The Station Index Column is automatically calculated. The Station Index consists of 2 parts, a prefix and an index. The prefix and a start index can be set in the Survey Information dialog. The index is automatically incremented at each station. You can not directly edit this cell.
Stations at the end of an IFS or RS type shot have a Station index in the form "Index":"Sub Index" where the "Sub Index i " indicates the i'th shot at that station.