Автор Salo, 12.10.2009 02:02:17
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ЦитатаНа моей памяти Delta IV вовремя почти никогда не улетала.
ЦитатаThe launch of the Air Force's Delta 4 Wideband Global SATCOM 3 (WGS 3) mission is now targeted for December 5 with a launch window of 7:23-8:47 p.m. EST.After evaluating the situation, mission managers believe this will give the launch team the time required to replace an electronics card that is part of the ground equipment used to monitor telemetry data from the Delta 4 and related systems for the launch. An anomaly with this monitoring system hardware led to the scrub of the first launch attempt December 3.
ЦитатаFRIDAY, DECEMBER 4, 2009After resolving a minor technical glitch and waiting out rainy weather, the Delta 4 rocket is targeting a Saturday evening blastoff from Cape Canaveral to deploy a sophisticated communications satellite for the U.S. military. Liftoff from Complex 37 will be possible during an 84-minute window extending from 7:23 to 8:47 p.m. EST (0023-0147 GMT). Air Force officials said late Friday that the faulty electronics card has been replaced in a piece of ground support equipment used to monitor telemetry data. The issue arose during Thursday's countdown, ultimately leading to the launch postponement. A gloomy weather forecast caused Wednesday's original launch opportunity to be scrapped in advance and unfavorable conditions were a problem during Thursday's countdown as well. Persistent rain fell all day on Friday and meteorologists are giving only 40 percent odds of acceptable weather during Saturday night's try. Once the rocket does fly, it will perform a 40-minute ascent to supersynchronous transfer orbit to launch the Air Force's third Wideband Global SATCOM communications spacecraft, known as WGS 3. WGS satellites are giving a major upgrade to the military's main communications infrastructure, replacing the aging Defense Satellite Communications System spacecraft. Each WGS has 10 times the capacity of a DSCS satellite, allowing users to process and receive data quicker than ever before. The new WGS 3 satellite will be positioned above the Eastern Atlantic at an orbital slot of 12 degrees West longitude to serve the U.S. European Command and U.S. Africa Command, plus lend additional support over the Middle East. WGS 1 entered service last year to cover the vast Pacific Command that spans the U.S. western coast all the way to Southeast Asia. The WGS 2 satellite launched earlier this year was placed into operation over the Indian Ocean for use by U.S. Central Command to provide coverage for the warfighters in Afghanistan, Iraq and other parts of Southwest Asia.
ЦитатаDelta 4 rocket aims for Saturday night launchAfter resolving a minor technical glitch and waiting out rainy weather, the Delta 4 rocket is targeting a Saturday evening blastoff from Cape Canaveral to deploy a sophisticated communications satellite for the U.S. military.
Цитата1345 GMT (8:45 a.m. EST)The second launch attempt is officially underway at Cape Canaveral today for the Delta 4 rocket that will place the third Wideband Global SATCOM military satellite into Earth orbit. Ground technicians have rolled the 330-foot tall mobile service tower away from the rocket, retracting the wheeled structure along rail tracks to its launch position about the length of a football field away from the Delta 4. The 9-million pound tower shielded the rocket from the elements during the stay on the pad, provided workers 360-degree access to the various areas on the vehicle and was used to attach the strap-on solid motors and the payload during the launch campaign. The tower is 90-feet wide and 40-feet deep. Crews will spend the next couple of hours securing the complex for launch before leaving the danger area around the pad. All workers must be clear of the area for the start of hazardous operations in the countdown, which include fueling the vehicle later this afternoon. Liftoff remains scheduled for 7:23 p.m. EST.
Цитата2100 GMT (4:00 p.m. EST)Fast-fill just finished for the first stage liquid hydrogen tank. 2057 GMT (3:57 p.m. EST)Live streaming video of the Delta 4 rocket can be viewed on your iPhone. Check it out! 2047 GMT (3:47 p.m. EST)The chilldown of the upper stage stage liquid hydrogen system is reported complete, clearing the way for loading the rocket's tank. 2043 GMT (3:43 p.m. EST)The "go" has been given for the upper stage liquid oxygen chilldown in advance of fueling. 2039 GMT (3:39 p.m. EST)The loading of liquid oxygen into the Common Booster Core first stage has been completed. The launch team will conduct vent and valve checks before putting the tank into topping mode. 2030 GMT (3:30 p.m. EST)Complex 37 has two giant sphere-shaped fuel tanks to store the cryogenic liquid oxygen and liquid hydrogen. The LOX tank holds 250,000 gallons and LH2 sphere about 850,000 gallons. Complex 37 has two giant sphere-shaped fuel tanks to store the cryogenic liquid oxygen and liquid hydrogen. The LOX tank holds 250,000 gallons and LH2 sphere about 850,000 gallons. The cryogenics are fed from the storage tanks through pipelines to the pad. For the Common Booster Core, the propellants are routed up to the launch table upon which the rocket sits. Tail service masts, the large box-like structures at the base of the vehicle, feed the oxygen and hydrogen to the booster via separate umbilicals. The upper stage will be filled in a little while. It receives the cryos from the middle swing arm that extends from the Fixed Umbilical Tower to the front-side of the rocket. 