#3 Update README

Author: astropenguin

README.md

@@ -1,2 +1,17 @@
 # rawdata
-:truck: DESHIMA raw data and downloader package
+DESHIMA raw data and downloader package
+
+# Usage
+
+```
+$ pip install deshima-rawdata
+$ deshima-rawdata download <obsid>
+```
+
+# List of raw data
+
+| Observation ID | File name | Source | Observation type |
+| --- | --- | --- | --- |
+| 20231108052231 | 20231108052231.tar.gz | Jupiter | contmap |
+| 20231109015146 | 20231109015146.tar.gz | Jupiter | zscan |
+| 20231109060113 | 20231109060113.tar.gz | Blank sky | skydip |