Originally Posted by Mr Optimistic
Forgive the noob question on sonar, but is the image produced on a single pass, eg from the rov above the eastern edge of the lane, or is it the addition of two half pictures, one from the east and one from the western pass ? Also what would the effective lateral beam width be, ie the length of image producted by a point object (are the N/S 'smearings' a reflection of pulse width and not debris dimension ?). Noting its a jpeg, any need to be careful about compression artefacts ?
See post 3169
http://www.pprune.org/6357167-post3169.html for most of this info. The published image appears to be mosaic of two images, one looking east (from the west side of image) and one looking west. The AUV travelled in the center of the dark bands (one to the west and one to the east). I do not expect that image compression has affected the image significantly. The north/south smearing is a function of beam width and vehicle motion.