gpredict VS openJDK-docker

I didn't watch the video but Gpredict has tracking and a map showing the orbit path and ground footprint for satellites you select.

I'm using sdrpp with Doppler correction with gPredict. I record the signal in sdrpp and then process it with noaa-apt.

look at the source of http://gpredict.oz9aec.net/

Your missing the point basically they mean upgrade your software to Gpredict satellite tracking software (GPL) which has Linux and Windoze versions. http://gpredict.oz9aec.net/   Gpredict uses hamlib to control both radios and mounts. Hamlib supports many radios and mount support includes Meade, Celestron and iOptron IEQ45 alt-az mounts via AUSCOM standard software. Once done the next part is ensuring you set up you com ports to appropriately control your devices radio and mount and making sure the appropriate devices are set-up in the software. Note if your com ports change say because you replug something, don't forget to update the port details otherwise coms will fail and the relevant device won't be usable. Check out the documentation and there are a number number of set-up videos on YouTube if needed.

LWN usually has great content but they've missed out on so much free ham software in this article that I use regularly.

My main HF rig is an older Yaesu FT-950. I tapped the IF and brought it out of the chassis where it is plugged into a cheap RTLSDR. I then access that RTLSDR (with free drivers) with GQRX (free software for visualizing anything compatible with SoapySDR or GNU radio), and the result is that I get a panadapter that is arguably better than what's available on $2000 radios. Short video here: https://photos.app.goo.gl/uP9zMMbiiiSmHYvM8

As for VHF/UHF stuff, I would be hopeless if it wasn't for GPredict on my laptop making it simple to track LEO satellites. https://github.com/csete/gpredict Short video here: https://photos.app.goo.gl/eg87BWpt2XnJdGFp7

I also run an APRS igate, which is powered by direwolf: https://sielicki.github.io/posts/radio-scanner-aprs-igate/ , https://github.com/wb2osz/direwolf

It hasn't been updated in a couple years now, but `gpredict` is a nice desktop program that will show projections of satellite orbits and predict upcoming passes.

https://github.com/csete/gpredict

GPredict

Install OpenJDK and Java Runtime Environment (JRE) 11

Reloading is nothing new under the sun for Lisp, I believe. For ML and adequate reload-ability, one might be hard pressed, but it's nothing new under the Sun (hint, hint). Maybe too on the nose, but one probably wants good inlining, and thus more "speculative" de/optimisation to preserve redefinition.

If they don't want Oracle's Java, why can't they use a subset of OpenJDK (licensing noob here)?

I think they use a circular queue of functions that is each executed for around 100 ms. I am guessing the system timer is used to generate an interrupt that pauses execution of the current function and starts executing the next function. Apple's Java code is probably closed source. I did find mention of an openjdk here: https://openjdk.java.net. I haven't looked at the source code yet.

https://openjdk.java.net

$ yum info java-1.8.0-openjdk Available Packages Name : java-1.8.0-openjdk Arch : x86_64 Epoch : 1 Version : 1.8.0.322.b06 Release : 1.el7_9 Size : 314 k Repo : updates/7/x86_64 Summary : OpenJDK 8 Runtime Environment URL : http://openjdk.java.net/ License : ASL 1.1 and ASL 2.0 and BSD and BSD with advertising and GPL+ and GPLv2 and GPLv2 with : exceptions and IJG and LGPLv2+ and MIT and MPLv2.0 and Public Domain and W3C and zlib Description : The OpenJDK 8 runtime environment.

For the rest: -+ PIP3 & Python scripts: export REQUESTS_CA_BUNDLE=/path/to/your/certificate.pem python script.py -+ JAVA =java -D'javax.net.ssl.trustStore'="/opt/site/cacerts.JKS" .....= https://serverfault.com/questions/636612/preserve-imported-ca-certificates-through-java-upgrades/636882 https://github.com/docker-library/openjdk/issues/327 -+ Windows server https://docs.microsoft.com/en-us/troubleshoot/windows-server/identity/valid-root-ca-certificates-untrusted certutil .. root fg.cer