Author Topic: LIVE: Zenit-3F/Fregat-SB - Angosat-1 - December 26, 2017 (19:00 UTC)  (Read 52816 times)

Online Alter Sachse

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Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #20 on: 11/24/2017 10:50 AM »
https://www.energia.ru/ru/news/news-2017/news_11-24.html

Google translation:
The work is continuing to prepare for launching the spacecraft "Angosat" from the space center "Baikonur", manufactured in RSC Energia (included in the GC "ROSKOSMOS), commissioned by the Ministry of Telecommunications and Information Technology of the Republic of Angola. The spacecraft is intended to provide communication and television broadcasting in the territory of the Republic of Angola, as well as the entire African continent.

The work is carried out by specialists of the Energia Corporation and other co-executing companies.

Checking the lithium-ion batteries of the spacecraft after transportation is completed, the final operations with the Zenit-2 carrier rocket after electrical checks were carried out. In addition, the transit electric circuits were tested. Work has also been done on the Fregat-SB overclocking unit to eliminate inconsistencies in the fuel line.

The launch of the spacecraft "Angosat" is scheduled for December 26, 2017.

Offline russianhalo117

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Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #21 on: 11/30/2017 11:17 PM »
UPDATE: Russian Launch Schedule: Change: The following flight has been cleared to proceed as originally scheduled because the Fregat guidance failure mode can only repeat itself when launched from Vostochny.

2017:
December 26 - AngoSat - Zenit-3SLBF/Fregat-SB (xxx/2006) - Baikonur, LC45/1 (or Early 2018)

http://russianspaceweb.com/meteor-m2-1.html#1130
Quote
...

New details emerge on the Soyuz failure

The complex failure scenario of the second Soyuz rocket launch from Vostochny continued emerging in the days following the accident. Although the culprit had quickly been pinned down by flight control specialists, even seasoned space engineers, who were not directly involved in the intricacies of guidance systems, struggled to fully comprehend the bizarre nature of the accident.

In the Soyuz/Fregat launch vehicle, the first three booster stages of the rocket and the Fregat upper stage have their two separate guidance systems controlled by their own gyroscopic platforms. The guidance reference axis used by the gyroscopes on the Soyuz and on the Fregat had a 10-degree difference. The geographical azimuth of previous Soyuz/Fregat launcher from Baikonur, Plesetsk and Kourou normally laid within a range from positive 140 to negative 140 degrees. To bring the gyroscopic guidance system into operational readiness, its main platform has to be rotated into a zero-degree position via a shortest possible route. The azimuth of the ill-fated Vostochny launch was 174 degrees, and with an additional 10 degrees for the Fregat's reference axis, it meant that its gyro platform had to turn 184 degrees in order to reach the required "zero" position.

In the Soyuz rocket, the gyro platform normally rotated from 174 degrees back to a zero position, providing the correct guidance. However on the Fregat, the shortest path for its platform to a zero-degree position was to increase its angle from 184 to 360 degrees. Essentially, the platform came to the same position, but this is not how the software in the main flight control computer on the Fregat interpreted the situation. Instead, the computer decided that the spacecraft had been 360 degrees off target and dutifully commanded its thrusters to fire to turn it around to the required zero-degree position. After a roughly 60-degree turn, the gyroscope system on the Fregat stalled, essentially leaving the vehicle without any ability to orient itself in space.

....

Offline Galactic Penguin SST

Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #22 on: 12/16/2017 07:05 AM »
Roscosmos reported as recently as December 12 that this launch is not affected by the Fregat failure last month.

BTW, does anyone have the launch time for this one on December 26? Also, does S7's Space Transportation subsidiary have a dedicated website (since it looks like the Sea Launch one is already dead)?
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline russianhalo117

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Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #23 on: 12/16/2017 03:14 PM »
Roscosmos reported as recently as December 12 that this launch is not affected by the Fregat failure last month.

