1. National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO
2. DLR Plataforma Solar de Almerı´a, Apartado 39, Tabernas E-04200 Almerı´a, Spain
3. Kearney & Associates, P.O. Box 2568, Vashon, WA 98070
4. CIEMAT—PSA, Apartado 22, Tabernas E-04200 Almerı´a, Spain *
5. Duke Solar, 2101-115 Westinghouse Blvd., Raleigh, NC 27604
6. Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185