NROL-24

[Dude]

System Description (Courtesy of Lockheed Martin)

Under contract to the U.S. Air Force Space and Missile Systems Center at Los Angeles Air Force Base, Calif., Lockheed Martin Space Systems, Sunnyvale, Calif., is the prime contractor and systems integrator for the Space Based Infrared System (SBIRS) High program. SBIRS High is the national's next-generation missile warning system and will also provide greatly expanded capabilities for intelligence, surveillance and reconnaissance (ISR) missions.

[Старый]

SBIRS High is the national's next-generation missile warning system and will also provide greatly expanded capabilities for intelligence, surveillance and reconnaissance (ISR) missions.

Это реклама.

[Dude]

Вы зря так думаете... под бабки выделенные на SBIRS произвели много новых камер, их продали SC и NRO, как первичную или вторичную ПН, если посмотреть внимательно, то этом году много планировалось пусков с новыми ИК-камерами. NFIRE, SBIRS II, DSP-23, SBIRS-High F-1,  SBIRS-I, STSS Block 2006...
Думаю, что NROL-24 из этой волны.

[carlos]

По совокупности данных более вероятно, что SBIRS-HEO#2 полетит на NROL-28, запланированном пока что на февраль 2008-го...

[krypton]

По времени стартового окна мэтр предполагает всё-таки SDS:

http://satobs.org/seesat/Dec-2007/0018.html

[carlos]

NROL-24 is scheduled for launch on 2007 Dec 10, between 21:15 and 23:15 UTC, on an Atlas V-401. The most likely target plane appears to be that of 90028/04846A, believed to be an aging SDS communications satellite:

Не совсем понятно - откуда мэтр сделал такой вывод. Все три имеющиеся на сегодня СДСа (90028=SDS B-4, 90025=SDS C-1 и 90027=SDS C-4) летают фактически по одной трассе: первый апогей - над Британией, второй - над Беринговым проливом. Так что NROL-24 может заменить в принципе любой из них. Хотя понятно, что 90028 - самый старый...

An exact repeat of NROL-1's launch, but targeting 90028, would result in launch on 2007 Dec 10 at about 21:57:28 UTC and the following orbits:

Код Выделить Развернуть

MES2
1 79000U          07344.96253472  .00000000  00000-0  00000-0 0    05
2 79000  57.3981 308.5215 0001000 113.4954 176.8000 16.05000000    07

Код Выделить Развернуть

1st ascending node
1 79001U          07344.97396991  .00017925  00000-0  14828-2 0    00
2 79001  57.3981 308.5150 5327478 293.4985  20.3013  5.13214280    05

USA 179 remained in the 5.13 rev/d intermediate orbit for about 7 days, before manoeuvring to its Molniya orbit.

Since NROL-24's booster has about 35 percent greater performance than that of NROL-1, it may not follow the same initial trajectories. Perhaps it will steer into some combination of a more nearly 63 deg initial orbit and a MECO2 orbit of much greater apogee. Upon receipt of the actual planned launch time, I will revise the above search elements, and possibly add others to help bracket the search.

Тут уже сплошные гадания: "а что если схема выведения будет как у USA-179..." Мне почему-то кажется, что м.б. и прямой пуск на 63° или через промежуточную орбиту - но тоже на 63°  :roll:

[carlos]

Еще факт в копилку доказательств версии SDS:

USA-125/90028 is a second-generation SDS satellite. It is a spin-stabilised design with a de-spun aerial array.

Another piece of evidence that the upcoming NROL-24 is a replacement for this satellite comes from the fact that the de-spin mechanism of 90028 seems to have been turned off quite recently. The array is currently (2007 Dec 7, 16:00 UTC) rotating once every 19.8s. If it follows the lead of 90004 and 90020, friction will cause it to spin up and match the body with a rotation period near 5s.

90004 and 90020 each reportedly show visual variability with a 5s component in their light curves. 90028 may join them in this.

The evidence for the spin-up comes from radio observation. It was originally reported by Greg Roberts of South Africa 2007 Dec 7 and I confirmed it from the UK thanks to Greg's timely 'heads-up'.

[krypton]

Новый SDS ещё не улетел, а старый уже декомиссуют?

От всепогодного ныне Робертса (8 декабря):

#90028 Time min frequency 14h11m55s UT +/- 5 sec,    
              freq 2242.4536 Mhz. First time I have seen a
              periodic wobble in the doppler trace.

