MER Raw Image Naming System

Can anyone shed light on the naming system JPL uses for their raw image
filenames? This is what I have figured out on my own:

Eg: 2 P 126553081 ESF 0200 P 2100 L6 M1 .JPG

2 = MER-2 (Spirit aka MER-A)

P = Pancam

9-digit decimal number = seconds since Jan 1, 2000
so: '126553081' would be 4-Jan-04 17:36. (4 hours slow though ??)

ESF/EFF/EDS = ? -- I note EFF is the predominant type; files are larger

4-digit decimal number = ? ('0200' in this case)

P = ?

4-digit decimal number = ? ('2100' in this case)

L = Left 'eye'
6 = Filter number 6

M1 = ? (I don't think Mer-1, as that is Opportunity)

Thanks for any insight.

Mark

PS Thanks v. much Joe for filter information...


"Joe Knapp" wrote in
gy.com:

....

There is in that collection a series of shots of the color wheel, with
file names:

http://marsrovers.jpl.nasa.gov/galle...53017ESF0200P2
100L2M1.JPG

....
That is a series of three shots, from MER 1 (M1), left camera (L),
filters L2, L5 and L6 which is roughly red, green, blue.