frayesto
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.
It requires real management and processes ahead of time, not after the fact.
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.
Is there a device that does all of this?
Then I submit it to scihub.
Best we can do these days
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
So it's a plus!
Is there anyone else with a better method?
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 trying to find the mass of the battery to compare the energy density to the Tesla battery packs
They have been great. In fact, right now USAA is in the subrogation process against the offending party for a claim on a bicycle.
I've been happy with their insurance products, their even better customer service, and have no plans of changing.
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.
You can see exactly what Signal is able to provide to a legal request. Time of last connection related to a phone number
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.
Only happened a few times and then all is good.
https://github.com/bitwarden/help/blob/master/_articles/impo...
This is a problem originally solved by Gauss for Ceres.
https://en.wikipedia.org/wiki/Gauss%27s_method
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.
A good introduction is the classic BMW
https://www.amazon.com/Fundamentals-Astrodynamics-Dover-Aero...
None of this requires the shape or material of the object, just some fuzzy measurements of the position
Anyone know of a bot that will send emails for messages in a room? I basically want to bridge a room with an already existing email list to send out announcements using Matrix.
So visualize the moving Earth in the center of each image with the other respective planet moving relative to the Earth. Since both are moving and rotating about the Sun we get these interesting motions with a lot of structure.
This is the theory of epicycles which was the main theory of the motion of the planets before the heliocentric view became prominent.
Is there a location where I can submit a bug report?
Most journals allow you to freely distribute pre-prints, and most researchers I know do this very frequently.
The entire scientific publication environment is quite convoluted but there is a large effort for open publications.
Articles are difficult to find because our university does not pay the subscription charges.
I need to publish my work in quality journals, all of which charge high publication charges. Some are even higher if you want a 'public access' option.
Luckily, there is a growing movement for open research and open publication. Many researchers, myself included, will publish pre-prints and papers to arxiv or self-host them on personal websites.
I'm extremely grateful for sci-hub and just hope I can help end this stifling of scientific research in my own way. All of my work ends up on github/arxiv for anyone to use.
It's all very fast and working quite well.
Make sense since that's how you sign into the Chrome app store to download the app.