Accession Number : ADA297133

Title :   Target Acquisition: Human Observer Performance Studies and TARGAC Model Validation.

Descriptive Note : Final rept.,

Corporate Author : HUMAN FACTORS RESEARCH INST TNO SOESTERBERG (NETHERLANDS)

Personal Author(s) : Valeton, J. M. ; Bijl, P.

PDF Url : ADA297133

Report Date : APR 1995

Pagination or Media Count : 184

Abstract : Human target acquisition performance was studied using the thermal imagery that was collected during Battlefield Emissives Sources Trials under the European Theater Weather and Obscurants, (BEST TWO), organized by NATO AC243/Panel4/RSG.l5 in 1990. Recognition and identification probabilities were measured for a large number of stationary and moving targets at ranges between 1 and 4 Ion. Target detection was not investigated in a number of carefully controlled laboratory experiments. The target acquisition model (TAROAC) was validated by comparing its predictions with observed recognition ranges. For all trials used in the observer experiments, TARGAC predictions were calculated on the basis of meteorological, target, background, and time information measured in the field. The major conclusion of the observer experiments is that the human acquisition performance depends considerably on factors such as target structure, local terrain structure, and cognitive factors. In TARGAC, these factors are not modeled. For the best two situation, the model predictions were determined solely by target size and thermal imager resolution limit. A quantitative comparison between actual and predicted recognition ranges shows that TARGAC systematically underestimates human acquisition performance: on average, observed recognition ranges are a factor of 1.8 longer than the model predictions.

Descriptors :   *OBSERVERS, *PERFORMANCE(HUMAN), *TARGET ACQUISITION, *THERMAL IMAGES, EUROPE, RATIOS, THEATER LEVEL OPERATIONS, LABORATORY TESTS, WEATHER, SIZES(DIMENSIONS), PREDICTIONS, ELECTROOPTICS, VALIDATION, MODELS, BATTLEFIELDS, HUMANS, PERFORMANCE(ENGINEERING), COMPARISON, COGNITION, TARGET RECOGNITION, PROBABILITY, FIELD TESTS, MOVING TARGETS, ACCURACY, TERRAIN, TIME, IDENTIFICATION, INFRARED IMAGES, NIGHT VISION DEVICES, VISION, TARGET DETECTION, RANGE(DISTANCE), STATIC TESTS, OBSCURATION.

Subject Categories : Psychology
      Target Direction, Range and Position Finding
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE