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Autonomous spaceport drone ship

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Autonomous spaceport drone ship
Of Course I Still Love You carries the first rocket stage to successfully land on a drone ship (CRS-8, 8 April 2016)
Launch site
Location
Short nameASDS
OperatorSpaceX
Just Read the Instructions (I) landing history
StatusRetired (May 2015)
Landings2 (0 success, 2 failures)
First landing10 January 2015
(CRS-5)
Last landing14 April 2015
(CRS-6)
Associated
rockets
Of Course I Still Love You landing history
StatusActive
Landings114 (106 successes, 7 failures, 1 partial failure)
First landing4 March 2016
(SES-9)
Last landing30 October 2024
(Starlink Group 9-9)
Associated
rockets
Just Read the Instructions (II) landing history
StatusActive
Landings95 (93 successes, 1 failure, 1 partial failure)
First landing17 January 2016
(Jason-3)
Last landing26 October 2024
(Starlink Group 10-8)
Associated
rockets
A Shortfall of Gravitas landing history
StatusActive
Landings84 (83 successful, 1 failure)
First landing29 August 2021
(CRS-23)
Last landing30 October 2024
(Starlink Group 10-13)
Associated
rockets

An autonomous spaceport drone ship (ASDS) is a modified ocean-going barge equipped with propulsion systems to maintain precise position and a large landing platform. SpaceX developed these vessels to recover the first stage (also called the booster) of its launch vehicles. By recovering and reusing these boosters, SpaceX has significantly reduced the cost of space launch.

SpaceX operates three ASDS: Just Read the Instructions (II) (JRTI), A Shortfall of Gravitas (ASOG), and Of Course I Still Love You (OCISLY). JRTI and ASOG operate from Port Canaveral supporting launches from Kennedy Space Center and Cape Canaveral Space Force Station landing in the Atlantic Ocean, while OCISLY operates from the Port of Long Beach supporting launches from Vandenberg Space Force Base landing in the Pacific Ocean.

Depending on mission requirements, SpaceX can return the booster to the launch site for a ground landing, land the booster at sea on an ASDS, or discard it. While a ground landing is the least expensive option, it requires the most fuel and thus reduces payload capacity. Sea landings offer a balance of cost and performance, making them the most common choice, used on approximately three-quarters of missions.

History

[edit]

In 2009, SpaceX CEO Elon Musk articulated ambitions for "creating a paradigm shift in the traditional approach for reusing rocket hardware".[1] In October 2014, SpaceX announced that they had contracted with a Louisiana shipyard to build a floating landing platform for reusable orbital launch vehicles. Early information indicated that the platform would carry an approximately 90 m × 50 m (300 ft × 160 ft) landing pad and would be capable of precision positioning so that the platform could hold its position for launch vehicle landing.[2][3] On 22 November 2014, Musk released a photograph of the "autonomous spaceport drone ship" along with additional details of its construction and size.[1][4]

As of December 2014, the first drone ship used, the McDonough Marine Service's Marmac 300 barge, was based in Jacksonville, Florida, at the northern tip of the JAXPORT Cruise Terminal, where SpaceX built a stand to secure the Falcon stage during post-landing operations. The stand consisted of four 6,800 kg (15,000 lb), 270 cm (110 in) tall and 244.5 cm (96.3 in) wide pedestal structures bolted to a concrete base. A mobile crane would have lifted the stage from the ship and placed it on the stand. Tasks such as removing or folding back the landing legs prior to placing the stage in a horizontal position for trucking would have been undertaken while the booster was on the stand.[5]

The ASDS landing location for the first landing test was in the Atlantic approximately 320 km (200 mi) northeast of the launch location at Cape Canaveral, and 266 km (165 mi) southeast of Charleston, South Carolina.[6][7]

On 23 January 2015, during repairs to the ship following the unsuccessful first test, Musk announced that the ship was to be named Just Read the Instructions,[8] with a sister ship planned for West Coast launches to be named Of Course I Still Love You (OCISLY).[9] On 29 January 2015, SpaceX released a manipulated photo of the ship with the name illustrating how it would look once painted.[10]

The first Just Read the Instructions was retired in May 2015 after approximately six months of service in the Atlantic Ocean, and its duties were assumed by Of Course I Still Love You.[11] The former ASDS was modified by removing the wing extensions that had extended the barge surface and the equipment (thrusters, cameras, and communications gear) that had been added to refit it as an ASDS; these items were saved for future reuse.[11]

In 2018, Elon Musk announced plans for an additional barge, A Shortfall of Gravitas (ASOG), to support East Coast operations[12] but the build of the droneship was delayed, and instead JRTI was moved to the East Coast and began operations in June 2020.[citation needed] ASOG was completed in July 2021.[13]

By June 2020, SpaceX had received the ability to use "its own private Automatic Identification System (AIS) aids to navigation (ATON) to mark the temporary exclusion areas it uses during rocket launches [from] Cape Canaveral, Florida", the first such use of dynamic restricted area ever approved by the U.S. Coast Guard.[14]

Fleet

[edit]
Vessel Home Port Status
Just Read The Instructions (I) Scrapped
Of Course I Still Love You Long Beach Active
Just Read The Instructions (II) Port Canaveral Active
A Shortfall of Gravitas Port Canaveral Active

Just Read the Instructions (I)

[edit]
Just Read the Instructions (I)

SpaceX's first ASDS was named Just Read the Instructions (JRTI). Converted from the existing Marmac 300 barge, JRTI served as a testbed for just two landing attempts, SpaceX CRS-5 and SpaceX CRS-6, the latter of which ended with the booster toppling over and exploding, damaging JRTI beyond repair on 14 April 2015.[15]

Of Course I Still Love You

[edit]
Of Course I Still Love You

SpaceX's second ASDS, Of Course I Still Love You (OCISLY) was constructed in a Louisiana shipyard beginning in early 2015 on the Marmac 304 hull. While the dimensions of the ship are nearly identical to the original JRTI, OCISLY incorporated improvements including a steel blast wall. Initially intended for West Coast operations, OCISLY's role shifted after the loss of the original JRTI in April 2015. The ship entered service in late June 2015, based in Jacksonville, Florida, before relocating to Port Canaveral later that year.

