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I don't understand it, could you please explain it better?
Originally posted by poet1b
The study describes exactly what most of us observe in our recognition that we are not seeing debri floating just outside of the shuttle in this video.
Originally posted by poet1b
In the first minute and a half of the tether video, there are no particles.
Originally posted by poet1b
reply to post by ArMaP
In the first minute and a half of the tether video, there are no particles. We don't see a discharge of particles appear, that then slowly decay, as with a water dump. If a dump had occurred after the first minute and a half, we would see a large discharge of several hundred particles, we don't see that.
What it shows to me, is that there's no sunlight, as confirmed by the audio.
I guess that means that's the right report, and this must be the chart you are talking about.
Originally posted by poet1b
The article gives a chart that shows that the particles from a dump essentially disappear in about ten minutes, with about 5 particles in the frame after ten minutes, and at that time they aren't moving around. After twenty minutes only one or two particles were in the frame.
They also say in that report that the position of the shuttle changed the way the particles would appear on screen, and that the water dump for that chart was made from the opposite side of the shuttle.
In the first minute and a half of the tether video, there are no particles. We don't see a discharge of particles appear, that then slowly decay, as with a water dump. If a dump had occurred after the first minute and a half, we would see a large discharge of several hundred particles, we don't see that.
During the 15 min prior to satellite launch, the optical environment was the worst for the entire mission.
In Figure 3 there are two clear periods when particles were observed: just after the manouvering was completed and just after orbital sunrise. Note there is no corresponding feature at sunset. The illumination conditions are quite constant so that the fluctuations in the particle counts after sunrise should be real. Several very different trajectories were observed. (A nose-to-tail direction of motion should have been favored due to drag.) Because the bay was not illuminated during this period (shadowed by cabin), the observed particles may have arisen from very different parts of the orbiter.
I have thought about that, and the fact that there are several "versions" of the video does not help, one of those even looks like it has a fade out/fade in from one scene to the other, and that was one of the reasons I asked for a new, complete version of the video, but secretnasaman must have me on a digital or on a psychological ignore and haven't answered even one of my posts.
Originally posted by easynow
wouldn't that mean either the objects are self illuminated or the video has been spliced or edited ?
Originally posted by ArMaP
I have thought about that, and the fact that there are several "versions" of the video does not help, one of those even looks like it has a fade out/fade in from one scene to the other, and that was one of the reasons I asked for a new, complete version of the video,
Originally posted by easynow
wouldn't that mean either the objects are self illuminated or the video has been spliced or edited ?
A t several times during the mission, groups of particles were observed within the field-of-view for several sets of exposures. Groups of -75 particles were observed to be in the same relative positions in frames taken 2 min apart. One particle took 8 min t o traverse the field-of-view. These nearly immobile particles were observed in several different attitudes including the velocity vector across the bay (so that the entire column in the field-of-view
was subjected to atmospheric drag) and even when the bay was in ram. Because several of these particles had clear disks they were not on the camera lens but rather quite remote, >10 m. Based on drag calculations they must have been quite large (larger than cm diameters) in order to persist with negligible motion in the field-of-view, We can offer no better explanation a t this
time.
Originally posted by poet1b
We see zero particles, and then we see numerous particles that do not go away.
Larger than cm diameters leaves the size concept fairly vague. I am not sure if they mean that these particles are larger than 1 cm, or large enough that they would be measured in meters, not cm. It seems that the latter is what is being alluded to.
quite large (larger than cm diameters)
Originally posted by poet1b
What ever the attitutde of the shuttle in the chart where the particles were observed, you still have hundreds of particles that then dropped to less than ten in a matter of minutes. We do not see this in the tether video. We see zero particles, and then we see numerous particles that do not go away.
We see nothing in this video that matches what is described as having occurred during a water dump.
Also note that in the second chart, there are zero particles observed at sunset and sunrise.
In Figure 3 there are two clear periods when particles were observed: just after the maneuvering was completed and just after orbital sunrise.
In addition, the shuttle isn't making any maneuvers in the video.
This video footage was taken three days after the satellite launch, so that eliminates particles from the actual launch being directly around the shuttle.
It has long been known that activities such as water dumps generate copious ice particles, but in this paper we report that a whole range of events such as crew activities and engine firings can shake loose or produce particles detectible to sensitive astronomical instruments.
The PACS data in conjunction with other orbital data bases have been used to create the framework model of the Shuttle environment. Excluding orbiter activities (dumps, thruster firings) the clearing time for the environment appears to have characteristic clearing times (e-fold) of 5 hr in a solar inertial attitude, and of 11 days for a variable attitude mission. The solar induced particle cloud produces 100 particles sr-1 during a 10-min period. The clearing time (e-fold) following a water dump is 2 to 10 min depending on attitude .On average there were 8 particles sr-1 s-1 larger than 40 um surrounding the Shuttle during the middle of mission.
I don't see the logic on continuing to insist that we are seeing something which does not look like anything reported in this NASA study except for one thing.
A t several times during the mission, groups of particles were observed within the field-of-view for several sets of exposures. Groups of -75 particles were observed to be in the same relative positions in frames taken 2 min apart. One particle took 8 min to traverse the field-of-view. These nearly immobile particles were observed in several different attitudes including the velocity vector across the bay (so that the entire column in the field-of-view was subjected to atmospheric drag) and even when the bay was in ram. Because several of these particles had clear disks they were not on the camera lens but rather quite remote, >10 m. Based on drag calculations they must have been quite large (larger than cm diameters) in order to persist with negligible motion in the field-of-view, We can offer no better explanation at this time.
So they are seeing stuff up there they can't explain.
Larger than cm diameters leaves the size concept fairly vague. I am not sure if they mean that these particles are larger than 1 cm, or large enough that they would be measured in meters, not cm. It seems that the latter is what is being alluded to. If we are talking about particles large enough to be measured in meters, and this study does leave the concept open, then clearly this is not debris from the shuttle.
I am not claiming that it was a water dump, I am only saying that we should not disregard that possibility without any real data about those actions, specially considering that there is a relatively small time frame in which the ice from a water dump would be present in large numbers.
Originally posted by poet1b
To keep claiming it was a water dump when there is no evidence of such a water dump is ignoring the evidence.
He only uses centimetres in that occasion and when saying that some particles were estimated as being in the mm-cm radius size range, so I guess that is what he really was talking about, less than 10 cm particles. And I wouldn't call something with 10 cm a particle, that is big enough to be called an object, at least in my unscientific point of view.
A 10 cm measure is in cm. The author of the article uses micro m, mm, cm, m and km. I see no special classification of 10cm as being distinct from cm diameters.
There's less evidence for the existence of living plasma creatures, and I also consider it, I try to consider all possibilities.
Originally posted by poet1b
BUT THERE IS NO EVIDENCE WHATSOEVER OF A WATER DUMP
No, because they look exactly like small objects closer to the camera, so even if they are not ice crystals or other debris from the shuttle and they are real UFOs or plasma creatures, I can only see signs that they are small and close to the camera.
The only reason I could think of is that the water dump theory is the last thread to cling to before admitting that these are UFOs floating around the tether, or at least can't be explained as particles close to the shuttle.
Almost.
Are you making fun of my American lack of usage of the metric system?
Yes, I thought of that, but I hope they know what they are talking about, after they are supposed to be scientists.
You might want to consider, also, this is an American using the metric system in this study.