Accession Number : ADA616809


Title :   Doublet Pulse Coherent Laser Radar for Tracking of Resident Space Objects


Descriptive Note : Conference paper


Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER


Personal Author(s) : Prasad, Narasimha S ; Rudd, Van ; Shald, Scott ; Sandford, Stephan ; DiMarcantonio, Albert


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a616809.pdf


Report Date : Sep 2014


Pagination or Media Count : 11


Abstract : In this paper, the development of a long range ladar system known as ExoSPEAR at NASA Langley Research Center for tracking rapidly moving resident space objects is discussed. Based on 100 W, nanosecond class, near-IR laser, this ladar system with coherent detection technique is currently being investigated for short dwell time measurements of resident space objects (RSOs) in LEO and beyond for space surveillance applications. This unique ladar architecture is configured using a continuously agile doublet-pulse waveform scheme coupled to a closed-loop tracking and control loop approach to simultaneously achieve mm class range precision and mm/s velocity precision and hence obtain unprecedented track accuracies. Salient features of the design architecture followed by performance modeling and engagement simulations illustrating the dependence of range and velocity precision in LEO orbits on ladar parameters are presented. Estimated limits on detectable optical cross sections of RSOs in LEO orbits are discussed.


Descriptors :   *OPTICAL RADAR , LASER BEAMS , MOVING TARGETS , SPACE OBJECTS , SPACE SURVEILLANCE , TRACKING


Subject Categories : Optical Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE