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Part 5 - OUTPUT FILES
Output files are created each time communication is received from a tag and contain the received
data. These files are stored in the assigned data directory. Because there are many types of tags and
types of communication, there are a number of different types of output files. The principle division
in the file types occurs based on the type of tag, either a transmitter or a transponder (CHAT tag).
TRANSMITTER DATA FILES
Data files are created when the VR28 receiver is in transmitter mode (i.e. tracking a transmitter).
The data received from the transmitter is automatically stored to a data file for later viewing and/or
editing. This data file is located in the data directory assigned in the File menu.
Data files from continuous transmitters are setup slightly differently than data files from coded
transmitters. The different data files all have their naming convention method in common. They
also have two types of lines in the file: comment lines, and data lines.
Comment lines: increase the readability of the file and begin with an asterisk (*). The comment
lines are found in the file header and include information such as the data file name, the serial
number, operating frequency, data type of the transmitter, slope and intercept (if applicable), and
sensor type (if applicable), etc. Comment lines are only found in the header of the file, before the
line *100,EOH (for End of Header).
Data lines: contain the data related to the preceding comment line and begin with the "greater
than" symbol (>). If more than one piece of data is given in a data line, the individual data fields are
separated by commas. Data files found after the header may contain positioning information, if
either the GPS or gyro compass is enabled.
Continuous transmitter data files
A data file for a continuous transmitter will contain data pertaining to one and only one continuous
transmitter. This is the transmitter selected from the Select continuous transmitter to track window.
There are three types of continuous transmitter data files, each one with a slightly different format to
accommodate the types of data received: Pinger, One Channel Telemetry, Two Channel Telemetry.
These file types are described below with examples.
Transmitter output data files are named using the convention Vyymmdd.zzz, where:
yymmdd = date transmitter signal was first received (year, month, day), and
zzz = number of real time data files created on that day (beginning with 000).
VEMCO - VR28 SYSTEM MANUAL - PAGE 62