Open nilsolav opened 3 years ago
All the equations for converting beam coordinates to geographical coordinates are detailed in chapter 5 of the convention using parameters given in BeamGroup and every sample echo from BeamGroup can be located at a given depth. For GridGroup in step 3 the same equations will be used for calculating depth vector of the gridded data. For GridGroup in step 4 and 5 we do actually the way around we define a fix grid in depth referenced to the surface and we integrate all samples for each channel in each depth cells of the specified grid. The Depth vector is then fixed.
What would be the preferred way of coding range and/or depth in gridded data? I assume a range or deoth vector associated to the grid, but there are a few things to consider:
-For the first steps, keep the data as raw as possible, i.e. no regridding (which I think is needed when adjusting for heave?) -Support both range and depth for all steps, or tie the range and depth to a specific processing step? -How to store/use heave, transducer depth, range at first sample, sample interval? -Perhaps let the depth variable be adjusted to the actual depth (i.e. adjusting for heave, transducer depth, and range to first sample? -Let the range only be adjusted for range to first sample?
And probably several other things that I have not thought of.
Nils Olav