EMU No. 3003 will go down and which EMU will go up?
https://oiir.hq.nasa.gov/asap/documents/NASA_ASAP_3rd_qtr_public_meeting_June_6_2019_FINAL_RevB_Signed_tagged.pdfQuoteOne EMU (#3003) did have a minor issue with a suit pressure sensor during EVA #52 and is being held in “ready spare” status until it is replaced by SN# 3009 which is manifested on the Space-X 18 cargo flight slated for July. Additionally, a spare Fan Pump Separator Unit will be delivered on SX-18.
One EMU (#3003) did have a minor issue with a suit pressure sensor during EVA #52 and is being held in “ready spare” status until it is replaced by SN# 3009 which is manifested on the Space-X 18 cargo flight slated for July. Additionally, a spare Fan Pump Separator Unit will be delivered on SX-18.
The NSF article says this will be the third flight of the first stage from SpX-17 and SpX-18, so B1056.3.
Quote from: Steven Pietrobon on 07/25/2019 07:27 amThe NSF article says this will be the third flight of the first stage from SpX-17 and SpX-18, so B1056.3.Is there any particular reason why SpaceX seems to be flying all CRS flights from now on B1056.4? What is the benefit, if any, to having one dedicated first stage to loft Dragon to orbit?
NASA has been involved in SX's process of validating that particular booster for re-flight, and therefor has some "ownership" of the booster's history.
https://www.nasa.gov/content/upcoming-elana-cubesat-launchesSpX-19 now TBD, was on December, 4. So I suppose, it will be moved.
Quote from: DistantTemple on 07/25/2019 01:18 pmNASA has been involved in SX's process of validating that particular booster for re-flight, and therefor has some "ownership" of the booster's history.NASA has in the past also wanted the boosters that had flown the least demanding missions, and those happen to be mostly CRS ones
So its not the profile that defines which booster is used for NASA missions, its the paper trail.
I thought NASA (or SpaceX) said that B1056 would make its third spaceflight during SpX-19.
Quote from: ZachS09 on 08/28/2019 08:12 pmI thought NASA (or SpaceX) said that B1056 would make its third spaceflight during SpX-19.They said a while ago that it might. I don't recall that being confirmed since the last flight.
Aztechsat-1, el nanosatélite mexicano, será lanzado por la NASA en un cohete de Elon Musk el 4 de diciembrehttps://www.xataka.com.mx/investigacion/aztechsat-1-nanosatelite-mexicano-sera-lanzado-nasa-cohete-elon-musk-4-diciembre
Quote from: input~2 on 09/30/2019 08:20 amAztechsat-1, el nanosatélite mexicano, será lanzado por la NASA en un cohete de Elon Musk el 4 de diciembrehttps://www.xataka.com.mx/investigacion/aztechsat-1-nanosatelite-mexicano-sera-lanzado-nasa-cohete-elon-musk-4-diciembre
Quote from: gongora on 09/30/2019 02:18 pmQuote from: input~2 on 09/30/2019 08:20 amAztechsat-1, el nanosatélite mexicano, será lanzado por la NASA en un cohete de Elon Musk el 4 de diciembrehttps://www.xataka.com.mx/investigacion/aztechsat-1-nanosatelite-mexicano-sera-lanzado-nasa-cohete-elon-musk-4-diciembreBing translate: "Aztechsat-1, the Mexican nanosatellite, will be launched by NASA on an Elon Musk rocket on December 4."
Quick #SpaceX CRS-19 update gleaned from today's all-female spacewalk (on for Thursday or Friday a.m.) briefing: The faulty BCDU that Koch and Meir will replace will fly back on the CRS-19 Dragon in December. Unclear whether launch or splashdown would happen in that month.
Launch Alert 🚀 @SpaceX is targeting December 4th at 12:51 p.m. for their CRS-19 launch. Launch viewing opportunities are available at the LC-39 Observations Gantry. 👀Get your ticket using the link below! ⬇️💻: http://bit.ly/343AKi2
Launch hazard area issued by Air Force for 12/4 #SpaceX Falcon 9 with cargo Dragon. Liftoff targeted for 1251 ET (1751 UTC). No mention of a landing attempt.
F3438/19 - ROCKET LAUNCH WILL TAKE PLACE FLW RECEIVED FROM GOVERNMENT OF UNITED STATES OF AMERICA: HAZARDOUS OPS WILL BE CONDUCTED FOR ATMOSPHERIC RE-ENTRY AND SPLASHDOWN OF LAUNCH VEHICLE UPPER STAGE FALCON9 CRS19 WI THE FOLLOWING AREA: 58 52S 050 29E 55 59S 052 23E 55 26S 059 28E 54 58S 065 18E 54 08S 073 22E 52 46S 083 57E 51 25S 091 09E 49 01S 100 13E 46 34S 108 49E 44 49S 113 54E 46 47S 116 19E 52 02S 109 55E 52 57S 108 32E 56 09S 102 10E 59 05S 092 54E 61 08S 081 09E 61 48S 071 27E 61 08S 060 26E TO BEGINNING. SFC - UNL, PRI RE-ENTRY 042302-042344 BACKUP RE-ENTRY 052240-052322, 04 DEC 23:02 2019 UNTIL 05 DEC 23:22 2019. CREATED: 23 NOV 20:36 2019HYDROPAC 3933/19(29,61,75).SOUTHERN INDIAN OCEAN.DNC 02, DNC 03, DNC 04. 1. HAZARDOUS OPERATIONS, SPACE DEBRIS 042302Z TO 042344Z DEC, ALTERNATE 052240Z TO 052322Z DEC IN AREA BOUND BY 58-52S 050-29E, 55-59S 052-23E, 55-26S 059-28E, 54-58S 065-18E, 54-08S 073-22E, 52-46S 083-57E, 51-25S 091-09E, 49-01S 100-13E, 46-34S 108-49E, 44-49S 113-54E, 46-47S 116-19E, 52-02S 109-55E, 52-57S 108-32E, 56-09S 102-10E, 59-05S 092-54E, 61-08S 081-09E, 61-48S 071-27E, 61-08S 060-26E. 2. CANCEL THIS MSG 060022Z DEC 19.//
If they confirm this to be expendable, why would they do that?Is it because they want the most performance, or do they want to get rid of the booster for some other reason?
Apart from the visual confirmation, Space.com article also states that the new booster (1059.1) is going to be used for this mission.https://www.space.com/spacex-space-station-science-crs19-cargo.html
Quote from: Elthiryel on 11/26/2019 02:20 pmApart from the visual confirmation, Space.com article also states that the new booster (1059.1) is going to be used for this mission.https://www.space.com/spacex-space-station-science-crs19-cargo.htmlHow can you tell from that picture? There's all kinds of atmospheric distortion.
Quote from: whitelancer64 on 11/26/2019 02:30 pmQuote from: Elthiryel on 11/26/2019 02:20 pmApart from the visual confirmation, Space.com article also states that the new booster (1059.1) is going to be used for this mission.https://www.space.com/spacex-space-station-science-crs19-cargo.htmlHow can you tell from that picture? There's all kinds of atmospheric distortion.Is it shiney white?SpaceX doesn't repaintb used boosters, they are all sooty and black-ish.
Go Discovery showed up this morning & docked beside Go Quest, Searcher & Navigator. The deck is empty and I am not sure of the reason for the reunion. Could it be in conjunction with CRS-19 nxt week? 1st time I have ever gotten all these sisters at once. #SpaceX #ElonMusk #Space
Go Discovery showed up early this morning, the deck is empty and I am not sure of the reason for the trip but there is a reason for it being here on Thanksgiving Day. Could it be in conjunction with CRS-19 next week? #SpaceX #ElonMusk #Space
SPACEX FLEET: OCISLY is getting a clean up today after sitting idle for a couple of weeks now. Eagerly anticipating the recovery of booster B1059.1 from next weeks #CRS19 mission to the ISS. I am still not sure why it was not designated as a LZ1 landing but... #SpaceX #Space
It would appear that GoDiscovery is being outfitted with things. #SpaceXFleet
If it were a simple issue of the pad being unavailable then SpaceX would have placed OCISLY a few dozen kilometers off shore like for CRS-17. Clearly, something regarding CRS-19 has lead SpaceX to decide they need the extra prop margin.
Quote from: Orbiter on 12/01/2019 12:29 amIf it were a simple issue of the pad being unavailable then SpaceX would have placed OCISLY a few dozen kilometers off shore like for CRS-17. Clearly, something regarding CRS-19 has lead SpaceX to decide they need the extra prop margin.There's speculation on reddit that this is a dress rehearsal for DM-2.
Quote from: su27k on 12/01/2019 02:42 amQuote from: Orbiter on 12/01/2019 12:29 amIf it were a simple issue of the pad being unavailable then SpaceX would have placed OCISLY a few dozen kilometers off shore like for CRS-17. Clearly, something regarding CRS-19 has lead SpaceX to decide they need the extra prop margin.There's speculation on reddit that this is a dress rehearsal for DM-2.What kind of dress rehearsal, they already performed the DM-1 launch profile with downrange landing? What would be rehearsed with a cargo Dragon?
New blog post: "An interesting CRS-19 Falcon upper stage deorbit area" https://sattrackcam.blogspot.com/2019/12/an-interesting-crs-19-falcon-upper.html?m=1@SSC_NL
The Maritime Broadcast Warning above suggests that the CRS-19 upper stage deorbit happens much later, about 5.5 hours or 3.5 revolutions after launch. In addition, the area is shifted southwards compared to the CRS-19 ground track, indicating a deorbit from an orbital inclination clearly higher than the 51.6 degrees orbital inclination of the DRAGON. In fact, it fits an orbital inclination in the order of of 57-58 degrees, i.e. some 5 degrees higher in inclination.
Weather is 90% go for the #SpaceX #CRS19 launch to the International Space Station on December 4th. Liftoff is scheduled for 12:51 EST (17:51 UTC).https://twitter.com/nextspaceflight/status/1200904755368755200
The elapsed time for the CRS-19 second stage reentry is not much shorter than the time to coast from LEO to GEO. If and when I get the time it seems obvious to compare the delta-V of that ~6 degree plane change (guess:0.6 km/sec) to a GTO injection burn. If we see a second stage deorbit burn it would indicate that this is a test of direct injection into GEO. Somewhat like the first Heavy launch.
What is the longest FH-F9 second stage coast duration to date?
Wasn't FH Demo about 6 hours?
Quote from: pochimax on 12/03/2019 02:51 pmWhat is the longest FH-F9 second stage coast duration to date?Wasn't FH Demo about 6 hours?
T+5 hours 58 minutes. We're past perigee at 180 km and 7.8 km/s. The burn should be happening now.
Join me tomorrow and let's watch @SpaceX send a Dragon Capsule to the ISS for @NASA! This will be the ONE YEAR ANNIVERSARY exactly of CRS-16 which left a brand new Block 5 Falcon 9 booster a little wet! Let's see if SpaceX will nail this landing! -
Quote from: Comga on 12/03/2019 01:01 pmThe elapsed time for the CRS-19 second stage reentry is not much shorter than the time to coast from LEO to GEO. If and when I get the time it seems obvious to compare the delta-V of that ~6 degree plane change (guess:0.6 km/sec) to a GTO injection burn. If we see a second stage deorbit burn it would indicate that this is a test of direct injection into GEO. Somewhat like the first Heavy launch.What is the longest FH-F9 second stage coast duration to date?Maybe, are they trying to demonstrate TLI capabilities for the Gateway logistics contract?
