Author Topic: SpaceX Falcon 9 / Dragon 2 : SpX-DM1 : March 2, 2019 : DISCUSSION  (Read 591430 times)

Online Alexphysics

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Crew is currently searching for the source of an odor, my guess is that it's dragon

Curious, what kind of odor?

Google translate:

"MOSCOW, March 5 - RIA News . After the arrival of the American unmanned spacecraft Dragon-2 on the ISS, the crew smelled alcohol, a source in the Russian rocket and space industry told RIA Novosti.
Isopropyl alcohol is a colorless liquid with a strong odor and a mild bitter taste. It is used in cosmetics, perfumery, household chemicals, medicine as an antiseptic. Moderately toxic, flammable. According to Russian GOST, the maximum permissible concentration of isopropyl alcohol vapor in the air is ten milligrams per cubic meter.
...
According to him, the concentration of alcohol in the atmosphere of the station on March 3 was about six milligrams per cubic meter, which did not exceed the permissible limits, but it could affect the operation of the equipment of the station. According to the instructions of the ground specialists, the crew switched on the air purification systems, as a result of which the alcohol concentration decreased to about two milligrams per cubic meter, the source added.
He noted that prior to the docking of the Dragon-2 spacecraft, the alcohol concentration in the atmosphere of the ISS was one tenth of a milligram per cubic meter."

https://ria.ru/20190305/1551566207.html

You must ventilate after cleaning...

Punder translate: SpaceX sucks! We hate them! (sob) Elon Musk is a BIG FAT MEANIE!!!

I canít find the article that discussed it, but this has been an issue with the Cargo Dragon missions too.

You're confusing this issue with the contamination issue on the EXTERIOR of the ISS when Cargo Dragons have arrived. This is on the INTERIOR.

Offline schaban

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Crew is currently searching for the source of an odor, my guess is that it's dragon

Curious, what kind of odor?

https://ria.ru/20190305/1551566207.html

You must ventilate after cleaning...

I think it is fake news. Russian norms are for constant 8 hours/day concentrations. I found following in  https://www.nap.edu/read/5170/chapter/15#362 :


TABLE 11-3 Spacecraft Maximum Allowable Concentrations

Duration ppm mg/m3 Target Toxicity
1 h      400  1000  CNS depression, irritation
24 h     100   240  CNS depression, irritation, hepatoxicity
7 d       60   150  CNS depression, irritation, hepatoxicity
30 d      60   150  CNS depression, irritation, peripheral nerve damage
180 d     60   150  CNS depression, irritation


6 mg/m3 is nowhere near any dangerous levels.

Crew is currently searching for the source of an odor, my guess is that it's dragon

Curious, what kind of odor?


Google translate:

"MOSCOW, March 5 - RIA News . After the arrival of the American unmanned spacecraft Dragon-2 on the ISS, the crew smelled alcohol, a source in the Russian rocket and space industry told RIA Novosti.
Isopropyl alcohol is a colorless liquid with a strong odor and a mild bitter taste. It is used in cosmetics, perfumery, household chemicals, medicine as an antiseptic. Moderately toxic, flammable. According to Russian GOST, the maximum permissible concentration of isopropyl alcohol vapor in the air is ten milligrams per cubic meter.
...
According to him, the concentration of alcohol in the atmosphere of the station on March 3 was about six milligrams per cubic meter, which did not exceed the permissible limits, but it could affect the operation of the equipment of the station. According to the instructions of the ground specialists, the crew switched on the air purification systems, as a result of which the alcohol concentration decreased to about two milligrams per cubic meter, the source added.
He noted that prior to the docking of the Dragon-2 spacecraft, the alcohol concentration in the atmosphere of the ISS was one tenth of a milligram per cubic meter."

https://ria.ru/20190305/1551566207.html

You must ventilate after cleaning...

Punder translate: SpaceX sucks! We hate them! (sob) Elon Musk is a BIG FAT MEANIE!!!

I canít find the article that discussed it, but this has been an issue with the Cargo Dragon missions too.

You're confusing this issue with the contamination issue on the EXTERIOR of the ISS when Cargo Dragons have arrived. This is on the INTERIOR.

Yea, I was about to post an update and apologize. This is a link to that event:

https://www.wired.com/story/a-spacex-delivery-capsule-may-be-contaminating-the-iss/

Offline SWGlassPit

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Crew is currently searching for the source of an odor, my guess is that it's dragon

Curious, what kind of odor?

https://ria.ru/20190305/1551566207.html

You must ventilate after cleaning...

I think it is fake news. Russian norms are for constant 8 hours/day concentrations. I found following in  https://www.nap.edu/read/5170/chapter/15#362 :


TABLE 11-3 Spacecraft Maximum Allowable Concentrations

Duration ppm mg/m3 Target Toxicity
1 h      400  1000  CNS depression, irritation
24 h     100   240  CNS depression, irritation, hepatoxicity
7 d       60   150  CNS depression, irritation, hepatoxicity
30 d      60   150  CNS depression, irritation, peripheral nerve damage
180 d     60   150  CNS depression, irritation


6 mg/m3 is nowhere near any dangerous levels.

Even though it's not toxic to crew, it does affect the behavior of the water purification system, as it appears in the condensate.

