Syntax of SP3 File Header Comment Lines

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/* PCV:IGS05_1400 OL/AL:FES2004  NONE     YN ORB:CoN CLK:CoN

   - format: ('/* PCV:',a10,' OL/AL:',2(a8,1x),2a1,' ORB:',a3,' CLK:',a3)
   - Models applied during estimation of satellite orbits & clocsk
        - PCV  : Antenna calibration model used 
        - OL/AL: Ocean & atmosphere tidal loading models plus CMC flags:
                    OL_MODEL AL_MODEL FF               
             - OL_MODEL: Ocean tide loading model  or  COMBI or NONE
                    COMBI is given if not all AC submissions have used the same
             - AL_MODEL: Atm tidal loading model  
                    (e.g. S1S2, or NONE ) -- NOTE: NOT CURRENTLY USED
             - FF  : two flags to report if CMC is included in the model (Y or N)

   - Corrections applied during generation of SP3 crust-fixed orbits
        - ORB: CoN if CMC are corrected for applied loading models
               CoM otherwise
        - CLK: CoM or CoN or CMB or N/A;
               CoN if staco are fixed to ITRF during CLK adjustment
               CMB (for Combi) is given if not all AC submissions have used the
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Examples from AC Final SP3 files for week 1459:

CODE:
/* PCV:IGS05_1455 OL/AL:FES2004  NONE     YN ORB:CoN CLK:CoN
EMR:
/* PCV:IGS05_1402 OL/AL:FES2004  NONE     YN ORB:CoN CLK:CoN
ESA:
/* PCV:IGS05_1451 OL/AL:FES2004  NONE     YN ORB:CoN CLK:CoN
GFZ:
/* PCV:IGS05_1455 OL/AL:FES2004  NONE     YN CLK:CoN ORB:CoN
JPL
/* PCV:IGS05_1451 OL/AL:FES2002  NONE     NN ORB:CoN CLK:CoN
MIT:
/* PCV:IGS05      OL/ALL:FES2004    Y NONE         YN ORB:CoN CLK:CoN
NGS:
/* PCV:IGS05_1455 OL/AL:FES2004  NONE     Y  CLK:N/A ORB:CoN
SIO:
/* PCV:IGS05      OL/ALL:FES2004    Y NONE         YN ORB:CoN CLK:CoN

IGS combination:
/* PCV:IGS05_1455 OL/AL:FES2004  NONE     Y  ORB:CMB CLK:CMB

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