Autor Wątek: Ostatni start Delty II (15.09.2018)  (Przeczytany 285 razy)

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Ostatni start Delty II (15.09.2018)
« dnia: Wrzesień 16, 2018, 09:21 »
Ostatni start Delty-2
  15.09. o 13:02 z Vandenberg wystrzelona została RN Delta-2 (7420-10C), która wyniosła w T+47' 42" na orbitę o parametrach:
hp=481 km, ha=481 km, i=94,0° satelitę klimatologicznego ICESAT-2 (Ice, Cloud & Land Elevation Satellite) oraz nanosatelity
programu ELaNa-XVIII: ELFIN, ELFIN-STAR, SurfSat i CP 7. Był to ostatni start rakiety serii Delta-2.
http://lk.astronautilus.pl/n180901.htm#03

<a href="http://www.youtube.com/watch?v=ElpZHwBWzC0" target="_blank">http://www.youtube.com/watch?v=ElpZHwBWzC0</a>
https://www.youtube.com/watch?v=ElpZHwBWzC0

<a href="http://www.youtube.com/watch?v=jaIAqj-ReII" target="_blank">http://www.youtube.com/watch?v=jaIAqj-ReII</a>
https://www.youtube.com/watch?v=jaIAqj-ReII

<a href="http://www.youtube.com/watch?v=r8uhOC4p6kQ" target="_blank">http://www.youtube.com/watch?v=r8uhOC4p6kQ</a>
https://www.youtube.com/watch?v=r8uhOC4p6kQ



Tanking test marks resumption of Delta 2 rocket’s final launch campaign
August 16, 2018 Stephen Clark

With each day, another milestone passes like clockwork for engineers and technicians preparing a United Launch Alliance Delta 2 rocket for liftoff next month from California’s Central Coast. With 154 missions in the books — that’s a lot for a space launcher — you might be right to say getting a rocket ready to fly is just another day at the office for the Delta 2 team.

But this summer’s launch campaign at Vandenberg Air Force Base, overlooking the Pacific Ocean between Los Angeles and San Francisco, is the last for the Delta 2 program after a run of launches spanning more than 29-and-a-half years.

The payload for the last Delta 2 flight is NASA’s ICESat 2 satellite, an orbiting platform that will use a laser to chart the melting of ice brought on by climate change.

“In a lot of ways, the Delta 2 launch of ICESat 2 is truly going to be the end of an era,” said Tim Dunn, NASA’s launch director for the ICESat 2 mission, in a recent interview. “It’s a little melancholy, but at the same time what a great history to celebrate.” (...)
https://spaceflightnow.com/2018/08/16/fueling-test-marks-resumption-of-delta-2-rockets-final-launch-campaign/

Scientists eager to renew global ice measurements with ICESat 2 mission
September 14, 2018 Stephen Clark


Technicians open and inspect the flight door to ICESat 2’s laser instrument shortly after the spacecraft arrived at Vandenberg Air Force Base, California, in June. Credit: USAF 30th Space Wing/Timothy Trenkle

(...) ICESat 2 stands for Ice, Cloud and land Elevation Satellite 2, a follow-on to NASA’s ICESat mission which measured global ice sheets from 2003 until 2009. Equipped with a laser split into six beams, ICESat 2 will fly around 300 miles (500 kilometers) above the planet in an orbit tilted at a 92-degree angle to the equator, giving the mission coverage up to 88 degrees north and south latitude.

Featuring an improved laser instrument designed to provide more precise measurements than its predecessor, ICESat 2 will extend a data series which has shown ice is melting around the edges of Greenland and Antarctica, and is thinning in the oceans. (...)
https://spaceflightnow.com/2018/09/14/scientists-eager-to-renew-global-ice-measurements-with-nasas-icesat-2-mission/

Installation of ice-measuring satellite caps assembly of last Delta 2 rocket
August 28, 2018 Stephen Clark


The Delta 2 rocket set to launch NASA’s ICESat 2 satellite is pictured on its launch pad in June. Credit: NASA/Randy Beaudoin

The ICESat 2 satellite was built by Northrop Grumman Innovation Systems, and its single instrument — the Advanced Topographic Laser Altimeter System, or ATLAS — was developed at NASA’s Goddard Space Flight Center. (...)
https://spaceflightnow.com/2018/08/28/installation-of-ice-measuring-satellite-caps-assembly-of-last-delta-2-rocket/

Photos: Final Delta 2 rocket assembled for launch in California
August 16, 2018 Stephen Clark


Credit: NASA/Randy Beaudoin
https://spaceflightnow.com/2018/08/16/photos-final-delta-2-rocket-assembled-for-launch/

https://spaceflightnow.com/2018/09/14/delta-2-icesat-2-mission-status-center/
https://spaceflightnow.com/2018/08/28/installation-of-ice-measuring-satellite-caps-assembly-of-last-delta-2-rocket/

Delta II concludes amazing legacy with ICESat-2 launch
written by William Graham September 14, 2018



<a href="http://www.youtube.com/watch?v=yvZas1WBiWg" target="_blank">http://www.youtube.com/watch?v=yvZas1WBiWg</a>
https://www.youtube.com/watch?time_continue=3&v=yvZas1WBiWg
https://www.nasaspaceflight.com/2018/09/delta-end-legacy-icesat-2-launch/

ICESAT 2
ELFIN, ELFIN-STAR
SurfSat
CP 7 (DAVE)

Artykuły astronautyczne
« Ostatnia zmiana: Wrzesień 19, 2018, 09:11 wysłana przez Orionid »

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Odp: Ostatni start Delty II (15.09.2018)
« Odpowiedź #1 dnia: Wrzesień 16, 2018, 11:26 »
'Godspeed Delta II', Historic Workhorse Rocket Delivers ICESat-2 to Orbit On 155th And Final Mission
By Ben Evans, on September 15th, 2018


The final United Launch Alliance (ULA) Delta II rocket launch with the NASA Ice, Cloud and land Elevation Satellite-2 (ICESat-2) onboard, Saturday, Sept. 15, 2018, Vandenberg Air Force Base in California. The ICESat-2 mission will measure the changing height of Earth’s ice. Photo Credit: John Kraus / AmericaSpace

(...) In traditional style, the Delta II for this morning’s launch of ICESat-2 received a four-digit designation of “7420”, which describes its membership of the 7000-series of the rocket (“7”), the presence of four (“4”) strap-on, solid-fueled Graphite Epoxy Motors (GEM)-40, the presence of a second stage (“2”) and the absence (“0”) of an upper stage. In February 2018, the two halves of the Delta II’s 27.9-foot-tall (8.5-meter) payload fairing arrived at Vandenberg, followed by the 19.7-foot-long (6-meter) second stage a few weeks later and finally the 85.6-foot-long (26-meter) first stage, which was unpacked from its shipping container and readied for pre-launch processing on 16 April. Early in June, the first stage was raised to the vertical in the SLC-2W Mobile Service Tower (MST) and the four strap-on boosters were installed at its base. Next came the “interstage”, which provides a connection point with the second stage, which was itself hoisted atop the stack on 21 June.

In readiness for launch, the first stage was loaded with 66,140 pounds (30,000 kg) of a highly refined form of rocket-grade kerosene, known as “RP-1”, after which the Launch Director conducted a poll for liquid oxygen tanking. All told, the Delta II required 147,710 pounds (67,000 kg) of oxidizer to propel ICESat-2 into near-polar orbit. Weather briefings, wind assessments and cryogenic topping occupied much of the final hour of Saturday morning’s countdown.

Originally targeting 5:46 a.m. PDT, the launch time was pushed back a bit to resolve a temperature issue on the rocket’s second stage. A new liftoff time of 6:02 a.m. PDT was then targeted. And while there was some fog, it was thin enough at the launch site to allow people to actually see the launch, as Vandenberg is notorious for thick fog and only launches being heard, not seen. Weather was 100% GO.

Thus began a flurry of activity as the Delta II transitioned to Internal Power and the ordnance and ignition systems of the four GEM-40 strap-on boosters were armed for flight. Propellant tanks were confirmed at flight pressure and at T-60 seconds the Launch Enable Switch was moved to “Flight Mode”. At 30 seconds to go, the liquid oxygen fill-and-drain valves were closed for flight and the welcoming call of “Green Board” confirmed that all relevant stations were declaring no issues which might prevent an on-time liftoff. The Delta II’s ignition system was armed at T-10 seconds, allowing for a rapid sequence of events. The RS-27A first-stage engine roared to life at T-2.7 seconds, followed by the ear-rattling crackle of the four GEM-40s at T-0. Piercing the pre-dawn darkness, the 155th and last Delta II took flight under a combined thrust in excess of 640,000 pounds (290,000 kg).(...)

