http://www.websdr.org/ A WebSDR is a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and tune it simultaneously. SDR technology makes it possible that all listeners tune independently, and thus listen to different signals; this is in contrast to the many classical receivers that are already available via the internet.
https://github.com/simonyiszk/openwebrx RASPBERRY 1 CHANGE IN MAKEFILE: csdr MakeFile PARAMS_NEON = -mfloat-abi=hard -mcpu=arm1176jzf-s -mfpu=vfp -funsafe-math-optimizations -Wformat=0 tnx Jan Szumiec for the Raspberry Pi support PARAMS_RASPI = -mfloat-abi=hard -mcpu=arm1176jzf-s -mfpu=vfp -funsafe-math-optimizations -Wformat=0
other
https://g8fek.com/lna.html
https://pictortelescope.com/ https://www.pictortelescope.com/observe PICTOR consists of a 1.5-meter parabolic antenna that allows anyone to make continuous and spectral (i.e. hydrogen line) drift-scan observations of the radio sky in the 1300~1700 MHz regime for free.
The half-wave dipole antenna is just a special case of the dipole antenna, but its important enough that it will have its own section. Note that the «half-wave» term means that the length of this dipole antenna is equal to a half-wavelength at the frequency of operation. To make it crystal clear, if the antenna is to radiate… Leer más »
cat INFILE | sed ‘s/^[ \t]*//’ > OUTFILE
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 »