OCISLY achieved a historic first on April 8, 2016, successfully landing the first stage of the Dragon SpaceX CRS-8 mission.[16] Despite sustaining damage during the Falcon Heavy Test Flight in February 2018, the ship was repaired and continued operations.[17][18] Another notable moment came on May 30, 2020, when OCISLY captured the first stage of the Crew Dragon Demo-2 mission, marking the return of human spaceflight from U.S. soil.[19][20]

In 2021, OCISLY was relocated to the Port of Long Beach to support West Coast launches from Vandenberg.[21][22][23][24]

Just Read the Instructions (II)

[edit]
Falcon 9 on Just Read The Instructions (II)

The third ASDS barge was named Just Read The Instructions, using the Marmac 303 barge hull. It was converted during 2015 in a Louisiana shipyard. When the refit as an ASDS was complete, the barge transited the Panama Canal in June 2015, carrying its wing extensions (– the same ones originally built for the first ASDS-built JRTI on Marmac 330 –) as cargo on the deck because the ASDS, when complete, would be too wide to pass through the canal.[11][9] The ship underwent a major refit in September 2019 to May 2020, initially in Louisiana, and finishing at Port Canaveral, including four new, much larger, positioning thrusters.

The home port for the Marmac 303 was initially the Port of Los Angeles (until in August 2019) at the Altana Sea marine research and business campus in San Pedro, California's outer harbor.[25] The landing platform and tender vessels began docking there in July 2015 in advance of the main construction of the AltaSea facilities.[26][27]

SpaceX announced that the Marmac 303 would be the second ASDS to be named Just Read the Instructions in January 2016, shortly before its first use as a landing platform for Falcon 9 Flight 21.[28]

On 17 January 2016, JRTI was put to first use in an attempt to recover a Falcon 9 first-stage booster from the Jason-3 mission from Vandenberg Space Launch Complex 4.[11] The booster successfully landed on the deck; however, a lockout collet failed to engage on one of the legs, causing the first stage to tip over, exploding on impact with the deck.[29] On 14 January 2017, SpaceX launched Falcon 9 flight 29 from Vandenberg Air Force Base and landed the first stage on the JRTI, which was located about 370 km (230 mi) downrange in the Pacific Ocean, making it the first successful landing in the Pacific.[30]

In August 2019, JRTI left the Port of Los Angeles to be towed to the Gulf of Mexico; it transited through the Panama Canal.[31] JRTI arrived in Morgan City, Louisiana in late August 2019 and stayed there until December 2019 then moved to Port Canaveral.[32]

JRTI is based at Port Canaveral and began operations in the Atlantic in June 2020, supporting the first time a Falcon 9 would land after a 5th use.[citation needed]

A Shortfall of Gravitas

[edit]
Falcon 9 on A Shortfall of Gravitas

A fourth ASDS, A Shortfall of Gravitas (ASOG), was announced in February 2018 and was originally planned to enter service in mid-2019.[33][34] It was made by modifying Marmac 302. In October 2020, Elon Musk re-affirmed plans to build a ship of this name.[35] In January 2021, Marmac 302 was spotted at Bollinger Fourchon site.[36] On 6 April 2021, NASASpaceFlight.com spotted the Octagrabber presumed to be for A Shortfall of Gravitas at the Cidco Road facility in Cocoa Beach, Florida. It may have originated as an upgraded Octagrabber for Just Read The Instructions.[37] By mid April 2021, Marmac 302 had scaffolding to prepare for construction, which was confirmed on 9 May 2021.[38] It joined the East Coast fleet in July, after sending OCISLY[39] to the West Coast in July 2021.[36]

On 9 July 2021, Elon Musk tweeted aerial footage of the completed drone ship in the Gulf of Mexico while undergoing its first sea-trials. According to him, this drone ship will not require a tug boat to be towed to the landing area. ASOG is used to support rocket launches from a base at Port Canaveral.[13] After completing a sea trial in Port Fourchon, transiting over the Gulf of Mexico while being towed by Finn Falgout from its construction port, Port Fourchon to its recovery base, Port Canaveral, arriving at 16:47 UTC on 15 July 2021, and completing a number of sea trials, it successfully completed its first booster landing attempt for a Falcon 9 first-stage booster B1061.4 being used in CRS-23 mission at 300 km downrange in the Atlantic Ocean, becoming the first ASDS to land a first stage booster in its maiden landing attempt.[40][41][42]

ASOG is based at Port Canaveral to support east coast recovery operations.

