Field Definitions are Available Here
Collection
string (2048)
The expanded name of the primary sensory instrument. (e.g. Advanced Spaceborne Thermal Emission and Reflective Radiometer, Clouds and the Earth's Radiant Energy System, Human Observation).
Draws in aerosol particles from the atmosphere through filters
/Platforms/Platform/Instruments/Instrument/Technique
/gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:instrument/gmi:MI_Instrument/gmi:type/gmd:MI_SensorTypeCode/@codeListValue
Platforms and Instrument Information (ECHO)