Ashtech B-File

The following describes the options available for this converter:

Ashtech Receiver Type

Selects the receiver used to collect the data. If auto-detect is unsuccessful, then select the receiver manually.

General Options

Perform pre-processing checks

If enabled, data is scanned after conversion to correct potential issues. See Pre-processing Checks for more information.

Detect static/kinematic from site name

Looks in B-file for data tagged as static or kinematic, using ???? site ID.

Verbose messaging mode

Displays additional warning messages.

Extract stations information from Ashtech 'D-File'

Various Thales hand-held controllers output a D-file containing features and antenna height information. Enable this checkbox to utilize this information.

Ignore SBAS Satellites

Newer versions of Ashtech firmware have resulted in the logging of raw data from SBAS satellites, which are not supported by the software. As such, this option should be left enabled to ensure the data is not written to the GPB file.

Static/Kinematic Mode

This option controls how the static/kinematic flags are set in the final GPB file. Auto will set the entire file static or kinematic according to the detected processing environment.

UTC Options

Use the following UTC time

Changes the GPS to UTC time offset from the current nominal value to a user-defined value. Normally used for GLONASS processing if no UTC is contained in the data.

Correct GPS time in D-FILE for UTC offset

D-files can have GPS or UTC time. This option changes time from UTC to GPS.

Dfile Options

Chain Repeated Station Marks into 1 Static Session

Combines sessions that are repeated in the Seismark software into one session.

Do NOT Chain Marks that are more than n seconds apart

This value controls the time tolerance used in the previous setting. If two static periods are marked less than the amount apart, they will be combined.

Files Supported for Ashtech B-File











Static Station Information

Written to STA file.


Kinematic Station Information

Written to STA file.


Event Mark

Read in directly by software.

Thales files follow a strict naming convention. In the table above, ssss is the site name, yy is the last two digits of the year, and jjj is the day of the year.

Antenna heights may need to be edited within the feature editor if not kept constant, as the Thales format only allows for one value.

You might need to select the receiver type manually.