Aerospace Instrument-Making Annotation << Back THE MEASUREMENT ERROR OF THE DISTANCE AND VELOCITY OF A SPACECRAFT Yu.S. Sagdullaev, S.D. Kovin The problems of measuring the distance and relative speed of convergence of spacecraft (SC), and especially the emergence of error in the measurement of these parameters on the basis of two-dimensional television (TV) images. It determines the necessary accuracy in the measurement values presented in the form of a number of lines (items) per the image SC (its components) for a given measurement error range. An expression for determining the relative error ranging TV. It shows the relative error in distance measurement error value to determine the true number of elements (rows) of the two elements equal to the minimum duration and the image signal SC corresponding to 4 to 16 pixels (lines). Expressions in error for determin-ing the true value of the number of items (rows) for a given relative error of meas-urement of distance and relative speed of the SC. The features of the effect of changes in the relative velocity of the SC closer to the accuracy range depending on the number of measurements. Expressions for estimating uncertainty of measurement of the relative velocity of the SC. The problems associated with the formation of errors of measurement signals in the operator or automatic modes as well as their absolute and relative error. To improve the accuracy of measurement of distance and relative velocity of the SC shown a method and apparatus for measuring TV signals of short duration, which are connected with the extension length of the source signals arriving at the SC to image S-time. Key words: spacecraft, TV measurement error of measurement range and relative speed. Contacts: E-mail: sagdul@mniti.ru Pp. 12-18.