Changes in version 2.12

A correction has been made to the 2.11 version which caused values of SOBSC_EL and OBSC_EL to be written without refraction. The corrected values for 2.11 files may be obtained by adding the values from the REFRACT column. (In the case of SOBSC_EL, the REFRACT value at the midpoint of the scan should be used.) Note only files labelled with 2.11 have this problem.

It should be noted that all other fields in the FITS file remain correct, so observers using the sky positional columns will not note any difference in those values between 2.11 and 2.12.