What exactly is a "thermal demonstration"? Any educated guesses?
Has there been a previous SpaceX launch for NASA that scrubbed due to landing conditions rather than launch conditions?It used to be that landing conditions did not have any impact on launching.
Quote from: Prettz on 12/04/2019 03:26 pmWhat exactly is a "thermal demonstration"? Any educated guesses?If you’re referring to the test to be performed with the upper stage, it’s demonstrating that the stage can maintain thermal control during an extended coast (e.g., not developing localized cold spots and fuel gelling, and not developing hot spots and increased oxidizer boil-off. Extended upper stage coasts are necessary for some mission profiles (specifically, direct GEO insertion missions for government payloads).
Quote from: Herb Schaltegger on 12/04/2019 03:44 pmQuote from: Prettz on 12/04/2019 03:26 pmWhat exactly is a "thermal demonstration"? Any educated guesses?If you’re referring to the test to be performed with the upper stage, it’s demonstrating that the stage can maintain thermal control during an extended coast (e.g., not developing localized cold spots and fuel gelling, and not developing hot spots and increased oxidizer boil-off. Extended upper stage coasts are necessary for some mission profiles (specifically, direct GEO insertion missions for government payloads).And this is different from what they had already demonstrated? Or just a continuation of the same?
Quote from: mjcrsmith on 12/04/2019 04:16 pmHas there been a previous SpaceX launch for NASA that scrubbed due to landing conditions rather than launch conditions?It used to be that landing conditions did not have any impact on launching.No, this was also a problem in the Shuttle days. If the weather at the possible trans-Atlantic abort sites was bad, they would scrub even if the weather was fine at the Cape.
I understand about the Shuttle. But for the Falcon 9, my understanding was that for NASA payloads, getting the payload to orbit was the mission. If SpaceX could land the booster, fine, that was on them, but the F9 launch would not be delayed for something would prevent the landing of the booster. SpaceX would have to expend it.
Quote from: Prettz on 12/04/2019 04:27 pmQuote from: Herb Schaltegger on 12/04/2019 03:44 pmQuote from: Prettz on 12/04/2019 03:26 pmWhat exactly is a "thermal demonstration"? Any educated guesses?If you’re referring to the test to be performed with the upper stage, it’s demonstrating that the stage can maintain thermal control during an extended coast (e.g., not developing localized cold spots and fuel gelling, and not developing hot spots and increased oxidizer boil-off. Extended upper stage coasts are necessary for some mission profiles (specifically, direct GEO insertion missions for government payloads).And this is different from what they had already demonstrated? Or just a continuation of the same?Continuation. More data is always better
There is still the upper level winds. We don't know what they would have done with good launch weather and bad landing weather do we?
Quote from: LouScheffer on 12/04/2019 06:14 pmQuote from: mjcrsmith on 12/04/2019 04:16 pmHas there been a previous SpaceX launch for NASA that scrubbed due to landing conditions rather than launch conditions?It used to be that landing conditions did not have any impact on launching.No, this was also a problem in the Shuttle days. If the weather at the possible trans-Atlantic abort sites was bad, they would scrub even if the weather was fine at the Cape.I understand about the Shuttle. But for the Falcon 9, my understanding was that for NASA payloads, getting the payload to orbit was the mission. If SpaceX could land the booster, fine, that was on them, but the F9 launch would not be delayed for something would prevent the landing of the booster. SpaceX would have to expend it.To me, having NASA agree to delay due to the Landing of the booster is interesting. Cheers,Roger
(Side question: was it high altitude wind speeds or wind shear? Or both?)
ChrisG's wind speed tweet yesterday showed an approx. wind speed of 90 mph @ 12,000 M (or roughly 39,000 ft.). At that altitude the air is much thinner than at sea level, so what would be the effective wind speed at that altitude?
