Our modular system architectures enable cooperative development of PNT sensor fusion systems with multiple organizations, allowing for lower cost of development and rapid modification of deployed systems. By standardizing the sensor interface, sensor fusion interface, and application programming interface (API) of the sensor fusion software itself, sensors and algorithms developed by different vendors can be rapidly integrated into a single system. 

We have extensive experience in developing testbed platforms which allow for the maturation and validation of science and technology (S&T) concepts, with a focus on enabling rapid experimentation, tradespace analysis, and transitioning theoretical solutions into working prototypes at a high technology readiness level (TRL). Our testbeds are designed to prove out anything from pure software solutions to working hardware prototypes, with a particular focus on PNT systems with novel sensor suites.

Our team understands that in order to ensure the resilience of a PNT solution it is often necessary to incorporate complementary PNT approaches into systems that utilize standard GPS/inertial navigation system (INS) solutions. We have extensive experience in a wide variety of approaches including vision navigation, magnetic field navigation, navigation using signals of opportunity, baronav, terrain aided navigation, and between-aircraft relative navigation.

Robust and resilient precision time is increasingly important for both Department of Defense (DoD) and civil infrastructure. IS4S has developed a precision timing architecture called software defined timing which enables fusion of multiple clocks and time sources, as well as advanced integrity algorithms that are not possible with a classic GPS-disciplined oscillator system. This is an open architecture approach with swappable and customizable components.

We are leading the development of mission-critical software that is designed to meet airworthiness requirements for operational systems. Using open systems approaches such as pntOS and ASPN, this software is designed to be adaptive to changing requirements and threats. This is achieved by breaking down the problem into isolated components that can be inserted or swapped out to effect changes with minimal impact on the rest of the software.