BTW, does anyone have the launch time for this one on December 26? Also, does S7's Space Transportation subsidiary have a dedicated website (since it looks like the Sea Launch one is already dead)?
I have not been able to locate their website. May be it will launch in the new year or there may never be one.
« Last Edit: 12/16/2017 03:25 PM by russianhalo117 »

Online Alter Sachse

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Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #24 on: 12/16/2017 05:08 PM »
https://sputniknews.com/russia/201712121059931063-fregat-upper-stage-satellites/

"According to Ivanov, the Fregat accident investigation would not affect the launch of the Zenit carrier rocket with Angola's first satellite AngoSat-1 on December 26, adding, however, that the third launch from Vostochny of the Soyuz-2.1a carrier rocket with Kanopus satellites would be postponed from December 22 to late January 2018"
(12.12.2017)
« Last Edit: 12/16/2017 05:09 PM by Alter Sachse »

Offline Mike Jones

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Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #25 on: 12/17/2017 02:24 PM »
http://s7space.ru

S7 Space does have a website. After Angosat flight by year end, Lybid should follow in 2018 from Baikonur. And then they are supposed to restart launches from Sea launch (odyssey platform) but they have no customers yet.

Offline input~2

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Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #26 on: 12/18/2017 12:17 PM »
Quote
The launch of Zenit-2SB / Fregat-SB and the Angosat spacecraft is scheduled for December 26, 2017 from launch pad 45 at Baikonur Cosmodrome

https://www.roscosmos.ru/24487/

I don't see a reference to S7 Space on the fairing
GGPEN is the Angolan operator "Gabinete de Gestão do Programa Espacial Nacional"
« Last Edit: 12/18/2017 12:18 PM by input~2 »

Offline Artyom.

Re: Zenit-3SLBF/Fregat - Angosat-1 - December 26, 2017
« Reply #27 on: 12/18/2017 12:39 PM »
BTW, does anyone have the launch time for this one on December 26?
≈ 19:00 UTC
« Last Edit: 12/18/2017 12:39 PM by Artyom. »
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Online Alter Sachse

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Offline Artyom.

"Earth is the cradle of humanity, but one cannot live in a cradle forever." - Konstantin Eduardovich Tsiolkovsky.

Online Alter Sachse

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« Last Edit: 12/21/2017 08:52 AM by Alter Sachse »

Offline Satori

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Home page of GGPEN at http://www.ggpen.gov.ao/

Offline Zenit3F

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Hello, does anyone have the flight profile for this mission or the launch details like how long through the flight the stages get separated etc.

Thank you

Offline russianhalo117

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РН «Зенит-2SБ» с КА «Ангосат». Работы в МИКе.

Offline input~2

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J8285/17 -  RESTRICTED AREA ACT: UNR1238. SFC - UNL, DAILY 1900-1945, 26 DEC 19:00 2017 UNTIL 29 DEC 19:45 2017. CREATED: 19 DEC 23:34 2017

J8277/17 -  ATS RTE SEGMENTS CLSD: B206 ARNUL - AKTAS, G489 TELRU - AKTAS. SFC - UNL, DAILY 1900-1945, 26 DEC 19:00 2017 UNTIL 29 DEC 19:45 2017. CREATED: 19 DEC 06:00 2017

Offline Steven Pietrobon

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Screen grab showing S7 Space logo on the vehicle.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Artyom.

The Zenit rocket on the pad.
"Earth is the cradle of humanity, but one cannot live in a cradle forever." - Konstantin Eduardovich Tsiolkovsky.

Offline FutureSpaceTourist

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Some different shots:

Quote
#Ангосат: 24 декабря на космодроме Байконур состоялся вывоз на стартовый комплекс площадки 45 ракеты-носителя «Зенит-2SБ» с разгонным блоком «Фрегат-СБ», предназначенной для вывода на орбиту космического аппарата «Ангосат». Пуск запланирован в 22:00 мск 26 декабря.

https://twitter.com/roscosmos/status/944902097790734336

Translation by bing:

Quote
#Ангосат: 24 December at the Baikonur cosmodrome on the removal took place pad launch complex 45 rocket "Zenit-2SB with a booster" block "Fregat-SB», intended for spacecraft orbit" Angosat. "Start scheduled in 22:00 MSK 26 December.

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