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Thanks for this. Does the first "retrieval_altitude" in the RetrievalResults group describe the column height over which values of xco2 are averaged? What are the units of retrieval_altitude?

I'm trying to find details regarding the column height over which XCO2 measurements are averaged. Any guidance is appreciated.

I'm working with OCO-3 Level 2 CO2 data. The field "/RetrievalGeometry/retrieval_vertex_latitude" is described in the user guide as "the latitude at each of the corners of the parallelogram that defines the field-of-view." I'd expect this field to thus contain 4 data points, one ...