def METHOD_NAME(data_tm5, aeronetsunv3lev2_subset):
    data = data_tm5.copy()
    data.var_name = "od550bc"
    coldata = colocate_gridded_ungridded(data, aeronetsunv3lev2_subset, var_ref="od550aer")
    assert coldata.metadata["var_name"] == ["od550aer", "od550bc"]