Quote from: FutureSpaceTourist on 07/30/2020 05:19 pmSeparation confirmed https://twitter.com/torybruno/status/1288886632502956033Quote #MarsPerseverance on its way to the Red Planet...Is that the cruise stage spinning up or the Centaur spinning down? I understood that they were both spinning at separation to stabilize the cruise stage, so assuming it is the latter. Seems just odd to use thrusters so shortly after a separation event, or does the booster have some sort of yo-yo de-spin mechanism? And why would they do that, they can not do the separation burn when it is spinning?
Separation confirmed https://twitter.com/torybruno/status/1288886632502956033Quote #MarsPerseverance on its way to the Red Planet...
#MarsPerseverance on its way to the Red Planet...
Perhaps off topic, mods delete as see fit, but I have a question for our American members*. What were your opinions on the NASA webcast today? I ask because this one, as well as a lot of recent NASA webcasts have struck me as very ... well.. terrible**. Far more so than they used to be. Very bombastic, nationalist, over the top, and dumbed down. I watched for a few minutes before the actual launch, but it was all I could stand. Is it just me?*Other nationalities are of course welcome to reply, but since I know American TV in general strikes a different tone than what I'm used to here, I was wondering if it was just a cultural thing. **I originally called it "American" here, as I associate this style mostly with American TV, but I realise this is a value judgement and could be regarded as insulting.
Quote from: LouScheffer on 07/30/2020 03:42 pm39 bits per second? Sounds like safe mode... On the other hand, each time I refresh I see a different data rate. Maybe it's just cycling through all rates trying to get a good lock. Remembering back to when NASA was trying to get in touch with Opportunity, somebody on this group who was familiar with that website pointed out that you should not over-interpret it. The website is NOT showing the exact data that is coming over the DSN. I don't remember the specifics, but you're looking at something that is being interpreted and broadcast to the public, not the actual engineering data. So don't draw big conclusions from it.
39 bits per second? Sounds like safe mode... On the other hand, each time I refresh I see a different data rate. Maybe it's just cycling through all rates trying to get a good lock.
The website is NOT showing the exact data that is coming over the DSN. I don't remember the specifics, but you're looking at something that is being interpreted and broadcast to the public, not the actual engineering data.
Now showing 10K bits/sec. Presumably out of safe mode, or at least they commanded it to higher rates.
2. Throttle down to 95%3. 2.5 g's4. 4.6 g's5. One power level. Starts at ~0.4 g's, ends around ~0.6 g's at MECO1
Quote from: OneSpeed on 07/30/2020 04:16 pm values from SpaceX and Rocket Lab.where do I find these data?
values from SpaceX and Rocket Lab.
Update on @NASAPersevere: We have received telemetry (detailed spacecraft data) down from the spacecraft and have also been able to send commands up to the spacecraft. Perseverance is healthy and on its way to Mars.
MISSION UPDATES | Jul. 30, 2020Mars 2020 Perseverance Healthy and on Its WayThe team controlling NASA’s Mars 2020 Perseverance rover has received telemetry (detailed spacecraft data) down from the spacecraft and has also been able to send commands up to the spacecraft, according to Matt Wallace, the mission’s deputy project manager. The team, based at NASA’s Jet Propulsion Laboratory in Southern California, has confirmed that the spacecraft is healthy and on its way to Mars.Wallace provided a more detailed update on two issues during launch operations:“First, the proximity of the spacecraft to Earth immediately after launch was saturating the ground station receivers of NASA’s Deep Space Network. This is a known issue that we have encountered on other planetary missions, including during the launch of NASA’s Curiosity rover in 2011. The Perseverance team worked through prepared mitigation strategies that included detuning the receivers and pointing the antennas slightly off-target from the spacecraft to bring the signal within an acceptable range. We are now in lock on telemetry after taking these actions.“The second issue was a transient event involving temperature on the spacecraft. The mission uses a liquid freon loop to bring heat from the center of the spacecraft to radiators on the cruise stage (the part that helps fly the rover to Mars), which have a view to space. We monitor the difference in temperature between the warm inlet to the radiators and the cooler outlet from the radiators. As the spacecraft entered into Earth’s shadow, the Sun was temporary blocked by Earth, and the outlet temperature dropped. This caused the difference between the warm inlet and cooler outlet to increase. This transient differential tripped an alarm and caused the spacecraft to transition into the standby mode known as ‘safe mode.’“Modeling by the team predicted something like this could happen during eclipse – the time when the spacecraft is in Earth’s shadow – but we could not create this exact environment for tests prior to launch. Nor did we have flight data from Curiosity, because its trajectory had no eclipse. We set the limits for the temperature differential conservatively tight for triggering a safe mode. The philosophy is that it is far better to trigger a safe mode event when not required, than miss one that is. Safe mode is a stable and acceptable mode for the spacecraft, and triggering safe mode during this transitional phase is not problematic for Mars 2020.“With the understanding of the causes of these issues, we are conducting the operations necessary to move the spacecraft back out of safe mode and into normal cruise mode.”
NASA KennedyKSC-20200730-PH_GMW02_0299NASA Administrator Jim Bridenstine, center, watches Mars 2020 launch on the observation deck of the Operations and Support Building II at NASA's Kennedy Space Center in Florida on July 30, 2020. With him are students Vaneeza Rupani, at left, and Alex Mather. Rupani named the Ingenuity helicopter, and Mather names the Mars Perseverance rover. A United Launch Alliance Atlas V 541 rocket lifted off at 7:50 a.m. EDT from Space Launch Complex 41 at nearby Cape Canaveral Air Force Station, sending the rover and helicopter on their trek to Mars. The rover is part of NASA's Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. The rover will search for habitable conditions in the ancient past and signs of past microbial life on Mars. The Launch Services Program at Kennedy is responsible for launch management. Photo credit: NASA/Gianni Woods
Telescope closeup slowmo of @NASAPersevere on the Mighty @ULAlaunch Atlas V! Mind = blown. video magic from the rocket scope crew @OPT_Telescopes @Erdayastronaut @astroferg 🎥@considercosmos for @inversedotcom #Mars2020
Another ULA Bullseye. #MarsPerseverance is on its way to the Red Planet after a great start.
Cool stuff: My photo of the Mars 2020 launch is now on display at NASA's Jet Propulsion Laboratory in California🚀Thanks to the JPL team for reaching out and making this happen, and best of luck as Perseverance and Ingenuity make their way to the Red Planet!
Published on 14 Sep 2020"When you look at the team that put this robot together, and the team that put this launch vehicle together, that's what they've done. They've persevered." Go behind the scenes of our Perseverance Mars rover's July 30, 2020 launch with NASA Administrator Jim Bridenstine. On Feb. 18, 2021, the rover will land in Jezero Crater, Mars, where it will search for signs of ancient life.