[carlos]

Рестриктед ареа:

(увеличивается)
Источник:
http://www.patrick.af.mil/shared/media/document/AFD-071207-080.doc

[carlos]

Please remain clear of the
Launch Hazard Area from
2:15pm
 thru
 7:00pm  

If this launch is delayed the next attempt will be on  11 Dec 07.  The Launch Hazard Area time is the same


http://www.patrick.af.mil/shared/media/document/AFD-071207-081.doc

[carlos]

LHA Window: 2:15-7 p.m. EST
Т.е. 19:15 - 24:00 UTC
Так?

[carlos]

Aviation Week and Space Technology:

A secret National Reconnaissance Office (NRO) spacecraft is poised for launch Dec. 10-11 from Cape Canaveral on board a U.S. Air Force Atlas V rocket.

Details emerging about the mission indicate that the Atlas V will launch a Boeing Satellite Data System (SDS) type relay satellite.

The flight is designated NROL-24. The payload will replace one launched into the same "Molniya" highly elliptical orbit on board a Lockheed Martin Titan IV in July 1996.

The SDS system relays imagery and other information from NRO intelligence spacecraft to processing facilities. The data may have initially been sent to an NRO ground station that is in communication with both the SDS relay and intelligence spacecraft. The technique enables "bent-pipe" real time forwarding of critical data.

The SDS spacecraft have been most often associated with relaying visible and infrared imagery from NRO/Lockheed Martin Advanced KH-11 type electro optical satellites. Liftoff from Launch Complex 41 is scheduled for Dec. 10 at 5:04 p.m. EST. If the flight slips the launch time will move 5 minutes for each day the flight is delayed

The mission may be visible to people along the U.S. East Coast as far north as New England. This is because the United Launch Alliance Atlas V will fly an unusual trajectory at dusk, closely paralleling the Eastern Seaboard.

The spacecraft will be placed in about a 500 x 25,000 mile orbit inclined 63 degrees. However, it may initially be placed in a lower orbit. This will mark the first SDS launched by an Atlas V.

The flight could be slipped depending upon launch timing for the space shuttle Atlantis. The NRO and Air Force have agreed to slip their launch if necessary to enable the NASA mission to launch as early as possible.

http://www.spaceref.com/news/viewnews.html?id=1253

[carlos]

NROL-24 is scheduled for launch on 2007 Dec 10 at 22:04 UTC:

http://www.spaceflightnow.com/

Here are updated search elements, assuming an on-time launch, and the same trajectory as the previous similar launch, NROL-1:

Код Выделить Развернуть

MES2
1 79000U          07344.96707176  .00000000  00000-0  00000-0 0    00
2 79000  57.3981 310.1593 0001000 113.4954 176.8000 16.05000000    05

Код Выделить Развернуть

1st ascending node
1 79001U          07344.97850452  .00017925  00000-0  14828-2 0    07
2 79001  57.3981 310.1520 5327478 293.4985  20.3013  5.13214280    05

CAUTION: Both the orbit and the timing of the dump are somewhat uncertain, due to NROL-24's use of a different launch vehicle than NROL-1. As a result, ephemerides made using the above search elements could easily be off by at least 5 deg in position, and quite a few minutes in time, so it is best to scan along the predicted track with the unaided eye. The timing of the dump is also somewhat uncertain, so I recommend allowing at least +/- 10 min.

[carlos]

[carlos]

Launch hazard area на этот раз несколько отличается от прошлых пусков. Какая-то коротковатая... Для сравнения -
NROL-1 (SDS-C4)



STP-1



NROL-30 (NOSS-3-4)

[carlos]

Блин, как же оно все-таки полетит?
- напрямую на 63°?
- через промежуточную "полу-ВЭО" 57° (как SDS-C4)?
- с маневром на манер STP-1?

[carlos]

Осталось меньше часа.

Вторые сутки сам с собой разговариваю...    Ау! Есть кто-нибудь?

[ssb]

Вторые сутки сам с собой разговариваю...    Ау! Есть кто-нибудь?

Ага =)
Смотреть запуск тут: http://ula.edgeboss.net/wmedia-live/ula/29717/300_ula-12102007_071210.asx  (300 кбит)
или тут: http://ula.edgeboss.net/wmedia-live/ula/29717/100_ula-12102007_071210.asx (100 кбит)

[carlos]

Смотрим... Правда, трансляция только до сброса ГО (Т=+4:35). А самое интересное начнется позднее.

[krypton]

Вторые сутки сам с собой разговариваю...  Ау! Есть кто-нибудь?

Под конец службы лениво отвечал в темноту: "здесь я, здесь - куда я нафиг денусь?" Тут движок такой - народу в теме не кажет.

А так, ждём старта. Насчёт зоны отчуждения мне тоже в глаза бросилось. Объяснений пока нет. У кого скоростной канал, расскажите прошло выведение по web-трансляции. Я сегодня на GPRS'е, читаю лог на SpaceflightNow.