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 Forum index » Diversions » Perplex City Puzzle Cards » PXC: Purple Puzzle Cards
[PUZZLE] #172, Lower Right Purple Hex: Freefall (E3)
Moderators: AnthraX101, bagsbee, BrianEnigma, cassandra, Giskard, lhall, Mikeyj, myf, poozle, RobMagus, xnbomb
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BrianEnigmaModerator
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Re: [PUZZLE] #172, Lower Right Purple Hex: Freefall (E3)

Kalt wrote:
Blue is Saturn, Yellow is Jupiter, Red is Mars, Green is Mercury, and Purple is Venus.

I had a hard time believing yellow could be Jupiter, as its orbit seemed pretty darn erratic. I decided to look up some orbit information and had a serendipitous find. A certain collection of pages had graphs of planetary orbits from the point of view of a stationary Earth--in effect, the orbit of the Earth around the sun and the orbit of each planet around the sun would combine to form a Spirograph-like shape with Earth as a stationary dot in the center. For instance, Jupiter looks like this:

Venus looks like this:

The rest of the images and text can be found at: http://zebu.uoregon.edu/~soper/Orbits/

I am still not convinced the dots on the card are planets, as they do not look like they sync up, even with a pretty big margin of error.
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PostPosted: Mon May 23, 2005 2:45 pm
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HitsHerMark
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Showing the image to somebody I know who's big into the Telecommunications industry, he said that the red and light blue/white dots close into the planet could be Iridium or GlobalStar satellites.
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PostPosted: Mon May 23, 2005 2:56 pm
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Scott
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J-track is awesome Smile been a fFan fFor years, if only cos it's a fFun toy.
I wish i'd seen this card sooner, being a satellite buff.
Anyway, I observe the exact answer to the exact question being asked:
Spoiler (Rollover to View):
Yes.

Here's how i arrived at that answer:
Spoiler (Rollover to View):
The card asks "Can you name the coloured satellites shown here?" I took a look and mmediately thought "well, sure I can. Or at least guess at which systems are being represented." The ones we're all agreeing might be iridium might also be one of a fFew other systems. It's just a model. So I'm gonna answer the basic question posed, in good rhetorical fFashion: Yes. Yes I can name them.

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PostPosted: Tue May 24, 2005 1:32 am
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Kalt
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Seej: ^J^ and my reasoning had a few more quirks I neglected to mention, which is why I still feel it makes sense.

The card does not state that the satellites have to be orbitting the Earth; we're definitely aware that the planets orbit the Sun. What I was trying to state was that only the outer limit of each constellation of satellites would determine its position in orbit; the outer limit of Saturn's ring is much farther out than that of Jupiter, which is farther out than Mars. If the picture of Earth follows the same logic, only its outer edge matters--And its outer edge is just within the orbit of Mars, and outside the orbit of Venus and Mercury. For this reasoning to be in effect, the Sun must be in the center of the card, and not shown (Which makes sense, because the Sun's circular movement is negligible in the puzzle card's context, and so showing it at all would imply it had an orbit).

In other words, in the tentative solution we put forth, the planets' orbits are not relative to the Earth, but to the Sun. The picture of the Earth is there to be misleading, when really, we can treat it just like another constellation of satellites.


This is just one potential solution we're putting forth. ^J^ and I feel that the other main solution asserted in this thread, with artificial satellites and their relative positions to Earth, is also a very viable solution. I just feel our solution works a little too well just to let go; perhaps it was intended for this puzzle to have multiple solutions?

Wishful thinking, maybe, but potentially possible.

-Kalt

PostPosted: Tue May 24, 2005 8:02 am
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Mima
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Kalt, sorry to put a negative to your solution, but night and day are shown by a shadow on the surface of the earth, how could this be possible if the sun was in the middle of the picture, surely either we would have to be seeing full day or full night?

PostPosted: Tue May 24, 2005 11:36 am
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Seej
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The original text from the puzzle was:

Quote:
"There are over 2000 artificial satellites orbiting Earth. Can you name the coloured satellites shown here? The blue, yellow, and red dots are all constellations of satellites, while the green and purple dots are individual satellites."


The planets can't possibly form a constellation by themselves since the word constellation implies an arrangement of more than one object in the sky.

I see where you're coming from Kalt, but personally I feel like you're reaching too hard for the answer. There are definitely satellites in the arrangements and relative distances from Earth shown in the image. Our main problem is that there's so many it's tricky to know which one is which (well, aside from the GPS satellites as there's no other constellations of that size at that altitude).

Take a look at the java applet in the NASA link Mima provided - it lets you check pretty much every major satellite up there and it's orbit.

Having done that I think the purple one is HST and the green one is ERBS as both the orbits seem to fit.