Characteristics

[edit]
Autonomous spaceport drone ship
History
NameJust Read the Instructions[10]
OwnerMcDonough Marine Service
OperatorSpaceX
In serviceNovember 2014
Out of serviceMay 2015
StatusRetired
General characteristics as drone ship
(2014–present)
Length300 ft (91 m) [43]
Beam170 ft (52 m)[43]
Depth19.8 ft (6.0 m)[44]
Installed powerGenerator units
Propulsion4 × 300 hp (220 kW) azimuth thrusters with 40 in (1.0 m) nozzles, as of January 2015[45]
NotesAutonomous or remote-controlled operation modes are available during rocket landing operations[6]

The ASDS are autonomous vessels capable of precision positioning, originally stated to be within 3 m (9.8 ft) even under storm conditions,[4] using GPS position information[46] and four diesel-powered azimuth thrusters.[47] In addition to the autonomous operating mode, the ships may also be telerobotically controlled.[6]

The azimuth thrusters are hydraulic propulsion outdrive units with modular diesel-hydraulic-drive power units manufactured by Thrustmaster, a marine equipment manufacturer in Texas.[1] The returning first stage must not only land within the confines of the deck surface, but must also deal with ocean swells and GPS errors.[1][48]

SpaceX equips the ships with a variety of sensor and measurement technology to gather data on the booster returns and landing attempts, including commercial off the shelf GoPro cameras.[49]

At the center of the ASDS landing pads is a circle that encloses the SpaceX stylized "X" in an X-marks-the-spot landing point.[50]

Names

[edit]

The ASDS have names that are the same as or similar to[51] spaceships that appear in the Culture series of science fiction novels by Iain M. Banks.[13][52]

Just Read the Instructions (Marmac 300)

[edit]

The landing platform of the upper deck of the first barge named Just Read the Instructions was 170 ft × 300 ft (52 m × 91 m), while the span of the Falcon 9 v1.1 landing legs was 60 ft (18 m).[1][48]

Of Course I Still Love You (Marmac 304)

[edit]
Side view of OCISLY docked in March 2017

Of Course I Still Love You is registered as 1247500 was built as a refit of the barge Marmac 304 for landings in the Atlantic Ocean. Its homeport was Port Canaveral, Florida, from December 2015 to June 2021, after being ported for a year at the Port of Jacksonville during most of 2015. Of Course I Still Love You worked successfully as a landing platform after the Falcon 9 rocket brought astronauts to space on the crewed mission Demo-2 on 30 May 2020.[citation needed] In June 2021, OCISLY was transported to the Port of Long Beach to begin supporting launches on the west coast.[23] On 8 July 2021, OCISLY was docked in Long Beach after transiting the Panama Canal. It is the first ASDS where 50th and 100th successful landings of a particular ASDS were first achieved.

Just Read the Instructions (Marmac 303)

[edit]
Falcon 9 landed on JRTI post Iridium-2 mission

Just Read the Instructions, the second barge with that name, is registered as 1245062 with MMSI 368219920, and was built as a refit of the barge Marmac 303 in 2015 for landings in the Pacific Ocean. Its homeport was in the Port of Los Angeles, California from 2015 to 2019[53] but in August 2019 it was moved to the Gulf of Mexico.[31] After undergoing upgrades and refurbishment, in December 2019 it was moved to Cape Canaveral.[54] After several months of additional work, including installation of new thrusters, Just Read the Instructions went back into service in June 2020 with booster recovery from Starlink v1.0 L7 mission.[55]

A Shortfall of Gravitas (Marmac 302)

[edit]
ASOG returns Falcon 9 B1060 to Port Canaveral after its 10th flight

The fourth ASDS, named A Shortfall of Gravitas,[56] is registered as 1240683 with MMSI 368219910 and was mentioned by SpaceX in February 2018[citation needed] and again in October 2020 to help support East Coast launches.[35] In May 2021, conversion of Marmac 302 into ASOG began and was expected to move to the East Coast for operation in the following months.[57] A Shortfall of Gravitas underwent its first sea trials on 9 July 2021, and a short video of the ship underway was shared on Twitter by Elon Musk.[13] After completing the sea trials, it was towed by Finn Falgout from its construction port, Port Fourchon, to its recovery base, Port Canaveral, arriving 15 July 2021.[58][59][60]

Operation

[edit]

A tug is used to bring the ASDS to its oceanic position, and a support ship stands by some distance away from the unmanned ASDS.[61] Following landing, technicians and engineers typically board the landing platform and secure the rocket's landing legs to lock the vehicle in place for transport back to port.[6] The first stage is secured to the deck of the drone ship with steel hold-downs welded on to the feet of the landing legs.[62] In June 2017, OCISLY started being deployed with a robot that drives under the rocket and grabs onto the hold-down clamps located on the outside of the Falcon 9's structure after landing.[63] The robot is officially called the "octagrabber".[64]

Vessel missions

[edit]

The first flight test was 10 January 2015,[65] when SpaceX conducted a controlled-descent flight test to land the first stage of Falcon 9 Flight 14 after it helped to loft a contracted payload into Earth orbit.[2][3] Before the first landing attempt, SpaceX estimated that the likelihood of a successful landing on the platform would be 50% or less.[1][3] The landings went from being landing tests to become routine parts of missions.

