{"ob_id":61970,"names":[],"terms":[{"ob_id":9215,"label":"units","value":"1e-6","vocabulary":""},{"ob_id":22381,"label":"long_name","value":"A priori column-averaged dry-air mole fraction of atmospheric methane (ppmv).","vocabulary":""},{"ob_id":22382,"label":"var_id","value":"ap_ch4_xvmr","vocabulary":""}]}