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Planned and actual locations of spacecrafts landings
by
anik
on 18 Oct, 2009 08:00
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I have made
map in Google Maps and
file for Google Earth with planned and actual locations of landings of Soyuz spacecrafts beginning from Soyuz TM-12.
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#1
by
Stan Black
on 18 Oct, 2009 12:17
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I have made map in Google Maps and file for Google Earth with planned and actual locations of landings of Soyuz spacecrafts beginning from Soyuz TM-12.
Nicely done...
The three ballistic TMA are easy to find...
That main cluster, wonder if that will affect property prices.
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#2
by
anik
on 18 Oct, 2009 15:13
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I have added into map and file actual locations of landings of Soyuz-1, Soyuz-11, Soyuz-18-1, Soyuz-19 and from Soyuz-25 to Soyuz-34.
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#3
by
glanmor05
on 18 Oct, 2009 15:29
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Love maps like this. Thanks for posting.
Prompts a question. There are some fairly large bodies of water on that map.
What happens if they land in there (apart from the splash, obviously)?
and in order to avoid that, is there any ability to steer (or even see where to steer to) flowing shoot deploy?
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#4
by
Stan Black
on 18 Oct, 2009 16:21
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#5
by
glanmor05
on 18 Oct, 2009 16:24
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Love maps like this. Thanks for posting.
Prompts a question. There are some fairly large bodies of water on that map.
What happens if they land in there (apart from the splash, obviously)?
and in order to avoid that, is there any ability to steer (or even see where to steer to) flowing shoot deploy?
http://en.wikipedia.org/wiki/Soyuz_23
http://www.videocosmos.com/soyuz23.shtm
Wow, great story. Thanks for the reply.
Shows how little I know.
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#6
by
TJL
on 05 Dec, 2009 22:40
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Great map, Anik.
Speaking of Soyuz landings, prior to TMA 15, which was the last Soyuz to come to rest on its heat shield (not on its side)?
Thanks!
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#7
by
hop
on 05 Dec, 2009 22:50
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Great map, Anik.
Speaking of Soyuz landings, prior to TMA 15, which was the last Soyuz to come to rest on its heat shield (not on its side)?
Nitpick: TMA 15 landed upright, but the heat shield is jettisoned long before landing.
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#8
by
Gorizont
on 06 Dec, 2009 06:46
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Great story of the Soyuz-23 landing! Thanks for that!
greetings...
Soeren
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#9
by
TJL
on 06 Dec, 2009 19:21
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That's right...thanks for the correction, hop.
Do you happen to know which Soyuz prior to TMA-15 landed upright?
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#10
by
Comga
on 11 Dec, 2010 19:23
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Just found this (one year later) and think it is terrific. Thank you.
Do you have a statistical analysis of the dispersion, the RMS offset?
The map shows the TMA-16 landing "pin" in or on a 3-5 km lake, but TM-23 landing marked in a field. Soyuz 23 was the one that landed in Lake Tengiz, but I see no pin on a lake marked Tengiz in Cyrillic in Google Maps. Am I mistaken?
Some target points are near the shores of various lakes. After Soyuz-23 one would think they would give wide margin to bodies of water.
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#11
by
hop
on 11 Dec, 2010 21:39
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Here's the kmz file (as of Dec 11) converted to a CSV for anyone who's interested.
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#12
by
AnalogMan
on 12 Dec, 2010 01:48
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For interest I plotted differences between actual and planned landing positions (in km) for TM-12 to TM-34 and TMA-2 to TMA-19 (excluding outliers TMA-1, TMA-10 and TMA-11) , and also a quick histogram of distance between actual and planned. There is some interest in the SpaceX threads on this topic.
Excluding outliers (all in km):
average 13.1
minimum 2.7
maximum 49.7
median 9.6
stdev 10.1Thanks to Anik for the original data, and Hop for providing it in easy to use form.
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#13
by
hop
on 12 Dec, 2010 02:38
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Nice. Looks like ~5km SW "Kentucky windage" is in order
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#14
by
Comga
on 13 Dec, 2010 01:53
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I have a very similar bar chart, AnalogMan.
The first plot is fascinating. They are mostly to the East, and preferentially to the North.
I might try to redo the second plot if, from the first plot, we assume a deterministic offset of 9 km East and 2 km North.
I noticed something odd in the data. Until TM-27, all data is in integral units of minutes of latitude and longitude. After that, the "planned" remain rounded but the "actuals" are usually in integral units of seconds of latitude and longitude. Sometimes they have more resolution than that, but for this calculation that doesn't matter. That is, the "planned" locations have random errors due to round-off, on the order of 1 km, with an expected value about half that.
I do not believe that this is significant to the statistics in question. Random single kilometers when most offsets are 10 km or over, should not matter. The minimum offset of 2.7 km is not due to round-off. However I am rusty on my stats and would appreciate correction by anyone who is not.
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#15
by
Lars_J
on 13 Dec, 2010 03:18
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I have a very similar bar chart, AnalogMan.
The first plot is fascinating. They are mostly to the East, and preferentially to the North.
That's probably because the way the orbital track is lined up for deorbits. (going from south-west to north-east). This would seem to imply that most Soyuz landings overshoot their target.
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#16
by
anik
on 14 Dec, 2010 19:45
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The map shows the TMA-16 landing "pin" in or on a 3-5 km lake, but TM-23 landing marked in a field. Soyuz 23 was the one that landed in Lake Tengiz, but I see no pin on a lake marked Tengiz in Cyrillic in Google Maps. Am I mistaken?
Soyuz-23 and Soyuz TM-23 are different spacecrafts.
I noticed something odd in the data. Until TM-27, all data is in integral units of minutes of latitude and longitude. After that, the "planned" remain rounded but the "actuals" are usually in integral units of seconds of latitude and longitude
Planned coordinates are always given in rounded minutes. Actual coordinates can be rounded to minutes or have seconds - it depends on equipment used for determination of coordinates. Now we are using GPS data for determination so coordinates have seconds.
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#17
by
Comga
on 26 Jan, 2011 21:34
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Soyuz-23 and Soyuz TM-23 are different spacecrafts.
My mistake.
Target coordinates before TM-12, and either target or actual for most of the predeceding landings, are not available?
Thanks again. This is great information.
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#18
by
anik
on 28 Jan, 2011 08:17
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Target coordinates before TM-12, and either target or actual for most of the predeceding landings, are not available?
Yes, all what I know is in the file.
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#19
by
simonbp
on 28 Jan, 2011 17:56
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