A-ONE: Cygnus Mass Simulator, Dove 1, PhoneSat х3 - Antares-110 - MARS LP-0A - 21.04.2013 21:00 UTC

[Salo]

Ardan пишет:
А во-сколько старт-то?
P.S. Пардон, вопрос снят. Теперь вижу, что в 24.00 ЛМВ

C 01:00 до 03:00 ЛМВ.

[Salo]

SATURDAY, APRIL 20, 2013
1900 GMT (3 p.m. EDT)
T-minus 2 hours. Orbital Sciences reports the launch team is delaying fueling of the Antares rocket by about 10 minutes to allow more time to monitor upper level winds. Liftoff could now occur at 5:10 p.m. EDT (2110 GMT).

Chilldown of the launch pad's liquid oxygen fueling lines is complete, and the launch team has overcome a glitch in the vehicle's telemetry system.

SATURDAY, APRIL 20, 2013
1905 GMT (3:05 p.m. EDT)
Orbital still expects a decision in about 30 minutes on whether to proceed with a launch attempt early in the two-hour launch window this evening or try for a time closer to the end of the window.

[Theoristos]

... шаробаллон в T-5:30 показал сильный ветер, возможен перенос ближе к концу 2-часового окна.
Решение будет принято до начала заливки кислорода в T-1:30.
У них после заправки переохлаждённым кислородом окно сужается до 15 минут.

[Theoristos]

Range is trying to relocate some 40 or so people fr om the extreme south end of Assateague to clear additional people-free space because of the strong southwesterly winds... if they are successful, AND the FAA approves the new debris lim it lines, we MIGHT be able to launch today...

If they do it, it would be the most awesome real-time reprogramming I've ever seen a range do...

I guess they will tell them that either they move back or the will NOT see a launch...

[Theoristos]

Не получилось решить проблему с очисткой увеличенного района падения..
Сдвигают время старта на 10 минут, чтоб успеть обработать данные с баллона, если прогноз будет плохим - сдвигают на час и потом пускают ещё баллон. Потом возможен сдвиг ещё на час до 7:10, если до этого времени ситуация с ветром не улучшится - отменяют пуск на сегодня

[Salo]

SATURDAY, APRIL 20, 2013
1935 GMT (3:35 p.m. EDT)
NEW LAUNCH TIME. The Antares launch is now set for 6:10 p.m. EDT (2210 GMT) after the latest weather balloon report continued to show upper level winds were out of limits.

The latest weather balloon showed winds between 25,000 feet and 40,000 feet of up to 140 mph out of the southwest. One concern is the upper level winds could blow debris into populated areas if there is an accident shortly after liftoff.

The countdown clock continues to hold at T-minus 90 minutes, and the countdown would have to pick up at 4:40 p.m. EDT to support the new launch time.

Weather balloons are launched regularly throughout the countdown to keep track of upper level winds. A fresh set of balloon data should be available in time to evaluate the winds again before deciding on whether to proceed with the 6:10 p.m. launch time.

SATURDAY, APRIL 20, 2013
1942 GMT (3:42 p.m. EDT)
While they await news on the winds, the launch team is holding off loading 21,000 gallons of RP-1 kerosene and 41,000 gallons of super-cold liquid oxygen into the rocket.

A weather briefing a few minutes ago showed the upper level winds tomorrow should be less severe.

[Salo]

Новое время старта 02:10 ЛМВ

[Ardan]

Жаль. Пойду значит спать  

[Salo]

SATURDAY, APRIL 20, 2013
2010 GMT (4:10 p.m. EDT)
T-minus 90 minutes and holding. The countdown clock is still paused as the launch team waits for fresh balloon data on the upper level winds.

All systems on the Antares rocket are in good shape.

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=31696.msg1041349#msg1041349

antonioe пишет:
Cleaning up ... see you tomorrow ... announcing scrub right now

[Liss]

Опять облом... Эх-х.

[Salo]

SATURDAY, APRIL 20, 2013
2033 GMT (4:33 p.m. EDT)
 SCRUB. Facing unrelenting upper level winds, the Antares launch team has delayed the rocket's first test flight until Sunday. Calling off the launch before fueling preserves the opportunity to try again Sunday.

[Salo]

Возможно 22 го с тем же окном.

[Поташев Роман Евгеньевич]

.

[АниКей]

МОСКВА, 21 апр — РИА Новости. Первый испытательный пуск ракеты "Антарес", которая должна была стартовать в ночь на воскресенье с космодрома на острове Уоллопс на восточном побережье США, отложен по меньшей мере на сутки из-за сильного ветра — это уже вторая отсрочка, первоначально запуск планировался на 17 апреля.
"Запуск "Антареса" сегодня отменен, превышены нормы безопасности по погоде из-за сильного ветра на высоте. Мы попробуем снова завтра", — говорится в сообщении компании Orbital Sciences — разработчика ракеты. Следующая попытка запуска планируется на 01.00 мск в понедельник.
Ранее данные с метеорологических шаров-зондов показали, что скорость ветра на высоте от 7 до 12 километров составляет около 63 метров в секунду — это выше допустимых для запуска значений.
Первоначально запуск планировался на 17 апреля, но за 12 минут до старта пуск был отменен из-за технической неполадки — слишком рано отделился один из кабелей питания.

