SpaceX Falcon 9 booster post-mission, controlled-descent, test program | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-03-27

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Falcon_9_first-stage_landing_tests


00:01:07 1 Overview
00:03:30 2 History
00:05:49 3 Post-mission test plan
00:08:02 4 Test flights
00:08:11 4.1 Ocean touchdown attempts
00:08:20 4.1.1 Flight 6
00:10:02 4.1.2 Flight 9
00:12:07 4.1.3 Flight 10
00:13:34 4.1.4 Flight 13
00:15:10 4.1.5 Flight 15
00:16:53 4.1.6 Flight 46
00:17:01 4.1.7 Flight 48
00:17:09 4.2 Landing attempts
00:19:15 4.2.1 Flight 14
00:21:24 4.2.2 Flight 17
00:22:20 4.2.3 Flight 20: first landing on ground pad
00:24:54 4.2.4 Flight 21
00:25:44 4.2.5 Flight 22
00:26:38 4.2.6 Flight 23: first landing on a drone ship
00:27:29 4.2.7 Flight 24: first return from GTO mission
00:28:55 4.2.8 Flight 25
00:29:26 4.2.9 Flight 26
00:30:08 4.2.10 Flight 27
00:30:31 4.2.11 Flight 28
00:30:59 5 Transition to routine reuse
00:32:22 6 See also



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services/invoke/uid/0000001a130b3f91
Other Wikipedia audio articles at:
https://www.youtube.com/results?search_query=wikipedia+tts
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
Speaking Rate: 0.8541222368446717
Voice name: en-AU-Wavenet-D


"I cannot teach anybody anything, I can only make them think."
- Socrates


SUMMARY
=======
The Falcon 9 first-stage landing tests were a series of controlled-descent flight tests conducted by SpaceX between 2013 and 2016. Since 2017, the first stage of Falcon 9 missions has been routinely landed if the rocket performance allowed it, and if SpaceX chose to recover the stage. 
The program's objective was to reliably execute controlled re-entry, descent and landing (EDL) of the Falcon 9 first stage into Earth's atmosphere after the stage completes the boost phase of an orbital spaceflight. The first tests aimed to touch down vertically in the ocean at zero velocity. Later tests attempted to land the rocket precisely on an autonomous spaceport drone ship (a barge commissioned by SpaceX to provide a stable landing surface at sea) or at Landing Zone 1 (LZ-1), a concrete pad at Cape Canaveral. The first ground landing at LZ-1 succeeded in December 2015, and the first landing at sea on a drone ship in April 2016. The second landed booster, B1021, was the first to fly again in March 2017, and was recovered a second time.