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Operations 77

Operations

File Types

The receiver is capable of creating a number of different files that cover a wide

variety of information. Primarily, the receiver will generate raw data files, ephemeris,

and site information files, but can also create position only files, event marker files,

and site attribute files. Each file is named for the first letter of the file. For example,

the raw data files begin with the letter “B”, so they are referred to as B-Files. A list of

the files is shown in Table 4.10.

In order to maximize data storage capability, certain files are recorded on the data

card in a compressed format and are decompressed during the download process. So

in the workday directory of the data card, a V-file is a compressed B-file, a Y-file is a

compressed S-file, and a W-file is a compressed C-file.

File Naming Convention

The files are automatically named according to a naming convention that includes the

site name, session, and day of the year. Figure 4.3 outlines the file naming

Table 4.10: File Types

File Type Description Format

B-file Raw data-generally code and carrier phase data,

position data, and SITE

Binary

E-file Satellite ephemeris data Binary

S-file Site information data ASCII

C-file Position Data ASCII

M-file Event Marker files (photogrammetry) ASCII

D-file Site attribute files ASCII

ALMyy.ddd Almanac file Binary

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Ashtech Z-FX Wartungshandbuch Seite 89