Ein bißchen verspätet, aber immerhin. Das JWST, James Webb Space Telescope, hat jetzt einen offiziellen Starttermin, per Ariane 5 von Kourou.
Zitat von Forbes.com, May 11, 2021Dreamed-up 30 years ago and frequently delayed, JWST—or “Webb”—now has a launch date of Sunday, October 31, 2021—after many delays. It was supposed to launch on March 31, 2021 until the COVID-19 pandemic interrupted preparations.
Once “the next Hubble” is in space it will unfurl and resemble a giant sunflower. The next hurdle for engineers is to perform the final folding of the “golden mirror” and sunshield so that it fits neatly inside the fairing of an Arianespace Ariane 5 rocket.
Wobei es sich hier um einen Terminus post quem handelt.
Zitat von Space News.com, May 12Ongoing work to address a problem seen on two previous Ariane 5 launches has kept that launch vehicle grounded for months and could delay the high-profile launch of NASA’s James Webb Space Telescope later this year.
The Ariane 5, one of the world’s most reliable launch vehicles, last launched in August 2020, placing two communications satellites and Northrop Grumman’s Mission Extension Vehicle 2 into geostationary transfer orbit. The long hiatus in launches led to speculation there was an issue with the rocket.
In a statement to SpaceNews, Arianespace acknowledged that “post-flight analyses conducted on two recent Ariane 5 launches have indicated the occurrence of a less than fully nominal separation of the fairing, however with no adverse impact on the Ariane 5 flights in question.”
However, NASA officials said there are two Ariane 5 launches scheduled before the JWST launch, which the agency had been publicizing an Oct. 31 date for.
The first of those two Ariane 5 missions is scheduled to carry the Eutelsat Quantum and Star One D2 satellites for operators Eutelsat and Embratel Star One, respectively. In its latest earnings statement May 11, Eutelsat said the launch of Eutelsat Quantum has slipped from the late second quarter of this year to the third quarter, but did not offer a more specific launch date.
At a May 11 media event about JWST, Greg Robinson, program director for the telescope at NASA Headquarters, confirmed there were two Ariane 5 launches ahead of JWST. “They’re going through the process of getting the rocket ready for the upcoming launch, the first of three,” he said. “Once they launch, we’ll be able to launch in about four months after that.”
That would suggest JWST will miss its Oct. 31 launch date, although perhaps only by weeks. An Ariane 5 launch of Eutelsat Quantum and Star One D2 at the beginning of the third quarter, or early July, would allow for a launch of JWST in early November, four months later.
Zitat Jeff Foust @jeff_foust Arianespace’s Beatriz Romero said later in the briefing that the official launch date remains no earlier than Oct. 31, but that the launch period runs through early December. 3:41 nachm. · 1. Juni 2021·Tweetbot for Mac
Hier gibt's, ziemlich bunt & graphisch eher schlicht, das "Media Kit", aus dem die Medien ihre Informationen zum JWST schöpfen können, inkl. Zeitplan & Hauptspiegel-Entfaltungssequenz (s.10):
LAUNCH TIMELINE AT EUROPE’S SPACEPORT
Zitat - 55 days: Webb arriving at Pariacabo harbour - 29 days: Main stage positioned on launch table - 7 days: Webb placed on Ariane 5 - 6 days: Webb encapsuled in the fairing - 1 day: Ariane 5 rolls out to the pad
Nicht zum James Webb Space Telescope, sondern zu dessen aktuellem Vorläufer, der zurzeit nicht einsatzfähig ist.
Zitat NASA Says Hubble Space Telescope Down For Past Few Days
NASA said the problem is a payload computer that stopped working last Sunday. It also insisted that Hubble telescope itself is in "in good health."
World Agence France-Presse - Updated: June 19, 2021 4:58 a.m. IST
Washington: The Hubble Space Telescope, which has been peering into the universe for more than 30 years, has been down for the past few days, National Aeronautics and Space Administration (NASA) said Friday. The problem is a payload computer that stopped working last Sunday, the US space agency said. It insisted the telescope itself and scientific instruments that accompany it are "in good health."
"The payload computer's purpose is to control and coordinate the science instruments and monitor them for health and safety purposes," NASA said. An attempt to restart it on Monday failed. NASA said initial evidence pointed to a degrading computer memory module as the source of the computer problem. An attempt to switch to a back-up memory module also failed. The technology for the payload computer dates back to the 1980s, and it was replaced during maintenance work in 2009.
Zitat von 21 Jun 2021, 11:30 a.m.The payload computer is meant to send a "keep-alive" signal to the main spacecraft computer, but that's not happening since the failure so the main computer triggered the automatic safety measure of placing all science instruments into a safe mode configuration. They will remain in that mode until NASA figures out a way to fix the payload computer.
An investigation suggested the computer ceased to function due to a degrading memory module. As you'd expect, NASA has three backup memory modules it can switch between if necessary, but the command to initiate a backup module also failed. A further attempt on both the original and backup module failed again on Thursday evening, suggesting there's another fault yet to be discovered. On Friday, NASA's operations team started running more tests to collect more detailed information to help pinpoint the cause of the failure. That testing is ongoing with no further updates issued since then.
There is a second computer which can be switched over to, but it depends on the same four independent memory modules. NASA says the 31-year-old telescope and all the science instruments remain in good health, but unless the payload computer can be brought back into operation they won't be able to collect and send back anymore valuable data.
Zitat Operations Underway to Restore Payload Computer on NASA's Hubble Space Telescope
June 30, 2021 - NASA Preparing for Procedures to Turn On Backup Hardware on the Hubble Space Telescope
NASA is taking additional steps to investigate the Hubble Space Telescope’s payload computer issue that began on June 13, suspending science observations. In parallel with the investigation, NASA is preparing and testing procedures to turn on backup hardware onboard the spacecraft. The telescope itself and science instruments remain healthy and in a safe configuration.
The source of the computer problem lies in the Science Instrument Command and Data Handling (SI C&DH) unit, where the payload computer resides. A few hardware pieces on the SI C&DH could be the culprit(s).
The team is currently scrutinizing the Command Unit/Science Data Formatter (CU/SDF), which sends and formats commands and data. They are also looking at a power regulator within the Power Control Unit, which is designed to ensure a steady voltage supply to the payload computer’s hardware. If one of these systems is determined to be the likely cause, the team must complete a more complicated operations procedure to switch to the backup units. This procedure would be more complex and riskier than those the team executed last week, which involved switching to the backup payload computer hardware and memory modules. To switch to the backup CU/SDF or power regulator, several other hardware boxes on the spacecraft must also be switched due to the way they are connected to the SI C&DH unit.
Over the next week or so, the team will review and update all of the operations procedures, commands and other related items necessary to perform the switch to backup hardware. They will then test their execution against a high-fidelity simulator.
The team performed a similar switch in 2008, which allowed Hubble to continue normal science operations after a CU/SDF module failed. A servicing mission in 2009 then replaced the entire SI C&DH unit, including the faulty CU/SDF module, with the SI C&DH unit currently in use.
The James Webb Space Telescope is one step closer to launch after a review of its Ariane launch vehicle, while NASA continues a separate review of the name of the spacecraft itself.
The European Space Agency announced July 1 that it, along with Arianespace, had successfully completed the final mission analysis review for the launch of JWST on an Ariane 5. “All technical evaluations performed by Arianespace on the mission’s key aspects, including the launch trajectory and payload separation, have shown positive results,” ESA said in a statement.
Problems with the payload fairing separation system on two Ariane 5 launches last year have effectively grounded the rocket since its last launch in August 2020. Arianespace announced July 1, after a Soyuz launch of OneWeb satellites, that the next Ariane 5 launch is scheduled for July 27.
That upcoming launch, of two commercial satellites, is the first of two Ariane 5 missions before the launch of JWST. While both NASA and ESA are maintaining a formal “launch readiness date” of Oct. 31 for JWST, the schedule of upcoming launches suggests JWST will launch no earlier than the second half of November.
Zitat Jul 8, 2021 Operations Underway to Restore Payload Computer on NASA's Hubble Space Telescope
July 08, 2021 - Successful Completion of Multi-Day Test
NASA successfully completed a test of procedures that would be used to switch to backup hardware on Hubble in response to the payload computer problem. This switch could occur next week after further preparations and reviews.
July 06, 2021 - Multi-Day Test of Procedures Began Today on Hubble
A multi-day test of procedures that would be used to turn on backup hardware on the Hubble Space Telescope began today. Meanwhile, NASA continues to investigate the cause of the payload computer issue that began on June 13.
NASA completed a review to assess and minimize risks related to Hubble’s possible switch to backup hardware. Investigation into the cause of the payload computer issue is ongoing. Operations Underway to Restore Payload Computer on NASA's Hubble
Zitat NASA is working to resolve an issue with the payload computer on the Hubble Space Telescope. nasa.gov
Zitat Hubble @NASAHubble NASA has identified the possible cause of the problem with the payload computer that suspended science operations on June 13 and has approved plans to switch to backup hardware. These activities will begin tomorrow, July 15.
Zitat For more information: Operations Underway to Restore Payload Computer on NASA's Hubble NASA is working to resolve an issue with the payload computer on the Hubble Space Telescope. nasa.gov
Ich bitte die Regie, mal die "Zarathustra"-Fanfare einzuspielen.
Zitat The Hubble Space Telescope, seen here during its initial deployment in 1990 by the space shuttle Discovery, appears to have been fixed again after another near-death experience. NASA:
‘Hubble is back!’ Famed space telescope has new lease on life after computer swap appears to fix glitch
By Daniel CleryJul. 16, 2021 , 8:00 AM
The iconic but elderly Hubble Space Telescope appears to have been resurrected again after a shutdown of more than a month following a computer glitch. Science has learned that following a switch from the operating payload control computer to a backup device over the past 24 hours, Hubble’s operators have re-established communications with all the telescope’s instruments and plan to return them to normal operations today.
“Hubble is back!” Tom Brown, head of the Hubble mission office, emailed to staff at the Space Telescope Science Institute at 5:56 a.m. “I am excited to watch Hubble get back to exploring the universe.”
Zitat Hubble @NASAHubble All instruments on the Hubble Space Telescope are now in operational status, and science data is once again being collected to further our understanding of the universe. Operations Underway to Restore Payload Computer on NASA's Hubble
Manchmal ärgert es den kleinen Zyniker, daß ihm das Offensichtliche nicht vorher eingefallen ist.
Zitat von NEWS 23 July 2021NASA investigates renaming James Webb telescope after anti-LGBT+ claims
Some astronomers argue the flagship observatory — successor to the Hubble Space Telescope — will memorialize discrimination.
NASA is considering whether to rename its flagship astronomical observatory, given reports alleging that James Webb, after whom it is named, was involved in persecuting gay and lesbian people during his career in government. Keeping his name on the US$8.8-billion James Webb Space Telescope (JWST) — set to launch later this year — would glorify bigotry and anti-LGBT+ sentiment, say some astronomers. But others say there is not yet enough evidence against Webb, who was head of NASA from 1961 to 1968, and they are withholding judgement until the agency has finished an internal investigation.
Zitat Published: 15:02 BST, 8 September 2021 | Updated: 15:34 BST, 8 September 2021
The countdown is on! NASA finally announces the launch date for its highly-anticipated James Webb space telescope, with a targeted date of December 18
The $10 billion (£7.2 billion) James Webb telescope is a successor to Hubble It will launch from the ESA spaceport in French Guiana on December 18, 2021 This follows months of delays, with the original launch date set for October
It will take off from Europe's Spaceport in French Guiana atop the Ariane 5 flight VA256, which will be the third flight of the Arianespace rocket of the year.
"Les hommes seront toujours fous; et ceux qui croient les guérir sont les plus fous de la bande." - Voltaire
Zitat After two decades, the Webb telescope is finished and on the way to its launch site
September 30, 2021
A ship carrying the $10 billion James Webb Space Telescope left a port in Southern California last weekend to begin a nearly two-week journey to Kourou, French Guiana, where it will begin final preparations for launch Dec. 18 on a European Ariane 5 rocket.
“The James Webb Space Telescope is finished,” said Paul Hertz, head of NASA’s astrophysics division, in a presentation to the Astronomy and Astrophysics Advisory Committee earlier this week. “We’ve stopped working on it. It’s on the way to the launch pad for a launch on Dec. 18.”
Eric Smith, NASA’s program scientist for the Webb telescope, confirmed Wednesday the observatory has departed the United States after completing final testing at a Northrop Grumman facility in Redondo Beach, California.
“We are in transit to Kourou, having left the continental United States now,” Smith said in the advisory committee meeting.
NASA is keeping specific schedule details about the observatory’s journey under wraps for security reasons. The vessel carrying the Webb telescope will traverse the Panama Canal to cross from the Pacific Ocean to the Caribbean Sea, then complete the voyage to Kourou, French Guiana.
Smith said mission managers have 13 days of schedule margin to have Webb ready for launch Dec. 18. Liftoff is scheduled in the mid-morning, local time, in French Guiana.
