Appendix 1.  Summary of GAMIT Processing

A.1.1.  Data Preparation
Create an experiment directory with subdirectories for tables and each session (day)
Execute links.tables in the tables subdirectory 
Assemble RINEX (or FICA) files from diskettes, tape, and/or ftp
Prepare an L-file -- see Section 4.2
Enter antenna heights and receiver software versions in station.info
Enter scenarios in session.info (optional if running MAKEXP)
For each day:
Execute links.day
Run MAKEXP, or
	Create [day].makex.batch
Execute MAKEJ to get a J-file
Execute MAKEX to get X- and K-files
Check clock values in K-files with editor and CALCK
Create a G-file and T-file from IGS or broadcast information -- see Section 4.10

A.1.2. Obtaining an approximate solution for each day  (may be skipped if good a prioris
Create a D-file  d[expt][y].[day]  (created by MAKEXP)
Execute FIXDRV to get an I-file and batch files for a "quick" plus regular solution
 	Type of Analysis = 1-ITERATION
	Choice of Observable = LC_HELP
	Constrain coordinates of 3 or 4 fiducial sites
Possibly comment out regular-solution part of .bat file (after first SOLVE )
Execute b[expt].bat 
	( If starting from G-file only, ARC creates a T-file of satellite orbits and partials)
	( MODEL creates an "0" series [i. e., last digit of year] C-file for each site )
	( AUTCLN cleans the "0" series C-files and creates "a" series C-files )
	( CFMRG creates an M-file m[expt]1.[day] )
	( SOLVE estimates site and orbital parameters, updating m[expt]1.[day] and creating l[expt]a.[day], g[expt]a.[day], q[expt]1.day , and  o[expt]1.day.
	( Optional:  ARC creates a new T-file using the adjusted initial conditions
If regular solution not executed,
	Check q[expt]1.[day] to assure reasonable nrms ( <0.5 ) and orbital adjustments ( < 100 m)
	Use SCANDD, sortv, sorter, and/or CVIEW to detect problematic data.  Use sh_autedt to modify autcln.cmd to delete data flagged by CVIEW.
	Comment out quick solution and uncomment regular solution; execute  b[expt].bat.
If regular solution executed,
	( ARC creates an "a" T-file using improved initial conditions from quick solution)
	( MODEL creates a "b" series C-file for each site )
	( AUTCLN cleans the "b" series C-files and creates "c" series C-files )
	( CFMRG creates an M-file m[expt]a.[day] )
	( SOLVE estimates site and orbital parameters, updating m[expt]a.[day] and creating l[expt]b.[day], g[expt]b.[day], q[expt]a.day , and  o[expt]a.day.
Check q[expt]a.[day] to assure reasonable nrms ( <0.5 ) and orbital adjustments ( < 100 m)
Use CVIEW, SCANRMS, SCANDD and/or SCANM with m[expt]a.[day] to edit the data and write out clean "c" series C-files, or execute the second iteration with a second pass of AUTCLN after modifying the autcln.cmd file to correctly edit problematic data.

A.1.3.  Obtaining a high-accuracy solution with good a prioris
 Execute FIXDRV with  Type of Analysis = 0-ITERATION
Execute b[expt].bat 
	( MODEL creates a "0" series  C-file for each site )
	( AUTCLN cleans the "0" series C-files and creates "a" series C-files )
	( CFMRG creates an M-file m[expt]a.[day] )
	( SOLVE estimates site and orbital parameters, updating m[expt]a.[day] and creating g[expt]b.[day], l[expt]a.[day], q[expt]a.day, o[expt]a.day , and h[expt]a.day)
Check q[expt]a.[day] for good nrms (<0.3), small site and orbital parameter adjustments, and good ambiguity resolution
Verify quality of fit with CVIEW (using m[expt]a.[day]) and/or SCANM, SCANRMS, SCANDD
Use CTOX to create clean "c" (or "year") series X-files 
Delete the C-files to save disk space;  backup the original and cleaned X-files to tape.
Perform additional analyses with the cleaned X-files and the 1-CLEAN or 2-CLEAN type of analysis in sestbl.

A.1.4.  File-naming conventions

A - file:	ASCII version of the T-file (tabular ephemeris)
B - file:	controls the batch mode of data processing
C - file:	observed – computed (O-C's), partial derivatives
D - file:	driver file of sessions and receivers
E - file:	broadcast ephemeris, in FICA Blk 9 or RINEX navigation file format
G - file:	orbital initial conditions and non-gravitational parameter values
H - file:	adjustments and full variance-covariance matrix for input to GLOBK
I - file:	receiver clock polynomial input
J - file:	satellite clock polynomial coefficients
K - file:	values of receiver clock offset during observation span, from pseudorange
L - file:	station coordinates
M - file:	controls merging of data (C-) files for SOLVE and editing programs
N - file:	ASCII T-file in NGS SP #1 format for export
O - file:	record of the analysis (reduced form of Q-file) for post-processing analysis
P - file:	record of a MODEL run
Q - file:	record of the analysis (SOLVE run)
S - file:	station coordinates and antenna offsets — no longer used 
T - file:	tabular ephemeris 
V- file:	editing output of SINCLN, DBLCLN, and SCANRMS
W - file:	meteorological data
X - file:	input observations
Y - file:	satellite yaw parameters
Z - file:	water-vapor radiometer data

A.1.5.  Summary of input and output files

	INPUT	OUTPUT	
MAKEXP	- RINEX (or X-) files
- station.info
- session.info	- D-file
- session.info (optional)
- Input batch files for MAKEX, 
     MAKEJ, BCTOT	
MAKEJ	- E-file (RINEX nav file)
- C-file (optional--See 4.6)	- J-file (satellite clock file)	
MAKEX	
- raw observations (RINEX or       FICA)
- station.info (ant hts, rcvr
                            software) 
- session.info  (scenario file)
- E-file (RINEX nav file)
- J-file (satellite clock file)
- L-file (coordinates of 
                 stations)
	
- K-file (receiver clock)
- X-file (input observations)	
ARC	
- arc.bat (batch input file)
- G-file (orbital initial 
               conditions)
	
- arcout.ddd (output print file)
- T-file (tabular ephemeris for all sat. ses.)	
FIXDRV	
- D-file (defines the input and
                  output)
- sestbl.  (session control)
- .sittbl.  (site control)
- T, J, L, X (or C) input	
- B-file (bexpy.bat : primary
                batch file)
- B-file (bexpy.nnn : secondary
                 batch files)
- I-file (rcvr clock
                 polynomials)
	
MODEL	
- L-file (site coordinates)
- station.info (ant heights)
- X-file or C-file
- T-file
- I-file
- J-file
	
- C-file (upgrade if input 
                 C-file)	
AUTCLN
	
- C-file
 	
- C-file (cleaned)	
CFMRG	
- C-file
	
- M-file (points to the C-files)	
SOLVE	
- C-file
- M-file
	
- Q-file
- G-file  
- H-file
- L-file 	
CVIEW
SCANDD	
- M-file and C-files	
- C-files  (CVIEW only)

MAKEK	
- E-file
- J-file
- L-file
- X-file
	
- K-file	
BCTOT	
- E-file
	
- G-file
- T-file