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).
Pyrheliometry
/Platforms/Platform/Instruments/Instrument/Technique
/gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:instrument/gmi:MI_Instrument/gmi:type/gmd:MI_SensorTypeCode
Platforms and Instrument Information (ECHO)