Quote from: FutureSpaceTourist on 12/04/2019 02:20 pmhttps://twitter.com/trevormahlmann/status/1202244124734308355Quote Get your download fingers ready! Here’s my 289.5 megapixel panorama of a (rare) brand new #Falcon9 B1059.1 and Dragon resupply capsule headed to the @Space_Station today at 12:51pm ET! 🚀This appears to be behind a paywall. Or am I missing something?
https://twitter.com/trevormahlmann/status/1202244124734308355Quote Get your download fingers ready! Here’s my 289.5 megapixel panorama of a (rare) brand new #Falcon9 B1059.1 and Dragon resupply capsule headed to the @Space_Station today at 12:51pm ET! 🚀
Get your download fingers ready! Here’s my 289.5 megapixel panorama of a (rare) brand new #Falcon9 B1059.1 and Dragon resupply capsule headed to the @Space_Station today at 12:51pm ET! 🚀
Quote from: sferrin on 12/05/2019 01:18 pmQuote from: FutureSpaceTourist on 12/04/2019 02:20 pmhttps://twitter.com/trevormahlmann/status/1202244124734308355Quote Get your download fingers ready! Here’s my 289.5 megapixel panorama of a (rare) brand new #Falcon9 B1059.1 and Dragon resupply capsule headed to the @Space_Station today at 12:51pm ET! 🚀This appears to be behind a paywall. Or am I missing something? Works fine for me. It’s a link to a public tweet. The site link in the tweet takes you to the full-resolution image on the photographer’s site.
In my case, the link to the photographer's site asked be to become a Patron or to log in. I did not go any further, but I do understand if someone wants to limit repeated large downloads from their site, so the pause seemed reasonable.I hope that helps.
Just before the video cut off, it appears that the camera on the second caught the Dragon on its separate course.
Was I hearing things when the guy commentating on the launch mentioned the launch abort would not happen until Feb 2020?
There was a ring similar to that on a past mission that was attributed to frost/ice buildup around a port on the first stage.
Quote from: Kansan52 on 12/05/2019 04:46 pmJust before the video cut off, it appears that the camera on the second caught the Dragon on its separate course.I don't recall seeing this view before of a Dragon with arrays deployed - seen from stage 2.
https://twitter.com/trevormahlmann/status/1202643983207407616QuoteBeautifully clear weather today for #CRS19! Here’s a long exposure I made on my iPhone with the @NightCapApp from the roof of the Vehicle Assembly Building! GO Dragon!⚙️/⬇️/🖼: tmahlmann.com/photos/Rockets…
Beautifully clear weather today for #CRS19! Here’s a long exposure I made on my iPhone with the @NightCapApp from the roof of the Vehicle Assembly Building! GO Dragon!⚙️/⬇️/🖼: tmahlmann.com/photos/Rockets…
I do not recall ever seeing a launch image like this before, it's fascinating. Is that the exhaust gases falling back down into the atmosphere? There wouldn't be anything holding them up, so it's clouds gently raining down from the sky.
Any word on the 2nd stage coast/restart experiment? Will we know anything?
Congrats to SpaceX, NASA and of course NSF Did I see correctly that for the 1st time ever, the F9S2 M1DVac Nozzle stiffener ring decided it wasn't done yet and rode the hot nozzle all the way to orbit?Usually it comes off a few seconds after ignition, but I'm pretty sure I saw it remain all the way to SECO this time.Can anyone confirm that? Is it really the first time it does that?cheers
No, you can clearly see the ring separate. Look at about 17:48 in the archived live stream.
So why did the SpaceX commentator say today's booster recovery was the 20th? Per the first two posts of the manifest, there have been over 40.https://forum.nasaspaceflight.com/index.php?topic=43418.0
First Stage Landing Statsas of 12/05/2019---------------------------------------Successes/Attempts 45/54*F9 Successes/Attempts 39/45FH Successes/Attempts 6/9*OCISLY 20/27*JRTI 7/8CC LZ-1 13/14CC LZ-2 3/3VA LZ-4 2/2---------------------------------------* FH-2 Core B1055.1 landed successfully on OSCILY, but subsequently toppled and was lost. Is not counted as a success in these numbers.
