Decimal point assumed left. S Revolution number at epoch. T Checksum of line two. At the end of each line of data is a checksum number that is a check on the accuracy of the data. Add all individual columns in a line except the checksum number.
Numbers are equal to their numerical value.
The units digit of the sum of all the columns is the check- sum number. Find the checksum of -123.45U This number starts off with a minus sign. Each individual number has a value equal to its numerical value when adding the checksum. The checksum number is the units digit of the sum. If you are adding up the checksum of a long string of characters, you can do it in your head.