A new method of constellation design based on combining repeating ground
tracks with common ground tracks and/or sun-synchronous orbits is used
for performing high-precision change detection imagery for longer periods
of time while minimizing battery usage. By precisely prescribing the
orbital parameters, sharpened change detection images may be taken
without the need to process out blurring by any special image re-working
software. The relationship between the orbital parameters of the
satellites is precisely tuned to the earth's rotation rate for the
altitude of the satellites. The unique set of earth orbits minimizes
satellite battery requirement while optimizing the ability to perform
coherent change detection (CCD).