The Construction and Testing of a Pair of Matched Solar Telescopes.

A pair of carefully matched telecopes and videometers were constructed and tested to determine their suitability to obtain routine standardized measurements of solar flares. Useful data were obtained from both telescopes during four flares between March 1971 and March 1972. Errors in the current international patrol are typically a factor of two. The mismatch of the areas of the four flares measured by these telescope systems was only 10, indicating the extent of the possible improvement to be obtained by careful matching and intercalibration of patrol instruments. Author