Author Topic: Soyuz-2.1b/Fregat - Glonass-K blok K4s - Plesetsk 43/4 - Oct 25 2020 (19:08 UTC)  (Read 23439 times)

Offline ChrisGebhardt

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Offline Steven Pietrobon

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Fregat has successfully separated.

https://www.militarynews.ru/story.asp?rid=1&nid=540583&lang=RU

"Navigation satellite "Glonass-K" with a booster unit separated from the launch vehicle after launch from Plesetska
25.10.2020 23:59:00
       Moscow. October 25. INTERFAX - The "Fregat" dispersal unit with the Glonass-K spacecraft has separated from the Soyuz-2.1b rocket launched from the Plesetsk Cosmodrome, according to the Russian Defense Ministry's Department of Information and Mass Communications."
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Spacecraft separation should be happening about now.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Mission success!

https://www.militarynews.ru/story.asp?rid=1&nid=540585&lang=RU

Navigation satellite "Glonass-K" successfully put into orbit
26.10.2020 1:58:00
       Moscow. October 26. INTERFAX - The "Fregat" dispersal unit successfully put the Glonass-K navigation satellite into the calculated orbit, according to the Russian Defense Ministry's Department of Information and Mass Communications.
...
Dmitry Rogozin said at the time that the share of domestic microelectronics used by Roscosmos in new satellites had increased from 53 to 80% since 2017.
« Last Edit: 10/25/2020 10:01 pm by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline jacqmans

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10/26/2020

Glonass-K satellite launched from Plesetsk cosmodrome

On Sunday, October 25, 2020, at 22:08 Moscow time from the Plesetsk cosmodrome in the Arkhangelsk region, the combat crew of the Space Forces of the Aerospace Forces launched the Soyuz-2 carrier rocket developed by the Progress RCC (part of the Roscosmos State Corporation) with a new generation spacecraft of the GLONASS system . The launch of the carrier rocket and the insertion of the spacecraft into the calculated orbit took place in the normal mode.

Two minutes after the launch, the Soyuz-2 launch vehicle was taken for escort by means of the ground-based automated control complex of the German Titov Main Testing Space Center. At the estimated time, the "Glonass-K" spacecraft was launched into the target orbit by the "Fregat" upper stage manufactured by NPO Lavochkin (part of the State Corporation "Roscosmos") and taken over to control ground assets of the Space Forces of the Aerospace Forces. A stable telemetric connection has been established and maintained with the satellite. The onboard systems of the Glonass-K spacecraft are operating normally.

The spacecraft launched into orbit, created by the "Information Satellite Systems" company named after academician M.F. Reshetnev "(included in the perimeter of the State Corporation" Roscosmos "), replenished the orbital constellation of the Russian Global Navigation Satellite System GLONASS. Currently, the orbital constellation includes 28 spacecraft, of which 24 are used for their intended purpose, two spacecraft are in the orbital reserve, one new-generation spacecraft "Glonass-K" is undergoing flight tests. Another spacecraft has been temporarily taken out for maintenance.

Today, the basis of the orbital constellation of the system is made up of the Glonass-M spacecraft, which demonstrate high reliability. Replacing the orbital constellation with Glonass-K spacecraft will ensure the stable operation of the Russian navigation system and increase the accuracy of its navigation determinations up to tens of centimeters.

Spacecraft "Glonass-K" are designed in a leaky design, have a guaranteed lifetime in orbit increased to 10 years, reduced power consumption, and significantly less weight. Unlike its predecessors, "Glonass-K" carry two types of navigation signals - frequency division and code division. In addition to their main functions, they will transmit information to the COSPAS-SARSAT international search and rescue system in distress .

https://www.roscosmos.ru/29474/

Offline jacqmans

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10/26/2020
Ground-based means of the Aerospace Forces took control of the satellite "Glonass-K"

Launched on  Sunday , October 25, 2020, at 22:08 Moscow time from the Plesetsk cosmodrome in the Arkhangelsk region, the Soyuz-2.1b medium-class carrier rocket developed by the Progress RCC with the Fregat upper stage produced by NPO Lavochkin at the set time successfully launched into orbit the Russian navigation spacecraft "Glonass-K".

The spacecraft, created by the "Information Satellite Systems" company named after academician M.F. Reshetnev "(included in the perimeter of the State Corporation" Roscosmos "), launched into the target orbit and accepted for control of ground-based facilities of the Main Testing Space Center named after G.S. Titov of the Space Forces of the Aerospace Forces. The launch of the Soyuz-2.1B launch vehicle and the launch of the Glonass-K spacecraft into orbit by the Fregat upper stage took place in the normal mode.

A stable telemetric connection has been established and maintained with the Glonass-K spacecraft. The onboard systems of the spacecraft are operating normally.

https://www.roscosmos.ru/29475/

Offline input~2

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2 objects have been cataloged

2020-075A/46805 in 19125 x 19151 km x 64.81 (S/C)
2020-075B/46806 in 19279 x 19680 km x 64.89 (Fregat)

Online Alter Sachse

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« Last Edit: 10/26/2020 02:14 pm by Alter Sachse »
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Offline jcm

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Space-Track is calling it Kosmos-2547. Has anyone seen this in Russian sources yet?
-----------------------------

Jonathan McDowell
http://planet4589.org

Offline B. Hendrickx

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Space-Track is calling it Kosmos-2547. Has anyone seen this in Russian sources yet?

No official confirmation of that so far. It will be interesting to see whether it will be called Kosmos-2547 or 2548. The name Kosmos-2547 could have been given to an object released from Kosmos-2543 last July and described by the US as a "high-speed projectile". A similar object released from Kosmos-2521 in October 2017 did get a Kosmos number (Kosmos-2523), but it is not yet clear if this happened this time as well. We should find out soon.

Offline SciNews

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Launch video with milliseconds launch time

Offline zubenelgenubi

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Do the launch pictures match to a launch from 43/4?
https://www.militarynews.ru/story.asp?rid=1&nid=540576&lang=RU
Quote
<snip>
"On Sunday, October 25, at 22 hours 08 minutes (Moscow time), from the launcher (PU) No. 4 of site No. 43 of the State Test Cosmodrome of the Ministry of Defense of the Russian Federation (Plesetsk cosmodrome) in the Arkhangelsk Region, the combat crew of the Space Forces of the Aerospace Forces carried out a successful launch of a medium-class carrier rocket (LV) "Soyuz-2.1B" with a navigation spacecraft (SC) "Glonass-K", the department said.
<snip>
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Offline gwiz

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Space-Track is calling it Kosmos-2547. Has anyone seen this in Russian sources yet?
http://www.sdcm.ru/smglo/grupglo?version=eng&site=extern

[zubenelgenubi: "Structure and status of GLONASS constellation" chart shows SV 2547 with launch date October 25, 2020.]
« Last Edit: 12/03/2020 05:50 am by zubenelgenubi »

Online Stan Black

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« Last Edit: 11/13/2020 07:34 pm by Stan Black »

Offline GWR64

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Change of plan! Glonass-K 705 has maneuvered.
Quote
COSMOS 2547 [GLONASS-K]
1 46805U 20075A   20334.13789961 -.00000010  00000-0  00000+0 0  9994
2 46805  64.7838 260.6119 0002552 302.8982  72.9029  2.12908554   737
Source Celestrak
It was released between operating points 10 and 11, and drifted so far towards point 10 to replace Glonass-M 723.
After the engine ignition, it now drifts in the opposite direction towards point 11. It is likely that Glonass-M 753 should now replace.

https://forum.nasaspaceflight.com/index.php?topic=34693.msg2156115#msg2156115

It was the 3rd or 4th attempt to replace the Glonass-M 723 (no more L2 signal). unbelievable  :o
2013?, 2016, 2019, 2020
« Last Edit: 11/29/2020 07:03 pm by GWR64 »

Offline GWR64

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Glonass-K 705 is now officially listed as satellite no. 11.
The status is flight tests. (the english page says maintenance, that's wrong)
It will reach working point 11 sometime in January.
I didn't figure it out exactly.
Until then he use channel -5. This will be switched to channel 0 later.

https://www.glonass-iac.ru/GLONASS/index.php
« Last Edit: 12/02/2020 05:44 pm by GWR64 »

Offline GWR64

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Glonass-K 705 has obviously maneuvered again.
Quote
COSMOS 2547 [GLONASS-K]
1 46805U 20075A   20338.49561973  .00000022  00000-0  00000-0 0  9991
2 46805  64.7842 260.4597 0008504   5.2123 107.0766  2.12679985   825
Source Celestrak

The orbit time is now 1.4 minutes (dec) longer than that of the constellation. He will reach point 11 this month.
From 01/10/2021 705 should be usable. At least says this the constellation status.

Offline GWR64

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So, according to NORAD TLE, the drift of Glonass-K 705 was stopped, the satellite has arrived at point 11.
I think commissioning will start soon.

Quote
COSMOS 2547 [GLONASS-K]
1 46805U 20075A   20357.39685554 -.00000029  00000-0  00000+0 0  9990
2 46805  64.7887 259.8221 0006323 253.3810 297.5202  2.13101905  1224
(source Celestrak)

Offline GWR64

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Still flight tests with Glonass K 705 (15L)
The deviation of the atomic clock looks relatively large, in the weekly bulletin.
Wait.
I hope it won't turn into a second 701.

Offline zubenelgenubi

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Still flight tests with Glonass K 705 (15L)
The deviation of the atomic clock looks relatively large, in the weekly bulletin.
Wait.
I hope it won't turn into a second 701.

Cross-post; my bold; tests ongoing:
https://ria.ru/20210618/glonass-1737502928.html
google translate:
Quote
The source spoke about plans to expand the GLONASS system in 2021
03:31 18.06.2021


The source told about the expected replenishment of the orbital group of the GLONASS system in 2021

MOSCOW, June 18 - RIA Novosti.
<snip>
According to him, it is planned to complete the production of the Glonass-K satellite with number 16 in July, but it will be launched only after testing a similar device with number 15 in orbit, which is scheduled to be completed in October.
<snip>
« Last Edit: 06/19/2021 08:55 pm by zubenelgenubi »
Support your local planetarium! (COVID-panic and forward: Now more than ever.)
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