<a href="http://www.youtube.com/watch?v=4-Rn7u3C_JA" target="_blank">http://www.youtube.com/watch?v=4-Rn7u3C_JA</a>
https://www.youtube.com/watch?v=4-Rn7u3C_JA

http://www.americaspace.com/2018/09/15/godspeed-delta-ii-historic-workhorse-rocket-delivers-icesat-2-to-orbit-on-155th-and-final-mission/

Workhorse Delta II Stands Ready at Vandenberg for Final Launch on Saturday
By Ben Evans, on September 14th, 2018

(...) Primary payload for Saturday’s mission is ICESat-2, part of NASA’s Earth Observing System (EOS) and devoted to measurements of ice-sheet mass balance, land topography—including cities, lakes and reservoirs—and vegetation-canopy characteristics on a global scale. During its minimum three-year mission, the spacecraft will investigate how melting polar ice-sheets contribute to sea-level change and climate change. ICESat-2 data will also estimate sea-ice thickness to examine the exchange of energy, mass and moisture between the ice, ocean and atmosphere and measure vegetation canopies worldwide as part of efforts to shed new light on large-scale biomass change. (...)

http://www.americaspace.com/2018/09/14/workhorse-delta-ii-stands-ready-at-vandenberg-for-final-launch-on-saturday/

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Odp: Ostatni start Delty II (15.09.2018)
« Odpowiedź #2 dnia: Wrzesień 17, 2018, 08:25 »
Ostatni lot rakiety Delta II
BY MICHAŁ MOROZ ON 17 WRZEŚNIA 2018


Ostatni start rakiety Delta II / ULA
15 września z kosmodromu Vandenberg wystrzelona została ostatnia rakieta Delta II. Wyniosła klimatologicznego ICESAT-2 dla NASA oraz 4 nanosatelity.

Ostatni start rakiety Delta II rozpoczął się o godzinie 15:02 CEST. Lot głównego ładunku – satelity ICESAT-2 – trwał 47 minut i 42 sekundy. Satelita został umieszczony na orbicie na wysokości 481 km i nachyleniu 94 stopni.


Wizualizacja satelity ICESAT-2 / NG

Misja ICESAT-2 będzie wykonywać trójwymiarowe pomiary lodu. Pozwoli to na dokładną analizę zmian terenu lodowców czy wiecznej zmarzliny.  Ważący blisko 1400 kg satelita został zbudowany przez przedsiębiorstwo Orbital Sciences Corporation (obecnie zakupionej przez Northrop Grumman) na zlecenie amerykańskiej agencji kosmicznej NASA. Misja jest następcą pierwszego satelity ICESAT, który pracował w latach 2003-2010. Satelita ma wykonywać pomiary naukowe przez co najmniej 3 kolejne lata.

Pierwszy lot Delty II został wykonany w 1989 roku. Od tego czasu rakieta poleciała 155 razy wynosząc szereg różnych misji: m.in. pierwszych satelitów systemu GPS jak również łazików marsjańskich Spirit i Opportunity.

United Launch Alliance, operatorowi lotu Delty II pozostał jeszcze jeden egzemplarz tej rakiety nośnej. Zostanie on umieszczony na terenie Ogrodu Rakietowego w centrum turystycznym Kennedy Space Center.

(PA, GSP, SN)
https://kosmonauta.net/2018/09/ostatni-lot-rakiety-delta-ii/

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Odp: Ostatni start Delty II (15.09.2018)
« Odpowiedź #3 dnia: Wrzesień 21, 2018, 23:02 »
NASA blasts off space laser satellite to track ice loss
September 15, 2018


Graphic on NASA's ICESat-2 mission.

(...) The mission is meant to last three years but has enough fuel to continue for 10, if mission managers decide to extend its life.

https://phys.org/news/2018-09-nasa-blasts-space-laser-satellite.html#jCp

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Odp: Ostatni start Delty II (15.09.2018)
« Odpowiedź #4 dnia: Wrzesień 22, 2018, 22:32 »
Photos: Final Delta 2 launch shines before dawn in California
September 21, 2018 Stephen Clark


Credit: United Launch Alliance


Credit: Alex Polimeni/Spaceflight Now


Credit: United Launch Alliance
https://spaceflightnow.com/2018/09/21/photos-final-delta-2-launch-shines-before-dawn-in-california/