Remove white space at the beginning of lines
cat INFILE | sed ‘s/^[ \t]*//’ > OUTFILE
memstat
echo «::memstat» | mdb -k Page Summary Pages Bytes %Tot —————————- —————- —————- —- Kernel 2356318 17.9G 8% Defdump prealloc 375179 2.8G 1% ZFS 602721 4.5G 2% Anon 5160416 39.3G 18% Exec and libs 7942 62.0M 0% Page cache 19943103 152.1G 69% Free (cachelist) 82585 645.1M 0% Free (freelist) 569720 4.3G 2% Total 29097984 222G… Leer más: memstat »
SoapyRemote
https://github.com/pothosware/SoapyRemote/wiki
RTL-SDR Tutorial: Receiving NOAA Weather Satellite Images
Beginner – Antennas
Antenna size depends on the frequency you want to hear: higher frequency (bigger number) – smaller antenna.You need an antenna that receives signals from all directions – called omnidirectional.Materials make no difference: any type of wire is good, as long as it keeps its shape. Metal coat hangers are popular, multi-stranded or solid makes no difference. I’m… Leer más: Beginner – Antennas »
dump1090
https://github.com/mutability/dump1090 Changes required for Plane Plotter Mlat (multi-lateration) So that’s Malcolm’s version of dump1090 installed and running on your RPi. This version already incorporates the changes required for a Plane Plotter Mlat Ground Station. Run the new version of dump1090 by typing: ./dump1090 –interactive –net You should see the same display as before on the… Leer más: dump1090 »
Visualizing Ultrasound with Schlieren Optics Part I
Radio-Astronomy with RTL-SDR, RPi and Amazon AWS IoT
https://www.hackster.io/mariocannistra/radio-astronomy-with-rtl-sdr-rpi-and-amazon-aws-iot-45b617 http://rishi-patel.blogspot.com/2013/10/summary-of-horn-antenna-project.html
Build a Cloud Chamber
Nuclear Thermal propulsion
https://beyondnerva.com/nuclear-thermal-propulsion/ Unlike most things at Beyond NERVA, the nuclear thermal rocket (NTR) has been built and tested by both the US and the USSR. Both programs looked at a solid core NTR, the simplest type of nuclear rocket. In a nuclear thermal rocket, the heat from a reactor is used to directly heat a propellant,… Leer más: Nuclear Thermal propulsion »