VENUS (Venµs), OPSAT-3000 (SHALOM) , SAMSON 1/2/3 - Vega (VV10) - Kourou ZLV - 02.08.2017 01:58 UTC

Автор tnt22, 15.05.2017 17:28:10

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tnt22

Цитировать08/01/2017 22:35
A Vega rocket is counting down to launch from French Guiana at 0158:33 GMT Wednesday (9:58:33 p.m. EDT; 10:58:33 p.m. French Guiana time Tuesday) with pair of Earth-imaging satellites for the Italian military and a French-Israeli environmental monitoring project.
Спойлер
The 811-pound (368-kilogram) Optsat 3000 satellite, set to ride in the upper position in the Vega's payload fairing, will collect high-resolution optical imagery for the Italian military from an orbit 280 miles (450 kilometers) above Earth.

The 582-pound (264-kilogram) Venµs spacecraft, a joint mission managed by the Israel Space Agency and the French space agency CNES, will help scientists track the health and growth of global vegetation.
Both satellites were built by Israel Aerospace Industries.

The countdown is progressing as planned, with activations of the Vega rocket's power supply, on-board computer and navigation system coming in the next hour.

Meanwhile, ground teams are turning on the Optsat 3000 and Venµs satellites and confirming their readiness for tonight's ride into orbit.

The computer will be tested and loaded with the mission's flight software program at 2118 GMT (5:18 p.m. EDT), and the Vega's navigation unit will be aligned and verified functional 2128 GMT (5:28 p.m. EDT).

The launch team will receive a weather briefing before rollback of the Vega launch facility's mobile gantry. The launch pad's mobile service tower will be retracted to launch position at 2243 GMT (6:43 p.m. EDT), rolling on rails to a point 260 feet from the Vega rocket.

The launcher's navigation system will be tested again at 2333 GMT (7:33 p.m. EDT), and Vega's telemetry transmitters and transponders are activated again after the rollback of the launch pad gantry around 0043 GMT (8:43 p.m. EDT).

Engineers will verify the readiness Vega's systems at 0108 GMT (9:08 p.m. EDT), and a final pre-launch weather briefing is scheduled for 0148 GMT (9:48 p.m. EDT).

The synchronized launch sequence takes over the countdown about four minutes prior to liftoff. The computer-controlled final sequence checks thousands of parameters in the final steps of the countdown.

After liftoff, Vega will clear the pad's four lightning towers and pitch north from the Guiana Space Center, heading over the Atlantic Ocean and surpassing the speed of sound in about 30 seconds.
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tnt22



tnt22

Цитировать08/02/2017 02:17
All systems are reported to be "go" for launch tonight in an instantaneous launch opportunity at 0158:33 GMT (9:58:33 p.m. EDT).

So far in the countdown, Vega's systems have been powered on and launch controllers have checked communications, tracking and command links between the rocket and ground facilities at the Guiana Space Center.
Спойлер
The launch pad's 16-story mobile gantry should now be retracted to its launch position about 260 feet (80 meters) fr om the rocket.

The 270-square-mile space center, run by the French space agency, CNES, and the European Space Agency, is located on the jungle coastline of French Guiana, situated on the northeast corner of South America.

The Vega launch pad, known by its French acronym ZLV, is about 1 kilometer southwest of the Ariane 5 launch complex. It was built on the former site of ELA-1, the home of Ariane 1, Ariane 2 and Ariane 3 launchers from 1979 until 1989.

Construction of the Vega launch pad began in 2004, including the building of a new 16-story mobile gantry weighing some 1,000 metric tons. A fixed umbilical mast standing 105 feet tall provides air conditioning to the Vega's payload.

Workers also added four lightning towers at the pad to protect the Vega rocket from thunderstorms. 
Unlike the Ariane 5 rocket, the Vega's stages are stacked on the pad inside the mobile gantry, which provides protection of the launcher from weather at the spaceport.

Vega's countdown is managed from Guiana Space Center's prime control center less than a mile from the launch pad, the same building wh ere Ariane 5's countdown is controlled.
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tnt22

https://spaceflightnow.com/2017/08/01/timeline-for-vega-launch-with-optsat-3000-and-ven%C2%B5s/
ЦитироватьTimeline for Vega launch with Optsat 3000 and Venµs
August 1, 2017 Stephen Clark

A Vega rocket is set to deliver two satellites into similar but distinct orbits for the Italian military and the French and Israeli space agencies.

Here are the key events scheduled during the European Vega rocket's launch from French Guiana with the Italian military's Optsat 3000 high-resolution reconnaissance satellite and the French-Israeli Venµs environmental satellite.
Спойлер

Credit: Arianespace

T+00:00:00 – Liftoff


The Vega rocket's first stage P80 solid rocket motor ignites and powers the 98-foot-tall booster off the launch pad 0.3 seconds later. The P80 first stage motor generates a maximum of 683,000 pounds of thrust.

T+00:00:31 – Mach 1


The Vega rocket surpasses the speed of sound as it soars on an easterly trajectory from French Guiana. The rocket will reach Max-Q, the point of maximum aerodynamic pressure, at T+plus 53 seconds.

T+00:01:57 – First stage separation


Having consumed its 194,000 pounds (88 metric tons) of solid propellant, the 9.8-foot-diameter (3-meter) P80 first stage motor is jettisoned at an altitude of about 33 miles (53 kilometers). The second stage Zefiro 23 motor will ignite a second later to begin its 102-second firing.

