Accession Number : ADA499645


Title :   Detecting Near-Earth Objects Using Cross-Correlation with a Point Spread Function


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT/DEPT OF ENGINEERING PHYSICS


Personal Author(s) : O'Dell, Anthony


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a499645.pdf


Report Date : Mar 2009


Pagination or Media Count : 72


Abstract : This thesis describes a process to help discover Near-Earth Objects (NEOs) of larger than 140 meters in diameter from ground based telescopes. The process involves using Nyquist sampling rate to take data from a ground-based telescope and measuring the atmospheric seeing parameter, r(0), at the time of data collection. r(0) is then used to create a point spread function (PSF) for a NEO at the visual magnitude limit of the telescope and exposure time. This PSF is cross-correlated with the Nyquist sampling rate image from the telescope to reduce the noise and therefore increase the detection probability of a faint NEO. The process is compared to the current detection technique of using Rayleigh sampling with a threshold detector. This process is tested versus improper seeing parameter measurement and different locations of the NEO within the charged-coupled device (CCD) pixel field of view (FOV). The biggest improvement is where the NEO is located in the corner of the pixel FOV. The new process shows improvement in detection probability over the current process in all simulations.


Descriptors :   *MATCHED FILTERS , *ASTEROIDS , *CROSS CORRELATION , *DETECTION , PROBABILITY , THESES , DATA ACQUISITION , EARTH(PLANET) , TELESCOPES , CHARGE COUPLED DEVICES , THRESHOLD EFFECTS , DETECTORS , POINTS(MATHEMATICS) , SIMULATION , MEASUREMENT


Subject Categories : Astronomy
      Electrical and Electronic Equipment
      Numerical Mathematics
      Operations Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE