Encrypted telemetry data is a note in the Fallout 3 add-on Broken Steel.
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This note is added to the Lone Wanderer's Pip-Boy after downloading the telemetry data from the Satellite uplink terminal in the Satellite relay station during Death From Above.
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0001606684200035138800998440055566000
XXHF1VR0008BDM9QT0001JPR856BT000