Global Positioning System satellites useful for navigational purposes and geodetic studies. 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.
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. Mr. Walter I. Nissen of the National Capital Astronomers for the following list compiled by him on 14 July 1996. Objects were observed during 1994-1996 by Walter I. Nissen, Jr., CDP, at latitude 41 N. Mr. Nissan is grateful for assistance from Goddard Space Flight Center, Smithsonian Institution and National Capital Astronomers. This list supplements the similar list complied on 7 July 1994, by Mr. Nissen and reported in Spacewarn Bulletin 490 .