Quote from: russianhalo117 on 06/25/2017 04:17 pmQuote from: Stan Black on 06/25/2017 08:58 amhttp://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.htmlWell, you would then talk about six projects, namely:NivelirNivelir-ZUNivelir-LNivelir-L-ZUNivelir-PNivelir-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 from: Stan Black on 06/25/2017 08:58 amhttp://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
http://www.glonass-center.ru/aboutIAC/Report%20by%20Kosenko%20Zvonar_3.pdf Is it possible there are two Nivelir projects?
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.)
As to its function, the only piece of information is this:-Quote4 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?
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».
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?
The last "maneuver" is consistent with natural decay, as well as imprecision in tracking.
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.
At this level the orbit is stable for an extended period of time.I think the changes are "maneuvers"
Satellite Digest note 35: "...would appear to be equivalent of the US SBSS satellite."Spaceflight Vol60 September 2017 p.346
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
other "Obzor"-projects:http://www.russianspaceweb.com/obzor_o.htmlhttp://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."