Setup/use stub README

README.md

@@ -5,6 +5,33 @@ This repo is a downstream port of STRF from proprietary pgplot
 to libre giza.
 
 
+# Setup
+Thus.
+
+```
+sudo apt install giza-dev git make gcc gfortran libpng-dev  \
+    libx11-dev libgsl-dev libfftw3-dev dos2unix unzip
+
+git clone https://spacecruft.org/spacecruft/strf
+cd strf/
+make
+sudo make install
+```
+
+
+# Use
+Example.
+
+With a `./tmp/` directory with filenames like this:
+`2023-01-20_000099.bin`
+
+
+Run:
+```
+./rfplot -p ./tmp/2023-01-20
+```
+
+
 # Upstream
 See `README-upstream.md`.