EROS A is the first in a constellation of sun-synchronous, polar-orbiting satellites  deployed by ImageSat. Successfully launched on December 5, 2000, EROS A has been commercially operational since January 1, 2001. The satellite's weight at launch was 250 kg.   EROS A is equipped with a camera whose focal plane of CCD (Charge Coupled Device) detectors produces a standard image resolution of 1.9 meters with a swath of 14 km at Nadir (perpendicular to the surface) at an altitude of ~500 km.The data transmission rate is 70 Mbit/s. The anticipated lifespan of the EROS A satellite is fourteen years.