe it's related to shockwave formation on the wing tips or possibly pitot tubes to measure airspeed as a function of pressure changes
All the three-letter agencies already knew they had these tools available, GPG, veracrypt, Signal, etc.
Now it's just impossible for governments to whole sale eavesdrop on conversations. If they want access it now has to be targetted, and most likely device specific which is harder.
Yes, the lastpass exporter has an issue. You can do a search and replace.
Or you can do what I did and when I reach a site that had an issue, I would just look at the password and there would be an obvious parsing error, e.g "&" is instead "amp&" and would just modify it manually.
More generally given sufficient observations one can use many similar methods of orbit determination to get a relatively accurate orbit of the body. All of this is standard stuff in astrodynamics and happens on a near constant basis for both man made and natural objects.
I bought it from an upperclassman for 25 cents.
Still on my shelf and I used it to design my own astrodynamics course to teach during grad school.