Sonardyne data formats
ADCP Origin 600 and Origin 65 *.bgram data file format
Echoview reads echosounder mode data recorded in *.bgram files by Origin 600 and Origin 65 ADCP systems. The raw variables derived from *.bgram files may include variables for unspecified dB, heading, pitch, and roll data. The Origin 600 system has four outer beams inclined at 25 degrees to the vertical, and a fifth vertical beam. The Origin 65 system has four beams inclined at 20 degrees to the vertical. Unspecified dB acoustic ping data is proportional to the received signal on the beam axis. A default sound speed of 1500 m/s is used to calculate sample range. Frequency (kHz), PulseDuration (ms) and Temperature (°C) are read from the data file. Refer to Sonardyne equations for more information.
Note that Sonardyne *.bgram echosounder ranges are for transducers mounted at an angle to the vertical axis. Echoview's default Transducer Geometry - Orientation settings assume that sample range is equal to sample depth (the case of a downward pointing transducer, with transducer elevation, heave, and draft equal to zero). When real world positioned data is important to your analysis, configure platform settings and individual transducer orientation and location settings. For further information refer to About transducer geometry, About depth and range, Transducer Properties and Platform Properties. Or contact support@echoview.com.
Figure 1. Sonardyne Origin 600 ADCP. The pink line is the vertical beam axis for Beam 5. The grey line is the beam axis for Beam 2, where transducer 2 is mounted at 25 degrees inclined to the vertical axis.
For further information about the Origin 600 and Origin 65 ADCP systems contact Sonardyne.
Fileset note
The Origin 600 and Origin 65 systems differ in frequency, differ by the number of beams, and differ in beam configuration. It is advised that *.bgram files recorded by each instrument system be added to separate filesets in order to avoid deriving a mix of data from different systems into the same variable.
See also
Raw variables derived from Sonardyne data files
Calibration settings for Sonardyne data
Sonardyne equations