Online Herb Schaltegger

Reentry on Friday will be on a Descending Node, with Crew Dragon cutting across North America from Vancouver, British Columbia to Georgia in the pre- and post-dawn hours (depending on location) as she heads towards splashdown off the east coast of Florida.

Those under the flight path (the orange line in this image) might have the opportunity to see reentry if conditions are right.

(Image: GoISSWatch app)

Is there a link to a higher-res version of this somewhere? It looks like I will be more or less directly beneath this path, though likely too far north (Tennessee) to see plasma.

It's also predicted to rain most of the day but still ...
Ad astra per aspirin ...

Offline joncz

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Reentry on Friday will be on a Descending Node, with Crew Dragon cutting across North America from Vancouver, British Columbia to Georgia in the pre- and post-dawn hours (depending on location) as she heads towards splashdown off the east coast of Florida.

Those under the flight path (the orange line in this image) might have the opportunity to see reentry if conditions are right.

(Image: GoISSWatch app)

Is there a link to a higher-res version of this somewhere? It looks like I will be more or less directly beneath this path, though likely too far north (Tennessee) to see plasma.

It's also predicted to rain most of the day but still ...

I use Heavens-Above.  Put your location in, choose ISS - All passes and pick the Friday 0830ET pass; then click the Ground Track link.

Offline StuffOfInterest

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Based on the "EARTH STAYS" message in the orbital ops update thread, I guess ISS has a new mascot.

I wish they had put something from the station (other than the planned cargo) in its place for the trip home.

Offline Lar

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Based on the "EARTH STAYS" message in the orbital ops update thread, I guess ISS has a new mascot.

I wish they had put something from the station (other than the planned cargo) in its place for the trip home.
Like the flag?

Have to wait for that one.
"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk
"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

Offline satcomopsuk

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Nav warning relating to the landing zones.


Offline jcopella

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Apologies if this is answered elsewhere as I haven't reviewed all 57 pages, but I'm curious about the aluminum-ish-looking blanking plate or cover that seems to be installed where I'd expect to see the Draco thrusters for the abort system. Is this a cover that will be ejected or is it a blanking plate for aero purposes that will be replaced with real installed Dracos in the next (crewed) increment, or .. something else?
"I don't think the country is really going to realize what a good deal that we had in the space shuttle until we don't have it anymore." -- Wayne Hale

Offline Zed_Noir

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What is the the visibility of the crew Dragon with commercial infra-red/thermal imager along the reentry track?

Offline cppetrie

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Apologies if this is answered elsewhere as I haven't reviewed all 57 pages, but I'm curious about the aluminum-ish-looking blanking plate or cover that seems to be installed where I'd expect to see the Draco thrusters for the abort system. Is this a cover that will be ejected or is it a blanking plate for aero purposes that will be replaced with real installed Dracos in the next (crewed) increment, or .. something else?
It’s just a reflective seal coating over the thermal protection material (PICA-X?) to keep water out of it. The bottom heatshield has the same coating. There are working Draco’s and SuperDracos on this capsule. The SuperDracos ports have a film over them that is blown off the first time they are used. Draco’s has the same. Check the pre-launch pictures as compared to on-orbit pictures, and you’ll see what I mean.

Offline jcopella

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Apologies if this is answered elsewhere as I haven't reviewed all 57 pages, but I'm curious about the aluminum-ish-looking blanking plate or cover that seems to be installed where I'd expect to see the Draco thrusters for the abort system. Is this a cover that will be ejected or is it a blanking plate for aero purposes that will be replaced with real installed Dracos in the next (crewed) increment, or .. something else?
Itís just a reflective seal coating over the thermal protection material (PICA-X?) to keep water out of it. The bottom heatshield has the same coating. There are working Dracoís and SuperDracos on this capsule. The SuperDracos ports have a film over them that is blown off the first time they are used. Dracoís has the same. Check the pre-launch pictures as compared to on-orbit pictures, and youíll see what I mean.

Ah, so IOW it's Dragon butcher paper :D   Thank you!
"I don't think the country is really going to realize what a good deal that we had in the space shuttle until we don't have it anymore." -- Wayne Hale

Offline DatUser14

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Latest article says there will be a Draco burn to physically separate from the IDA. Was that necessary for similar ports(APAS-95, etc) or is this unique to crew dragon and the SpaceX Docking System?
Titan IVB was a cool rocket

Offline jig

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To everyone:

Thanks very much for everything.  Missed the first closing hatch videos and can always rely on you all here.

:)

Offline Asteroza

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Is SpaceX gonna do a webcast of the landing? Or just NasaTV?

Offline John Alan

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Over 24 hours old, so will put this here in case others missed it...  ;)

https://twitter.com/Astro_DavidS/status/1103445230404231168

Offline Lars-J

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Latest article says there will be a Draco burn to physically separate from the IDA. Was that necessary for similar ports(APAS-95, etc) or is this unique to crew dragon and the SpaceX Docking System?

How else would they separate? Any push from the docking adapter would be very slight.

Usually there is a very slight burn to get some separation, and then a longer burn once outside the immediate vicinity.
« Last Edit: 03/08/2019 03:39 am by Lars-J »

Offline Bogeyman

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Is Earth going back with Ripley or does it stay on the ISS?

Offline penguin44

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Earth is staying up on station.

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