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Bernese GPS Software Version 5.0 - Bernese GNSS Software

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22.8.6 Station Eccentricities<br />

Type: ASCII<br />

Directory: Campaign-specific directory STA.<br />

Extension: ECC<br />

Content: Station eccentricities.<br />

22.8 Station Related Files<br />

Created by: User-defined, assistance using ”Menu>Campaign>Edit station files>Eccentricities”.<br />

Used by: All processing programs.<br />

Example: Figure 22.34 and ${X}/DOC/EXAMPLE.ECC.<br />

With an eccentricity file it is possible to have receivers at eccentric points with a known<br />

position relative to the center station. Introducing the eccentricity elements as given,<br />

only the coordinates of the center station will be estimated in <strong>GPS</strong>EST, CODSPP, and<br />

MAUPRP. In some cases it is easier to estimate the eccentric coordinates (where the <strong>GNSS</strong><br />

receiver/antenna is located) and to handle the eccentricity problem outside of the <strong>Bernese</strong><br />

programs (especially if the eccentric values are not precisely known). In that case no eccentricity<br />

file is needed.<br />

The eccentricity file may also be used to estimate one set of coordinates for two receivers<br />

by introducing the known vector between the two sites into an eccentricity file.<br />

The file contains:<br />

• Eccentric station number. The numbers of centers and eccenters has to be unique for<br />

stations processed simultaneously.<br />

• Eccentric station name.<br />

• Name of center station belonging to the eccentric station.<br />

• Eccentricities (DN, DE, DH) in the local geodetic datum specified in the third line<br />

of the file if you set SYSTEM to “L” (L:LOCAL) or the (DX, DY, DZ) eccentricities in<br />

the geocentric system (G:GEOCENTRIC). The datum must be equal to the datum in<br />

the coordinate file used. The eccentricities are added to the coordinates of the center<br />

station to obtain the eccentric station coordinates.<br />

The end of the list is indicated by a blank line.<br />

Example for an eccentricity file<br />

--------------------------------------------------------------------------------<br />

LOCAL GEODETIC DATUM: IGS00 SYSTEM : L (G: GEOCENTRIC, L: LOCAL)<br />

CENTER --> STATION<br />

NUM STATION NAME CENTER NAME DN (M) DE (M) DH (M)<br />

1 AUCK 50209S001 AUCK 50209M001 -0.0030 -0.0050 1.3490<br />

2 FAIR 40408S001 FAIR 40408M001 0.0070 0.0040 0.5320<br />

Figure 22.34: Station eccentricity (ECC) file.<br />

<strong>Bernese</strong> <strong>GPS</strong> <strong>Software</strong> <strong>Version</strong> <strong>5.0</strong> Page 521

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