摘要
传统的水下地形测量模式定型于利用GPS测定水底点的平面位置,利用测深仪测定水底点的深度,附之以瞬时潮位资料,获得点位的高程。这种模式在上述条件具备的情况下,可取得完满的结果。但当验潮条件不具备时,该模式将不能获得测点的高程。为了弥补这一缺陷,简化工作流程,提高水下地形测量的精度,本文提出了一种无验潮模式下的水下地形测量思想,该思想不用专门测定潮位,而直接利用GPS的RTK测量技术,辅之以姿态测量和补偿,从而获得高精度的水底点高程。该方法被验证是正确的,希望进一步的推广应用。
Conventional underwater topography survey model is based on applying GPS to measure the plen position of points at river bottom,utilizing a sounder to determine its water depth,supplemented by instantaneous tidal levei data,so as to obtain the elevation values of these points.On occasions that the above conditions are met,this model can acquire a satisfactory result.But when a tidal observation condition is not satisfied,this model won't obtain the elevation of points.In order to overcome this defect,simplify working procedure and improve the accuracy of underwater topographical survey,the author of this paper presents a underwater topographical survey concept without tidal observation model.Using this concept,the tidal level needs not to be measured speclifically,and the RTK measurement technology GPS can be directly utilized,supplemented by attitude measurement and compensation,thus obtaining a high-accuracy elevation of points at river bottom,This method is verified to be correct,and is wished to be further developed.
出处
《现代测绘》
2012年第2期36-38,共3页
Modern Surveying and Mapping
关键词
无验潮模式
船体姿态
RTK
model without tidal observation
ship attitude
RTK
