TED Notes:
Flight: NS-67, 15 July 2017
Payload turned on: 10:45:00 AM
Launch: 11:24:21 AM
Peak: 12:29:21 PM @altitude: 25575.6 meters
Land: At most 01:08:00 PM @39.6193933, -76.8644600
Payload Turned Off: First time since launch: 08:09:46 PM
                     Last Time: At least 8:15:46 PM, likely later
For flight data analysis I cut down the data set to:
 the time immediately after launch to the time we visually saw the payload string in the tree.
 The payload had likely been there for longer than that time.