Autonomous spaceport drone ship (ASDS) Statistics

[edit]

Usage

[edit]
10
20
30
40
50
60
70
80
90
'15
'16
'17
'18
'19
'20
'21
'22
'23
'24
  •   Just Read The Instructions (I) (Marmac 300)
  •   Of Course I Still Love You (Marmac 304)
  •   Just Read The Instructions (Marmac 303)
  •   A Shortfall of Gravitas (Marmac 302)

Booster landings

[edit]
25
50
75
100
125
150
'10
'11
'12
'13
'14
'15
'16
'17
'18
'19
'20
'21
'22
'23
'24
  •   Ground-pad failure
  •   Drone-ship failure
  •   Ocean test failure[a]
  •   Parachute test failure[b]
  •   Ground-pad success
  •   Drone-ship success
  •   Ocean test success[c]
  •   No attempt

Mission details

[edit]

See also

[edit]

Notes

[edit]
  1. ^ Controlled descent; ocean touchdown control failed; no recovery
  2. ^ Passive reentry failed before parachute deployment
  3. ^ Controlled descent; soft vertical ocean touchdown; no recovery

References

[edit]
  1. ^ a b c d e f Bergin, Chris (24 November 2014). "SpaceX's Autonomous Spaceport Drone Ship ready for action". NASASpaceFlight.com. Archived from the original on 26 July 2019. Retrieved 24 November 2014.
  2. ^ a b Foust, Jeff (25 October 2014). "Next Falcon 9 Launch Could See First-stage Platform Landing". SpaceNews. Archived from the original on 16 March 2015. Retrieved 25 October 2014.
  3. ^ a b c Bullis, Kevin (26 October 2014). "SpaceX Plans to Start Reusing Rockets Next Year". MIT Technology Review. Archived from the original on 25 October 2014. Retrieved 25 October 2014.
  4. ^ a b @elonmusk (22 November 2014). "Autonomous spaceport drone ship. Thrusters repurposed from deep sea oil rigs hold position within 3m even in a storm" (Tweet). Archived from the original on 25 November 2014 – via Twitter.
  5. ^ "DRAFT Environmental Assessment for the Space Exploration Technologies Vertical Landing of the Falcon Vehicle and Construction at Launch Complex 13 at Cape Canaveral Air Force Station Florida" (PDF). U.S. Air Force. October 2014. p. 17. Archived from the original (PDF) on 8 January 2015. Retrieved 8 January 2015. Public Domain This article incorporates text from this source, which is in the public domain.
  6. ^ a b c d Harwood, William (16 December 2014). "SpaceX readies rocket for station launch, barge landing". CBS News. Archived from the original on 18 December 2019. Retrieved 23 December 2014. A 300-foot-long barge will be used as an off-shore landing platform during launch of a SpaceX Falcon 9 rocket Friday. The primary goal of the flight is to deliver critical supplies and equipment to the space station, but SpaceX hopes to land the rocket's first-stage on the barge for possible refurbishment and reuse – a key milestone in the company's push to reduce launch costs.
  7. ^ Clark, Stephen (16 December 2014). "Photos: SpaceX's autonomous spaceport drone ship". Spaceflight Now. Archived from the original on 23 April 2019. Retrieved 16 December 2014.
  8. ^ @elonmusk (23 January 2015). "Repairs almost done on the spaceport drone ship and have given it the name "Just Read the Instructions"" (Tweet) – via Twitter.
  9. ^ a b @elonmusk (23 January 2015). "West Coast droneship under construction will be named "Of Course I Still Love You"" (Tweet) – via Twitter.
  10. ^ a b @elonmusk (29 January 2015). "Painting the name on the droneship ..." (Tweet) – via Twitter.
  11. ^ a b c d e "SpaceX Augments and Upgrades Drone Ship Armada". NASASpaceFlight.com. 18 June 2015. Archived from the original on 23 September 2019. Retrieved 18 June 2015.
  12. ^ SpaceX to attempt five recoveries in less than two weeks as fleet activity ramps up. Archived 22 November 2019 at the Wayback Machine, NASASpaceFlight.com, 19 July 2018, accessed 2 August 2018.
  13. ^ a b c d Arevalo, Evelyn (9 July 2021). "Elon Musk Shows Off New SpaceX Falcon 9 Autonomous Droneship -'A Shortfall Of Gravitas'". Tesmanian. Archived from the original on 11 July 2021. Retrieved 11 July 2021.
  14. ^ "SpaceX Gets its Own AIS Aids to Navigation Markers". Maritime Executive. Archived from the original on 27 June 2020. Retrieved 27 June 2020. The company's non-charted safety zones will be established from Cape Canaveral, Florida, into the Atlantic Ocean in four different areas, which will be activated individually based on the rocket's planned flight path. The safety zones are designed to keep vessels from entering the area while a launch is taking place. ... [Previously, the] periodic activations have been announced to the maritime community through the Coast Guard Notice to Mariners and Local Notice to Mariners
  15. ^ "Just Read the Instructions - SpaceX Droneship". space-offshore.com. Retrieved 3 April 2024.
  16. ^ "SpaceX Rocket Makes Spectacular Landing on Drone Ship". National Geographic. 8 April 2016. Archived from the original on 20 April 2016. Retrieved 10 April 2016.
  17. ^ a b SpaceX (6 February 2018). "Space X News Conference". youtube.com. Archived from the original on 5 December 2018. Retrieved 6 February 2018.
  18. ^ "SpaceX's drone ship fleet spied prepping for future rocket recoveries". Teslarati. 26 March 2018. Archived from the original on 18 December 2019. Retrieved 27 March 2018.
  19. ^ Potter, Sean (30 May 2020). "NASA Astronauts Launch from America in Test of SpaceX Crew Dragon". NASA. Archived from the original on 23 March 2021. Retrieved 30 May 2020. Public Domain This article incorporates text from this source, which is in the public domain.
  20. ^ "SpaceX Crew Dragon Demo-2 Key Launch Information". Launch360. Archived from the original on 28 May 2020. Retrieved 30 May 2020.
  21. ^ "SpaceX closes in on West Coast Starlink launches with lease for drone ship dock space". Teslarati. 26 April 2021. Archived from the original on 27 April 2021. Retrieved 27 April 2021.
  22. ^ Ralph, Eric (10 June 2021). "SpaceX drone ship heads to the Bahamas for its ride to California". Teslarati. Archived from the original on 11 June 2021. Retrieved 16 June 2021.
  23. ^ a b @SpaceXFleet (16 June 2021). "Of Course I Still Love You droneship and MS1 have departed from Freeport and are en-route to the Panama Canal!" (Tweet) – via Twitter.
  24. ^ CRS-6 First Stage Landing, 15 April 2015, archived from the original on 18 March 2021, retrieved 14 March 2021.
  25. ^ "Just Read the Instructions". SpaceX. Archived from the original on 9 December 2019. Retrieved 9 December 2019.
  26. ^ "SpaceX Planning To Base Rocket, Spacecraft Retrieval at Port of Los Angeles". CBS Los Angeles. 18 June 2015. Archived from the original on 19 June 2015. Retrieved 18 June 2015.
  27. ^ Littlejohn, Donna (18 June 2015). "Groundbreaking partnership announced between SpaceX and AltaSea in San Pedro". Redlands Daily Facts. Archived from the original on 2 August 2020. Retrieved 19 June 2015.
  28. ^ Graham, William (17 January 2016). "SpaceX Falcon 9 v1.1 set for Jason-3 launch". NASASpaceFlight.com. Archived from the original on 18 January 2016. Retrieved 17 January 2016. For the barge that will be used, an ASDS based on the Marmac 303 barge and bearing the name Just Read the Instructions, it will be the first recovery attempt. The name "Just Read the Instructions", an homage to the literary works of Iain M. Banks, was previously borne by the first ASDS, based on the Marmac 300 barge.
  29. ^ Pasztor, Andy (17 January 2016). "SpaceX Stumbles, as Booster Landing Fails". The Wall Street Journal. Archived from the original on 19 January 2016. Retrieved 19 January 2016.
  30. ^ "SpaceX returns to flight, nails rocket landing". CNN. 14 January 2017. Archived from the original on 15 January 2017. Retrieved 14 January 2017.
  31. ^ a b "SpaceX sends Falcon 9's West Coast drone ship to the Panama Canal in surprise move". 6 August 2019. Archived from the original on 13 August 2019. Retrieved 15 August 2019.
  32. ^ @NextHorizonsSF (10 December 2019). "Just Read The Instructions arrives in @PortCanaveral! We now have 2 East Coast droneships! You can see lots of stuff on the deck, including 6 new massive thrusters for station keeping" (Tweet). Retrieved 14 January 2020 – via Twitter.
  33. ^ Kelly, Emre (12 February 2018). "Elon Musk: New SpaceX drone ship, A Shortfall of Gravitas, coming to East Coast". Florida Today. Archived from the original on 14 February 2018. Retrieved 13 February 2018.
  34. ^ @elonmusk (28 July 2018). "Probably ships next summer" (Tweet) – via Twitter.
  35. ^ a b Elon Musk on Twitter: New SpaceX droneship will be called "A Shortfall of Gravitas". Archived 4 October 2020 at the Wayback Machine.
  36. ^ a b Gavalar (9 May 2021). "Where is A Shortfall of Gravitas Droneship?". SpaceX. Archived from the original on 9 May 2021. Retrieved 10 May 2021.
  37. ^ Bergeron, Julie (6 April 2021). "New permits shed light on activity at SpaceX's Cidco and Roberts Road facilities". NASASpaceFlight.com. Archived from the original on 7 April 2021. Retrieved 8 April 2021.
  38. ^ "newest droneship "A Shortfall of Gravitas?"". Twitter. Archived from the original on 9 May 2021. Retrieved 10 May 2021.
  39. ^ @SpaceXFleet (10 June 2021). "It's OCISLY departure time! After 43 successful East Coast landings, OCISLY if off to enjoy a more relaxed life on the West Coast" (Tweet) – via Twitter.
  40. ^ @ElonMusk (15 July 2021). "ASOG after reaching Port Canaveral" (Tweet) – via Twitter.
  41. ^ @GavCornwell (25 August 2021). "ASOG departs from Port Canaveral for CRS-23 Mission" (Tweet) – via Twitter.
  42. ^ "Dragon CRS-2 SpX-23 | Falcon 9 Block 5". Everyday Astronaut. 24 August 2021. Archived from the original on 25 August 2021. Retrieved 25 August 2021.
  43. ^ a b "SpaceX CRS-5: Grid-Fins and a Barge". Spaceflight Insider. 25 November 2014. Archived from the original on 5 January 2015. Retrieved 4 January 2015.
  44. ^ "MARMAC 300 (1063184)". Boat Database. Archived from the original on 16 March 2016. Retrieved 17 December 2014.
  45. ^ "SpaceX Autonomous Spaceport Drone Ship Sets Sail for Tuesday's CRS-5 Rocket Landing Attempt". America Space. January 2015. Archived from the original on 4 April 2015. Retrieved 9 April 2015.
