Notice the first character in the images filename. It is a 1 or a 2.
That means rover 1 or rover 2.
Opportunity is rover 1
Spirit is rover 2
The letter after the number, tells you what camera made the picture,
P=Pancam, N=Navcam, F=Fwd Hazcam, etc.
I took a random image from each of the cameras that send back photographs.
Rover 1, Forward HAZCAM, NAVCAM, PANCAM, Rear HAZCAM, Microscopic Imager.
Rover 2, Forward HAZCAM, NAVCAM, PANCAM, Rear HAZCAM, Microscopic Imager.
They have been there for over 1400 Sols.
That's a lot of cameras, that's also a lot of pictures.
