B8 Patch Projected launch date is 21 Oct 99. This is the first of the last four remaining DSCS III satellites. They have been modified for the Service Life Enhancement Program (SLEP). The purpose of SLEP is to enhance the performance of all six channels to a minimum level of 50 watts of power output. In conjunction with this performance enhancement effort, each SLEP satellite will be modified with improved Low Noise Amplifiers (LNAs) which will minimize the re-radiated noise from low Effective Isotropic Radiated Power (EIRP) uplink limited tactical users.