  46. ^ Dean, James (24 October 2014). "SpaceX to attempt Falcon 9 booster landing on floating platform". Archived from the original on 5 September 2015. Retrieved 27 October 2014.
  47. ^ "SpaceX Announces Spaceport Barge Positioned by Thrustmaster's Thrusters". Thrustmaster. 22 November 2014. Archived from the original on 7 December 2014. Retrieved 23 November 2014. Archived 23 November 2014 at archive.today
  48. ^ a b Bergin, Chris (18 November 2014). "Pad 39A – SpaceX laying the groundwork for Falcon Heavy debut". NASASpaceFlight.com. Archived from the original on 19 November 2014. Retrieved 17 November 2014.
  49. ^ .Shotwell, Gwynne (3 February 2016). Gwynne Shotwell comments at Commercial Space Transportation Conference. Commercial Spaceflight. Event occurs at 2:43:15–3:10:05. Archived from the original on 11 March 2021. Retrieved 4 February 2016. Those are GoPro cameras by the way, unbelievable technology. We fly many of them. ... Our third attempt to land on a drone ship ... this past January ... we did stick the landing, we stuck it and then we unstuck it. ... I love these videos. I think these videos are great! You learn so much from this activity. ... for all of you curmudgeons who say that was a failure, you're totally wrong. We landed. We broke a leg. We learned a little bit. And we're going to land again. ... this is the previous version of the rocket. The landing legs weren't quite as robust ... from a previous design era.
  50. ^ Chris Bergin (24 November 2014). "SpaceX's Autonomous Spaceport Drone Ship ready for action". NASASpaceFlight.com. Archived from the original on 26 July 2019. Retrieved 23 January 2017.
  51. ^ Howell, Elizabeth (12 July 2021). "Elon Musk unveils SpaceX's newest drone ship for rocket landings at sea". Space.com. Archived from the original on 27 August 2021. Retrieved 29 August 2021.
  52. ^ Wall, Mike (4 February 2015). "Elon Musk Names SpaceX Drone Ships in Honor of Sci-Fi Legend". SPACE.com. Archived from the original on 2 June 2020. Retrieved 30 June 2015.
  53. ^ a b "SpaceX rocket docks at San Pedro home port after successful mission". Dailynews.com. 17 January 2017. Archived from the original on 3 February 2017. Retrieved 31 January 2017.
  54. ^ Baylor, Michael (11 December 2019). "SpaceX's Just Read the Instructions droneship arrives in Florida following upgrades". NASASpaceFlight.com. Retrieved 13 September 2023.
  55. ^ Fletcher, Colin (3 June 2020). "SpaceX Launches Eighth Starlink Mission, Read The Instructions With East Coast Droneship Debut". NASASpaceFlight.com. Retrieved 14 September 2023.
  56. ^ "Elon Musk on Twitter: "New SpaceX droneship will be called "A Shortfall of Gravitas"" / Twitter". Twitter. Archived from the original on 4 October 2020. Retrieved 5 October 2020.
  57. ^ Gavalar (9 May 2021). "Where is A Shortfall of Gravitas Droneship?". SpaceXFleet.com. Archived from the original on 9 May 2021. Retrieved 10 May 2021.
  58. ^ @GavinCornwell (13 July 2021). "ASOG going to Port Canaveral" (Tweet) – via Twitter.
  59. ^ @HarryStranger (13 July 2021). "ASOG spotted being towed, enroute to Port Canaveral" (Tweet) – via Twitter.
  60. ^ "ASOG towed to its recovery operations base, Port Canaveral". Marine Traffic. 13 July 2021. Archived from the original on 13 July 2021. Retrieved 13 July 2021.
  61. ^ "SpaceX Autonomous Spaceport Drone Ship Sets Sail for Tuesday's CRS-5 Rocket Landing Attempt". America Space. 4 April 2015. Archived from the original on 4 January 2018. Retrieved 20 December 2017.
  62. ^ Bergin, Chris (12 April 2016). "Falcon 9 first stage sails into Port Canaveral atop ASDS – ahead of big plans". NASASpaceFlight.com. Archived from the original on 9 December 2020. Retrieved 16 January 2017.
  63. ^ 29 June 2017 SpaceX debuts 'Optimus Prime' Robot, successfully recovers Falcon 9 1029 for the second time. Archived 22 December 2017 at the Wayback Machine. Teslarati.
  64. ^ "Facebook". www.facebook.com. Retrieved 29 May 2024.
  65. ^ Bergin, Chris (17 December 2014). "SpaceX confirms CRS-5 launch slip to 6 January". NASASpaceFlight.com. Archived from the original on 21 June 2019. Retrieved 18 December 2014.
  66. ^ a b Clark, Stephen (10 January 2015). "Dragon successfully launched, rocket recovery demo crash lands". Spaceflight Now. Archived from the original on 19 June 2015. Retrieved 10 January 2015.
  67. ^
  68. ^ @elonmusk (11 February 2015). "Rocket soft landed in the ocean within 10m of target & nicely vertical! High probability of good droneship landing in non-stormy weather" (Tweet) – via Twitter.
  69. ^ @elonmusk (14 April 2015). "Ascent successful. Dragon enroute to Space Station. Rocket landed on droneship, but too hard for survival" (Tweet) – via Twitter.
  70. ^ @elonmusk (14 April 2015). "Looks like Falcon landed fine, but excess lateral velocity caused it to tip over post landing" (Tweet) – via Twitter.
  71. ^ Harwood, William (28 June 2015). "SpaceX Falcon 9 rocket destroyed in launch mishap". CBS News. Archived from the original on 13 September 2020. Retrieved 28 June 2015.
