On Orbit Performance of IRS1A 40 Ah Nickel Cadmium Batteries

The first Indian Remote Sensing Satellite IRS 1A was launched on March 17, 1988. The energy storage for this spacecraft was by two 40Ah nickel-cadmium batteries operating between 7% to 8% DOD. The performance of these batteries show marginal degradation over the 3 year mission life.