Not Available The military and Navy have found modeling and simulation cost effective for training, design, testing, development, and mission rehearsal as operational equipment has become more complex and costly to operate. Distributed simulations are being fielded to allow a wide range of… More

For acoustic sensors to have sufficient detection ranges on future combat systems, a platform noise reduction system that achieves near ambient noise levels is needed. The overall objective of this project is to demonstrate the feasibility of platformnoise reduction using noise cancellation sensors… More

Signal Systems Corporation will develop, test and deliver three acoustic surveillance and warning systems for HMMWV, M113, LAV and unmanned land vehicles. SSC will demonstrate functional compatibility with different Future Combat System (FCS)concepts,fielding a common acoustic system on four land… More

Environmental information is critical to successful littoral Air ASW multistatic search operations. Environmental information is used to optimize buoy field spacing, frequency band selection, and classifier parameters in systems such as Improved ExtendedEcho Ranging (IEER) and Distant Thunder. In… More

The US Navy uses multistatic acoustic sensor systems with Air Anti-Submarine Warfare (ASW) aircraft, supporting acoustic sources and receivers in a coordinated ASW search and surveillance mission against conventionally powered submarines operating inshallow water as well as all submarines operating… More

The US Navy uses multistatic acoustic sensor systems with Air ASW aircraft, supporting acoustic sources and receivers in a coordinated ASW search and surveillance mission against submarines. Current systems suffer from high false alarm rates when operating in shallow water. The operator is the… More

Environmental information is critical to successful Air ASW multistatic search operations to optimize buoy field spacing, frequency band selection, and classifier parameters in systems such as ALFS, EER and IEER. Tactically important environmental parameters are local and time-varying for shallow… More

Multistatic sonar technologies are emerging as an important strategy for addressing passive ASW sonar-performance shortfalls. Multistatic operations can potentially improve ASW effectiveness in challenging shallow-water environments while allowing critical assets to remain acoustically covert or at… More

Current acoustic localization systems utilize a traditional pulse type sonar approach. A low power alternative, which would be more environmentally friendly toward marine mammals while maintaining required performance, is desired. Continuous wave systems that operate at lower average power could… More

Noise levels in crew compartments below the flight decks on Navy ships during flight operations have traditionally been extremely noisy due to jet engine noise as well as launch machinery transients. Levels exceed Navy desired levels by over 10 dB. Current state of the art materials do not work… More

Multistatic sonar technologies are emerging as an important strategy for ASW. Multistatic operations can potentially improve ASW effectiveness in challenging shallow-water environments while allowing critical assets to remain acoustically covert or at a safe standoff distance. The Navy uses… More

The Continuous Active Sonar (CAS) program is a NAVAIR project to demonstrate the feasibility of CAS operation for Anti-Submarine Warfare (ASW). The project is focused on multistatic distributed ASW sonar, supporting the localization-to-attack and maritime shield missions of ASW. In Phase I of this… More

SSC will develop methods to automatically fuse high clutter rate active and passive sonar contact information with improved data registration. Using its active sonar system performance model it will augment its active/passive fusion models and conduct system studies to determine operational… More

Signal Systems Corporation and team member, Scripps Oceanographic Institution, will investigate the feasibility of using time reversal acoustics in a sonobuoy-based forward scatter barrier and monostatic/bistatic active ASW system with reverberation nulling.

Signal Systems Corporation (SSC), with teammate Johns Hopkins University/Applied Physics Laboratory (JHU/APL), will develop an energy efficient broadband Doppler-sensitive waveform processing technique that has good detection and clutter rejection performance for all Doppler conditions that are… More

The overall objective of this project is to develop an affordable, militarily useful and mature multi-sensor ASW fusion technology. The software will be demonstrated in a relevant environment to be at Technology Readiness Level (TRL) 6 for incorporation into the Multi-Mission Aircraft/P-8A. At a… More

An optimized Iridium satellite link configuration enhances the data flow and buoy power consumption.

SSC will use a novel rafting concept that reduces the area authority fo the Active Noise Cancellation solution. This approach is patented and demonstrated in the Smart Skins Demonstration (S2D) program. Mature algorithms provide a low risk path to a Phase I demonstration and a Phase II insertion… More

A new broadband Doppler-sensitive waveform and processing technique for improved multistatic field performance will be validated using real world data from U.S. Navy sea test exercises. The new strategy realizes improved performance for equivalent transmitted acoustic energy by exploiting both low… More

Existing Air ASW multistatic sonar search systems do not fully exploit all of the scattering information available in the acoustic field. This project seeks to further demonstrate that multistatic target echoes affect the acoustic field in a manner that allows one to differentiate target from… More

The RAP/VLA and other emerging sonobuoy based sensing systems require a robust over-the-horizon (OTH) communications mechanism that offers low probability of detection (LPD) and low probability of intercept (LPI) as well as secure transmission. Signal Systems Corporation (SSC) will demonstrate a… More

Signal Systems Corporation (SSC) proposes to develop a Spread Spectrum Multistatic Active Covert (SSMAC) sonar system. The proposed research will benefit existing sonar systems and also yield revolutionary system concepts. During Phase I, we will develop algorithms necessary for mitigating… More

Signal Systems Corporation, with its partners USSI and Marine Acoustics Inc, will show, using a simulation based design approach, that it is feasible to develop a highly automated Marine Mammal Mitigation Sonar (M3S), embedded in an AN/SSQ-125 source sonobuoy, which is effective in reducing operator… More

Future Air ASW will be conducted at higher altitudes, making visual, Mark-On-Top and RF techniques less accurate for receiver localization. What is needed are techniques that can provide buoy and target localization using just acoustic information. Alternatives such as installing GPS receivers in… More

Coherent distributed active sonar systems are of great importance for the prosecution of modern day underwater threats. Existing systems typically employ sensor management strategies that underutilize the full capabilities of the multistatic sensor field. If the distributed multistatic field could… More

SSC proposes a low power tri-axial acoustic sensor that leverages our existing acoustic chambered design to provide a directional sensor that has high sensitivity, rugged construction with low power consumption. Our approach extends prototypes developed under DoD sponsorship, including… More