Doublet Pulse Coherent Laser Radar for Tracking of Resident Space Objects

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

Low-cost,stand-off, 2D+3D face imaging for biometric identification using Fourier transform profilometry –Update

Lockheed Martin Coherent Technologies is developing laser-based technologies for stand-off 2D+3D face imaging for biometric identification. Among other potential industrial, commercial, and governmental users, the Department of Homeland Security (DHS) and the Department of Defense (DoD) desire the ability to capture biometric data from minimally cooperative subjects with a minimally invasive system at stand-off distances. The initial applications are fixed installations for relatively large volume access points such as security check points and transportation gateways for which minimal cooperation, stand-off operation, and real-time operation are desired so that the biometric identification process will have little impact on traffic flow. Last year we presented a paper on the development and testing of a 2D+3D face imager breadboard based on th

ArcLine Guidance

Since World War II ground-to-air and air-to-air missiles have been an important part of military arsenals. The subject of Missile Guidance has been dominated over much of that time by the Proportional Navigation guidance law. The simplicity of this law has been its greatest strength, but therein also lies some of its weaknesses. Early guidance laws were required to work with the limited computer processing power of the time. Increases in processing power over the years allow us to introduce more sophisticated techniques. In this thesis we develop a new missile guidance algorithm, taking advantage of the advance in processing power. The new guidance algorithm will be designed to improve upon Proportional Navigation, effectively working in a broader range of situations. i Contents 1 Introduction 1 2 Statement of Problem 1 3 Background 1 3.1 Proportional Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3.2 Theoretical Approach . . . . . . . . . . . . . ..

2D+3D face imaging for stand-off biometric identification

We developed and tested a Fourier Transform Profilometry, 2D+3D face imager operating with subjects moving at ≤1.5 m/s at ≤25-m range with \u3c;1.4-mm resolution and range precision at 1-Hz capture rate using low cost components

Stand-off biometric identification using Fourier transform profilometry for 2D+3D face imaging

We developed and tested a Fourier Transform Profilometry, 2D+3D face imager operating with subjects moving at ≤1.5 m/s at ≤25-m range with \u3c1.4-mm resolution and range precision at 1-Hz capture rate using low cost components