What are the TLEs for the initial orbit insertion?
Quote from: Norm38 on 12/05/2019 08:59 pmQuote from: FutureSpaceTourist on 12/05/2019 05:39 pm https://twitter.com/trevormahlmann/status/1202643983207407616QuoteBeautifully clear weather today for #CRS19! Here’s a long exposure I made on my iPhone with the @NightCapApp from the roof of the Vehicle Assembly Building! GO Dragon!⚙️/⬇️/🖼: tmahlmann.com/photos/Rockets…I do not recall ever seeing a launch image like this before, it's fascinating. Is that the exhaust gases falling back down into the atmosphere? There wouldn't be anything holding them up, so it's clouds gently raining down from the sky.I suspect it is the contrail that forms around Max-Q, slowly drifting and dispersing in this time-lapse. - Ed Kyle
Quote from: FutureSpaceTourist on 12/05/2019 05:39 pm https://twitter.com/trevormahlmann/status/1202643983207407616QuoteBeautifully clear weather today for #CRS19! Here’s a long exposure I made on my iPhone with the @NightCapApp from the roof of the Vehicle Assembly Building! GO Dragon!⚙️/⬇️/🖼: tmahlmann.com/photos/Rockets…I do not recall ever seeing a launch image like this before, it's fascinating. Is that the exhaust gases falling back down into the atmosphere? There wouldn't be anything holding them up, so it's clouds gently raining down from the sky.
Quote from: shooter6947 on 12/05/2019 06:59 pmAny word on the 2nd stage coast/restart experiment? Will we know anything?Maybe the experiment is still underway … - Ed Kyle
Falcon 9 cargo mission for NASA demonstrated long-duration coast required by U.S. Air ForceLOS ANGELES The upper stage of the SpaceX Falcon 9 mission to the International Space Station Dec. 5 successfully performed a six-hour coast and a deorbit burn, a test that had been requested by the U.S. Air Force to demonstrate the vehicle can deliver national security payloads directly to geosynchronous Earth orbit.>
So I noted in this post https://forum.nasaspaceflight.com/index.php?topic=49550.msg2022448#msg2022448 that SpaceX 'limited stage 2 acceleration to 3.5g'. This sounded familiar to me from I think ULA launches describing a '3.5g throttle segment', and perhaps somewhere else where I'd heard it was desirable for some payloads to limit acceleration to this level. Was this perhaps yet another aspect, along with the stage 2 on orbit, testing to certify Falcon for certain military and intelligence payloads? Or nothing to do with anything.
Cargo.
Curious illustrationFrom NASA?Is that the Starliner “trunk”?
I noticed yesterday when they brought OCISLY back with CRS19 that the first stage looked like it was leaning slightly.Is that a problem with the hydraulics in the landing legs?It's not a very big lean just curious.
Quote from: Comga on 12/08/2019 03:19 pmCurious illustrationFrom NASA?Is that the Starliner “trunk”?That's the Dragon trunk.
Quote from: gongora on 12/08/2019 03:42 pmQuote from: Comga on 12/08/2019 03:19 pmCurious illustrationFrom NASA?Is that the Starliner “trunk”?That's the Dragon trunk.No it’s not. It has narrow external pods in threefold symmetry, no solar panels, and some small protuberance.
Quote from: Comga on 12/08/2019 06:15 pmQuote from: gongora on 12/08/2019 03:42 pmQuote from: Comga on 12/08/2019 03:19 pmCurious illustrationFrom NASA?Is that the Starliner “trunk”?That's the Dragon trunk.No it’s not. It has narrow external pods in threefold symmetry, no solar panels, and some small protuberance.Pretty sure its Dragon. It has some weird perspective going on with the solar array covers.
