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The tdsolve program reads the database file (hd,or,dt) created by mergedb and does a Triple Difference solution to improve the coordinates in the .POM files. The user can omit stations from the Triple Difference solution if he wants the coordinates in those .POM files to remain unchanged. The program can do an L1,or ion-free Triple Difference solution. Whatever station is chosen as the "reference station" in tdsolve.inp, that station's coordinates will be used to solve for the coordinates of the other stations (except for the omitted stations). The tdsolve program will iterate until the coordinate shifts fall below the 1 centimeter level. The program creates a tdsolve.sum file that shows the coordinate shifts (adjustments) for each iteration, for each station being solved for. The program reads a control file called tdsolve.inp. An example is given below
aazz00 3 nbs5 2 east west
where:
| aazz00 | combined database name from mergedb |
| 3 | frequency of the triple difference solution |
| nbs5 | name of the reference station (coordinates known) |
| 2 | number of stations to omit from the solution (.POMs stay the same) |
| east | first omitted station |
| west | second omitted station |
The input and output files used in tdsolve are summarized below:
Input Files:
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tdsolve.inp
mergedb.inp
.POM files
database hd.dat
database or.dat
database dt.dat
Output Files:
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update .POM files
tdsolve.sum
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