Global Upper Air CARDS is historical digital data set DSI-6310 archived at the National Climatic Data Center (NCDC). This is meteorological upper air data. This is a historical upper air data set. Data is global for the period 1948-1963. DSI-6310 was included in the larger Comprehensive Aerological Data Set (CARDS) Upper Air data set (C00503), DSI-6305, which was quality controlled as it was ... assembled from many smaller data sets. DSI-6310 itself was not quality controlled at the NCDC. Most users should not request DSI-6310, but should instead opt for DSI-6305. Major parameters in upper air data sets are: pressure, temperature, relative humidity, and wind speed and direction. NCDC maintains this data set in archive but no longer updates nor actively distributes it. It has been superseded by the Integrated Global Radiosonde Archive (IGRA) (C00616).