To see a list select here . The GPS 2-NN series orbits in six distinct planes that are about 60 deg apart. To see a list select here . Additional information is not available. 20 May Miscellaneous Items.
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.