The E10-SPC from Quartzlock is a Space Qualified Rubidium Atomic Clock with an output frequency of 10 MHz and a phase noise of up to -150 dBc/Hz (10 KHz). The atomic clock has frequency stability of 3.00E-12 (1sec) and drift of 1.00E-13 per day. It has a mass of 5 Kg and measures 200 x 100 x 100 mm. The atomic clock is suitable for satellite navigation systems, intelligence reconnaissance satellites, military communication satellites, deep-space surveys, and space stations.