抄録
In the Abel inversion the radial distribution of the emission coefficients are computed from measured values of radiance. The errors in the coefficients computed by Pearce's method are investigated. Four test curves are introduced as the shapes of radiance for which the accurate emission coefficients are known. The coefficients computed for the curve added with errors simulating observational errors are compared with the accurate coefficients. In the case of 25 divisions, the errors in the computed coefficients are about twice as large as the errors given for the curve. A method suggested to decrease the errors is as follows: An evendegree polynomial of the degree of about twelve is fitted to the error-added curve by a least squares approximation and then pearce's method is applied. This method gives coefficients which are more precise than the ones calculated by Pearce's method alone by the order of one.