EDIT: added screendumps to show why it think it's HST and ERBS (sorry about the poor quality - no GIMP on this computer)

EDIT2: HST is The Hubble Space Telescope. ERBS is The Earth Radiation Budget Satellite. Given how well known Hubble is and how many other individual satellites are orbiting at similar altitudes, I'm confident that the purple one is indeed Hubble. I'm less confident about ERBS but maybe I'm just paranoid
HST_sat_orbit_screendump.jpg
 Description   HST orbit
 Filesize   70.58KB
 Viewed   375 Time(s)

HST_sat_orbit_screendump.jpg

ERBS_sat_orbit_screendump.jpg
 Description   ERBS orbit
 Filesize   70.42KB
 Viewed   206 Time(s)

ERBS_sat_orbit_screendump.jpg


PostPosted: Tue May 24, 2005 12:33 pm
Last edited by Seej on Tue May 24, 2005 12:51 pm; edited 2 times in total
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HitsHerMark
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The card mentions "constilation satelights", and the yellow dots indicate movement. So I'd have to agree that those dots indicate the movement of constilations in the sky.
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PostPosted: Tue May 24, 2005 12:40 pm
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Leeravitz
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Sorry. Am I being dense here, but from a distance, it looks to me like the different satellite groupings are demarcated pretty clearly. There are lots and lots of red satellites, blue satellites and yellow satellites. The red ones are tightly clustered in a near earth orbit, the blue ones are slightly wider spread and somewhat further out, the yellow ones are miles away and all over the place. There does, indeed, seem to be only one significant orbit for both the green and the purple dot.

I see no reason to believe that separate points of light of the same colour are *not* intended to represent separate satellites (however approximately). I can see that there is an argument for suggesting that, overall, the points represent a wider, singular orbit at different stages, but, frankly, that interpretation does seem to ignore the specificity of the question.
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PostPosted: Tue May 24, 2005 3:06 pm
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tanner
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a set of satellites such as iridium or gps ect are known as constellations even tho they dont resemble steller constellations
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PostPosted: Tue May 24, 2005 3:51 pm
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sixsidedsquare
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i'd say the green one is closer to TRMM or SWAS

PostPosted: Tue May 24, 2005 10:05 pm
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kierenj
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*guesses* the answer is 'no' Wink

PostPosted: Wed May 25, 2005 3:59 am
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sixsidedsquare
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now that'd just be cheeky

PostPosted: Wed May 25, 2005 4:20 am
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Mima
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Summary of current suggestions:
Blue - Intelsat/VSAT/Astrolink
Yellow - GPS BIIA
Red - Iridium/Cosmos/Teledesic/GlobalStar
Green - International Space Station/Halley Telescope/ERBS/TRMM/SWAS
Purple - International Space Station/Halley Telescope/XTE/HST

Kalt thinks that time/date is:
Quote:
The time is around 8-10AM PST, 11AM-1PM EST, or 4-6PM GMT (I believe) around the Winter Solstice. The sun is rising about two time zones west of Pacific, and the sun is around 30 degrees south of the equator (At least, a decent angle south, enough to make it deep into Winter).


From what little I have managed to cram into my head over the last few days about satellites, the time, date and year all dictate where over the globe the satellites are orbiting. If we don't have these details, surely it is technically impossible to identify green & purple for cetain?

This leaves only one that is agreed upon, yellow, which means that kierenj might just be right, and that it is not possible to get to an answer.

Please will someone tell me it is, and how???

PostPosted: Wed May 25, 2005 4:54 am
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NovacaineX
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I'm pretty sure the only way to get the answer is to use the software i posted earlier which is named Freefall. I am installing it now that i am at home on my mac, I'll post what i can.

EDIT: Hmm.. I set the date to sometime in december, and the light looks about right. The time appears to be around 11am est. But there are literally thousands of sattelites in this program. This is gonna take alot of narrowing down.

EDIT2:

1 down, 4 to go.

Green is officially TRMM.

Heres a screenshot
TRMM.jpg
 Description   
 Filesize   77.17KB
 Viewed   186 Time(s)

TRMM.jpg


PostPosted: Wed May 25, 2005 5:03 am
Last edited by NovacaineX on Wed May 25, 2005 6:10 am; edited 1 time in total
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Mima
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NovacaineX wrote:
I set the date to sometime in december, and the light looks about right. The time appears to be around 11am est.
Green is officially SWAS.
Heres a screenshot


No screen shot!
Couple of questions: Using the NASA applet, SWAS doesn't come close, so the time & date & year are crucial. What happens to the track if you change the time by a couple of hours, or the date, or the year?

Does it still give you SWAS??

PostPosted: Wed May 25, 2005 6:09 am
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