2025 PTTI Distinguished Service Award

Presented to: Dr. James Camparo

Citation: For excellence in collaboration and education in addressing technical risk in the application of atomic clocks for space-based position, navigation, and timing

Dr. James Camparo has been described by his colleagues as the driving force behind the current understanding of rubidium lamps used in GPS atomic clocks, a key component of the clock’s physics package, and a reliable source of information on what GPS really needs from its frequency standards.

In 2021, Dr. Camparo and his colleague, Dr. Bernardo Jaduszliwer, collected their insights in an influential GPS Solutions article, “Past, Present, and Future of Atomic Clocks for GNSS.” After a 2015 sabbatical as a visiting researcher at the Istituto Nazionale di Ricerca Metrologica, Dr. Camparo and collaborators Dr. Valerio Formichella and Dr. Patrizia Tavella produced several publications using onorbit telemetry data to show the effect of the light-shift on the GPS clock’s contribution to the Signal-In-Space User- Range-Error. This insightful work has motivated research efforts to remove the light shift from atomic clocks (e.g., the Pulsed-Optically-Pumped atomic clock).

Collaborating with colleagues at The Aerospace Corporation, Dr. Camparo began working on laser optical-pumping for atomic clocks in the mid-1980s, and by 1999 was leading in-depth studies on laser phase-noise to amplitude-noise conversion. Today, these studies are used to evaluate the laser characteristics required for optimal laser-pumped clock performance.

Dr. Camparo is a Fellow in Aerospace’s Physical Sciences Laboratories, where his interests include research and development of the laser-pumped atomic clock, the study of atomic timekeeping onboard spacecraft, and experiments investigating the field/atom interaction. Over his 44 years at The Aerospace Corporation, Dr. Camparo has consistently served as a trusted advisor on space-based timekeeping for numerous players within the U.S. national security space enterprise. Equally impressive is his role as a teacher and mentor to a generation of technical professionals pursuing innovative, mission-critical applied science.

Dr. Camparo received his PhD from Columbia University.