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I am working on CDR data to find important locations of user. The data I have does not have coordinates so I will be using cell-site location as user's location. But after doing some working on data I have observed something weird in data i.e CDR of a user is generated from two different locations/towers on the exact same time, those towers are spatially very far, around 8.5km, and there are also other towers in between. You can see the snaps below.

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Is it possible that this CDR records, the tower_id from which the user was called i.e it records only the id of only outgoing tower??

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