T+00:03:40 – Second stage separation


The Zefiro 23 motor burns out and jettisons.

T+00:04:03 – Third stage ignition


Moving at a velocity of nearly 9,000 mph, or about 3.9 kilometers per second, the Vega rocket's Zefiro 9 motor ignites for the third stage burn.

T+00:04:08 – Fairing separation


The Vega's 8.5-foot-diameter (2.6-meter) payload fairing is released as the rocket ascends into space.

T+00:06:42 – Third stage separation


The Zefiro 9 third stage shuts down and separates, having accelerated the rocket to nearly orbital velocity.

T+00:07:52 – First AVUM ignition


The Vega rocket's Attitude and Vernier Module, or fourth stage, ignites for the first time. The AVUM burns hydrazine fuel with an RD-843 engine provided by Yuzhnoye of Ukraine.

T+00:14:09 – AVUM first cutoff


The Vega's AVUM fourth stage is turned off after an 6-minute, 17-second burn, beginning a 26-minute coast until the engine is ignited again.

T+00:40:37 – Second AVUM ignition


The AVUM fires a second time for a 85-second burn to put the Optsat 3000 satellite into its targeted orbit.

T+00:42:02 – AVUM second cutoff


The AVUM engine shuts down after reaching a near circular orbit with an altitude of 280 miles (450 kilometers) and an inclination of 97 degrees.

T+00:42:49 – Optsat 3000 separation


The 811-pound (368-kilogram) Optsat 3000 Italian military surveillance satellite deploys from the Vega rocket's upper payload position.

T+00:52:04 – Vespa jettison


The Vespa dual-payload adapter jettisons to reveal the Venµs satellite.

T+00:53:05 – Third AVUM ignition


After jettisoning a cover to expose the Venµs satellite, the AVUM's RD-843 engine fires a third time for a 58-second burn to boost into a higher orbit for deployment of Venµs.

T+00:54:03 – AVUM third cutoff


The AVUM fourth stage shuts down to begin a 41-minute coast phase before its next burn.

T+01:35:20 – Fourth AVUM ignition


The AVUM main engine ignites a fourth time for a 64-second burn.

T+01:36:24 – AVUM fourth cutoff


The RD-843 engine shuts down after reaching an orbit with an altitude of 447 miles (720 kilometers) and an inclination of 98 degrees. By this point in the mission, the Vega rocket has completed one orbit of the Earth and is flying over the west coast of South America.

T+01:37:37 – Venµs separation


The 582-pound (264-kilogram) Venµs environmental satellite deploys from the Vega rocket's upper stage. The AVUM upper stage will ignite again at T+plus 1 hour, 47 minutes, for a de-orbit burn.
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tnt22

Цитировать @CwG_NSF 2 мин. назад

T-2hrs until the #Vega launch of two Israeli-built satellites. All is proceeding well with the count. #VV10 #Optsat3000 #Venus #Israel

tnt22

Цитировать Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

The tech demo mission of VENµS will test out a Hall Effect Thruster for a major orbit change & drag compensation in Low Earth Orbit.

tnt22

Цитировать‏ @CwG_NSF 8 мин. назад

T-1hr 15mins & counting. Launch time is activating telemetry transmitter on #Vega & the transponders and receptors. #VV10 @Arianespace @esa

tnt22


tnt22

Цитировать Spaceflight101 LIVE‏ @S101_Live 1 мин назад

One hour to tonight's instantaneous launch opportunity for #Vega, carrying two satellites into two different orbits. http://bit.ly/2f4pjC4

tnt22

Цитировать‏ @CwG_NSF[/url] 5 мин. назад

Tonight's #Vega has an instantaneous launch window of 01:58:33 UTC (21:58:33 EDT). No chance for a launch delay. #VV10 #OPTSAT3000 #Venus

tnt22

Цитировать‏ @CwG_NSF 2 мин. назад

T-50mins. Launch team is verifying that the launcher system is ready. #Vega #VV10 #OPTSAT3000 #VENUS


Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

L-50 Minutes: #Vega should now be in the proper configuration for the Synchronized Countdown Sequence starting at T-4 minutes.


tnt22

Цитировать08/02/2017 04:23
T-minus 35 minutes and counting. There continue to be no problems reported in the countdown for launch of Vega tonight. Liftoff is set for 0158:33 GMT (9:58:33 p.m. EDT; 10:58:33 p.m. local time) from French Guiana.


tnt22

Цитировать8/02/2017 04:30
T-minus 28 minutes. Some statistics on today's flight:
    [/li]
  • 10th Vega launch
  • 2nd Vega launch of 2017
  • 8th launch from Guiana Space Center in 2017
  • 35th launch from the ELA-1/SLV launch pad
  • 3rd and 4th Israel Aerospace Industries satellites to be launched by Arianespace
  • 291st Arianespace mission

tnt22

Цитировать08/02/2017 04:31
The Vega rocket has just one second to launch tonight or else liftoff will be delayed to another day. The time is fixed for 0158:33 GMT (9:58:33 p.m. EDT; 10:58:33 p.m. French Guiana time).

tnt22

#78

tnt22

Цитировать08/02/2017 04:40
Minus-17 minutes. The Optsat 3000 and Venµs satellites should be transitioning to internal battery power at this time.