Polar is one of four spacecraft in the Global Geospace Science (GGS) program. These are among the spacecraft (Wind, Geotail, SOHO, and Cluster) in the International Solar Terrestrial Physics (ISTP) program. POLAR measures solar wind entry, ionospheric output, and the depositions of energy into the neutral atmosphere at high latitudes.
Elliptical OrbitSoyuz TM-23 was the 25th mission and the 21st long-duration expedition to Mir space station. It was also a part of the US/Russian Shuttle-Mir Program. The mission began on February 21, 1996, 12:34:05 UTC, launching Commander Yuri Onufrienko and Flight Engineer Yury Usachov into orbit. They docked with Mir two days later. During their stay there, cosmonauts performed several EVAs and various scientific experiments. Station crew was visited by several Progress resupply spacecrafts, STS-76, and welcomed aboard Soyuz TM-24 with the next expedition crew. The mission concluded with a safe landing back on Earth on September 2, 1996, 07:41:40 UTC.
Low Earth OrbitGonets- satellite were the civilian derivate of the military Strela-3 satellite system. The Gonets system was offered to support international health organizations to meet their global communications needs for the transfer of medical data and records to remote sites. Strela-3 was the second generation of Russian strategic store-dump military communications satellite. Development of this generation to replace the first generation Strela-1M and Strela-2M satellites began in 1973.
Low Earth OrbitNEAR (Near Earth Asteroid Rendezvous) was a mission to rendezvous and orbit around an near earth asteroid (433 Eros). On the cruise to Eros, it flew by asteroid 253 Mathilde on 27 Jun 1997 and flew by earth on 23 January 1998. After failing to insert itself into Eros' orbit in January 1999, NEAR finally inserted itself into orbit around the asteroid on the second try on 14 February 2000. Initially in a 323 km × 370 km orbit, it lowered its altitude during observation. After reaching orbit, NEAR was renamed NEAR-Shoemaker.
Heliocentric N/A