That’s why there are back-ups!
NASA/Mark Garcia — International Space Station managers will meet Sunday morning to discuss a forward plan for dealing with the apparent failure of one of two fully redundant multiplexer-demultiplexer (MDM) data relay boxes on the S0 truss of the complex.
External MDM-1 apparently failed at 1:13 p.m. Central time Saturday. Multiple attempts by flight controllers to restore power to the relay box have not been successful. Troubleshooting efforts are continuing. The Expedition 51 crew was informed of the apparent failure and is not in any danger. The MDMs on the truss control the functionality of the station’s solar arrays and radiators among other equipment, and provide power to a variety of other station components.
Because the two MDMs have full redundancy, the apparent loss of MDM-1 has had no impact on station operations.
Tomorrow is another launch to the International Space Station, is one is a manned mission. Wait until you find out how quickly they will arrive below!
I expect to have a live link up at the 02:15 EDT / 06:15 UTC provided my time arithmetic is correct.
Fischer and his Expedition 51-52 crewmate Fyodor Yurchikhin, of the Russian space agency Roscosmos, are scheduled to launch at 3:13 a.m. EDT Thursday, April 20 (1:13 p.m. Baikonur time), from the Baikonur Cosmodrome aboard a Soyuz MS-04 spacecraft. NASA TV coverage of the launch will begin at 2:15 a.m.
The pair will travel on a fast-track, six-hour course to the space station and dock to the Poisk module at 9:23 a.m. NASA TV coverage of the docking will begin at 8:30 a.m. Once at the station, they will be welcomed by Expedition 51 Commander Peggy Whitson of NASA and Flight Engineers Oleg Novitskiy of Roscosmos and Thomas Pesquet of ESA (European Space Agency). Hatches between the Soyuz and space station will open at 11:05 a.m. NASA TV coverage of hatch opening and welcome ceremonies will begin at 10:45 a.m.
Expedition 51 will continue work on hundreds of experiments in biology, biotechnology, physical science and Earth science aboard the International Space Station, humanity’s only microgravity laboratory.
Fischer, a first-time space flier, and Yurchikhin, a veteran of four spaceflights, will spend more than four months aboard the orbiting laboratory before returning to Earth in early September.
Live event starts at 12:54 ET / 17:54 UTC, since this is the launch window opening time it is a little unclear how long between the start of the event time and launch.
WOW!!!!!!! FANTASTIC!!!!!! If you missed this fantastic launch, I will have a replay posted tomorrow, simply amazing, we got to watch not just the launch but the First-stage successfully land on the barge!
From Space X:
SpaceX’s Falcon 9 rocket will deliver 10 satellites to low-Earth orbit for Iridium, a global leader in mobile voice and data satellite communications. The 10 satellites are the first of at least 70 satellites that SpaceX will be launching for Iridium’s next generation global satellite constellation, Iridium NEXT.
SpaceX is targeting launch of Iridium-1 from Space Launch Complex 4E at Vandenberg Air Force Base in California. The instantaneous launch window opens on January 14 at 9:54:39 am PST or 5:54:39 pm UTC. The satellites will begin deployment about an hour after launch.
The original caption from NASA:
This vertically exaggerated view shows scalloped depressions in Mars’ Utopia Planitia region, one of the area’s distinctive textures that prompted researchers to check for underground ice, using ground-penetrating radar aboard NASA’s Mars Reconnaissance Orbiter.
More than 600 overhead passes with the spacecraft’s Shallow Radar (SHARAD) instrument provided data for determining that about as much water as the volume of Lake Superior lies in a thick layer beneath a portion of Utopia Planitia.
These scalloped depressions on the surface are typically about 100 to 200 yards or meters wide. The foreground of this view covers ground about one mile (1.8 kilometers) across. The perspective view is based on a three-dimensional terrain model derived from a stereo pair of observations by the High Resolution Imaging Science Experiment (HiRISE) camera on the Mars Reconnaissance Orbiter. One was taken on Dec. 25, 2006, the other on Feb. 2, 2007.
