The items within this code table are specialized observation or measurement types defined within the ICAO Meteorological Information Exchange Model (IWXXM). Each observation or measurement type listed herein is specified as a class in IWXXM that derives from the OM_Observation class (defined in ISO 19156, Geographic information - Observations and measurements, clause 6.2) or sub-class thereof. 2 2017-11-23T11:06:16.449Z 2017-11-23T11:07:04.785Z Code Table D-4: IWXXM observation types 1 2017-11-23T11:06:16.461Z The items within this code table are specialized observation or measurement types defined within the ICAO Meteorological Information Exchange Model (IWXXM). Each observation or measurement type listed herein is specified as a class in IWXXM that derives from the OM_Observation class (defined in ISO 19156, Geographic information - Observations and measurements, clause 6.2) or sub-class thereof. Code Table D-4: IWXXM observation types 2.1 2 The items within this code table are specialized observation or measurement types defined within the ICAO Meteorological Information Exchange Model (IWXXM). Each observation or measurement type listed herein is specified as a class in IWXXM that derives from the OM_Observation class (defined in ISO 19156, Geographic information - Observations and measurements, clause 6.2) or sub-class thereof. Code Table D-4: IWXXM observation types D-4 2014-09-03T09:52:42.186Z 2017-11-23T11:06:16.632Z ICAO IWXXM observation types 4 marq h https://plus.google.com/100578379482821123729 The items within this code table are specialized observation or measurement types defined within the ICAO Meteorological Information Exchange Model (IWXXM). Each observation or measurement type listed herein is specified as a class in IWXXM that derives from the OM_Observation class (defined in ISO 19156, Geographic information - Observations and measurements, clause 6.2) or sub-class thereof. Code Table D-4: IWXXM observation types 2014-09-03T09:52:42.114Z 1.0 bootstrap 1 IWXXM 2014-09-03T09:52:42.077Z bootstrap 1 ICAO IWXXM observation types