Arctic upper air data, courtesy Jon Kahl, UWM
ISWS 50-Year Radiosonde Archive, Illinois State Water Survey
RAOB Server, NOAA/FSL
Information from NWS on the National Weather Service Upper-air Observation Program
Comprehensive Aerological Reference Data Set (CARDS), NOAA/NCDC
The CODIAC System, UCAR/NOAA Joint Office for Science Support
GOES Satellite Images, NOAA Geostationary Satellite Server
U.S. Tropical Satellite Imagery , Florida EXPLORES!
Stratosophere-Oriented Server, Creighton University
Unidata Searchable Station List
Station ID list used for CUDOS sounding generation