gnss-sdr
gnuradio
gnss-sdr | gnuradio | |
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13 | 1 | |
1,485 | 6 | |
1.9% | - | |
9.0 | 0.0 | |
about 23 hours ago | almost 2 years ago | |
C++ | C++ | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
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gnss-sdr
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Just scrolled past a certain sarcastic Flatwittoid poast about not beïng able to see satellites in photographs. The whole frame of this represents *one single pixel of a high resolution* image, & the smiley represents a satellite. Details inside.
You realise you can write software yourself to interpret the signals from GPS satellites? Here's an open-source implementation.
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Looking for someone with more experience in the flat earth debate that can review and expand my comment posted in the truckers subreddit.
Something I always enjoy pointing out is that GPS signals can be decoded by anybody, the source code is available here. Needless to say, there are references and calculations based on satellites all over it.
- Need some Guidance for Setup
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Calculating Position from Raw GPS Data (2017)
If you're interested in running some code, there's [1] which is fairly active, but as I recall is Linux only. There is also [2] which is a Matlab (or Octave) GNSS receiver implementation; quite well documented and informative. It's meant to be a companion to the author's book [3], which itself I found quite concise and approachable.
[1] https://github.com/gnss-sdr/gnss-sdr
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How do flat earthers think GPS works?
They like to pretend it is using towers or balloons or something else, none of them have ever coherently answered it with a viable way this could result in the GPS we can use from the device in our pocket. It also casually expands the circle of people involved in this conspiracy by thousands, to include all developers at Apple and other phone manufacturers that write/maintain the GPS components of their OS as well as contributors to open source projects like GNSS-SDR, an open-source software-defined GNSS receiver.
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How do Flat Earthers explain satellite radio and GPS?
People also have to write the software to compute your location from these broadcasts, this means basically every company that has produced GPS receivers would have to be in on it. But there's an open source one, surprisingly nobody has raised an issue as to why it contains all this weird code that doesn't make sense if it's not coming from a satellite.
- GPS Coordinates
- Output argument X not assigned in the execution with Y function
- GPS
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Using GPS-SDR-SIM
GNSS-SDR
gnuradio
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Trying to compile GNU Radio in Termux
I also did an implementation using ashmem, but that's probably not worth it.
What are some alternatives?
multi-sdr-gps-sim - multi-sdr-gps-sim generates a IQ data stream on-the-fly to simulate a GPS L1 baseband signal using a SDR platform like HackRF or ADLAM-Pluto.
SoapySDR - Vendor and platform neutral SDR support library.
gnuradio - GNU Radio – the Free and Open Software Radio Ecosystem
gnuradio-android - GNU Radio Android Toolchain
gps-sdr-sim - Software-Defined GPS Signal Simulator
trunk-recorder - Records calls from a Trunked Radio System (P25 & SmartNet)
AIS-catcher - AIS receiver for RTL SDR dongles, Airspy R2, Airspy Mini, Airspy HF+, HackRF, SDRplay and SoapySDR
gqrx - Software defined radio receiver powered by GNU Radio and Qt.
RTLSDR-Airband - Multichannel AM/NFM demodulator
libandroid-shmem - System V shared memory emulation on Android using ashmem.
airspy-fmradion - Software decoder for FM/AM broadcast radio with AirSpy R2 / Mini, Airspy HF+, and RTL-SDR