This field is part of the schema "image FAIR Digital Object": An iFDO file is a human- and machine-readable file format collecting metadata of an entire image set, without including the actual image data, only references to it through persistent identifiers.


descriptionsatellite: GPS/Galileo etc., beacon: USBL etc., transponder: LBL etc., reconstructed: position estimated from other measures like cable length and course over ground


enum['satellite', 'beacon', 'transponder', 'reconstructed']