A SpaceX official said Friday that engineers added baffles to the second stage tanks to help prevent liquid propellant from pooling on the tank walls. The official said SpaceX’s earlier long-duration coast demonstrations, such as the STP-2 mission on the Falcon Heavy, proved the upper stage could perform maneuvers over several hours, but that engineers did not quite see the results they desired.
Space News...QuoteFalcon 9 cargo mission for NASA demonstrated long-duration coast required by U.S. Air ForceLOS ANGELES The upper stage of the SpaceX Falcon 9 mission to the International Space Station Dec. 5 successfully performed a six-hour coast and a deorbit burn, a test that had been requested by the U.S. Air Force to demonstrate the vehicle can deliver national security payloads directly to geosynchronous Earth orbit.
Falcon 9 cargo mission for NASA demonstrated long-duration coast required by U.S. Air ForceLOS ANGELES The upper stage of the SpaceX Falcon 9 mission to the International Space Station Dec. 5 successfully performed a six-hour coast and a deorbit burn, a test that had been requested by the U.S. Air Force to demonstrate the vehicle can deliver national security payloads directly to geosynchronous Earth orbit.
Quote from: docmordrid on 12/08/2019 12:21 amSpace News...QuoteFalcon 9 cargo mission for NASA demonstrated long-duration coast required by U.S. Air ForceLOS ANGELES The upper stage of the SpaceX Falcon 9 mission to the International Space Station Dec. 5 successfully performed a six-hour coast and a deorbit burn, a test that had been requested by the U.S. Air Force to demonstrate the vehicle can deliver national security payloads directly to geosynchronous Earth orbit.Something similar to the requirement above was also demonstrated earlier, on March 4, 2016 with the SES-9 launch. After a long delay following the CRS-7 anomaly in 2015, SpaceX compensated SES with a supersychronous injection.
Quote from: CyndyC on 12/09/2019 03:11 amQuote from: docmordrid on 12/08/2019 12:21 amSpace News...QuoteFalcon 9 cargo mission for NASA demonstrated long-duration coast required by U.S. Air ForceLOS ANGELES The upper stage of the SpaceX Falcon 9 mission to the International Space Station Dec. 5 successfully performed a six-hour coast and a deorbit burn, a test that had been requested by the U.S. Air Force to demonstrate the vehicle can deliver national security payloads directly to geosynchronous Earth orbit.Something similar to the requirement above was also demonstrated earlier, on March 4, 2016 with the SES-9 launch. After a long delay following the CRS-7 anomaly in 2015, SpaceX compensated SES with a supersychronous injection. Putting something in supersync GTO is not remotely similar to putting it directly in GEO.
Thanks, @tim_cook! 🍎🤯🚀Love the 'Sent from my iPhone' 😃
Today’s Falcon 9 launch of #CRS19 — Shot on an iPhone placed at Space Launch Complex 40! #ShotoniPhone It’s amazing how far smartphone cameras have come 🚀🤯
SpaceX retracts Falcon 9 booster’s landing legs a second time after speedy reuse..By Eric Ralph Posted on July 29, 2019https://www.teslarati.com/spacex-retracts-falcon-9-landings-legs-second-time/
QuoteSpace Videos4K video of the #SpaceX #Dragon as it approached the ISS on 8th December. Mission CRS-19 was NASA's Cargo Resupply Mission to the space station.This video was created using thousands of individual photos taken by astronauts aboard the ISS then using software to interpolate missing frames, we have been able to recreate it in real-time.The process isn't perfect and you may notice some artifacts but I think that on the whole it looks pretty cool!Thanks for watching - why not support this channel and help us grow.https://www.youtube.com/channel/UCakg...
