| Objective: ||Develop a ground-based laser transmitter and receiver system capable of performing vibrometry measurements of orbiting satellites.
|| Description: ||Development and delivery of a ground-based laser transmitter and receiver system capable of performing vibrometry measurements of orbiting satellites is desired. The delivered system should include all components required to perform operational testing on ground-based targets (laser transmitter, receiver telescope, detector, electronics, etc.). The receiver system bandwidth should be designed to measure vibration power spectral density from a few Hz to approximately 1 kHz. To perform ground-based vibrometry measurements of orbiting satellites, the system should be designed to be able to interface with existing all-reflective telescope facilities with primary aperture diameters of 0.6 m or larger. When using an existing 0.6 m diameter telescope, the system should be capable of receiving sufficient signal levels to make vibrometry measurements from non-cooperative satellites (satellites without retroreflectors) at altitudes of up to 1000 km. The design should be analyzed and compared with other laser vibrometry techniques with respect to return signal levels, accuracy of vibrometry measurements, and mitigation of target-induced speckle and atmospheric turbulence effects.
|| ||PHASE I: Define the laser transmitter and receiver design, and begin development and characterization of key components. Perform research on the feasibility and capabilities of critical and/or innovative components. Evaluate and optimize design characteristics with respect to mitigation of deleterious effects caused by target-induced speckle and atmospheric turbulence.
|| || ||PHASE II: Develop the component design, fabricate prototype hardware, and perform ground-based testing and characterization of the system using ground targets.
|| ||DUAL USE COMMERCIALIZATION: The Phase II prototype system would provide an interim operational capability at existing ground telescope facilities (such as Maui Space Surveillance System MSSS and Starfire Optical Range SOR) for monitoring the operating status of satellites, and providing change detection. The proposed system would find utility in remote monitoring of commercial satellite equipment operating status and health with minimal or no modification.
|| References: ||1. Schultz, K.I. and S. Fisher , “Ground-based laser radar measurements of satellite vibrations,” Appl. Opt., 31, 7690-7695.
2. Gatt, P., S.W Henderson, J.A. Thomson, and D.L. Bruns , “Micro-Doppler lidar signals and noise mechanisms: Theory and experiment,” Laser Radar Technology and Applications V, SPIE Vol. 4035, 422-435.
3. Otagura, W. and C. Hayes , “Microdoppler ladar systems,” Imaging Technology and Telescopes, SPIE Vol. 4091, 268-277.|
|Keywords: ||Vibrometry,laser vibrometry,satellite vibrometry, heterodyne lidar,heterodyne ladar|