1. High Altitude Observatory, NCAR; Boulder Colorado USA
2. Institut d'Astrophysique et de Géophysique; University of Liège; Liege Belgium
3. Space Weather Prediction Center, NOAA; Boulder Colorado USA
4. University of Alabama at Huntsville; Huntsville Alabama USA
5. Institute for Scientific Research; Boston College; Chestnut Hill Massachusetts USA
6. Air Force Research Laboratory; Hanscom AFB Massachusetts USA