9 ELECTRONIC PHOTOGRAPHIC APPARATUS, DIGITAL DATA RECORDERS, DIGITAL DATA TRANSMITTERS FROM SATELLITE TO GROUND, DIGITAL DATA RECEIVER SATELLITES, ELECTRONIC IMAGE DATA PROCESSING APPARATUS, AND MEDIA FOR IMAGE DATA, NAMELY, PRERECORDED FLOPPY COMPUTER DISKS, COMPUTER DISK CARTRIDGES, COMPUTER TAPE CARTRIDGES, VIDEO DISKS AND COMPACT DISKS FEATURING DIGITAL SATELLITE IMAGERY