7kay · HackerTrans

NuttX runs on the ESP32[1] which provides a rather featureful shell[2] as well as a file system.

[1] https://nuttx.apache.org/docs/latest/platforms/xtensa/esp32/...

[2] https://nuttx.apache.org/docs/latest/applications/nsh/index....

7kay

5 年前議論

As others have already pointed out this exercise used a huge dish(a radio telescope[1]) and significant power. This is in no way an economically viable mode of communication. Using satellites in low earth orbit requires less power and a significantly smaller antenna. Putting LoRa on satellites has been done before, see e.g. [2].

[1]: https://en.wikipedia.org/wiki/Dwingeloo_Radio_Observatory

[2]: https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=4...

7kay

5 年前議論

No, the radio waves bounce off the moon's surface. The retroreflectors are not necessary for that, otherwise stuff like Earth-Venus-Earth bounces[1] would not be possible.

[1]: https://amsat-dl.org/en/earth-venus-earth-experiment-of-amsa...

7kay

5 年前議論

For reference (mostly for me as I need this from time to time), you can do the same on dpkg-based distros with

     $ dpkg -L imagemagick-6.q16 | grep bin
     /usr/bin
     /usr/bin/animate-im6.q16
     /usr/bin/compare-im6.q16
     /usr/bin/composite-im6.q16
     /usr/bin/conjure-im6.q16
     /usr/bin/convert-im6.q16
     /usr/bin/display-im6.q16
     /usr/bin/identify-im6.q16
     /usr/bin/import-im6.q16
     /usr/bin/mogrify-im6.q16
     /usr/bin/montage-im6.q16
     /usr/bin/stream-im6.q16

Similarly, you get

     $ dpkg-query -S /usr/bin/convert-im6.q16 
     imagemagick-6.q16: /usr/bin/convert-im6.q16

This does not work for the canonical executables though as they are just symlinks to /etc/alternatives/foobar

7kay

5 年前議論

May I ask what made you choose lazygit instead of fugitive? I'm using the latter and am quite happy with it, but I'm keen to learn what I'm missing out on.

7kay

5 年前議論

Do you use the native-comp branch of emacs? This probably doesn't make any difference when it comes to multithreading but it should make the experience a bit more smooth.

7kay

5 年前議論

You might want to consider using the BR2_EXTERNAL feature[1] to keep your customizations outside of the buildroot tree.

[1]: https://buildroot.org/downloads/manual/manual.html#outside-b...

7kay

5 年前議論

I guess this is a thing you could achieve with neovim-remote[1]. My main use case for it avoiding nested neovim processes in the inbuilt terminal, though

[1]: https://github.com/mhinz/neovim-remote

7kay

5 年前議論

Speyer has the Buran as well

https://speyer.technik-museum.de/en/spaceshuttle-buran

7kay

5 年前議論

The easiest way to leave the gray zone would be to get a ham radio license. Although this might vary from country to country, generally you are allowed to use selfbuilt transmitters in specific frequency ranges, which also includes noncertified hardware.

7kay

5 年前議論

They use GMAT, the General Mission Analysis Tool https://opensource.gsfc.nasa.gov/projects/GMAT/index.php

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