РИА Новости http://ria.ru/science/20130421/933728194.html#ixzz2R2Z9yKHf

[Блудный]

"Вы опять не переместились?" (Би)

[Посторонний]

Theoristos пишет:
На ustream включилась трансляция
 http://www.ustream.tv/channel/stennisaj26-1/theater

Уже начали транслировать. Качество изображения невысокое.

Волны не такие большие, как вчера, скорость ветра поменьше.

[Посторонний]

Пуска жду как Нового Года!  
Хочется, чтобы пуск был успешным.
Удачи!

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=31662.msg1041528#msg1041528

antonioe пишет:

Since there has been some confusion about how the winds affected our launch attempts and who has authority to wave what, I'd like to offer the following (admittedly a bit pedestrian) explanation:

Surface winds AT THE PAD affect the clearance during lift-off. Orbital has established a basic 15kts limit for ANY DIRECTION, waivable to 20kts by LD (Eberly). Eberly has a "pocket reserve" of a few kts if the wind direction is "away fr om the TEL." The range helps LD with the go/nogo decision (including computing its effect on POV) but this is not a range decision - it's Orbital's.

Wind SHEAR during ascent induces an angle of attack that changes the aerodynamic load on the vehicle. This being a first flight, we (Orbital) have rather strict limits on this, which can be alleviated by the choice of trajectory (out of about 5 pre-loaded in the Flight Computer) which can be made as late as L-45m. Range sends us (Paul Baumgartner and Tracy Chisholm) the balloon data and they (Paul and Tracy) compute the resulting aero loads right at their consoles in the RCC. Again, an Orbital call - no "single" wind speed lim it value. Not counted on the Weather Officer's POV forecast.

Wind magnitude and direction affect the ground track of trajectory which could bring the vehicle closer to a destruct line than we would be comfortable with. The trajectories (out of the five mentioned above) that relief aerodynamic loads tend also to be "looser" in terms of lateral position tightness... so, for example, yesterday, only ONE of the trajectories met the aero load criteria (again, yesterday was a 4-sigma day as far as altitude winds were concerned) and that trajectory "grazed" the north destruct line close to the pad. Again, this is an Orbital call, and Saturday we were ready to fly with that trajectory and those winds (having discussed the trajectory with the FSO who was OK with the grazing.) Not in the POV.

Now for the part which is NOT under Orbital's discretion: winds and clouds affect three "Public Safety" criteria: Distance Focusing Overpressure (DFO), Toxicity, and Debris. I don't know a lot about DFO - I believe it is associated with being indoors and a blast breaking the windows and the glass injuring the public. Toxicity is associated with things such as nitrogen tetroxide, hydrazine and - gulp - plutonium. We don't have any of these nasty items on THIS flight (Cygnus WILL carry Hydrazine and N2O4.) Debris is simply pieces of a (supposedly destroyed) rocket falling on undesirable places and is affected by, among other things, population density.

Both the ranges AND the FAA have a "probability of casualty (E sub C)" calculation protocol that is driven by the size and characteristics of the vehicle, the geography of the trajectory, and the atmosphere (winds, clouds, temperature profile, etc.) The range recalculates these probabilities whenever they launch a balloon.

All U.S. ranges agreed to add up the E sub C of each effect and use a composite criterion (100 per million) as a range go/no go criterion. FAA on the other hand (I will not comment on why) requires each of the three to be under 30 ppm. Therefore, you could be OK with the range E sub C but not with the FAA's, as happened on Wednesday (DFO was higher than 30 ppm, toxicity is zero for this vehicle, debris was under 30 ppm) - the composite was well below 100 ppm, so the range was OK, but the DFO was above 30 ppm, so FAA was NOT OK.

In addition, the range can - and does - impose a "no debris expected to fall" area in the VICINITY OF THE RANGE - and the FAA automatically "imposes" the same rule. There are no "probabilities" in this calculation: it is a "binary" criterion. Balloon data also drives this calculation.

THIS ONE is what stopped us yesterday: Wallops was willing to do a real-time redraw of the affected area (the souther tip of Assateague Island) that the strong mid-altitude winds created, with the necessary evacuation of the public (some 40 people according to the Fish and Wildlife people that control that area), but FAA was unable to concur in real time.

None of these criteria can be part of the POV since they depend on the complex atmospheric profile that is much, much harder to forecast than, say, surface winds or cloud bases.

I hope this clarifies a bit what is admittedly a very complex situation.

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=31704.msg1041525#msg1041525

antonioe пишет Today at 02:25 PM:

WX brief in progress... MAX ALTITUDE WINDS 88KTS!!! A bit better than yesterday's 105 to 120... surface winds forecasted 10-14KTS Gusting to 17K - conservative Probabiity of Violation of 20% (all of it surface winds) at 5 pm.

antonioe пишет Today at 03:08 PM:

Warm Helium flowing to the vehicle.

antonioe пишет Today at 03:08 PM:

 Last balloon data's DFO is green - debris and toxicity due shortly (toxicity is always very low for THIS flight since it's only the RP-1 and plume constituents - no Hydrazine or N2O4; we will have to wait for Cygnus to worry about that.)

Previous balloon was green for all criteria - range and FAA (see my explanation on the General thread.)

Unless I'm very much mistaken, we're going to launch a rocket today!

antonioe пишет Today at 03:28 PM:
 
Last balloon debris analysis green