Zitat After more than two decades of delays and ballooning development costs, NASA’s next-generation space observatory, the James Webb Space Telescope, has arrived in French Guiana, South America. ... The James Webb Space Telescope, or JWST, spent 16 days at sea, packed inside an environmentally controlled, custom-built shipping container aboard a French cargo ship. ... Originally proposed in 1996, JWST was supposed to launch as early as 2007 for a cost of $1 billion. But the project’s timeline has been delayed numerous times, as the budget of the mission has increased to $9.7 billion. On September 8th, NASA set a target launch date for December 18th, 2021, 14 years later than originally planned.
Zitat The James Webb Space Telescope, a once in a generation space mission, arrived safely at Pariacabo harbour in French Guiana on 12 October 2021, ahead of its launch on an Ariane 5 rocket from Europe's Spaceport. The shallow Kourou river was specially dredged to ensure a clear passage and the vessel followed high tide to safely reach port.
The MN Colibri, like its sister vessel the MN Toucan, were built to ship Ariane 5 rocket parts from Europe to French Guiana. They were specifically designed to carry a complete set of Ariane 5 parts across the Atlantic, while having a low enough draft to enable them to follow a route along the shallow Kourou river to the Pariacabo harbour.
Mark your calendars, space fans. @NASA_SLS is targeting a Feb. 12, 2022 launch at 5:56 pm ET for the Orion Artemis 1 mission around the moon. There's a 21-minute launch window.
Zitat Tariq J. Malik-cula Bat @tariqjmalik · 40m Replying to @tariqjmalik
And big caveat, Orion and the SLS stack still need to rollout to the launch pad by the end of 2021, ace a January fueling test and other checks top meet that date.
"Les hommes seront toujours fous; et ceux qui croient les guérir sont les plus fous de la bande." - Voltaire
Zitat Ariane 5 fairing cleared for Webb launch after “perfect” performance on last flight
The payload fairing on the most recent Ariane 5 launch last month worked perfectly, according to the European Space Agency, helping clear concerns about the shroud before liftoff of the James Webb Space Telescope on the next Ariane 5 flight in December.
NASA, ESA, and Arianespace managers discussed the Ariane 5 fairing data and other mission details during a flight readiness review Oct. 28. The readiness review cleared the way for the start of the Ariane 5 launch campaign at the Guiana Space Center, a European-run spaceport on the northern coast of South America.
Teams at the spaceport raised the Ariane 5 rocket’s core stage onto a mobile launch platform Saturday inside the launcher integration building. Two powerful solid rocket boosters, already packed with their powder propellant, are set to be installed on each side of the core stage in the next few days.
Once the rocket’s upper stage and avionics bay are stacked, Arianespace will transfer the Ariane 5 to a nearby final assembly building, where the 35-foot-tall (10.66-meter) Webb observatory will be hoisted on top of the launcher. The final piece to be added will the payload fairing to surround Webb.
The Ariane 5 will roll to the launch pad Dec. 16 in preparation for liftoff at 7:20 a.m. EST (1220 GMT; 9:20 a.m. French Guiana time) on Dec. 18.
Verschiebung des Starttermins um 4 Tage auf den 22. Dezember.
Zitat von November 21, 2021NASA Provides Update on Webb Telescope Launch
The launch readiness date for the James Webb Space Telescope is moving to no earlier than Dec. 22 to allow for additional testing of the observatory, following a recent incident that occurred during Webb’s launch preparations.
The incident occurred during operations at the satellite preparation facility in Kourou, French Guiana, performed under Arianespace overall responsibility. Technicians were preparing to attach Webb to the launch vehicle adapter, which is used to integrate the observatory with the upper stage of the Ariane 5 rocket. A sudden, unplanned release of a clamp band – which secures Webb to the launch vehicle adapter – caused a vibration throughout the observatory.
A NASA-led anomaly review board was immediately convened to investigate and instituted additional testing to determine with certainty the incident did not damage any components. NASA and its mission partners will provide an update when the testing is completed at the end of this week.
Webb was previously scheduled to launch Dec. 18 on an Arianespace Ariane 5 rocket from Kourou.
Das fühlt sich allmählich an wie "wir warten aufs Christkind" für Sternfreunde.
Andererseits sollten sie 100x sichergehen, daß sich da nichts verklemmt und am Ende nicht enfaltet, wenn das Teleskop auf seinem Weg zum Lagrange-Punkt 2 in 1,5 Millionen km Entfernung unterwegs ist.
"Les hommes seront toujours fous; et ceux qui croient les guérir sont les plus fous de la bande." - Voltaire
Zitat Nov. 22, 2021 — NASA Closer to Full Hubble Operations as Another Instrument Resumes Science
NASA continues bringing the Hubble Space Telescope back to normal science operations, most recently recovering the Wide Field Camera 3 instrument Sunday, Nov. 21. This camera will be the second of Hubble’s instruments, after the Advanced Camera for Surveys, to resume science after suspending the spacecraft’s observations Oct. 25. The Wide Field Camera 3's first science observation since the anomaly will be Nov. 23.
The team chose to restore the most heavily used Hubble instrument, the Wide Field Camera 3, which represents more than a third of the spacecraft’s observing time. Engineers also began preparing changes to the instrument parameters, while testing the changes on ground simulators. These changes would allow the instruments to handle several missed synchronization messages while continuing to operate normally if they occur in the future. These changes will first be applied to another instrument, the Cosmic Origins Spectrograph, to further protect its sensitive far-ultraviolet detector. It will take the team several weeks to complete the testing and upload the changes to the spacecraft.
Although the team has identified no further message losses since monitoring began Nov. 1, NASA is taking extra steps to keep the hardware safe in case the issue reoccurs. Investigation continues into the cause of the missed messages. The remaining Hubble instruments are still in safe mode and the rest of the spacecraft continues to operate as expected.
Nov. 29, 2021 - NASA Takes Another Step Toward Full Hubble Ops: Spectrograph Return
NASA continues bringing the Hubble Space Telescope back to normal science operations, most recently recovering the Wide Field Camera 3 instrument Sunday, Nov. 21. This camera will be the second of Hubble’s instruments, after the Advanced Camera for Surveys, to resume science after suspending the spacecraft’s observations Oct. 25. The Wide Field Camera 3's first science observation since the anomaly will be Nov. 23.
The team chose to restore the most heavily used Hubble instrument, the Wide Field Camera 3, which represents more than a third of the spacecraft’s observing time. Engineers also began preparing changes to the instrument parameters, while testing the changes on ground simulators. These changes would allow the instruments to handle several missed synchronization messages while continuing to operate normally if they occur in the future. These changes will first be applied to another instrument, the Cosmic Origins Spectrograph, to further protect its sensitive far-ultraviolet detector. It will take the team several weeks to complete the testing and upload the changes to the spacecraft.
Although the team has identified no further message losses since monitoring began Nov. 1, NASA is taking extra steps to keep the hardware safe in case the issue reoccurs. Investigation continues into the cause of the missed messages. The remaining Hubble instruments are still in safe mode and the rest of the spacecraft continues to operate as expected.
The Hubble Space Telescope team recovered the Cosmic Origins Spectrograph instrument on Sunday, Nov. 28, moving the telescope further toward full science operations. Three of Hubble’s four active instruments are now collecting science data once again.
The team also continued work on developing and testing changes to instrument software that would allow them to conduct science operations even if they encounter several lost synchronization messages in the future. Those changes would first be installed on the Cosmic Origins Spectrograph once they’re completed and tested within a few weeks. Hubble’s other instruments would also receive similar changes. The team has not detected further synchronization message issues since monitoring began Nov. 1.
Zitat NASA gives green light to fuel James Webb Space Telescope
NASA engineers have cleared teams at the Guiana Space Center in South America to begin loading 63 gallons of fuel and oxidizer into the James Webb Space Telescope, after extra testing showed the observatory suffered no damage during a processing incident in the clean room earlier this month.
During a “consent to fuel” review held Wednesday, Nov. 24, mission managers gave approval to begin the propellant loading process at the French Guiana spaceport the following day.
“Additional testing was conducted this week to ensure the observatory’s health following an incident that occurred when the release of a clamp band caused a vibration throughout the observatory,” NASA said in a statement Wednesday.
The start of propellant loading keeps the $9.7 billion James Webb Space Telescope on track for liftoff Dec. 22 aboard a European Ariane 5 rocket. The half-hour launch window opens at 7:20 a.m. EST (1220 GMT; 9:20 a.m. French Guiana time).
Zitat A crane at the Guiana Space Center in South America will hoist the nearly $10 billion James Webb Space Telescope more than 15 stories above the floor of a rocket assembly hangar this weekend to position the observatory on top of its Ariane 5 launcher for blastoff later this month.
