Investigation of a Sound Speed Profilograph Characteristics and Correction of Measurement Results

Abstract

В статье рассмотрены метрологические и пространственно-временные характеристики профилографа скорости звука. Подробно рассмотрен датчик скорости звука, исследован его водообмен в измерительной базе при зондировании с различными скоростями. Разработана динамическая коррекция вертикальных профилей, связанная с движением прибора. Приведены профили скорости звука, в которых прослеживается их слоистость с вертикальными масштабами в несколько сантиметров. Даны рекомендации по использованию прибора в натурных условиях с борта судна. Ключевые слова: температура, скорость звука, метод, соленость, погрешность, моделирование, динамические характеристики, градиент.

Measuring Salinity and Density of Seawater Samples with Different Salt Compositions and Suspended Materials

“…To do this, we complemented a standard SBE911 oceanological probing CTD unit [12] with an ISZ-1, which is an SVP probe developed at the Institute of Natural and Technical Systems (INTS) [13] (Figure 1). The ISZ-1 probe also featured an ultrasonic attenuation measuring channel.…”

Metrological support of acoustic measuring devices in the medium frequency range

“…The calibration of AES-1 was carried out in thermostat with normal deaerated, distilled water, where the device was completely immersed. Day off The N code of the device was recorded at various temperature levels within from 4 to 28°C [16]. Then using the output value code N for the corresponding values temperatures, according to experimental tabular data on the dependence of the speed of sound on temperature were determined, using the least squares method, the coefficients of the regression curve, the graph of which is presented in rice.…”

Development of in Situ Acoustic Instruments for the Aquatic Environment Study

“…The Institute of Natural and Technical Systems (IPTS) has developed its own SVP ISZ-1 [16]. Its technical characteristics are presented in Table 2.…”