Remote Sensing | SRI International
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Remote Sensing

Remote sensing allows intelligence gathering from disparate sources to inform mission-critical decisions. SRI offers deep expertise to U.S. government and other clients, providing solutions in these areas and more:

  • Remote sensing in near-shore ocean environments: SRI’s Max Hammond Wavetank is used to study the detectability of submerged tethered objects.

  • Over-the-horizon (OTH) radar: Since the early 1960s, SRI has contributed significantly to every technology breakthrough in OTH radar, which can track moving targets such as aircraft and missiles at long distances and high altitudes.

  • Global Positioning System (GPS) calibration: Since 1997, SRI has been under contract to support the USAF GPS Joint Program Office by regularly monitoring the L-band transmissions of all newly launched and currently operational GPS satellites. The objective is to verify that all deployed satellites are consistently and reliably performing according to specification. SRI researchers measure signal power, code delay, frequency content, and bandwidth to verify the proper operation of the satellite constellation. Archived data enables the comparison of multiple data sets.

  • Optical remote sensing: Among its basic and applied research efforts in this area, SRI developed the first differential absorption LIDAR systems for the detection of chemical warfare agents. We have also developed fluorescence LIDARs for the detection of biological warfare agents, airborne backscatter and Raman LIDAR systems, compact digital LIDAR systems, and frequency modulation spectroscopy using near- and mid-infrared laser sources.


concept illustration of solar orbiter spacecraft approaching the sun

Solar Orbiter Heliospheric Imager (SoloHI)

SRI is developing a customized CMOS imager for the Solar Orbiter spacecraft that will allow scientists to study the sun from a closer distance than any previous mission.

SRI researcher looks at a Deep STARE imager and camera system.

Deep-STARE Imager and Camera System

To keep astronauts, equipment, and satellites out of harm’s way, SRI provides a rare capability to quickly track tens of thousands of objects in near-Earth space.