| 1 (2) | National Aeronautics and Space Administration * | USA |  |
| 2 (4) | National Oceanic and Atmospheric Administration | USA | |
| 3 (10) | NASA Goddard Space Flight Center | USA | |
| 4 (12) | National Center for Atmospheric Research | USA | |
| 5 (37) | NASA Langley Research Center | USA | |
| 6 (42) | Jet Propulsion Laboratory | USA | |
| 7 (73) | US Environmental Protection Agency | USA | |
| 8 (89) | NASA Ames Research Center | USA | |
| 9 (90) | United States Department of Agriculture | USA | |
| 10 (95) | Pacific Northwest National Laboratory | USA | |
| 11 (117) | United States Geological Survey | USA | |
| 12 (145) | Lawrence Berkeley National Laboratory * | USA | |
| 13 (161) | NASA Marshall Space Flight Center | USA | |
| 14 (166) | Oak Ridge National Laboratory | USA | |
| 15 (180) | U.S. Department of Energy * | USA | |
| 16 (274) | NASA Goddard Institute for Space Studies | USA | |
| 17 (292) | Brookhaven National Laboratory * | USA | |
| 18 (318) | Smithsonian Institution * | USA | |
| 19 (368) | US Naval Research Laboratory | USA | |
| 20 (370) | Argonne National Laboratory | USA | |
| 21 (468) | Los Alamos National Laboratory * | USA | |
| 22 (491) | Lawrence Livermore National Laboratory * | USA | |
| 23 (575) | Harvard-Smithsonian Center for Astrophysics | USA | |
| 24 (592) | U.S. Air Force | USA | |
| 25 (624) | U.S. Army * | USA | |
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