added remote k209 setup

README.md

@@ -0,0 +1,30 @@
+# radar_system
+
+Radar acquisition and processing system for single LibreVNA, synchronized
+multi-device LibreVNA, and Compact-M K209/S2VNA setups.
+
+Start here:
+
+- [Operation Modes](docs/operation_modes.md): what to run on each machine for
+  `librevna`, `librevna_multi`, and `compact_m_k209`.
+- [Run Config Reference](docs/run_config.md): `run_config.json` fields and
+  example files.
+- [K209 Setup](docs/k209_setup.md): S2VNA, VISA, K209 limits, smoke tests, and
+  Raspberry Pi remote mode details.
+
+Common local setup:
+
+```bash
+cd /path/to/radar_system
+python3 -m venv .venv
+.venv/bin/python -m pip install --upgrade pip
+.venv/bin/python -m pip install -r requirements.txt
+make
+```
+
+Run the GUI:
+
+```bash
+.venv/bin/python -m python_app.gui.main
+```
+