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Linux Ubuntu for Radio Astronomy: Common causes and fixes when you’re already in the dialout group but still get “permission denied” when accessing /dev/ttyUSB0
If you’re already in the dialout group but still get “permission denied” when accessing /dev/ttyUSB0, here are the common causes and fixes: 1. You need to log out and log…
Local Host URL
The localhost URL is typically “http://localhost” or “http://127.0.0.1“. This address allows your computer to communicate with itself, often used for testing web applications locally.
How to change from internal to external speakers on Dell Precision M6800 laptop
To make your Dell Precision M6800 automatically or manually switch from internal speakers to external speakers (e.g., via the 3.5mm headphone jack or external audio device), follow these steps depending…
Evidence for existence of dark matter
Evidence for dark matter comes from multiple, independent lines of observation across astrophysics and cosmology. Here are the main ones: 1. Galaxy Rotation Curves 2. Gravitational Lensing 3. Cosmic Microwave…
Linux Ubuntu for Radio Astronomy: ACM0 Service for PicoMuon
The error message: means that systemd can’t find a service file named PicoMuonACM0.service. To resolve this, you’ll need to create, place, or enable the service file correctly. Here’s how to…
Comparing image mosaic software for astrophotography
The best image mosaic software for night sky (astrophotography) mosaics depends on your goals, budget, and level of control needed. Here’s a curated list of the most recommended options for…
Reducing noise in radio telescope systems
Reducing noise in a 1420 MHz radio telescope setup (i.e., for detecting the hydrogen line) involves addressing both internal and external sources of interference. Here are the most effective steps…
Can 3dB amplifier compensate for 3dB loss in filter at 1420MHz?
If I use a filter at 1420 MHz that causes 3 dB loss and in amplifier beforehand that gives 3dB gain, will that cancel it out? Not exactly — a…
Using long Yagi antenna tuned for 1430 MHz for 1420 MHz
A long Yagi antenna tuned for 1430 MHz can still work at 1420 MHz, but with reduced efficiency and some detuning effects. Here’s a breakdown of what you can expect:…