C. Spacecraft Particularly Suited for International Participation Category I Spacecraft with essentially continuous radio beacons on frequencies less than 150 MHz, or higher frequencies if especially suited for ionospheric or geodetic studies. To see a list select here . Global Positioning System satellites useful for navigational purposes and geodetic studies. It provides many links to GPS related databases. Additional information is not available.
Some data are on line for electronic access.
Information on the current status of the instruments on board from the investigators will be most welcomed. This URL also enables executing several codes related to the orbits of many geocentric science payload spacecraft.