  72. ^ "SpaceX Plans Drone Ship Rocket Landing for Jan. 17 Launch" Archived 1 December 2017 at the Wayback Machine NBC News, 7 January 2016, accessed 12 January 2016
  73. ^ Jason-3 Hosted Webcast. SpaceX. 17 January 2016. Event occurs at 1:06:30 (25:20 after lift-off). Archived from the original on 25 July 2019. Retrieved 17 January 2016.
  74. ^ @SpaceX (17 January 2016). "First stage on target at droneship but looks like hard landing; broke landing leg. Primary mission remains nominal → http://spacex.com/webcast" (Tweet) – via Twitter.
  75. ^ @elonmusk (17 January 2016). "However, that was not what prevented it being good. Touchdown speed was ok, but a leg lockout didn't latch, so it tipped over after landing" (Tweet) – via Twitter.
  76. ^ Boyle, Alan (17 January 2016). "SpaceX rocket launches satellite, but tips over during sea landing attempt". Geek Wire. Archived from the original on 30 January 2016. Retrieved 18 January 2016.
  77. ^ "SpaceX: ice buildup may have led rocket to tip over". The Washington Post. 18 January 2016. Archived from the original on 10 March 2016. Retrieved 18 January 2016. Musk tweeted that the lockout collet on one of the rocket's four legs didn't latch, causing it to tip over after landing. He said the "root cause may have been ice buildup due to condensation from heavy fog at liftoff".
  78. ^ Elon Musk [@elonmusk] (5 March 2016). "Rocket landed hard on the drone ship. Didn't expect this one to work (v hot reentry), but next flight has a good chance" (Tweet) – via Twitter.
  79. ^ ASDS March 21, 2016 (OCISLY) Archived 22 November 2020 at the Wayback Machine YouTube
  80. ^ "Watch SpaceX achieve first-ever sea landing of reusable rocket". Los Angeles Times. 7 April 2016. Archived from the original on 10 September 2020. Retrieved 14 April 2016.
  81. ^ a b Chris, Bergin (12 April 2016). "Falcon 9 first stage sails into Port Canaveral atop ASDS – ahead of big plans". NASASpaceFlight.com. Archived from the original on 9 December 2020. Retrieved 13 April 2016.
  82. ^ SpaceX successfully lands its Falcon 9 rocket on a floating drone ship again Archived 17 February 2017 at the Wayback Machine The Verge Retrieved 6 May 2016
  83. ^ http://www.floridatoday.com/story/tech/science/space/2016/05/27/spacex-launches-falcon9-rocket-lands-first-stage-atlantic-ocean-drone-ship-thaicom8/85051798/ Archived 25 September 2020 at the Wayback Machine SpaceX lands fourth booster after successful Falcon 9 launch] Florida Today Retrieved 27 May 2016
  84. ^ Live coverage: Pioneering telecom satellites launching today on Falcon 9 Archived 17 November 2020 at the Wayback Machine Spaceflight Now Retrieved 15 June 2016.
  85. ^ @elonmusk (15 June 2016). "Ascent phase & satellites look good, but booster rocket had a RUD on droneship" (Tweet) – via Twitter.
  86. ^ Clark, Stephen (14 August 2016). "Falcon 9 rocket launches Japanese satellite, then nails bullseye landing". Spaceflight Now. Archived from the original on 8 November 2020. Retrieved 14 August 2016.
  87. ^ @SpaceX (14 January 2017). "First stage has landed on Just Read the Instructions" (Tweet) – via Twitter.
  88. ^ Azadeh Ansari and Jackie Wattles (14 January 2017). "SpaceX returns to flight, nails rocket landing". CNN. Archived from the original on 28 January 2021. Retrieved 14 January 2017.
  89. ^ SpaceX (14 January 2017), Iridium-1 Hosted Webcast (at 37:30), archived from the original on 8 July 2020, retrieved 14 January 2017
  90. ^ "SpaceX Falcon 9 : Hispasat 30W-6 (1F) : March 6, 2018 - UPDATES". forum.nasaspaceflight.com. Archived from the original on 18 June 2022. Retrieved 18 June 2022.
  91. ^ "SpaceX Falcon 9 : Hispasat 30W-6 (1F) : March 6, 2018 - UPDATES". forum.nasaspaceflight.com. Archived from the original on 26 July 2022. Retrieved 18 June 2022.
  92. ^ SpaceX (5 March 2018). "Hispasat 30W-6". youtube.com. Archived from the original on 4 April 2018. Retrieved 3 April 2018.
  93. ^ "SpaceX rocket test-fired at Cape Canaveral for NASA telescope launch". 11 April 2018. Archived from the original on 20 May 2019. Retrieved 14 April 2018.
  94. ^ "Prelaunch Preview – SpaceX Demonstration Mission 1". Everyday Astronaut. 28 February 2019. Archived from the original on 23 December 2020. Retrieved 2 March 2019.
  95. ^ "SpaceX Falcon Heavy launches Arabsat-6A". 11 April 2019. Archived from the original on 12 April 2019. Retrieved 11 April 2019.
  96. ^ "SpaceX's Center Core Booster for Falcon Heavy Rocket Is Lost at Sea". Space.com. 15 April 2019. Archived from the original on 27 January 2021. Retrieved 16 April 2019.
  97. ^ Stephen Clark (23 April 2019). "SpaceX likely to move next rocket landing to drone ship". Spaceflight Now. Archived from the original on 5 April 2021. Retrieved 5 May 2019.
  98. ^ Ralph, Eric (3 May 2019). "SpaceX scrubs Cargo Dragon, Falcon 9 launch due to drone ship power issue". TESLARATI. Archived from the original on 20 January 2021. Retrieved 9 May 2019.
  99. ^ Clark, Stephen. "SpaceX's first 60 Starlink broadband satellites deployed in orbit – Spaceflight Now". Archived from the original on 2 April 2021. Retrieved 25 May 2019.
