Multibeam echosounder (MBES) for mapping subaqueous topography in rivers, lakes and seas

我们要求资金用于多波束回声测深仪（MBES）。该仪器测量河流、湖泊或沿海几米到几米宽（取决于水深）的相对深度。将相邻的轨迹结合起来，就可以绘制出精确度为厘米的河床、湖底或海底地形图。 信号同时从一个探测头发送和接收，该探测头在140度的范围内产生512个独特的探测信号。 原则上，它结合了许多传统的回声测深仪，但信号允许制作水下表面的完整地图-单波束测深仪实际上不可能做到这一点。 这些探测结果经过温度、压力、声速变化和船只运动的校正。 处理软件可根据当地大地测量基准校正相对深度。

We request funds for a multibeam echosounder (MBES). The instrument measures relative depth in rivers, lakes or coastal seas in 'swaths' several to many meters wide (depending on water depth). Combining adjacent tracks enables one to make a map of the topography of a channel bed, lake bottom or sea floor with centimeter precision. Signals are simultaneously sent and received from a sounding head that produces 512 unique soundings across a 140 degree swath. In principle, it combines many conventional echo-sounders, but the signals permit a complete map of the subaqueous surface to be made - something not practically possible with a single-beam sounder. The soundings are corrected for temperature, pressure, sound velocity changes and boat motion. Processing software allows relative depths to be corrected to local geodetic datums.