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ЦитатаVega | July 10, 2019Flight VV15: New launch dateWith the weather conditions improving over the Guiana Space Center, Arianespace has decided to initiate the chronology operations for its launch of Flight VV15.The new targeted liftoff timing for the United Arab Emirates' FalconEye1 satellite is Wednesday, July 10, 2019, at precisely:[/li]9:53:03 p.m., Washington D.C., USA time10:53:03 p.m., Kourou, French Guiana time1:53:03 Universal Time (UTC), on July 113:53:03 a.m., Paris, France time, on July 115:53:03 a.m., Abu Dhabi, United Arab Emirates (UAE) time, on July 11.The Vega launch vehicle and its FalconEye1 spacecraft payload are in stable and safe conditions.
ЦитатаVega | July 10, 2019The launch chronology is underway for today's Flight VV15 with VegaArianespace has initiated the launch chronology operations for Flight VV15 as weather conditions are improving over the Spaceport in French Guiana.The new targeted liftoff for the Vega launcher with its FalconEye1 satellite payload is at the following precise timing:[/li]9:53:03 p.m., Washington D.C., USA time (July 10)10:53:03 p.m., Kourou, French Guiana time (July 10)1:53:03 Universal Time (UTC) (on July 11)3:53:03 a.m., Paris, France time (on July 11)5:53:03 a.m., Abu Dhabi, United Arab Emirates (UAE) time (on July 11).The FalconEye1 satellite is a high performance optical Earth-observation platform for the United Arab Emirates. It was manufactured by Airbus Defence and Space as prime contractor and Thales Alenia Space as co-prime.
ЦитатаArianespace @Arianespace 1 ч. назадIt's launch day! Liftoff of #Vega Flight #VV15, carrying the #FalconEye1 Earth observation satellite for United Arab Emirates, is planned from French Guiana at 10:53:03 p.m. local time. Watch live on http://Arianespace.com and #YouTube!https://video.twimg.com/tweet_video/D_INFoDXkAAdmJT.mp4
Цитата07/10/2019 18:07 Stephen ClarkAfter a five-day delay to wait for improved high-altitude wind conditions, Arianespace is proceeding with final preparations in French Guiana in advance of a launch attempt with a Vega rocket at 9:53:03 p.m. EDT (0153:03 GMT).The 98-foot-tall (30-meter) Vega launcher will loft the Falcon Eye 1 military spy satellite for the United Arab Emirates.Liftoff is set for 10:53 p.m. local time in French Guiana. Скрытый текст: Arianespace originally planned to launch the mission Friday night, but unfavorable winds aloft kept the rocket grounded. Stephane Israel, Arianespace's CEO, said this morning that officials are proceeding with a countdown today.The four-stage Vega rocket will place the Falcon Eye 1 spacecraft in a 379-mile-high (611-kilometer) sun-synchronous orbit flying over Earth's poles, enabling global imaging coverage during the satellite's mission.Falcon Eye 1 is the first of two Falcon Eye reconnaissance satellites ordered by the UAE under an agreement negotiated in 2013. Airbus Defense and Space built the two satellites, and Thales Alenia Space -- usually an Airbus competitor -- provided the optical imaging payload for each spacecraft under a contract valued at roughly 800 million euros, or about $1.1 billion at 2013 exchange rates.The agreement was brokered with the backing of the French government, but a security review by the U.S. government delayed the final signature of the contract between the UAE, Airbus and Thales until 2014. The satellites use some U.S.-made components, prompting the Obama administration to put a temporary hold on the deal until officials ultimately approved the export of the U.S. parts for use by the UAE military.The Falcon Eye satellites are based on the French Pleiades Earth-imaging satellites launched in 2011 and 2012.Falcon Eye 1 weighs 2,638 pounds (1,197 kilograms) fully fueled for launch on the Vega rocket. The identical Falcon Eye 2 spacecraft will launch on another Vega flight later this year.The launch will be the 15th flight of a Vega rocket, developed primarily in Italy by Avio, since its debut in February 2012. It will be the sixth launch by Arianespace this year.
