Accession Number : ADA324846

Title :   Spacecraft Identification by Multispectral Signature Analysis Using Neural Networks.

Descriptive Note : Final rept. Jun 96-Mar 97,

Corporate Author : PHILLIPS LAB KIRTLAND AFB NM

Personal Author(s) : Poelman, Conrad J. ; Meltzer, Stephanie R.

PDF Url : ADA324846

Report Date : MAR 1997

Pagination or Media Count : 31

Abstract : This study examines the feasibility of: (1) identifying satellites by their spectral signatures and (2) developing an algorithm to automate the process. The efforts of this study focus on solving the problem of crosstagging deep space objects. Crosstagging is the misnaming of a satellite which occurs when the identity of a tracked satellite is unknown or when the identities of several satellites are commingled. This problem can occur due to variations in satellite orbits and/or delays between data collection. Sunlight reflecting off of a satellite creates a spectral signature. Satellite signatures may differ due to geometry and material properties. Spectral signatures of seven satellites were simulated using an image simulation software package and high fidelity satellite models. These spectra took into account atmospheric degradation and were simulated for a variety of orbital parameters and different imaging times. These simulated signatures trained a neural network to identify the satellite. The trained network was able to accurately identify satellites based on their spectral signatures. This technology has application to the space analyst needing to identify satellites beyond the range of resolved imaging and detect anomalies on these objects.

Descriptors :   *NEURAL NETS, *RADAR TRACKING, *IDENTIFICATION SYSTEMS, *SATELLITE TRACKING SYSTEMS, COMPUTER PROGRAMS, ALGORITHMS, COMPUTERIZED SIMULATION, SPACECRAFT, EARTH ORBITS, MODELS, TRAINING, PARAMETERS, SYNTHETIC APERTURE RADAR, PROBLEM SOLVING, FEASIBILITY STUDIES, IMAGES, DATA ACQUISITION, PACKAGING, DEEP SPACE, SPACE OBJECTS, MULTISPECTRAL, PHOTOMETRY, SUNLIGHT, SPECTRUM SIGNATURES.

Subject Categories : Cybernetics
      Space Navigation and Guidance
      Active & Passive Radar Detection & Equipment
      Ground Support Sys & Facil For Space Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE