STS-75: Difference between revisions
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{{short description|1996 American crewed spaceflight}} |
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{{Infobox spaceflight |
{{Infobox spaceflight |
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| name |
| name = STS-75 |
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| image |
| image = STS-75 Tethered Satellite System deployment.jpg |
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| image_caption |
| image_caption = Deployment of the Tethered Satellite System |
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| insignia |
| insignia = Sts-75-patch.png |
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| COSPAR_ID = 1996-012A |
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| SATCAT = 23801 |
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| orbits_completed = 252 |
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| orbits_completed = 252 |
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| launch_mass = |
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| payload_mass = {{convert|10592|kg}} |
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| crew_size = 7 |
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| apsis = gee |
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| orbit_epoch = |
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| orbit_regime = [[Low Earth orbit|Low Earth]] |
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| orbit_apoapsis = {{convert|320|km}} |
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| orbit_period = 90.5 minutes |
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| programme = [[Space Shuttle program]] |
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| orbit_periapsis = {{convert|277|km}} |
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| next_mission = [[STS-76]] (76) |
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| orbit_period = 90.5 minutes |
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| programme = [[Space Shuttle program]] |
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'''STS-75''' was a |
'''STS-75''' was a 1996 [[NASA]] [[Space Shuttle]] mission, the 19th mission of the [[Space Shuttle Columbia|''Columbia'']] orbiter. |
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==Crew== |
==Crew== |
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|agency7_up = [[Italian Space Agency|ASI]] |
|agency7_up = [[Italian Space Agency|ASI]] |
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Allen, Hoffman, Nicollier and Chang-Díaz had previously been members of the [[STS-46]] crew, which had flown the TSS-1 experiment in 1992. |
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==Mission objective== |
==Mission objective== |
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The primary objective of STS-75 was to carry the [[Tethered Satellite System]] Reflight (TSS-1R) into orbit and to deploy it spaceward on a conducting tether. The mission also flew the United States Microgravity Payload (USMP-3) designed to investigate materials science and condensed matter physics. |
The primary objective of STS-75 was to carry the [[Tethered Satellite System]] Reflight (TSS-1R) into orbit and to deploy it spaceward on a conducting tether. The mission also flew the United States Microgravity Payload (USMP-3) designed to investigate materials science and condensed matter physics. |
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[[File:STS-75 Tethered Satellite System deployment.jpg|thumb|left|Tethered Satellite System deployment]] |
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The TSS-1R mission was a reflight of TSS-1 which was flown onboard Space Shuttle ''Atlantis'' on [[STS-46]] in July/August 1992. The [[Tether satellite|Tether Satellite System]] circled the Earth at an altitude of 296 kilometers, placing the tether system within the rarefied electrically charged layer of the atmosphere known as the [[ionosphere]]. |
The TSS-1R mission was a reflight of TSS-1 which was flown onboard Space Shuttle ''Atlantis'' on [[STS-46]] in July/August 1992. The [[Tether satellite|Tether Satellite System]] circled the Earth at an altitude of 296 kilometers, placing the tether system within the rarefied electrically charged layer of the atmosphere known as the [[ionosphere]]. |
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STS-75 mission scientists hoped to deploy the tether to a distance of {{convert|20.7|km|mi|sp=us}}. Over {{convert|19|km|mi|sp=us}} of the tether were deployed (over a period of 5 hours) before the tether broke. Many pieces of floating debris were produced by the plasma discharge and rupture of the tether, and some collided with it.<ref name=Chobotov1999>{{Cite journal|last1=Chobotov|first1=V.A.|last2=Mains|first2=D.L.|date=April 1999 |title=Tether satellite system collision study|journal=Acta Astronautica|volume=44|issue=7–12|pages=543–551|doi=10.1016/s0094-5765(99)00098-3|bibcode=1999AcAau..44..543C|s2cid=109004311 |issn=0094-5765}}</ref><ref name=Stone2016>{{Cite journal|last=Stone|first=Nobie H|date=2016|title=Unique Results and Lessons Learned From the TSS Missions|url=https://ntrs.nasa.gov/search.jsp?R=20160007056|journal=5th International Conference on Tethers in Space|via=NTRS}}</ref><ref name=TSS-1R-FIB>{{Cite book|last=United States. National Aeronautics and Space Administration.|title=TSS-1R mission failure investigation board : final report.|date=1995|publisher=[National Aeronautics and Space Administration]|oclc=43059641}}</ref> The satellite remained in orbit for a number of weeks and was easily visible from the ground. |
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STS-75 mission scientists hoped to deploy the tether to a distance of {{convert|20.7|km|mi|sp=us}}. Over 19 kilometers of the tether were deployed before the tether broke. Little did the people of STS-75 know that the broken tether attracted company. Unidentified objects were seen and they shined lights while they were spotted. It remained in orbit for a number of weeks and was easily visible from the ground, appearing something like a small but surprisingly bright fluorescent light traveling through the sky. |
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[[Image:TSS-1R tether composition.png|thumb| |
[[Image:TSS-1R tether composition.png|thumb|left|alt=TSS-1R.|TSS-1R tether composition [NASA].]] |
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The electric conductor of the tether was a copper braid wound around a nylon (Nomex) string. It was encased in [[teflon]]-like insulation, with an outer cover of [[kevlar]], inside a nylon (Nomex) sheath. The culprit turned out to be the innermost core, made of a porous material which, during its manufacture, trapped many bubbles of air, at atmospheric pressure. |
The electric conductor of the tether was a copper braid wound around a nylon (Nomex) string. It was encased in [[teflon]]-like insulation, with an outer cover of [[kevlar]], inside a nylon (Nomex) sheath. The culprit turned out to be the innermost core, made of a porous material which, during its manufacture, trapped many bubbles of air, at atmospheric pressure.<ref name=Stone2016/> |
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Later vacuum-chamber experiments suggested that the unwinding of the reel uncovered pinholes in the insulation. That in itself would not have caused a major problem, because the ionosphere around the tether, under normal circumstance, was too rarefied to divert much of the current. However, the air trapped in the insulation changed that. As |
Later vacuum-chamber experiments suggested that the unwinding of the reel uncovered pinholes in the insulation. That in itself would not have caused a major problem, because the ionosphere around the tether, under normal circumstance, was too rarefied to divert much of the current. However, the air trapped in the insulation changed that. As air bubbled out of the pinholes, the high voltage of the nearby tether, about 3500 volts, converted it into a relatively dense plasma (similar to the ignition of a fluorescent tube), and therefore made the tether a much better conductor of electricity. This plasma diverted to the metal of the shuttle and from there to the ionospheric return circuit. That current was enough to melt the cable.<ref name=Stone2016/> |
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The specific |
The specific TSS-1R mission objectives were: characterize the current-voltage response of the TSS-orbiter system, characterize the satellite's high-voltage sheath structure and current collection process, demonstrate electric power generation, verify tether control laws and basic tether dynamics, demonstrate the effect of neutral gas on the plasma sheath and current collection, characterize the TSS radio frequency and plasma wave emissions and characterize the TSS dynamic-electrodynamic coupling.<ref name=Stone2016/> |
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TSS-1R Science Investigations included: TSS Deployer Core Equipment and Satellite Core Equipment (DCORE/SCORE), Research on Orbital Plasma Electrodynamics (ROPE), Research on Electrodynamic Tether Effects (RETE), Magnetic Field Experiment for TSS Missions (TEMAG), Shuttle Electrodynamic Tether System (SETS), Shuttle Potential and Return Electron Experiment (SPREE), Tether Optical Phenomena Experiment (TOP), Investigation of Electromagnetic Emissions by the Electrodynamic Tether (EMET), Observations at the Earth's Surface of Electromagnetic Emissions by TSS (OESSE), Investigation and Measurement of Dynamic Noise in the TSS (IMDN), Theoretical and Experimental Investigation of TSS Dynamics (TEID) and the Theory and Modeling in Support of Tethered Satellite Applications (TMST). |
TSS-1R Science Investigations included: TSS Deployer Core Equipment and Satellite Core Equipment (DCORE/SCORE), Research on Orbital Plasma Electrodynamics (ROPE), Research on Electrodynamic Tether Effects (RETE), Magnetic Field Experiment for TSS Missions (TEMAG), Shuttle Electrodynamic Tether System (SETS), Shuttle Potential and Return Electron Experiment (SPREE), Tether Optical Phenomena Experiment (TOP), Investigation of Electromagnetic Emissions by the Electrodynamic Tether (EMET), Observations at the Earth's Surface of Electromagnetic Emissions by TSS (OESSE), Investigation and Measurement of Dynamic Noise in the TSS (IMDN), Theoretical and Experimental Investigation of TSS Dynamics (TEID) and the Theory and Modeling in Support of Tethered Satellite Applications (TMST). |
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===Other mission objectives=== |
===Other mission objectives=== |
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The USMP-3 payload consisted of four major experiments mounted on two Mission Peculiar Experiment Support Structures (MPESS) and three Shuttle Mid-deck experiments. The experiments were: Advanced Automated Directional Solidification Furnace (AADSF), Material pour l'Etude des Phenomenes Interessant la Solidification sur Terre et en Orbite (MEPHISTO), Space Acceleration Measurement System (SAMS), Orbital Acceleration Research Experiment (OARE), Critical Fluid Light Scattering Experiment (ZENO) and Isothermal Dendritic Growth Experiment (IDGE). |
The USMP-3 payload consisted of four major experiments mounted on two Mission Peculiar Experiment Support Structures (MPESS) and three Shuttle Mid-deck experiments. The experiments were: Advanced Automated Directional Solidification Furnace (AADSF), Material pour l'Etude des Phenomenes Interessant la Solidification sur Terre et en Orbite (MEPHISTO), Space Acceleration Measurement System (SAMS), Orbital Acceleration Research Experiment (OARE), Critical Fluid Light Scattering Experiment (ZENO) and Isothermal Dendritic Growth Experiment (IDGE). |
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==Alternating use of bunk bed== |
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Astronauts Jeffrey A. Hoffman and Scott J. Horowitz, both Jewish, had alternating use of the same bunk bed, to which Hoffman attached, upon Horowitz's request, a [[mezuzah]], using Velcro.<ref>{{cite magazine |
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|magazine=[[Community Magazine (Brooklyn)]] |
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|title=Practicing Judaism in space - Jewish astronauts reflect upon their time in outer space |
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|url=http://www.communitym.com/article.asp?article_id=104383&article_type=0 |
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|author=Dave Gordon}}</ref> |
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==Operating system== |
==Operating system== |
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STS-75 also was the first use of an operating system based on the [[Linux kernel]] on orbit. An older Digital [[Unix]] program, originally on a [[AlphaServer|DEC AlphaServer]], was ported to run [[Linux]] on a laptop. The next use of Linux was a year later, on [[STS-83]].<ref>{{Cite news |url=http://www.amsat.org/amsat/ftp/news/1997/spc0317.txt |work=SpaceNews |date= |
STS-75 also was the first use of an operating system based on the [[Linux kernel]] on orbit. An older Digital [[Unix]] program, originally on a [[AlphaServer|DEC AlphaServer]], was ported to run [[Linux]] on a laptop. The next use of Linux was a year later, on [[STS-83]].<ref>{{Cite news |url=http://www.amsat.org/amsat/ftp/news/1997/spc0317.txt |work=SpaceNews |date=17 March 1997 |title=LINUX TO FLY ON STS-83 |url-status=dead |archive-url=https://web.archive.org/web/20051210063223/http://www.amsat.org/amsat/ftp/news/1997/spc0317.txt |archive-date=10 December 2005}}</ref> |
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==Fictional STS-75 mission== |
==Fictional STS-75 mission== |
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STS-75 was the shuttle mission described in the fictional NASA [[Document 12-571-3570]], although this document was disseminated several years before STS-75 was launched. The document purports to report on experiments to determine effective [[sex in space|sexual positions in microgravity]]. Astronomer and scientific writer Pierre Kohler mistook this document for fact and is responsible for a major increase in its redistribution in the early 21st century. Conspiracy theories first made in the early beginnings of the Shuttle era of sex in space were suddenly made rampant again, causing a minor press debacle among [[Tabloid journalism|tabloids]]. |
STS-75 was the shuttle mission described in the fictional NASA [[Document 12-571-3570]], although this document was disseminated several years before STS-75 was launched. The document purports to report on experiments to determine effective [[sex in space|sexual positions in microgravity]]. Astronomer and scientific writer Pierre Kohler mistook this document for fact and is responsible for a major increase in its redistribution in the early 21st century. Conspiracy theories first made in the early beginnings of the Shuttle era of sex in space were suddenly made rampant again, causing a minor press debacle among [[Tabloid journalism|tabloids]].<ref>{{cite book |last1=Roach |first1=Mary |title=Packing For Mars |date=2011 |publisher=W. W. Norton & Company |isbn=9780393339918 |pages=235–236 |url=https://books.google.com/books?id=At4oZYabls4C&pg=PA235 |access-date=2021-05-07 |archive-date=2017-02-25 |archive-url=https://web.archive.org/web/20170225140703/https://books.google.com/books?id=At4oZYabls4C&pg=PA235 |url-status=live }}</ref> |
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==References== |
==References== |
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{{Include-NASA}} |
{{Include-NASA}} |
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*{{cite web|url=//www-spof.gsfc.nasa.gov/Education/wtether.html|title="The Exploration of the Earth's Magnetosphere": The Space Tether Experiment|first1=David |first2=Mauricio|last1=P. Stern |last2=Peredo |publisher=NASA}} |
*{{cite web|url=//www-spof.gsfc.nasa.gov/Education/wtether.html|title="The Exploration of the Earth's Magnetosphere": The Space Tether Experiment|first1=David |first2=Mauricio|last1=P. Stern |last2=Peredo |publisher=NASA}} |
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==External links== |
==External links== |
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{{Portal|Spaceflight}} |
{{Portal|Spaceflight}} |
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* {{Commons category-inline|STS-75}} |
* {{Commons category-inline|STS-75}} |
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* [http://science.ksc.nasa.gov/shuttle/missions/sts-75/mission-sts-75.html NASA mission summary] |
* [http://science.ksc.nasa.gov/shuttle/missions/sts-75/mission-sts-75.html NASA mission summary] {{Webarchive|url=https://web.archive.org/web/20070602150551/http://science.ksc.nasa.gov/shuttle/missions/sts-75/mission-sts-75.html |date=2 June 2007 }} |
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* [http://www.nss.org/resources/library/shuttlevideos/shuttle75.htm STS-75 Video Highlights] |
* [http://www.nss.org/resources/library/shuttlevideos/shuttle75.htm STS-75 Video Highlights] {{Webarchive|url=https://web.archive.org/web/20131110165526/http://www.nss.org/resources/library/shuttlevideos/shuttle75.htm |date=10 November 2013 }} |
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* {{cite web |url=//www.americaspace.com/?p=52784 |last=Evans |first=Ben |title='The Tether Is Broken': The Second Flight of the Tethered Satellite (Part 2) |date= |
* {{cite web |url=//www.americaspace.com/?p=52784 |last=Evans |first=Ben |title='The Tether Is Broken': The Second Flight of the Tethered Satellite (Part 2) |date=23 February 2014 |publisher=AmericaSpace |url-status=dead |archive-url=https://web.archive.org/web/20150922202334/http://www.americaspace.com/?p=52784 |archive-date=22 September 2015}} |
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{{Space Shuttle Columbia}} |
{{Space Shuttle Columbia}} |
Latest revision as of 15:58, 1 March 2023
Mission type | Microgravity research Technology development |
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Operator | NASA |
COSPAR ID | 1996-012A |
SATCAT no. | 23801 |
Mission duration | 15 days, 17 hours, 40 minutes, 22 seconds |
Distance travelled | 10,500,000 kilometres (6,500,000 mi) |
Orbits completed | 252 |
Spacecraft properties | |
Spacecraft | Space Shuttle Columbia |
Payload mass | 10,592 kilograms (23,351 lb) |
Crew | |
Crew size | 7 |
Members | |
Start of mission | |
Launch date | 22 February 1996, 20:18:00 | UTC
Launch site | Kennedy LC-39B |
End of mission | |
Landing date | 9 March 1996, 13:58:22 | UTC
Landing site | Kennedy SLF Runway 33 |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
Perigee altitude | 277 kilometres (172 mi) |
Apogee altitude | 320 kilometres (200 mi) |
Inclination | 28.45 degrees |
Period | 90.5 minutes |
Left to right - Seated: Horowitz, Allen, Chang-Diaz; Standing: Cheli, Guidoni, Hoffman, Nicollier |
STS-75 was a 1996 NASA Space Shuttle mission, the 19th mission of the Columbia orbiter.
Crew[edit]
Position | Astronaut | |
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Commander | Andrew M. Allen Third and last spaceflight | |
Pilot | Scott J. Horowitz First spaceflight | |
Mission Specialist 1 | Jeffrey A. Hoffman Fifth and last spaceflight | |
Mission Specialist 2 | Maurizio Cheli, ESA Only spaceflight | |
Mission Specialist 3 | Claude Nicollier, ESA Third spaceflight | |
Mission Specialist 4 | / Franklin R. Chang-Diaz Fifth spaceflight Payload Commander | |
Payload Specialist | Umberto Guidoni, ASI First spaceflight |
Allen, Hoffman, Nicollier and Chang-Díaz had previously been members of the STS-46 crew, which had flown the TSS-1 experiment in 1992.
Mission objective[edit]
Tethered Satellite System[edit]
The primary objective of STS-75 was to carry the Tethered Satellite System Reflight (TSS-1R) into orbit and to deploy it spaceward on a conducting tether. The mission also flew the United States Microgravity Payload (USMP-3) designed to investigate materials science and condensed matter physics.
The TSS-1R mission was a reflight of TSS-1 which was flown onboard Space Shuttle Atlantis on STS-46 in July/August 1992. The Tether Satellite System circled the Earth at an altitude of 296 kilometers, placing the tether system within the rarefied electrically charged layer of the atmosphere known as the ionosphere.
STS-75 mission scientists hoped to deploy the tether to a distance of 20.7 kilometers (12.9 mi). Over 19 kilometers (12 mi) of the tether were deployed (over a period of 5 hours) before the tether broke. Many pieces of floating debris were produced by the plasma discharge and rupture of the tether, and some collided with it.[1][2][3] The satellite remained in orbit for a number of weeks and was easily visible from the ground.
The electric conductor of the tether was a copper braid wound around a nylon (Nomex) string. It was encased in teflon-like insulation, with an outer cover of kevlar, inside a nylon (Nomex) sheath. The culprit turned out to be the innermost core, made of a porous material which, during its manufacture, trapped many bubbles of air, at atmospheric pressure.[2]
Later vacuum-chamber experiments suggested that the unwinding of the reel uncovered pinholes in the insulation. That in itself would not have caused a major problem, because the ionosphere around the tether, under normal circumstance, was too rarefied to divert much of the current. However, the air trapped in the insulation changed that. As air bubbled out of the pinholes, the high voltage of the nearby tether, about 3500 volts, converted it into a relatively dense plasma (similar to the ignition of a fluorescent tube), and therefore made the tether a much better conductor of electricity. This plasma diverted to the metal of the shuttle and from there to the ionospheric return circuit. That current was enough to melt the cable.[2]
The specific TSS-1R mission objectives were: characterize the current-voltage response of the TSS-orbiter system, characterize the satellite's high-voltage sheath structure and current collection process, demonstrate electric power generation, verify tether control laws and basic tether dynamics, demonstrate the effect of neutral gas on the plasma sheath and current collection, characterize the TSS radio frequency and plasma wave emissions and characterize the TSS dynamic-electrodynamic coupling.[2]
TSS-1R Science Investigations included: TSS Deployer Core Equipment and Satellite Core Equipment (DCORE/SCORE), Research on Orbital Plasma Electrodynamics (ROPE), Research on Electrodynamic Tether Effects (RETE), Magnetic Field Experiment for TSS Missions (TEMAG), Shuttle Electrodynamic Tether System (SETS), Shuttle Potential and Return Electron Experiment (SPREE), Tether Optical Phenomena Experiment (TOP), Investigation of Electromagnetic Emissions by the Electrodynamic Tether (EMET), Observations at the Earth's Surface of Electromagnetic Emissions by TSS (OESSE), Investigation and Measurement of Dynamic Noise in the TSS (IMDN), Theoretical and Experimental Investigation of TSS Dynamics (TEID) and the Theory and Modeling in Support of Tethered Satellite Applications (TMST).
Other mission objectives[edit]
The USMP-3 payload consisted of four major experiments mounted on two Mission Peculiar Experiment Support Structures (MPESS) and three Shuttle Mid-deck experiments. The experiments were: Advanced Automated Directional Solidification Furnace (AADSF), Material pour l'Etude des Phenomenes Interessant la Solidification sur Terre et en Orbite (MEPHISTO), Space Acceleration Measurement System (SAMS), Orbital Acceleration Research Experiment (OARE), Critical Fluid Light Scattering Experiment (ZENO) and Isothermal Dendritic Growth Experiment (IDGE).
Alternating use of bunk bed[edit]
Astronauts Jeffrey A. Hoffman and Scott J. Horowitz, both Jewish, had alternating use of the same bunk bed, to which Hoffman attached, upon Horowitz's request, a mezuzah, using Velcro.[4]
Operating system[edit]
STS-75 also was the first use of an operating system based on the Linux kernel on orbit. An older Digital Unix program, originally on a DEC AlphaServer, was ported to run Linux on a laptop. The next use of Linux was a year later, on STS-83.[5]
Fictional STS-75 mission[edit]
STS-75 was the shuttle mission described in the fictional NASA Document 12-571-3570, although this document was disseminated several years before STS-75 was launched. The document purports to report on experiments to determine effective sexual positions in microgravity. Astronomer and scientific writer Pierre Kohler mistook this document for fact and is responsible for a major increase in its redistribution in the early 21st century. Conspiracy theories first made in the early beginnings of the Shuttle era of sex in space were suddenly made rampant again, causing a minor press debacle among tabloids.[6]
References[edit]
- ^ Chobotov, V.A.; Mains, D.L. (April 1999). "Tether satellite system collision study". Acta Astronautica. 44 (7–12): 543–551. Bibcode:1999AcAau..44..543C. doi:10.1016/s0094-5765(99)00098-3. ISSN 0094-5765. S2CID 109004311.
- ^ a b c d Stone, Nobie H (2016). "Unique Results and Lessons Learned From the TSS Missions". 5th International Conference on Tethers in Space – via NTRS.
- ^ United States. National Aeronautics and Space Administration. (1995). TSS-1R mission failure investigation board : final report. [National Aeronautics and Space Administration]. OCLC 43059641.
- ^ Dave Gordon. "Practicing Judaism in space - Jewish astronauts reflect upon their time in outer space". Community Magazine (Brooklyn).
- ^ "LINUX TO FLY ON STS-83". SpaceNews. 17 March 1997. Archived from the original on 10 December 2005.
- ^ Roach, Mary (2011). Packing For Mars. W. W. Norton & Company. pp. 235–236. ISBN 9780393339918. Archived from the original on 25 February 2017. Retrieved 7 May 2021.
This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.
- P. Stern, David; Peredo, Mauricio. ""The Exploration of the Earth's Magnetosphere": The Space Tether Experiment". NASA.
External links[edit]
- Media related to STS-75 at Wikimedia Commons
- NASA mission summary Archived 2 June 2007 at the Wayback Machine
- STS-75 Video Highlights Archived 10 November 2013 at the Wayback Machine
- Evans, Ben (23 February 2014). "'The Tether Is Broken': The Second Flight of the Tethered Satellite (Part 2)". AmericaSpace. Archived from the original on 22 September 2015.