| Description: lowest_detectable_opacity indicates the rough value for the smallest normal ring opacity that can be detected in the data at the resolution provided, incorporating both statistical effects and calibration uncertainties. Opacity is equal to 1-T, where the transparency T is the ratio between received signal and transmitted signal. -1.0 indicates the signal was too poor to allow the calculation of the value. Strongly recommended in labels of ring occultation observations. Not intended as a value for a table field. |