IS4S is a recognized leader in assured PNT. Our solutions are built on modular frameworks that incorporate various navigation modes to provide high-availability, high-integrity PNT throughout multiple domains, including ground, air, and space.

We incorporate a layered defense against interference to protect the PNT solution through anti-jam processing, signal processing, encryption, and integrity monitoring. Our support of new PNT initiatives is driving waveform design and development to demonstrate accurate, available, next-generation PNT. 

Our team uses software-defined platforms to create custom, configurable, and adaptable capabilities. We develop software-defined global navigation satellite system (GNSS) receivers to explore new receiver architectures, integrate aiding sensor measurements deep within the receiver, and emulate other receivers. Likewise, our software-defined digital antenna electronics (SD-DAE) evaluate anti-jam and electronic support techniques. We employ software-defined transmitters to shape the electromagnetic spectrum and demonstrate new PNT waveforms. Using our expertise in software-defined systems and embedded prototyping, we can quickly shape solutions to meet mission needs. 

We specialize in embedded system development to implement emerging solutions within legacy and modernized processors. Our embedded subject matter experts focus on efficient, high-speed code and firmware development along with embedded system management.  

Whether the host platform is a Unix system, field-programmable gate array (FPGA), bare metal processor, or running a real-time operating system (RTOS), our engineers maximize capability while minimizing processor and memory utilization.   

Our team uses tactical networks to integrate systems and enable new capabilities. We regularly select, configure, and deploy tactical networks across test ranges to connect command and control (C2) systems with multi-domain assets.

Our custom protocols efficiently and robustly transport data over disadvantaged networks and inform communication standards. We implement tactical waveforms within emerging, software-defined systems to increase communication range and enable extended C2. 

We develop innovative solutions across all three electromagnetic warfare (EW) pillars—support, protect, and attack—from science & technology (S&T) concepts to transitioned capabilities. Our systems can sense and control the electromagnetic spectrum (EMS), particularly around the PNT bands, using adaptable software-defined solutions. Our understanding of the EW domain drives creative electromagnetic protection mechanisms implemented within custom solutions or wrapped around existing components. Our solutions enable EW and PNT situational awareness (SA) and situational understanding (SU) within mission planning and command systems. 

We create modeling & simulation (M&S) environments across a variety of applications to enhance development, testing, and demonstration of solutions. Whether for radio frequency (RF), fires, or ground vehicles, we construct first principles models and work with validated simulation frameworks. We extensively use hardware- and software-in-the-loop (HWIL/SWIL) simulation across our efforts and within our continuous integration pipelines. We validate our M&S tools by comparing against live data collected within our anechoic chambers or at test ranges. 

We have a deep understanding of the present-day threat to GPS and GNSS, from simple privacy devices used by truckers up to sophisticated electronic warfare attacks employed by state actors. Our team develops software and hardware solutions that integrate with a wide range of critical infrastructure and tactical platforms to detect, characterize, and protect against GNSS threats. Our modular, open architecture solutions scale effortlessly to support a wide range of integration depths and performance requirements. 

IS4S enables collaboration and coordination among emerging technical solutions by integrating or enhancing command and control (C2). We prototype next generation C2 capabilities that better inform operators and client systems while reducing cognitive load. Our integration efforts to connect C2 with a broader system of systems help identify and define integration pathways to build more informative common operating pictures (COPs) or serve information to client systems.