AK_CHX: - UNKNOWN - UNKNOWN
http://anf.ucsd.edu/api/ta_prelim/rrd/plot/?sta=CHX&chan=np24&net=AK&tw=d
http://anf.ucsd.edu/api/ta_prelim/rrd/plot/?sta=CHX&chan=np24&net=AK&tw=w
http://anf.ucsd.edu/api/ta_prelim/rrd/plot/?sta=CHX&chan=np24&net=AK&tw=m
http://anf.ucsd.edu/api/ta_prelim/rrd/plot/?sta=CHX&chan=np24&net=AK&tw=y
http://anf.ucsd.edu/api/ta_prelim/rrd/plot/?sta=CHX&chan=np24&net=AK&tw=l