  100. ^ Ralph, Eric (26 June 2019). "SpaceX CEO Elon Musk explains why Falcon Heavy's center core missed the drone ship". TESLARATI. Archived from the original on 12 December 2020. Retrieved 26 June 2019.
  101. ^ @SpaceX (11 November 2019). "Falcon 9 first stage has landed on the of Course I Still Love You droneship – the fourth launch and landing of this booster" (Tweet). Archived from the original on 6 April 2021. Retrieved 11 November 2019 – via Twitter.
  102. ^ "Falcon 9 launches Dragon cargo spacecraft to ISS". 5 December 2019. Archived from the original on 1 August 2021. Retrieved 5 December 2019.
  103. ^ "SpaceX nails Falcon 9 landing as fairing halves begin journey back to Earth". 16 December 2019. Archived from the original on 26 October 2020. Retrieved 17 December 2019.
  104. ^ "SpaceX working on fix for Starlink satellites so they don't disrupt astronomy". 7 December 2019. Archived from the original on 2 January 2020. Retrieved 10 December 2019.
  105. ^ "SpaceX successfully launched its fourth batch of Starlink satellites into orbit and nailed a rocket landing following days of weather delays for the mission". Space.com. 29 January 2020. Archived from the original on 9 March 2021. Retrieved 29 January 2020.
  106. ^ "SpaceX successfully conducts fifth Starlink launch - booster misses drone ship". 17 February 2020. Archived from the original on 30 December 2020. Retrieved 20 February 2020.
  107. ^ @nextspaceflight (6 March 2020). "Hans: Last launch had a landing failure due to the winds that the booster encountered not being as predicted. Therefore, the booster decided to divert to a water landing to protect the droneship" (Tweet). Retrieved 28 February 2021 – via Twitter.
  108. ^ @SpaceX (15 March 2020). "Falcon 9 out of family data during engine power check" (Tweet). Archived from the original on 5 June 2020. Retrieved 24 April 2020 – via Twitter.
  109. ^ @elonmusk (22 April 2020). "Isopropyl alcohol trapped in sensor dead leg" (Tweet). Archived from the original on 28 August 2020. Retrieved 24 April 2020 – via Twitter.
  110. ^ "Starlink 6 | Falcon 9 Block 5 | Prelaunch Preview". Everyday Astronaut. 21 April 2020. Archived from the original on 23 April 2021. Retrieved 13 August 2020.
  111. ^ June 2020, Mike Wall 03 (3 June 2020). "SpaceX rocket returns to shore after historic astronaut launch (photos)". Space.com. Archived from the original on 8 March 2021. Retrieved 4 June 2020.{{cite web}}: CS1 maint: numeric names: authors list (link)
  112. ^ "SpaceX Launches Eighth Starlink Mission, Read The Instructions With East Coast Droneship Debut". NASASpaceFlight.com. 3 June 2020. Archived from the original on 9 December 2020. Retrieved 4 June 2020.
  113. ^ "SpaceX launches first Starlink rideshare mission with Planet Labs". NASASpaceFlight.com. 13 June 2020. Archived from the original on 22 April 2021. Retrieved 18 June 2020.
  114. ^ "SpaceX launches third GPS Block III satellite". NASASpaceFlight.com. 30 June 2020. Archived from the original on 24 March 2021. Retrieved 13 August 2020.
  115. ^ "SpaceX Launches ANASIS-II Military Communications Satellite for South Korea". NASASpaceFlight.com. 20 July 2020. Archived from the original on 22 April 2021. Retrieved 13 August 2020.
  116. ^ "SpaceX successfully conducts Starlink v1.0 L9 launch". NASASpaceFlight.com. 6 August 2020. Archived from the original on 21 April 2021. Retrieved 13 August 2020.
  117. ^ "SpaceX Breaks Record with Booster's Sixth Flight". NASASpaceFlight.com. 18 August 2020. Archived from the original on 10 November 2020. Retrieved 20 August 2020.
  118. ^ "SpaceX launches latest Starlink mission". NASASpaceFlight.com. 3 September 2020. Archived from the original on 15 September 2020. Retrieved 13 September 2020.
  119. ^ "SpaceX launches Starlink v1.0 Launch 12". NASASpaceFlight.com. 5 October 2020. Archived from the original on 4 October 2020. Retrieved 7 October 2020.
  120. ^ "SpaceX Starlink Mission L19 Launch". YouTube. 16 February 2021. Archived from the original on 16 February 2021. Retrieved 16 February 2021.
  121. ^ Media Briefing: Crew-3 Prelaunch News Conference, 9 November 2021, archived from the original on 10 November 2021, retrieved 10 November 2021, see the video at time 34:30
  122. ^ Clark, Stephen (7 June 2022). "Globalstar spare satellite to launch on SpaceX rocket this month". SpaceflightNow. Archived from the original on 7 June 2022. Retrieved 7 June 2022.
  123. ^ Jonathan McDowell [@planet4589] (20 June 2022). "Space-Track confirms the presence of four secret payloads on the Globalstar Falcon 9 launch - USA 328 to USA 331, catalog 52889 to 52892, orbital data not available. One piece of debris, probably a Starlink-style tension rod?" (Tweet) – via Twitter.
  124. ^ @cgbassa (21 June 2022). "SThe four classified satellites launched together with Globalstar FM15 on a Falcon 9 rocket yesterday have been detected in a ~535 km orbit at 53 deg inclination" (Tweet) – via Twitter.
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