The delicate operation, accomplished with perfection before 111 previous Ariane 5 missions, will take most of the day to complete Saturday. If all goes well, engineers will put their hands on Webb for the final time Sunday before enclosing the 35-foot-tall (10.66-meter) observatory inside the Ariane 5’s Swiss-made payload fairing Monday.
“The next major step will be on this Saturday, and we will integrate the observatory onto the launcher,” said Thierry Wilmart, mission director for the Webb launch at Arianespace, the Ariane 5’s commercial operator. “It will be, of course, a major and sensitive operation, so basically we have a full review with the spacecraft project to review the whole operation, all the steps.”
Zitat With Webb encapsulated in the fairing, officials in French Guiana will turn their attention to a launch dress rehearsal Dec. 15, including the spacecraft, launch vehicle, and range safety teams. Next Friday, Dec. 17, managers will meet for a launch readiness review to discuss the status of all systems for rollout of the Ariane 5 from the final assembly building to the ELA-3 launch pad.
Wilmart said Arianespace and NASA teams have two days of schedule cushion for the Dec. 22 launch date, which itself is a four-day delay from a previous target date. The four-day slip allowed time for engineers to re-test components on Webb after the payload adapter incident last month.
"Les hommes seront toujours fous; et ceux qui croient les guérir sont les plus fous de la bande." - Voltaire
Zitat NASA delays launch of Webb telescope to no earlier than Dec. 24
Engineers discovered an intermittent data dropout associated with a piece of ground support equipment after connecting the James Webb Space Telescope with its Ariane 5 launcher over the weekend in French Guiana. The observatory’s long-awaited blastoff will be delayed at least two days to Dec. 24 to troubleshoot the problem, the head of NASA’s science division said Tuesday.
The mission was previously set for takeoff Dec. 22 from the European-run Guiana Space Center in Kourou, French Guiana, on the northeastern coast of South America. A final step in preparation for Webb’s blastoff occurred Saturday, when the observatory was raised atop its Ariane 5 launch vehicle.
But a technical issue held up the next step in the launch campaign. The Ariane 5’s Swiss-made payload shroud was supposed to be lowered over the three-story-tall observatory Monday.
In a brief statement, NASA wrote on its website late Tuesday that the Webb team is “working a communications issue between the observatory and the launch vehicle system.”
Thomas Zurbuchen, associate administrator for NASA’s science mission directorate, said Tuesday that engineers found an “interface problem” in a system that communicates with Webb while it’s on top of the Ariane 5 rocket.
“The way to think about it is it’s a ground support equipment thing,” Zurbuchen said Tuesday night in an interview with Spaceflight Now. “Basically, the data cables are dropping some frames.”
Technicians inside the Ariane 5 rocket’s final assembly building in Kourou have tried to diagnose the problem, but so far, haven’t been able to resolve it.
“Tomorrow, we’re going up there with the ground support equipment, and just really making sure we can flush out where the issue is,” Zurbuchen said. “We’ve tried a bunch of things, and we just haven’t been successful. This is a 100-meter cable that goes all the way from the top of the rocket to somebody’s computer. Somewhere in there (is the problem), is our guess.
“But it’s too early to say,” he said. “We need to go after it tomorrow, and put some specific equipment into play … The way these things work, once you find it, it’s easy.”
Daniel Neuenschwander, of the European Space Agency, says during a media telecon that a new launch date for the James Webb Space Telescope will be announced "within a couple of hours."
ESA’s Daniel Neuenschwander says at a media briefing that the JWST launch is still no earlier than Dec. 24 to work on the communications issue, but on a “good path” for an update in a couple hours.
Neuenschwander: issue is with a cable between the observatory and ground equipment.
NASA’s Thomas Zurbuchen: cable issue delayed an “aliveness test” of the observatory, which needs to be completed before encapsulation. Meeting on status of that test planned for ~6pm EST.
4:26 PM · Dec 16, 2021·Tweetbot for Mac
Jeff Foust @jeff_foust· 3h Replying to @jeff_foust
Zurbuchen adds that from the messages he’s seen he is “pretty optimistic” about status of JWST but adds, “don’t take that to the bank yet.”
Zurbuchen: nothing is routine with JWST, but after encapsulation it’s more routine because it’s closer to standard pre-launch preparations.
Zurbuchen: we believe that the cable problems have been solved; it was a “finicky” issue.
Neuenschwander: other than this and the clamp band issue, it has been a very smooth launch campaign.
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