MODELING & SIMULATION

The Modeling and Simulation Group at Adaptive Methods is a leader in the research and development of underwater acoustic simulation-based tools for the Navy. Members of the Adaptive Methods ModSim Group are recognized experts in the fields of underwater acoustic modeling, especially modeling for multi-statics. Adaptive Methods is the designer, developer, and integrator of the Active System Performance Estimate Computer Tool (ASPECT), the multi-static sensor mission planning tactical decision aid (TDA) for fleet use for both the Extended Echo Ranging (EER) and the Improved EER (IEER) systems. Adaptive Methods is also integrating advanced Java-based ASPECT mission planning modules into the NITES II OOR architecture for Air ASW mission planning in the Tactical Support Centers.

Adaptive Methods served as the leaders of the software development effort for the Tactical Acoustic Measurement and Decision Aid (TAMDA) system, a next-generation measurement and processing system for rapid at-sea environmental adaptation.

Products:

GAMUT

GAMUT is the Generic Acoustic Modeling Universal Toolkit. Originally conceived and developed at Adaptive Methods, GAMUT is a toolkit of reusable objects that can be easily interconnected to create acoustic modeling and simulation applications. GAMUT components are written in Java.

FORCEnet ASPECT - Active System Performance Estimate Computer Tool

FORCEnet ASPECT is the next-generation mission planning tool developed at Adaptive Methods. It is based on the Active System Performance Estimate Computer Tool (ASPECT), the Multi-Static TDA. FORCEnet ASPECT will be initially developed as a standalone product, with concurrent integration into the Naval Integrated Tactical Environmental Subsystem II Object Oriented Re-design (NITES II OOR) product. FORCEnet ASPECT is being developed to be compatible for interoperation with other FORCEnet-compatible entities.

ASSESS - Active Source / Safe Environment Simulation Software

The objectives of this software tool will be to provide "end users visibility into the environmental impacts and alternate courses of action that would mitigate any proposed action". The development of this tool will require:

Design and development of a comprehensive marine mammal database, to include such information as: location and migration specifications, frequency dependent hearing sensitivity, communication frequencies, and (to assess impact of explosive sources) tissue density measurements;

Use of state-of-the-art, validated acoustic models, environmental databases, and methods for evaluating the potential impact of active sonars and sonobuoys in complex sub-littoral and other coastal environments; and,

Design of well thought out software to allow for: efficient implementation of future Navy systems, minimal effort on the part of the end user, broad-based access from multiple hardware platforms in various locations, and adaptation to similar veins of research.

EMP - Environmental Mission Planner

To support the planning, deployment and operation of environmental sensors, a total system solution is needed for the software to support the sensor. This software must address three important phases of the mission associated with the environmental sensor. First, the software will be used to plan the deployment strategy for the sensors. Next, the software will be used during deployment and operation of the sensors, to receive and process information from the sensors, and to reassess tactical performance and planning based on the information received. Finally, the software will be required to perform post-mission analysis of the data and to provide mechanisms for the data from the sensor to be properly archived for later use and analysis.

ESSS - Environmental Sensor Simulation System

The proposed Environmental Sensor Simulation System (ESSS) will accurately represent the spatial, azimuthal and temporal dependencies that exist in the ocean environment. The bottom sediment, which is so important in shallow water active acoustics, will also be represented. ESSS’s role will be as a dynamic ocean model that other processes will use, such as inversion algorithms and sensor placement computations.

Legacy ASPECT

ASPECT is the Active System Performance Estimate Computer Tool, the Multi-Static TDA (Tactical Decision Aid). It computes estimates of system performance for active underwater acoustic sensors. ASPECT is written primarily in C and interfaces with a number of Navy standard models and databases. ASPECT will eventually be superseded by FORCEnet ASPECT-- an application developed using modules from the Generic Acoustic Modeling Universal Toolkit (GAMUT).