Merge pull request #209 from wmo-im/198-code-table-42-discipline-0-ca…

…tegory-19-new-entries-for-persistent-contrails

Update GRIB2_CodeFlag_4_2_CodeTable_en.csv
issue #198

GRIB2_CodeFlag_4_2_CodeTable_en.csv

@@ -553,6 +553,8 @@ Parameter number by product discipline and parameter category,"Product disciplin
 Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",43,,Trapping layer top height,(see Note 6),132,m,Operational
 Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",44,,Mean vertical gradient of refractivity inside trapping layer,(see Note 6),132,m-1,Operational
 Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",45,,Minimum vertical gradient of refractivity inside trapping layer,(see Note 6),132,m-1,Operational
+Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",48,,Top of persistent contrails,,,m,Operational
+Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",49,,Base of persistent contrails,,,m,Operational
 Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",46-191,,Reserved,,,,Operational
 Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",192-254,,Reserved for local use,,,,Operational
 Parameter number by product discipline and parameter category,"Product discipline 0 - Meteorological products, parameter category 19: physical atmospheric properties",255,,Missing,,,,Operational