The first step to access OSN historical data is to set a connection up to the Impala shell. The
connect_osn function returns an SSH session to the OSN infrastructure which has to be passed to all function when retrieving historical data.
We assume your credentials are store in the environment variables
OSN_IMPALA_USR for the user name and
OSN_IMPALA_PWD for the password.
you can now retrieve for example all departures from Frankfurt airport on 2019-04-22 between 10:00 and 12:00.
Note that this time interval is NOT the one for the scheduled flight departures, but rather the interval within which OSN network has first seen those flights.