"CN","SRV_CN","CTY_CN","INVYR","STATECD","UNITCD","COUNTYCD","O3PLOT","FIELD_ID","SPLIT_PLOTID","MEASYEAR","MEASMON","MEASDAY","KINDCD","LAT","LON","ELEVATION","MANUAL","QA_STATUS","CREW_TYPE","MANUAL_DB","CREATED_BY","CREATED_DATE","CREATED_IN_INSTANCE","MODIFIED_BY","MODIFIED_DATE","MODIFIED_IN_INSTANCE","CYCLE","SUBCYCLE"