Space Videos4K video of the #SpaceX #Dragon as it approached the ISS on 8th December. Mission CRS-19 was NASA's Cargo Resupply Mission to the space station.This video was created using thousands of individual photos taken by astronauts aboard the ISS then using software to interpolate missing frames, we have been able to recreate it in real-time.The process isn't perfect and you may notice some artifacts but I think that on the whole it looks pretty cool!Thanks for watching - why not support this channel and help us grow.https://www.youtube.com/channel/UCakg...
Has anyone ever seen the Dragon following behind the ISS shortly before/after berthing? I noticed the ISS is flying overhead shortly after canadarm release and around 80 minutes after sunset. I curious to know if it's possible to see it and how long after departure I'd have to wait to see it.
Quote from: AndrewRG10 on 01/07/2020 06:18 amHas anyone ever seen the Dragon following behind the ISS shortly before/after berthing? I noticed the ISS is flying overhead shortly after canadarm release and around 80 minutes after sunset. I curious to know if it's possible to see it and how long after departure I'd have to wait to see it.Go to https://www.heavens-above.com/PassSummary.aspx?satid=25544&lat=0&lng=0&loc=Unspecified&alt=0&tz=UCT, enter your location, and it will tell you when the ISS is visible. Click on the pass in the table closest to the Dragon sep, and it will display a sky map showing the path of the ISS. The ISS will be one of the brightest objects in the sky. You might need binoculars to see the Dragon.
https://twitter.com/NASASpaceflight/status/1214491407685210112
Quote from: Chris Bergin on 01/07/2020 09:18 amhttps://twitter.com/NASASpaceflight/status/1214491407685210112This seems like another of those “out of an abundance of caution” investigationsWhen the solar panels are “glinting” they are reflecting light from the Sun, which subtends a half degree. Therefore, any particular portion of the solar panels that flexes by a quarter degree moves the “line of sight” the equivalent of the full angular diameter of the sun. That will make dramatic changes in brightness. The Dracos do not fire perfectly smoothly. The solar panels are long, light, flexible, segmented structures. It would be very surprising if they DIDN’T shake with large multiples of that tiny angle. I would EXPECT the brightness of sunlight to vary dramatically and rapidly. Dragon doesn’t need plume impingement to create this visible effect. There are many people at NASA with the appropriate knowledge of the nature of scattered light (we affectionately call them “scatterbrains”) but they may never be asked if this is considered a propulsion problem. It’s like asking a surgeon what to do about a medical issue. They routinely recommend surgery. Plume modeling will be another “rabbit hole” that could result in delays and unnecessary modifications. Let’s hope that doesn’t happen.
(Snip)And in case I'm misunderstanding your post, he wasn't talking about the Dragon's panels; he was talking about plume impingement on and movement of the Cygnus' panels.
Noticed some pretty gnarly outgassing / contamination on the surfaces surrounding the GNC bay. Inside of the CBM petals is getting pretty brown from outgassing as well.
Quote from: SWGlassPit on 01/07/2020 08:00 pmNoticed some pretty gnarly outgassing / contamination on the surfaces surrounding the GNC bay. Inside of the CBM petals is getting pretty brown from outgassing as well.Are you (and the ISS community) certain the discoloration is (1) real (e.g., not an artifact of lighting and color-balance); and (2) a result of outgassing (from which surfaces and materials?); surface contamination (e.g., propellant residues ); or oxidation from long-term orbital exposure to UV and atomic oxygen or other trace contaminants such as ammonia?
On (1): yes, absolutely. I've seen it personally on returned hardware, and this type of discoloration is visible in multiple other places that have known outgassing materials nearby.On (2): It's a combination of things. Contaminants outgas from all sorts of surfaces (silicone materials are notoriously bad for this, but a large number of polymeric materials spit out quite a bit of stuff). When it's initially deposited, it's clear, but UV radiation causes discoloration. This effect is visible on large portions of the Russian segment, and on the US segment, it's particularly bad on the edges of the airlock hatch thermal cover.Here's a WIRED article from a year ago that talks pretty extensively about the problem.
