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1.          Brief Description

ASORPS (Advanced Sonar Range Prediction System) was developed by Professor Chen, Chi-Fang and her team.

ASORPS v3.0 can predict the sonar detected performance by combining with ocean models, high-performance acoustic calculation models and ocean environment databases. The prediction can be shown on the Operating System Interface of GIS, Geographic Information System in order to let the result visualized. Scientific visualization not only increases the understanding of battlefield situation, but also can lower the training costs of staffs.

ASORPS v3.0 is a useful system for ROC Navy to estimate the anti-submarine forces. Through predicting the sonar detected performance, one can accomplish “real-time” tactical deduction in different hydrology environments.

The latest version, ASORPS 3.0 Office Version, is now available.

2.          Introduction of ASORPS V3.0

ASOPRS V3.0 is structured by a modularization model, and is calculated by numerical simulations. The calculated results can provide tactical needs for analysis and application on antisubmarine operations.

The acoustics calculation model divides the high and low frequency, and increases the calculated speed. In addition, ASOPRS v3.0 can calculate the multi-azimuth and multiple operation questions.

The display module can mark the shadow zone and the convergence zone, display the different azimuth figures, which include the transmission loss, detection probability, and the ray trace. The result will be exported to GIS. On the GIS’s interface, one can overlap different layers, to provide tactical needs about anti-submarine and multi-fleet.

Figure 1. ASORPS combined with the Operating System Interface of GIS

3.          Advantages

I.        The preliminary assessment of U.S Navy said that ASORPS v3.0 is very close to the U.S system, IMAT (Interactive Multi-sensor Analysis Training).

II.     ASORPS v3.0 can combine other marine environmental database. Because it uses delicate grids, the prediction for Taiwan’s peripheral environment is more accurate than foreign systems.

III.   The calculated results of ASOPRS v3.0 can provide tactical needs for analysis and application on antisubmarine operations.

IV.  ASORPS v3.0 can enhance the detection capability with the Taiwan peripheral environmental databasesespecially at the west-south and east-north areas, which included noise , reverberation, and substratum.

V.     ASORPS v3.0 provides visualization of result, which can simulate maneuvers of multi-fleet combining the environment. This function can decrease the training costs of staffs.

Figure sources : Assessment reports from the Navy


4.          Fields of Application

ASORPS for ROC Navy has two main applications: real-time prediction on the sea, and forecasting on the land.

1.   Real-time prediction on the sea

I.        Combining with the environmental information of the local marine area. (The environmental information include the local hydrology, geography and substratum.)

II.     Calculating high-performance acoustic model immediately.

III.   Providing the sonar detected performance of different sonar systems on fleets.

IV.  Providing the tactical forecast instantly.

2.          Forecast on the land

I.        Forecasting sonar detected performance of different sonar systems.

II.     Displaying the tactical distribution of the sonar detected performance on multi-platform.

III.   The forecast information can be use on other systems.

The optimized value from ASOPRS can provide to the decision-maker for tactical planning.






Copyright @ Underwater Acoustic Laboratory Department of Engineering Science and Ocean Engineering ,National Taiwan University