The vertical dimension is exaggerated fivefold in proportion to the horizontal dimensions, to make texture more apparent in what is a rather flat plain.
Similar scalloped depressions are found in portions of the Canadian Arctic, where they are indicative of ground ice.
Diagonal striping on this map of a portion of the Utopia Planitia region on Mars indicates the area where a large subsurface deposit rich in water ice was assessed using the Shallow Radar (SHARAD) instrument on NASA’s Mars Reconnaissance Orbiter.
The scale bar at lower right indicates 140 kilometers (76 miles). The violet vertical bars show depth to the bottom of the ice-rich deposit, as estimated from SHARAD passes overhead. Darkest violet indicates a depth of about 550 feet (about 170 meters). Palest violet indicates a depth of about 33 feet (10 meters). The value of 2.8 plus-or-minus 0.8 in the upper right corner denotes the dielectric constant, a property related to radar reflectivity. The value of 14,300 cubic kilometers is an estimate of the volume of water in the deposit. — NASA
Images: NASA/JPL-Caltech/Univ. of Rome/ASI/PSI/Univ. of Arizona
Good news from NASA and the Juno team. The Juno spacecraft is out of safe mode and everything looks good – so far. Once the instruments are back on and stable the team can relax even if only a little. Finding out the cause of the problem is going to be so interesting. Juno is traveling very close to the surface of Jupiter and it is possible exposure to the local environment could be a problem. Time will tell, but for now all is well.
NASA’s Juno spacecraft at Jupiter has left safe mode and has successfully completed a minor burn of its thruster engines in preparation for its next close flyby of Jupiter.
Mission controllers commanded Juno to exit safe mode Monday, Oct. 24, with confirmation of safe mode exit received on the ground at 10:05 a.m. PDT (1:05 p.m. EDT). The spacecraft entered safe mode on Oct. 18 when a software performance monitor induced a reboot of the spacecraft’s onboard computer. The team is still investigating the cause of the reboot and assessing two main engine check valves.
“Juno exited safe mode as expected, is healthy and is responding to all our commands,” said Rick Nybakken, Juno project manager from NASA’s Jet Propulsion Laboratory in Pasadena, California. “We anticipate we will be turning on the instruments in early November to get ready for our December flyby.”
In preparation for that close flyby of Jupiter, Juno executed an orbital trim maneuver Tuesday at 11:51 a.m. PDT (2:51 p.m. EDT) using its smaller thrusters. The burn, which lasted just over 31 minutes, changed Juno’s orbital velocity by about 5.8 mph (2.6 meters per second) and consumed about 8 pounds (3.6 kilograms) of propellant. Juno will perform its next science flyby of Jupiter on Dec. 11, with time of closest approach to the gas giant occurring at 9:03 a.m. PDT (12:03 p.m. EDT). The complete suite of Juno’s science instruments, as well as the JunoCam imager, will be collecting data during the upcoming flyby.
“We are all excited and eagerly anticipating this next pass close to Jupiter,” said Scott Bolton, principal investigator of Juno from the Southwest Research Institute in San Antonio. “The science collected so far has been truly amazing.”
This sounds something like an evolution of a wake to me. I could see the plasma, which I would guess would be rotating, coalesce into spherical masses or “balls”.
Here is the NASA description:
This four-panel graphic illustrates how the binary-star system V Hydrae is launching balls of plasma into space.
Panel 1 shows the two stars orbiting each other. One of the stars is nearing the end of its life and has swelled in size, becoming a red giant.
In panel 2, the smaller star’s orbit carries the star into the red giant’s expanded atmosphere. As the star moves through the atmosphere, it gobbles up material from the red giant that settles into a disk around the star.
The buildup of material reaches a tipping point and is eventually ejected as blobs of hot plasma along the star’s spin axis, as shown in panel 3.
This ejection process is repeated every eight years, which is the time it takes for the orbiting star to make another pass through the bloated red giant’s envelope, as shown in panel 4.