Calibration methods for two scientific multibeam systems
Calibration methods for two scientific multibeam systems
复制标题
两种科学多波束系统的标定方法
DOI：
10.1093/icesjms/fsp125
复制
发表时间：
2009
影响因子：
3.3
通讯作者：
L. N. Andersen
中科院分区：
文献类型：
--
作者：
E. Ona;V. Mazauric;L. N. Andersen
Ona, E.、Mazauric, V. 和 Andersen, L. N. 2009。两种科学多光束系统的校准方法。 - ICES 海洋科学杂志，66：1326-1334。新型 Simrad 科学多波束系统、MS70 声纳和 ME70 回声测深仪均通过许多电子形成的波束进行传输，中心频率范围为 70 至 120 kHz。因此，这些系统的校准比传统的分束回声测深系统更加复杂。设计和制造了两个大型碳化钨球（直径 75 毫米和 84 毫米），以便于在整个操作带宽上进行精确的现场校准。它们很重，因此当悬挂在船下时很稳定，并且目标强度比测量体积内潜在的生物目标大得多。本文介绍了现场校准每个系统的程序以及两个此类实验的结果。对各个光束结果的详细检查表明，所描述的程序中的微小调整可能会进一步提高报告的校准精度。
Ona, E., Mazauric, V., and Andersen, L. N. 2009. Calibration methods for two scientific multibeam systems. - ICES Journal of Marine Science, 66: 1326-1334.The new Simrad scientific multibeam systems, the MS70 sonar and the ME70 echosounder, each transmit over many electronically formed beams with centre frequencies spanning from 70 to 120 kHz. Calibrations of these systems are therefore more complex than for conventional split-beam echosounder systems. Two large tungsten-carbide spheres (75 and 84 mm diameter) were designed and manufactured to facilitate accurate field calibrations over the entire operational bandwidth. These are heavy and therefore stable when suspended beneath a ship, and have target strengths much larger than those of biological targets potentially within the measurement volume. This paper presents procedures for calibrating each system in the field and the results from two such experiments. Detailed inspections of the results for individual beams indicate that minor adjustments in the described procedures might further improve the reported calibration accuracy.