gnss-sdr
gps-sdr-sim
| gnss-sdr | gps-sdr-sim | |
|---|---|---|
| 13 | 23 | |
| 1,479 | 2,528 | |
| 1.9% | - | |
| 9.0 | 3.9 | |
| 10 days ago | 21 days ago | |
| C++ | C | |
| GNU General Public License v3.0 only | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
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
gps-sdr-sim
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11 hour GPS/GNSS Simulation on a fixed point
Looking at the GitHub, I see the duration is defined by USER_MOTION_SIZE and can be specified in either dynamic or static mode. Can I get some insight on the benefits of using dynamic/static? I need to transmit a fixed GPS point, if that matters.
- My work is now requiring we share our location in order to clock in, and it prevents us from clocking in if we’re too far from work. I work from home.
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iOS allows DNS request to escape the VPN tunnel
> not trivial or cheap
It sounds like your experience may have been a while ago? In 2022, it is fairly trivial and cheap: https://github.com/osqzss/gps-sdr-sim
I can not ;^) personally confirm that this works with a HackRF, which is like $300, but probably with any other reasonable tx-capable sdr.
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Changing the header file
Link of the repository: GPS-SDR-SIM
GPS-SDR-SIM
- Looks like the 2 month limit might make Starlink useless for travellers ☹️ (feedback from another traveller’s question)
- GPS-SDR-SIM
- IQ data formats
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An EFF Investigation: Mystery GPS Tracker on a Supporter’s Car
> while spoofing GPS is significantly harder
You are completely, utterly wrong. Spoofing GPS is downloading a file, and then running a commandline program with a hackrf attached.
Download and compile https://github.com/osqzss/gps-sdr-sim
Download today's ephermis https://cddis.nasa.gov/archive/gnss/data/daily/
run:
gps-sdr-sim -e $EPHERMISFILE -l $LAT,$LON,$ALT
And, if you're nearby an airport, you're violating felonies with FCC AND FAA.
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Decoding captured signal of RTL-SDR by SoftGNSS
I want to simulate GPS signals by using GPS-SDR-SIM (GPS-SDR-SIM GitHub page)
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.
gnuradio - GNU Radio – the Free and Open Software Radio Ecosystem
SoftGNSS - UNOFFICIAL! Contains my little changes for my studies. Besides that, it is not branched from any official repo, is branched from a local PC.
AIS-catcher - AIS receiver for RTL SDR dongles, Airspy R2, Airspy Mini, Airspy HF+, HackRF, SDRplay and SoapySDR
unsmear - Converts to and from timescales with smeared leap seconds
RTLSDR-Airband - Multichannel AM/NFM demodulator
vswarm - vswarm: A ROS package to simulate and deploy vision-based drone swarms
airspy-fmradion - Software decoder for FM/AM broadcast radio with AirSpy R2 / Mini, Airspy HF+, and RTL-SDR
gnuradio-android - GNU Radio Android Toolchain
brainflow - BrainFlow is a library intended to obtain, parse and analyze EEG, EMG, ECG and other kinds of data from biosensors
gnuradio - GNU Radio