Цитата07/11/2019 00:40 Stephen ClarkThe final countdown for tonight's launch began at 1618 GMT (12:18 p.m. EDT). Power-up of the Vega rocket began around 1928 GMT (3:28 p.m. EDT) to begin testing of its on-board computer and navigation systems.Meanwhile, ground teams have switched on Falcon Eye 1 to confirm its readiness for tonight's ride into orbit. Скрытый текст: The computer was to be tested and loaded with the mission's flight software program around 2048 GMT (4:48 p.m. EDT), and the Vega's navigation was to be aligned and verified functional at around 2058 GMT (4:58 p.m. EDT).The launch team will receive a weather briefing before rollback of the Vega launch facility's mobile gantry at 2213 (6:13 p.m. EDT). The launch pad's mobile service tower will be retracted into launch position, rolling on rails to a point 260 feet (80 meters) from the Vega rocket.The launcher's navigation system was to be tested again at 2303 GMT (7:03 p.m. EDT), and Vega's telemetry transmitters and transponders were set to be activated after the rollback of the launch pad gantry around 0038 GMT (8:38 p.m. EDT).Engineers will verify the readiness of Vega's systems at 0103 GMT (9:03 p.m. EDT), and a final pre-launch weather briefing is scheduled for 0143 GMT (9:43 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.The Vega's solid-fueled P80FW first stage, producing a maximum of 683,000 pounds of thrust, burns out 114 seconds after liftoff, giving way to the launcher's Zefiro 23 second stage at an altitude of about 33 miles (53 kilometers). After a 103-second burn, the second stage consumes its propellant 3 minutes, 38 seconds, after launch and separates. The Vega's third stage, the Zefiro 9 motor, ignites 3 minutes, 51 seconds, into the mission. A few seconds later, Vega's Swiss-built 8.5-foot-diameter (2.6-meter) payload fairing will jettison. Vega's third stage fires for more than two minutes, turning off and separating 6 minutes, 32 seconds after liftoff. The fourth stage, known as AVUM, ignites its liquid-fueled Ukrainian RD-843 engine at Plus+8 minutes, 28 seconds into the mission, burning for nearly eight minutes to reach a transfer orbit above Earth. After coasting for nearly 39 minutes, the AVUM fourth stage will fire again at Plus+54 minutes, 58 seconds for more than a minute to reach a circular orbit for deployment of the Falcon Eye 1 spacecraft.Separation of the Falcon Eye 1 satellite is scheduled for 57 minutes, 9 seconds after liftoff.A third ignition of the upper stage engine will de-orbit the rocket to guard against the creation of space junk.
ЦитатаVega launch timeline with Falcon Eye 1July 10, 2019 | Stephen ClarkThe Falcon Eye 1 military reconnaissance satellite for the United Arab Emirates is set to ride a Vega launcher into a 379-mile-high (611-kilometer) orbit Wednesday night from French Guiana on a mission that will take less than one hour from liftoff until spacecraft separation.Liftoff is scheduled for July 10 at 9:53:03 p.m. EDT (0153:03 GMT on July 11) from the Vega launch pad at the Guiana Space Center, located on the northeastern coast of South America. The Vega launcher, primarily developed and built in Italy, will head north over the Atlantic Ocean to deliver the Falcon Eye 1 imaging satellite into a sun-synchronous orbit flying from pole-to-pole.It will be the 15th flight of a Vega rocket, and the second Vega mission of 2019. Скрытый текст: T+00:00:00 - LiftoffThe 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 1The Vega rocket surpasses the speed of sound as it soars on a northerly trajectory from French Guiana. The rocket will reach Max-Q, the point of maximum aerodynamic pressure, at T+plus 53 seconds.T+00:01:54 - First stage separationHaving 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 103-second firing.T+00:03:38 - Second stage separationThe Zefiro 23 motor burns out and jettisons.T+00:03:51 - Third stage ignitionMoving 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+00:03:56 - Fairing separationThe Vega's 8.5-foot-diameter (2.6-meter) payload fairing is released as the rocket ascends into space.T+00:06:32 - Third stage separationThe Zefiro 9 third stage shuts down and separates, having accelerated the rocket to nearly orbital velocity.T+00:08:28 - First AVUM ignitionThe 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+00:16:23 - AVUM first cutoffThe Vega's AVUM fourth stage is turned off after an 7-minute, 55-second burn, beginning a nearly 39-minute coast until the engine is ignited again.T+00:54:58 - Second AVUM ignitionThe AVUM fires a second time for a 69-second burn to put the Falcon Eye 1 satellite into its targeted orbit.T+00:56:07 - AVUM second cutoffThe AVUM engine shuts down after reaching a circular sun-synchronous orbit with an altitude of 379 miles (611 kilometers).T+00:57:09 - Falcon Eye 1 separationThe UAE military's Falcon Eye 1 observation satellite separates from the Vega's AVUM upper stage.
Цитата07/11/2019 04:29 Stephen ClarkT-minus 24 minutes. Some statistics on today's flight:[/li]15th Vega launch2nd Vega launch of 20196th launch from Guiana Space Center in 201940th launch from the ELA-1/SLV launch pad131st Airbus-built satellite launched by Arianespace1st Arianespace mission for the UAE Armed Forces311th Arianespace mission
Цитата07/11/2019 04:30 Stephen ClarkT-minus 23 minutes. Tonight's mission from liftoff through deployment of the Falcon Eye 1 Earth observation satellite in the proper orbit will last more than 57 minutes, including two firings by the Vega rocket's AVUM upper stage engine to place the spacecraft at the correct altitude and inclination.Only then can Arianespace officials declare success on tonight's launch, the company's sixth of the year, and the second of 2019 to use the light-class Vega launcher.
Цитата07/11/2019 04:33 Stephen ClarkT-minus 20 minutes. The Vega rocket has just one second to launch tonight or else liftoff will be delayed to another day. The time is fixed for 0153:03 GMT (9:53:03 p.m. EDT; 10:53:03 p.m. French Guiana time).