March 29, 2023

1024 beams vs 1024 soundings, are they the same?

Knowledge & Training

The difference lies in the data collection method: interpolated vs independent

Three years ago, R2Sonic was the first MBES manufacturer to launch the “then new” technical mode Ultra High Density (UHD) which consists in collecting 1024 independent soundings, an improvement from the traditional 256 soundings. This 400% increase in number of independent soundings provides greater horizontal resolution and definition of the area surveyed.

We purposely did not increase the number of beams, and instead focused on soundings.  Given that the swath sector is the same, augmenting the number of beams implies adding data points that are calculated as the average of areas of the seabed that have already been accounted by the traditional 256 beams.

The Ultra High Density (UHD) mode, on the other hand, consists in a non-traditional sounding method that is independent from the number of beams, and therefore that does not rely on interpolated data.  As a result, soundings obtained with UHD provide greater detail than classic bottom detect.

The graph below highlights that datapoints collected with a classic bottom detect method fails to capture the details that UHD collects.  The resulting image of the seafloor obtained with interpolated data will look smoother because key features are lost in the calculated average of the footprint.  UHD provides more granularity and accurate representation of the bottom.

coverage   surroundings   uhd   

March 29, 2023

MBES can’t be IHO compliant and here is why

MBES and the IHO SP44 Standards for Hydrographic Surveys The International Hydrographic Organisation, based in Monaco, published the 5th edition of Special Publication No 44 Standards for Hydrographic Surveys in February 2008.  SP44 sets forth the minimum standards for survey accuracy. By 2008, multibeam echosounders had been well established as standard equipment for hydrographic…

coverage   iho   Survey   


October 30, 2023

University of Malta Survey Project

We are delighted to participate in this project supported by the Maltese National Space Fund and the European Space Agency, to survey the coastline of the Maltese Island to test the viability of a workflow for obtaining a new bathymetric layer from satellite derived information.


March 19, 2023

MultiSpectral versus Multifrequency Backscatter: A Generational Advancement

Multibeam Backscatter is a tool used in seafloor characterization, and R2Sonic‘s recent MultiSpectral Backscatter advancement dramatically improves this process.  MultiSpectral Backscatter comprises two or more frequencies collected in one-pass using an advanced sonar capable of multifrequency transmissions, either interleaved or simultaneous. MultiSpectral Backscatter should not be confused with MultiFrequency Backscatter Older sonars can collect Multifrequency Backscatter…

Installation   Survey