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Bernese GPS Software Version 5.0 - Bernese GNSS Software

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22.9 Atmosphere Related Files<br />

D: L1, DAY ALL, STA.SPE. 24/DAY ., ELE. 20 29-DEC-94 16:36<br />

STATION : AGAR <strong>GPS</strong> UTC-LOCAL TIME(HOURS) = 0 TYP= 3 #VALUES= 1 MOD= 1<br />

JJJJ MM DD HH MM SS CCCC.CCCC<br />

1994 9 6 10 0 0 1.9412<br />

1994 9 6 11 0 0 1.9412<br />

.... . . . . . ...<br />

22.9.4 Ionosphere Models<br />

Figure 22.49: Meteo (MET) file of type 3.<br />

Type: ASCII<br />

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

Extension: ION<br />

Content: Ionosphere models (represented by sets of total electron content (TEC) parameters).<br />

Created by: IONEST (”Menu>Service>Ionosphere tools>Local ionosphere model estimation”, model type 1<br />

only), <strong>GPS</strong>EST (”Menu>Processing>Parameter estimation”, model type 1 not supported<br />

by the menu system), ADDNEQ2 (”Menu>Processing>Normal equation stacking”, model<br />

type 1 not supported).<br />

Used by: MAUPRP (”Menu>Processing>Phase preprocessing”), <strong>GPS</strong>EST, ADDNEQ2, <strong>GPS</strong>SIM<br />

(”Menu>Service>Generate simulated observation data”).<br />

Example: Figure 22.50 (model type 1), Figure 22.51 (model type 2), and Figure 22.52<br />

(model type 3). Example files also available in ${X}/DOC.<br />

We support three types of ionosphere models:<br />

Type 1 Local ionosphere models (see Section 12.3.1.2) may be generated and used in the<br />

following way: estimated by program IONEST (processing zero-difference L4 observations)<br />

and introduced into programs MAUPRP and <strong>GPS</strong>EST. We do not recommend<br />

to estimate ionosphere models of type 1 using <strong>GPS</strong>EST, because this feature<br />

is not supported by the menu system.<br />

Type 2 Global/regional ionosphere models (see Section 12.3.1.3) may be created much easier<br />

using <strong>GPS</strong>EST.<br />

Type 3 Station-specific ionosphere models (see Section 12.3.1.4) are treated exactly in the<br />

same way as global/regional models. One full set of ionosphere parameters is set<br />

up with respect to each station involved, however.<br />

More information concerning ionosphere models is given in Chapter 12.<br />

<strong>Bernese</strong> <strong>GPS</strong> <strong>Software</strong> <strong>Version</strong> <strong>5.0</strong> Page 537

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