pad_look_stream::compute_directions

Source: stream/pad/Look/pad_look_stream__compute_directions.pro

 pad_look_stream::compute_directions
        Calculate the look, field and sun directions for a pad
        look-direction stream.

 Usage:
        strref -> compute_directions

 Keyword:
        rtn     If set, then compute the directions in RTN
                coordinates, else spacecraft coordinates are used.

 History:
        Original: 8/3/00; SJT