software installation for radiosonde monitoring

Well, gave up on windows. Here is Perplexity's suggestion for OSX:

To monitor Vaisala RS41 radiosonde data using an SDR on a Mac, you can use native macOS applications and tools. Below are the step-by-step instructions to set up and use this setup:

### Step 1: Hardware Setup
1. **SDR Device**: Ensure you have a compatible SDR device, such as an RTL-SDR dongle, connected to your Mac.

### Step 2: Install Required Software
1. **Install Homebrew** (if not already installed):
- Open Terminal and run:
```bash
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
```

2. **Install GQRX**:
- GQRX is a software-defined radio application that works on macOS.
- In Terminal, run:
```bash
brew install gqrx
```

3. **Install Python and pip**:
- In Terminal, run:
```bash
brew install python
```

4. **Install `rs` (Radiosonde decoder)**:
- This is a Python-based tool for decoding radiosonde data.
- In Terminal, run:
```bash
pip install rs
```

5. **Install SoX (Sound eXchange)**:
- SoX is a command-line utility that can be used to route audio.
- In Terminal, run:
```bash
brew install sox
```

### Step 3: Configure GQRX
1. **Open GQRX**:
- Launch GQRX from your Applications folder.

2. **Set Up GQRX**:
- Select your SDR device from the "Input" section.
- Set the frequency to around **403.0 MHz** (common frequency for RS41 radiosondes).
- Set the mode to **NFM** (Narrowband FM) and adjust the bandwidth to about **12.5 kHz**.
- Click on "Start" to begin receiving signals.

3. **Configure Audio Output**:
- In GQRX, go to the "Audio" tab and select "Default" as the output device.
- Ensure the audio is being routed to the system's default audio output.

### Step 4: Route Audio to `rs` Decoder
1. **Use SoX to Route Audio**:
- Open Terminal and run the following command to route audio from GQRX to the `rs` decoder:
```bash
sox -t coreaudio "GQRX" -t wav - | rs -d -f wav -
```

### Step 5: Start Decoding
1. **Start Tracking**:
- The `rs` tool will start decoding the audio stream from GQRX and display the decoded telemetry data in the Terminal.

### Additional Tips
- Ensure your SDR antenna is suitable for the 400 MHz range.
- Check local regulations regarding the reception of radiosonde signals.
- Be patient, as you may need to wait for a radiosonde launch in your area.

With these steps, you should be able to monitor Vaisala RS41 radiosonde data using native macOS applications and tools. If you encounter any issues, please feel free to ask for further assistance!

Citations:
[1] https://sites.willamettevalleymesh.net/K9RCP/Radiosonde/Manuals/Rs41%20Tracker%20User%20Manual.pdf
[2] https://www.rtl-sdr.com/rs41-radiosonde-tracking-software/comment-page-151/
[3] https://www.dxzone.com/dx33207/rs41-radiosondes-tracker.html
[4] https://www.reddit.com/r/RTLSDR/comments/12lcwnc/rs41_tracker_problems/
[5] http://escursioni.altervista.org/Radiosonde/

That is option 1, installed and seems to work (although it does some weird stuff to run on non-Intel CPU)