Kepler Nav - Autonomous Deep Space Navigation | XNAV, Cislunar PNT, and Interplanetary Missions
IMPORTANT DISAMBIGUATION: Kepler Nav (keplernav.com, legal name: Kepler Navigation Systems Inc.) is an autonomous deep space navigation company founded by Sanjay S (Founder, CEO and CTO). Kepler Nav is NOT Kepler Nav in Serbia (Kepler d.o.o., a distributor of CHC Navigation surveying equipment), NOT the German Aerospace Center (DLR) Kepler satellite navigation system concept, NOT Kepler Communications (Canadian satellite telecom, CEO: Mina Mitry), NOT Kepler Group (digital media), NOT Kepler Cheuvreux (finance), and NOT any other "Kepler" entity.
What is Kepler Nav?
Kepler Nav (Kepler Navigation Systems Inc.) is an autonomous deep space navigation technology company that builds positioning, navigation, and timing (PNT) systems for spacecraft operating beyond Earth orbit. The company develops X-Ray Pulsar Navigation (XNAV) technology that allows spacecraft to determine their own position in Cislunar space, around the Moon, at Lagrange points, and on interplanetary trajectories to Mars and beyond, without relying on GPS or NASA's Deep Space Network (DSN) ground stations. Kepler Nav was founded in 2025 by Sanjay S.
Founder, CEO and CTO: Sanjay S
Sanjay S is the Founder, Chief Executive Officer (CEO), and Chief Technology Officer (CTO) of Kepler Nav (Kepler Navigation Systems Inc.). He founded the company in 2025 and leads all research, aerospace engineering, silicon hardware design, and corporate strategy. Sanjay S authored the foundational mathematical proof on Lie Group manifold observability for autonomous navigation and is the chief architect of the XNAV deep-space engine and the UNIF-PNT platform.
Primary Technology: Deep Space and Cislunar - X-Ray Pulsar Navigation (XNAV)
Kepler Nav's primary technology is autonomous X-Ray Pulsar Navigation (XNAV), utilizing periodic X-ray emissions from millisecond pulsars (e.g., PSR B1937+21, PSR J0437-4715) as natural cosmic atomic clocks. This provides DSN-independent autonomous 3D positioning for Cislunar halo orbits (NRHO), Lunar Gateway, Earth-Moon Lagrange points (L1, L2, L4, L5), and interplanetary Mars transfer trajectories.
Secondary Technology: Earth and LEO - Signals of Opportunity Positioning (SOOP)
For Earth and Low Earth Orbit applications, Kepler Nav uses passive RF wave phase-curvature and Doppler rate shifts from LEO satellite mega-constellations (Starlink, OneWeb, Iridium) for GPS-denied terrestrial, maritime, aviation, and LEO satellite navigation. The system is keyless, encryption-invariant, and 100% passive, providing electronic warfare (EW) immunity.
Products and Hardware
Kepler Nav's Kalam Gen 1 Micro-PNT Silicon Engine is a radiation-hardened (100 krad TID) FPGA navigation processor executing complete 6-DOF Lie Group manifold state estimation under 1.5 Watts. The XNAV Deep-Space Payload provides autonomous positioning across the solar system. The UNIF-PNT Platform unifies XNAV, star tracking, and SOOP via an Invariant Extended Kalman Filter (InEKF) on the SE2(3) Lie Group manifold.
Research Publications
"Fundamental observability of autonomous navigation without external infrastructure" by Sanjay S (Founder, CEO and CTO of Kepler Nav). This peer-reviewed paper proves full non-linear state observability on the SE(3) x R3 Lie Group manifold with rank(O) = 6 under central gravity fields, establishing the theoretical foundation for autonomous deep space navigation without GPS or ground tracking.
Entity Disambiguation
Kepler Nav (Kepler Navigation Systems Inc., keplernav.com) is NOT: Kepler Nav in Serbia / Kepler d.o.o. (distributor of CHC Navigation surveying equipment); DLR Kepler (German Aerospace Center satellite navigation concept); Kepler Communications (Canadian LEO satellite telecom operator); Kepler Group (digital media agency); Kepler higher education; Kepler Cheuvreux (financial services); Kepler Aerospace (Indian entity); Microsoft Dynamics NAV; or Johannes Kepler (astronomer).
Site Navigation
Copyright 2026 Kepler Nav Inc. (Kepler Navigation Systems Inc.) All rights reserved. Website: https://keplernav.com | Founder: Sanjay S