Rodnik, two Russian military communication satellites manufactured by the Reshetnev Information Satellite Systems JSC for the Main Intelligence Directorate of the General Staff of the Russian Armed Forces.
| Name of Satellite | Rodnik (Cosmos 2507, Strela 3M) |
| Purpose | Communications |
| Contractor | OAS ISS |
| Country of Contractor | Russia |
| Launch Mass (kg.) | 280 |
| Class of Orbit | LEO |
| Perigee (km) | 1 497 |
| Expected Lifetime (yrs.) | 5 |
| Date of Launch | 23.09.2015 |
| Launch Site | Plesetsk Cosmodrome |
| Launch Vehicle | Rokot |
| COSPAR Number | 2015-050A |
| NORAD Number | 40920 |
Communications Satellite are to provide communication to the Russian armed forces in the most remote areas where there are no traditional terrestrial communication channels. The Rodnik-S/Strela-3M satellite is expected to be used by military and civilian special services, as well as other government agencies
