Townsend, Middlesex County, Massachusetts, United States road map, satellite view, street view, terrain map, photos... Townsend, MA is situated at 42.67Â° North latitude, 71.71Â° West longitude and 91 meters elevation above the sea level.
Time of Flight. The simplest way to think about âtime of flightâ laser scanning is to look approach it as nothing more than a laser range finder. I think we all understand how a laser range finder works. It basically measures a distance by shooting a laser beam out to an object and measuring how long it takes that laser beam to bounce back.
In this shot, down-scanning sonar has revealed massive schools of herring. Scanning sonar works differently in two key ways. The primary difference is that the transducer broadcasts a very narrow beam, both straight down and side-to-side, instead of the traditional cone shape.This means the display is receiving a nearly two-dimensional signal, allowing for a much more detailed display image.n this shot, down-scanning sonar has revealed massive schools of herring. Scanning sonar works differently in two key ways. The primary difference is that the transducer broadcasts a very narrow beam, both straight down and side-to-side, instead of the traditional cone shape.