Author Topic: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)  (Read 47703 times)

Offline satwatcher

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #200 on: 06/10/2016 04:01 PM »
First elements of the payload have been published showing it in the super-synchronous transfer orbit.
INTELSAT 31 [41581/16035A]  3365km x 65063km @ 29.57 deg

The intended orbit was 3503km x 65000km @ 29.6 deg (per russianspaceweb.com).

Offline input~2

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #201 on: 06/10/2016 04:34 PM »
[email protected] minutes ago
More on Intelsat 31-Proton Breeze M achieves a precise injection orbit of 3428 x 64964 km inclined 29.53 degrees, within 1.1 m/s of target.

Online edkyle99

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #202 on: 06/10/2016 08:27 PM »
A solid result, and a hint that Proton Phase 4 has more performance in her.  This was likely the second "close call" this year among all of the world's launch vehicles.  I wonder if Briz M was able to perform its post-separation burns as planned. 

 - Ed Kyle

Offline a_langwich

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #203 on: 06/10/2016 08:38 PM »
A solid result, and a hint that Proton Phase 4 has more performance in her.  This was likely the second "close call" this year among all of the world's launch vehicles.  I wonder if Briz M was able to perform its post-separation burns as planned. 

 - Ed Kyle

Maybe SpaceX is reserving 30% margin for reusability, while ILS/Proton is reserving 30% margin for anomalies.   ;D

More seriously, congrats to ILS and Proton, good news is very welcome.

Offline jcm

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #204 on: 06/10/2016 11:30 PM »
A solid result, and a hint that Proton Phase 4 has more performance in her.  This was likely the second "close call" this year among all of the world's launch vehicles.  I wonder if Briz M was able to perform its post-separation burns as planned. 

 - Ed Kyle

Yes, Briz in 1829 x 63713 km x 31 deg so it did make a significant post-sep burn.
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Offline jcm

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #205 on: 06/10/2016 11:33 PM »
According to this official image http://coopi.khrunichev.ru/download/2016/is31/activn_0000.png , Proton-M velocity at third stage cutoff was 28 m/c less than nominal which easily explains Briz-M overburn.



Igor  - do you know the intended stage 3  perigee/apogee?  Probably about -500 x 170 as usual?
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Online Liss

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #206 on: 06/11/2016 05:08 AM »
According to this official image http://coopi.khrunichev.ru/download/2016/is31/activn_0000.png , Proton-M velocity at third stage cutoff was 28 m/c less than nominal which easily explains Briz-M overburn.



Igor  - do you know the intended stage 3  perigee/apogee?  Probably about -500 x 170 as usual?
Don't know unfotunately but I believe planned velocity at separation was 7307 m/s.
This message reflects my personal opinion based on open sources of information.

Offline vapour_nudge

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #207 on: 06/11/2016 06:37 AM »
....  This was likely the second "close call" this year among all of the world's launch vehicles.....

 - Ed Kyle

Ed, I make it three. The March Atlas with OA-6, the late May Soyuz GLONASS launch and this one as close calls


Online Chris Bergin

ILS with a "nothing to see here, move along" statement?

The following is a statement from International Launch Services (ILS) and Khrunichev State Research and Production Space Center (Khrunichev) on the ILS Proton Breeze M launch of the Intelsat 31 satellite on June 9, 2016 from the Baikonur Cosmodrome:

The ILS Proton Breeze M launch vehicle successfully delivered the Intelsat 31 spacecraft to its Super Synchronous Transfer Orbit on June 9. Both ILS and Khrunichev confirm that the flight path was within requirements with a precise satellite injection orbit of 3428 x 64,964 km, inclined 29.53 degrees and within 1.1 m/s of the target, well within Interface Control Document (ICD) requirements. Telemetry data is currently being processed.

Online zubenelgenubi

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #209 on: 06/13/2016 05:55 PM »
ILS with a "nothing to see here, move along" statement?

The following is a statement from International Launch Services (ILS) and Khrunichev State Research and Production Space Center (Khrunichev) on the ILS Proton Breeze M launch of the Intelsat 31 satellite on June 9, 2016 from the Baikonur Cosmodrome:

The ILS Proton Breeze M launch vehicle successfully delivered the Intelsat 31 spacecraft to its Super Synchronous Transfer Orbit on June 9. Both ILS and Khrunichev confirm that the flight path was within requirements with a precise satellite injection orbit of 3428 x 64,964 km, inclined 29.53 degrees and within 1.1 m/s of the target, well within Interface Control Document (ICD) requirements. Telemetry data is currently being processed.

Anatoly's web site has this note on the Intelsat-31 launch page:
Quote
Investigation into the close call launch begins

Following the successful release of the Intelsat-31 satellite, Russia formed an accident commission to investigate the circumstances of a close call during the operation of the second stage's propulsion system and to develop corrective actions as necessary, industry sources said.

(Details to come)
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Offline Stan Black

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #210 on: 06/18/2016 03:59 PM »
ILS with a "nothing to see here, move along" statement?

The following is a statement from International Launch Services (ILS) and Khrunichev State Research and Production Space Center (Khrunichev) on the ILS Proton Breeze M launch of the Intelsat 31 satellite on June 9, 2016 from the Baikonur Cosmodrome:

The ILS Proton Breeze M launch vehicle successfully delivered the Intelsat 31 spacecraft to its Super Synchronous Transfer Orbit on June 9. Both ILS and Khrunichev confirm that the flight path was within requirements with a precise satellite injection orbit of 3428 x 64,964 km, inclined 29.53 degrees and within 1.1 m/s of the target, well within Interface Control Document (ICD) requirements. Telemetry data is currently being processed.

Well nothing was said after the launch of AMC23 and that one too had a problematic second stage engine, according to the manufacturer KBKhA.
http://www.ilslaunch.com/node/497
Quote
Разработка и реализация мероприятий а связи с имевшимся случаем самопроизвольно-го, скачкообразного снижения до 51% режима работы двигателя РД-0211 №5355365421 при пуске РН Протон-М №535-13.
http://www.kbkha.ru/userfiles/file/god_otchet/otchet_OSC_KBKhA_2005.doc

Online zubenelgenubi

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Re: LIVE: Proton-M/Briz-M Intelsat-31 June 9, 2016 (07:10 UTC)
« Reply #211 on: 08/02/2016 01:44 PM »

Anatoly's web site has this note on the Intelsat-31 launch page:
Quote
Investigation into the close call launch begins

Following the successful release of the Intelsat-31 satellite, Russia formed an accident commission to investigate the circumstances of a close call during the operation of the second stage's propulsion system and to develop corrective actions as necessary, industry sources said.

(Details to come)

Confirmation that investigation is occurring and ongoing:
Investigation into upper stage glitch delays next Proton launch

Also, the investigation is the reason for the substantial delay of the next Proton/ILS launch.
« Last Edit: 08/02/2016 01:45 PM by zubenelgenubi »
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