Intelsat 35e - Falcon 9 - Kennedy LC-39A - 05.07.2017 23:38 UTC

[tnt22]

НОРАД опубликовал первичные наборы TLE объектов

FALCON 9 R/B

1 42818U 17041A 17187.06809640 -.00000646 +00000-0 +00000-0 0 9990
2 42818 025.8417 109.6958 7613464 177.5946 043.3616 01.85741948000000

Эпоха UTC 2017-07-06 01:38:03, орбита 300.6 km × 42867.7 km × 25.8°, период 775.3 min

INTELSAT 35

1 42819U 17041B 17187.06395751 -.00000644 +00000-0 +00000-0 0 9992
2 42819 025.8458 109.7005 7607684 177.5893 040.7257 01.86325044000006

Эпоха UTC 2017-07-06 01:32:05, орбита 302.8 km × 42748.8 km × 25.8°, период 772.8 min

[Apollo13]

silentpom пишет:
поясните как вы так быстро скорости находите

Можно почитать здесь и здесь.

[Georgea]

Apollo13 пишет:

silentpom пишет:
поясните как вы так быстро скорости находите

Можно почитать здесь и здесь .

Сохранил себе, спасибо  

[tnt22]

http://spaceflight101.com/falcon-9-intelsat-35e/falcon-9-outperforms-expectations-with-intelsat-35e/

Falcon 9 Outperforms Expectations in Recent Orbital Delivery with Intelsat 35e
July 7, 2017

SpaceX's Falcon 9 rocket was able to show off its impressive performance this week and exceeded expectations when lifting the heavy Intelsat 35e communications satellite into a high-energy orbit, giving the craft a head start on the way into its operational orbit and potentially adding several years to its operational life later down the road.

The expendable Falcon 9 – flying without landing legs or grid fins SpaceX fans have come accustomed to – blasted off fr om Launch Complex 39A at the Kennedy Space Center on Wednesday at 23:38 UTC – marking the third Falcon 9 to lift off in a period of 12 days, setting a new record for the California-based launch provider. Wednesday's mission required Falcon 9 to give all its performance to lifting the 6,761-Kilogram Intelsat 35e spacecraft, using up all available propellant on both rocket stages without making any attempt to return the first stage.

Спойлер

Photo: SpaceX


Photo: SpaceX

The flight marked SpaceX's third expendable launch in 2017 and pushed the record for Falcon 9's heaviest Geotransfer mission that previously stood at 6,086 Kilograms. Thundering away fr om Florida's Space Coast with a total thrust approaching 700 metric-ton-force, Falcon 9 fired its first stage for the first 163 seconds of the flight, accelerating the 70-meter tall rocket to 2.63 Kilometers per second.

As the first stage departed toward a watery grave in the Atlantic, Falcon 9 fired up its 95,000-Kilogram MVac engine on a planned 5-minute and 44-second burn to enter a Parking Orbit in the usual two-burn GTO mission design that calls for an initial boost into Low Earth Orbit ahead of a critical re-start around the equator so that the high point of the highly elliptical target orbit would be placed over the equator on the opposite side of the planet.

Falcon 9 reached a parking orbit of around 165 x 250 Kilometers and coasted for 17.5 minutes to reach the proper position for the second burn. The critical second burn was designed to run to depletion in what is called a Minimum Residuals Shutdown – allowing the second stage to use up all its propellants with some margin for a safe engine cutoff. This technique was used by SpaceX before to extract some extra performance but never with a satellite this heavy.

Per the mission requirements, Intelsat 35e had a minimum target orbit of 250 by 31,230 Kilometers, inclined 26 degrees to either side of the equator.


Satellite Separation – Photo: SpaceX Webcast

This sub-GTO type orbit would have enabled Intelsat 35e to achieve its 15-year primary mission with its onboard propellant supply, but operator Intelsat was hoping Falcon 9 could provide some extra energy to gain additional propellant reserves on the satellite for a potential extended mission as today's GEO satellites can typically outlive their 15-year lifetime specification if propellant is available.

The second burn was expected to run for 52 seconds to reach the target orbit but ended up being around 58 seconds in duration, showing Stage 2 did have some extra performance in store in the form of available propellant. The delta-v provided by the second burn was around 2.49km/s and orbital data showed Intelsat 35e in a Supersynchronous Transfer Orbit of 296 by 42,742 Kilometers, inclined 25.85 degrees – confirming Falcon 9 outperformed substantially and turned the expected sub-GTO orbit into a slightly supersynchronous delivery.


Image: Intelsat

The achieved orbit is around 105m/s closer to the satellite's operational Geostationary Orbit in terms of change in velocity needed by Intelsat 35e to reach GEO, equivalent to around two years of in-orbit stationkeeping which Intelsat will gladly accept to generate more revenue fr om the satellite beyond its lifetime specification.

Although Wednesday's mission could not show off another returned booster, it showcased a critical capability SpaceX so far had no chance of demonstrating: the launch of a 6.6-metric ton class satellite into a Geostationary Transfer Orbit. Intelsat 35e was on the heavy end of what is currently common on the commercial market.

Intelsat 35e sailed off on its 15+ year mission 32 minutes after Falcon 9 blasted off, embarking on several weeks of orbital re-shaping to circle up into Geostationary Orbit wh ere the satellite matches the speed of Earth's rotation to remain locked in the same position relative to the ground. The craft is targeting a slot over the Atlantic Ocean, parking at 33 degrees West for around 45 days of checkouts ahead of a five-day drift over to 34.5°W wh ere the satellite will replace the aging Intelsat 903 spacecraft that is approaching a well-deserved retirement after a 15-year mission.


Photo: Intelsat

Intelsat 35e, the fourth 'Epic' satellite with an advanced digital payload, employs a combination of wide and spotbeams in C-Band and large Ku coverage areas to deliver high-performance services with spot beams enabling data-intensive services like wireless backhaul, enterprise and mobility services in areas wh ere weather patterns necessitate the use of the more robust C-Band spectrum. The Ku-Band payload delivers a customized high-power wide beam for Direct-to-Home Television distribution in the Caribbean, and services for mobility and government applications in Europe, the Caribbean, and Africa.

>> Intelsat 35e Overview

After a rapid fire campaign with three launches in 12 days, SpaceX is looking at a five-week gap before the next orbital launch, currently planned on August 10 with the Dragon SpX-12 mission carrying supplies to the Space Station. The company will make use of the downtime for work on Space Launch Complex 40 that is aiming for a resumption of launches in the fall, following the September 1st mishap that caused considerable damage to the facility. Launch Complex 39A will also receive attention with further dismantling planned on the former Rotating Service Structure employed by the Space Shuttle.

Per the current plan, SpaceX will re-open SLC-40 for Falcon 9 launches at which point missions will transition from LC-39A, allowing that pad to be temporarily shut down for more invasive work as part of preparations for Falcon Heavy. The long-delayed Falcon Heavy is expected to reach the launch pad by the end of the year, aiming for what is described as a high-risk mission with a pair of refurbished side boosters that started their careers as stand-alone rockets.

[свернуть]

[Georgea]

В общем, я так понимаю, на 8,3 тонны на ГПО-1800 у Фалькона пока совсем не похоже, да?

[tnt22]

НОРАД переопределил объекты запуска
 

[silentpom]

Georgea пишет:
В общем, я так понимаю, на 8,3 тонны на ГПО-1800 у Фалькона пока совсем не похоже, да?

6761.1 на GTO-1719 как бы. у меня получилось что это 7034кг на ГПО-1800
но это не совсем верный расчет, потому что сам по себе вывод на суперсинхронную с изменением наклонения неоптимален - он на наклон потерял много

[silentpom]

Apollo13 пишет:
Можно почитать здесь и здесь .

спасибо

[tnt22]

Сабж начал подъём перигея

По данным n2yo

INTELSAT 35

1 42818U 17041A 17190.99208010 -.00000170 +00000-0 +00000-0 0 9992
2 42818 017.2189 108.9478 6691008 178.8556 088.6841 01.71675554000062 

Эпоха UTC 2017-07-09 23:48:35, орбита 3378.0 km × 42804.1 km × 17.2°, период 838.8 min

[tnt22]

Сабж - на ГСО
 
По данным n2yo
 
INTELSAT 35
 
1 42818U 17041A 17236.17189543 -.00000267 00000-0 00000+0 0 9998
2 42818 0.0505 286.0003 0002318 216.9441 217.0583 1.00272216 563 
 
Эпоха UTC 2017-08-24 04:07:32, орбита 35783.8 km × 35803.4 km × 0.05°, период 1436.1 min

Текущее местоположение: 0.02°N 34.48°W

[tnt22]

Intelsat Q3 17 Earnings Release Final 10.26.pdf