MODIS daily satellite images

[PathfinderNI]

Don't know how many of you look at these satellite pictures on a regular basis, but I've noticed that every other day the picture for that day is blurry. Anyone know why that is? I figured there were possibly two different satellites taking pictures and with the rotation schedule it worked out to each one taking pictures every other day. Something is definitely wrong with the one that's taking the blurry ones!