Author Topic: Soyuz MS-03 EOM Events (Undock, Entry, Landing) - June 02, 2017  (Read 32520 times)

Offline centaurinasa

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As Nicolas Pillet say:
"The use of gamma ray altimeter is made essential to satisfy the double requirement of precision and versatility that the "Kaktus" system must have. To cite only two examples, a radio wave system would not be accurate enough, and a laser system would not work in case of clouds"
http://www.kosmonavtika.com/vaisseaux/soyouz/tech/ksp/ksp.html

The gamma-ray sources are used as "transmitters" for the backscatter 'altimeter' that triggers the soft-landing retro-rockets.
« Last Edit: 06/02/2017 05:15 pm by centaurinasa »
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Offline centaurinasa

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"The goal of "Kaktus" gamma-ray altimeter (GLV, Гамма-Лучевой Высотомер) is to trigger the ignition of soft landing engines (DMP) when the Descent module reach the altitude of 80 cm" (Nicolas Pillet)
« Last Edit: 06/02/2017 05:41 pm by centaurinasa »
To boldly go where no human has gone before !

Offline FutureSpaceTourist

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ESA has posted a number of hi-res photos:
https://www.flickr.com/photos/europeanspaceagency/sets/72157684574579975/

A selection attached.

Offline centaurinasa

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Seems close to a water area... (and thanks for the link, FutureSpaceTourist  8) )
« Last Edit: 06/02/2017 05:54 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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The crew just arrived a few minutes ago, for a short welcoming ceremony (as usual) in Karaganda
« Last Edit: 06/02/2017 06:20 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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To boldly go where no human has gone before !

Offline centaurinasa

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To boldly go where no human has gone before !

Offline Star One

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As Nicolas Pillet say:
"The use of gamma ray altimeter is made essential to satisfy the double requirement of precision and versatility that the "Kaktus" system must have. To cite only two examples, a radio wave system would not be accurate enough, and a laser system would not work in case of clouds"
http://www.kosmonavtika.com/vaisseaux/soyouz/tech/ksp/ksp.html

The gamma-ray sources are used as "transmitters" for the backscatter 'altimeter' that triggers the soft-landing retro-rockets.

Thank you. I must have missed that in the last book I read about Soyuz so thanks.

Offline FutureSpaceTourist

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Quote
New Pic11 - Landing of #ISS #Exp50 #SoyuzMS03 crew Oleg Novitsky and @Thom_astro FIREBALL!

https://twitter.com/shuttlealmanac/status/870806639351287808

Offline vineethgk

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Seems close to a water area... (and thanks for the link, FutureSpaceTourist  8) )
Would have been a little mess if it landed there! ;-)

Offline centaurinasa

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... I must have missed that in the last book I read about Soyuz so thanks.
Bought this one few years ago...
To boldly go where no human has gone before !

Offline centaurinasa

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...Would have been a little mess if it landed there! ;-)
As Soyuz 23 in October 1976.... (in a more "difficult" version ....)

« Last Edit: 06/03/2017 06:21 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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Crews training in case of an emergency splashdown
To boldly go where no human has gone before !

Offline Joachim

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It seems that the exactly landing time needs a correction.
Please have a look to the EXIF data of this photo:
https://www.flickr.com/photos/roscosmos/34270073904/in/dateposted/
It was taken at 14:10:01 UTC. This must be the correct landing time.

Online Steven Pietrobon

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It seems that the exactly landing time needs a correction.
Please have a look to the EXIF data of this photo:
https://www.flickr.com/photos/roscosmos/34270073904/in/dateposted/
It was taken at 14:10:01 UTC. This must be the correct landing time.

Off course, that's assuming the clock in the camera was correct!
« Last Edit: 06/06/2017 05:34 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Joachim

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How can a guy watching NASA TV know the landing time only four minutes after touchdown?
The touchdown was not shown because it happened behind a hill.
And: Every TV signal needs seconds (depends on the way - cable, satellite or Internet) until it is displayed.

Offline Phillip Clark

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Have the landing co-ordinates been published, please?
I've always been crazy but it's kept me from going insane - WJ.

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