Author Topic: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017  (Read 13911 times)

Online Stan Black

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #80 on: 06/27/2017 04:09 PM »
http://www.glonass-center.ru/aboutIAC/Report%20by%20Kosenko%20Zvonar_3.pdf
Is it possible there are two Nivelir projects?
yes.
Nivelir-ZU (RKTs Progress with NPO Lavochkin) and Nivelir-MNK-OZS (ISS Reshetnev) are the two known projects at this time although a third project via RKK Energia is hinted in documentation from time to time.
http://russianspaceweb.com/napryazhenie.html
Well, you would then talk about six projects, namely:
Nivelir
Nivelir-ZU
Nivelir-L
Nivelir-L-ZU
Nivelir-P
Nivelir-MNK-OZS.
It's too many for me -- I persume there is one or two main project(s) and a lot of subprojects, both listed above and still unknown.
Also, I absolutely don't see any relation between Nivelir-L and Napryazheniye-L projects other than NPP OPTEKS ordered some electronic components for both.

Quote
НОУ УНПК МФТИ является соисполнителем 2 научно-исследовательских ра-бот, выполняемых МФТИ (шифр Нивелир и Напряжение, общий объем кото-рых составляет 13 500 тыс. руб.)

Offline Liss

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #81 on: 06/27/2017 09:39 PM »
As to its function, the only piece of information is this:-
Quote
4 ЦНИИ МО РФ совместно с кооперацией подготовлена и представлена заказчику тематическая карточка на проведение базовой НИР Нивелир-П в 2014- 2015 годы Комплексные исследования путей создания многоярусной космиче- ской системы мониторинга геодезических параметров Земли в интересах обеспечения стратегических сил и высокоточного оружия. Экспериментальная отработка ключевых элементов системы.
http://www.glonass-center.ru/aboutIAC/Report%20by%20Kosenko%20Zvonar_3.pdf

Is it possible there are two Nivelir projects?

Speaking of this 2013 presentation, AO ISS has proposed three-part geodetic system with one or two GEO-IK3 spacecraft at 1000 km, a couple of GRACE type satelites at 500 km and one GOCE type satellite with gradientometer at 250-300 km. Neither of these was to be launched before the end of 2018 to a 650 km orbit.
« Last Edit: 06/27/2017 09:41 PM by Liss »
This message reflects my personal opinion based on open sources of information.

Online B. Hendrickx

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #82 on: 07/01/2017 09:15 PM »
Current tracking data (for instance via n2yo.com) shows Cosmos-2519 trailing Cosmos-2486 (Persona-2) by just a couple of minutes. Being in a slightly lower orbit, Cosmos-2519 should soon overtake it. 

On 27 June there was a close pass (593 m) between Cosmos-2519 and APRIZESAT 5 (2011-044E) (as reported in this thread in Reply #73). I'm not sure if the mutual velocity of the satellites would have allowed Cosmos-2519 to snap any pictures of it, but isn't this looking more and more like some type of inspection mission? 

Online Alter Sachse

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #83 on: 07/01/2017 10:33 PM »
Current tracking data (for instance via n2yo.com) shows Cosmos-2519 trailing Cosmos-2486 (Persona-2) by just a couple of minutes. Being in a slightly lower orbit, Cosmos-2519 should soon overtake it. 

On 27 June there was a close pass (593 m) between Cosmos-2519 and APRIZESAT 5 (2011-044E) (as reported in this thread in Reply #73). I'm not sure if the mutual velocity of the satellites would have allowed Cosmos-2519 to snap any pictures of it, but isn't this looking more and more like some type of inspection mission?
We must observe whether Cosmos 2519 changes its orbit.

Online Phillip Clark

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #84 on: 07/13/2017 03:50 AM »
I see no connection between the Cosmos 2519 satellite and the second Kvarts/Persona-1 mission, Cosmos 2486.

All three of the Kvarts satellites are in orbits above 700 km, while Cosmos 2519 has remained in a 653-670 km orbit (+/-1 km), with no sign of an orbital manoeuvre.

Online Phillip Clark

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #85 on: 08/09/2017 10:25 AM »
I have just been doing my monthly check on certain satellites that I am monitoring in some detail and I have noted that Cosmos 2519 has manoeuvred.

The initial orbit from the TLEs was 98.05 deg, 97.97 minutes, 654-669 km.

By July 26 the altitude had evolved to 652-671 km (maybe some tiny manoeuvres during the intervening period or maybe orbital eccentricity inaccuracies in the TLEs) and on July 27 it was tracked in a 650-671 km orbit.

During August 1-3 the orbit dropped from 651-671 km to 649-669 km.   This also saw a small change in the orbital inclination, from 98.04 deg to 97.98 deg: on August 4 there was a further inclination change to 97.94 deg.

No further manoeuvres can be detected with confidence from the TLE data to date.
« Last Edit: 08/09/2017 10:31 AM by Phillip Clark »

Offline Danderman

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #86 on: 08/10/2017 07:15 AM »
The last "maneuver" is consistent with natural decay, as well as imprecision in tracking.

Offline Liss

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #87 on: 08/10/2017 07:49 AM »
The last "maneuver" is consistent with natural decay, as well as imprecision in tracking.
I don't think so. Changes in mean height and inclination are intentional and easily seen in graphs.

« Last Edit: 08/10/2017 07:51 AM by Liss »
This message reflects my personal opinion based on open sources of information.

Online Phillip Clark

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #88 on: 08/10/2017 08:57 AM »
The attached Excel spreadsheet is my own version of Igor's graphs.   Interesting that while the orbital period originally remained almost constant, apogee slowly increased and perigee slowly decreased before the manoeuvres started: of course, this could be an artifact of the TLEs homing in on the correct eccentricity, the orbital parameter which is always difficult to determine for near-circular orbits.   In any case, these graphs clearly show where there were manoeuvres and where there was natural orbital evolution.

Offline Danderman

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #89 on: 08/10/2017 03:56 PM »
Actually, it looks the opposite to me; it looks like the spacecraft was actively maintaining its orbit until about Aug 3, and then stop doing so, allowing natural decay to slowly reduce apogee.

Offline Liss

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #90 on: 08/10/2017 04:01 PM »
Actually, it looks the opposite to me; it looks like the spacecraft was actively maintaining its orbit until about Aug 3, and then stop doing so, allowing natural decay to slowly reduce apogee.
Can you explain changes in inclination too?
This message reflects my personal opinion based on open sources of information.

Online Alter Sachse

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #91 on: 08/10/2017 04:50 PM »
At this level the orbit is stable for an extended period of time.
I think the changes are "maneuvers"

Online Phillip Clark

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #92 on: 08/10/2017 05:04 PM »
At this level the orbit is stable for an extended period of time.
I think the changes are "maneuvers"

Also, manoeuvres are indicated by discontinuities in the graph data, while natural evolution results in smooth, continuous curves.

Offline Magic

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #93 on: 08/12/2017 04:21 AM »
Satellite Digest - 536 listing of Kosmos 2519  note 35: "...would appear to be equivalent of the US SBSS satellite."
Spaceflight Vol60 September 2017 p.346
« Last Edit: 08/12/2017 06:06 PM by Magic »

Online Alter Sachse

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #94 on: 08/12/2017 05:12 AM »
Satellite Digest note 35: "...would appear to be equivalent of the US SBSS satellite."
Spaceflight Vol60 September 2017 p.346
The sun-synchronous orbit is suitable for this

Online B. Hendrickx

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #95 on: 08/13/2017 12:25 AM »
Satellite Digest - 536 listing of Kosmos 2519  note 35: "...would appear to be equivalent of the US SBSS satellite."
Spaceflight Vol60 September 2017 p.346

That assessment is probably based on what the Russian Ministry of Defence has officially said about the satellite:

http://tass.ru/kosmos/4362793

"The satellite is a space platform on which several types of payloads can be installed. The payload installed on the platform is equipment for remote sensing of the Earth and equipment to photograph objects in space".

So are there any indications that Russia has been working on a space-based space surveillance system? There is some evidence that a satellite launched on 2 August 1994 (Cosmos-2285, also identified as Obzor) tested equipment for space surveillance. It carried a multispectral camera called KOE-OZ built by NPP OPTEKS, which was described on the company's website as having been designed for "remote sensing of the Earth's surface and atmosphere as well as near space" (as quoted in an article in "Novosti kosmonavtiki" 10/2002).

One publication identified the satellite as 17F118-0, indicating it used the same bus as the 17F118 Nadezhda navigation satellites built by PO Polyot in Omsk.
http://www.dslib.net/texnika/radiometricheskaja-i-radiacionnaja-korrekcija-informacii-poluchaemoj-optiko.html

Cosmos-2285 used the same launch vehicle (Cosmos-3M) and orbital altitude (roughly 1000 km) as Nadezhda, but had a different inclination (74 vs 83 for Nadezhda). It remained operational for five years.
https://en.sovzond.ru/upload/iblock/ec9/2010_04_004.pdf

In late 2001 a clue emerged that Cosmos-2285 might have been the experimental precursor of an operational constellation of satellites. A document appeared on the website of the State Committee for Radio Frequencies about the allocation of radio frequencies for a satellite constellation called "Stroi". This was said to be intended to "provide the Ministry of Defense with information about the space situation". The constellation was to consist of 3 to 9 small Stroi-KS satellites in three orbital planes and in circular orbits (at 650 to 1000 km altitude) with an inclination of 74. Stroi-KS was said to have been preceded by an experimental system called Stroi-EK (possibly Cosmos-2285).
http://dokipedia.ru/document/5278810

Interestingly, when former OPTEKS director Vladimir Karasev died in 2010, a press release said that "the space-based space surveillance system Stroi-Obzor" had been developed under his leadership.
http://www.netall.ru/gnn/130/573/437561.html

None of the Stroi satellites were ever launched and there are no indications that the project is still alive. If Cosmos-2519 is used for space surveillance, it is probably an entirely different satellite.

One clue that Russia is still interested in such satellites came in a March 2013 interview between Interfax and Viktor Shilin, chief designer of the MAK Vympel corporation, which is closely involved in the development of Russia's ground-based space surveillance systems. Asked how he expected America's space-based space surveillance systems to evolve, he said: "We think that we will also have such space-based optical instruments as well as inspector satellites. Optical imaging satellites [like that] can have a mass of 300 to 400 kg, such plans exist".
http://www.militarynews.ru/story.asp?rid=2&nid=327466

That, of course, doesn't mean such a satellite was actually built in a few years time. I do wonder though (but it's sheer speculation) if there is a link between Cosmos-2519 and the Kanopus-ST satellite (Cosmos-2511), launched on 5 December 2015 (but rendered useless when it failed to separate from the launch vehicle). Kanopus-ST was a 440 kg satellite for remote sensing in the interests of the Ministry of Defence (the exact purpose was never clearly identified). It was launched into an orbit similar to Cosmos-2519 (roughly 700 km, 98.1) and used the same launch vehicle (Soyuz-2-1v/Volga). It had a bus built by PO Polyot and the company responsible for the payload and the project as a whole was NTTs Kosmonit. The payload consisted of a microwave radiometer and a multispectral camera called KMVD-E.

Could Cosmos-2519 have the same bus with a different or related payload?  Admittedly, I have seen no evidence that PO Polyot (now part of Khrunichev) is still in the satellite building business (their primary task is to organize the serial manufacturе of the Angara rocket). Moreover, the development of Kanopus-ST was very troublesome and ran into many delays.

As for the payload, it is interesting to note that NTTs Kosmonit is not only involved in Earth remote sensing, but also in modeling of the space debris environment.
http://resurs.cpi.space.ru
But claiming that it may therefore also be involved in developing a space surveillance payload is a big stretch of the imagination...
 

Online Alter Sachse

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #96 on: 08/13/2017 08:49 AM »
other "Obzor"-projects:
http://www.russianspaceweb.com/obzor_o.html
http://www.russianspaceweb.com/obzor_r.html
 
quote Obzor O-article:
"The satellites were expected to operate in a 700-kilometer circular orbit with an inclination 98.2 degrees toward the Equator."

Online B. Hendrickx

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Re: Kosmos 2519 - Soyuz-2.1v/Volga - Plesetsk - June 23, 2017
« Reply #97 on: 08/13/2017 11:35 AM »
other "Obzor"-projects:
http://www.russianspaceweb.com/obzor_o.html
http://www.russianspaceweb.com/obzor_r.html
 
quote Obzor O-article:
"The satellites were expected to operate in a 700-kilometer circular orbit with an inclination 98.2 degrees toward the Equator."

These are unrelated to Stroi-Obzor.

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