<title>Airborne laser depth sounding: system aspects and performance</title>

Abstract

In Sweden work on airborne depth sounding lidar has taken place for more than ten years. Activities include the development of a helicopter borne lidar called FLASH as well as instrumentation (HOSS) for in situ measurement of the optical water parameters. These instruments have been used in rather extensive field trials some of which are discussed in more detail. Recently we have been engaged in analysis of lidar data to determine system performance and possible ways to optimize that relation to lidar parameters and anticipated bottom depth and topography. Examples from that analysis are presented. Comparisons between laser and acoustic soundings are presented. The FLASH system has been further developed into two operational systems called Hawk Eye with Saab Instruments as the main contractor and Optech Inc. as the main subcontractor. The first of these two systems has now been delivered for helicopter installation and acceptance flights. Data from Hawk Eye is discussed.