Update README.md

README.md

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 # Pi_WXRX
 Receive and decode NOAA satellites with a Raspberry Pi.
+
+This requires the following:
+* Osmocom RTLSDR library: https://github.com/osmocom/rtl-sdr
+* PyPredict: https://github.com/osmocom/rtl-sdr
+
+To begin please run get_tle.py, preferably add it to a daily cron task. Afterwards run "bash sats.sh NOAA-##" for NOAA-15, -18, or -19 (your preference).
+
+Occasionally things will get backed up and its best to clear everything in the pending At jobs with the following command:
+   for i in `atq | awk '{print $1}'`;do atrm $i;done