2023 GMT (3:23 p.m. EST)The launch team has gotten the approval to start chilldown conditioning of the upper stage liquid hydrogen system. 2020 GMT (3:20 p.m. EST)First stage liquid oxygen loading continues in progress. The rocket's tank will be loaded with 40,000 gallons of the supercold oxidizer that's chilled to Minus-298 degrees F. 2017 GMT (3:17 p.m. EST)The countdown sequence is on schedule and no problems are being worked, the launch team reports. 2009 GMT (3:09 p.m. EST)First stage liquid hydrogen tanking operation is switching from "slow-fill" to "fast-fill" mode. Some 110,000 gallons of LH2 will load up the rocket's tank. 1954 GMT (2:54 p.m. EST)The first stage liquid oxygen and liquid hydrogen loading in "slow-fill" mode has commenced. 1951 GMT (2:51 p.m. EST)The cold gas chilldown conditioning of the liquid hydrogen system has been accomplished. Liquid hydrogen propellant will start to flow into the first stage in "slow-fill" mode. That is sped up to "fast-fill" after a small portion of the tank is loaded. Chilled to Minus-423 degrees Fahrenheit, the liquid hydrogen will be consumed by the RS-68 main engine along with liquid oxygen during the first four minutes of the launch. 1947 GMT (2:47 p.m. EST)The first stage liquid oxygen chilldown is complete. Fueling is beginning in the "slow-fill" mode to load a small percentage of the tank. The process then speeds up to the "fast-fill" mode until the tank is nearly full. 1939 GMT (2:39 p.m. EST)A little less than five hours until liftoff time. No significant technical issues are being tracked and the launch team is active with the thermal conditioning of the first stage for fueling. 1926 GMT (2:26 p.m. EST)A "go" has been given to start the cold gas chilldown conditioning of the first stage liquid hydrogen system. 1920 GMT (2:20 p.m. EST)Chilldown of the first stage liquid oxygen system is beginning. This preps the tank and pumping to guard against shock when the supercold oxidizer begins flowing into the rocket a short time from now. 1917 GMT (2:17 p.m. EST)The launch director has given approval for the start of fueling operations. 1858 GMT (1:58 p.m. EST)A reminder that if you will be away from your computer but would like to receive occasional countdown updates, sign up for our Twitter feed to get text message updates on your cellphone. U.S. readers can also sign up from their phone by texting "follow spaceflightnow" to 40404. (Standard text messaging charges apply.) 1853 GMT (1:53 p.m. EST)T-minus 5 hours, 15 minutes and counting! The Terminal Countdown has commenced for this evening's scheduled launch of the Delta 4 rocket to deliver a new communications satellite into orbit for the United States military. The countdown has one planned built-in hold at T-minus 5 minutes lasting some 15 minutes, leading to liftoff at 7:23 p.m. EST (0023 GMT). The launch pad has been verified evacuated of all personnel in advance of fueling the rocket's two stages this afternoon. Pad systems and equipment stand ready for fueling activities, which should kick off shortly. 1843 GMT (1:43 p.m. EST)Checks of the C-band beacon are beginning. This system is used in tracking the rocket during the flight downrange. 1839 GMT (1:39 p.m. EST)The launch team has been polled to verify all consoles are manned and ready to begin the Terminal Countdown when this hold ends at 1:53 p.m. A briefing on countdown procedures is now underway. 1835 GMT (1:35 p.m. EST)The weather officer says the thick clouds and rain have moved to the south and east of Complex 37, giving more optimism about the chances for a launch today. It remains a gloomy overcast sky at the Cape. But meteorologists report the low clouds are thin and not violating any of the weather criteria. At the present time, the weather is "go" for launch. The main worry for this evening will be the winds. Overall, the odds of acceptable weather during the 7:23 to 8:47 p.m. EST launch window have improved to 60 percent. The revised launch forecast calls for some broken decks of clouds at 4,000 and 8,000 feet, good visibility, northwesterly winds of 15 peaking to 20 knots and a temperature around 56 degrees F. The outlook for Sunday night, if the launch should slip 24 hours for some reason, is 80 percent favorable with lighter winds and scattered clouds. 1808 GMT (1:08 p.m. EST)The call to "man stations for Terminal Count" just went out to the launch team. 1753 GMT (12:53 p.m. EST)T-minus 5 hours, 15 minutes and holding. The countdown has just entered a planned 60-minute built-in hold, giving the team time to catch up on any work that could be running behind schedule. Once the clocks resume ticking at 1:53 p.m. EST, the Terminal Countdown phase of today's launch operation will begin. 1725 GMT (12:25 p.m. EST)Here's some fresh photos taken this morning at pad 37B as the second launch attempt began. See the gallery. 1700 GMT (12:00 p.m. EST)The cold front passed over the launch site a short time ago, producing some wind gusts around 29 knots as a light, constant rain continues to fall over the Space Coast. But the launch weather officer says with the front now moving on southward, the winds should settle down this afternoon to the 20-22 knot range and the rain will end. For the rest of the countdown and this evening's launch window, the concerns will be the thickness of the clouds overhead and surface winds hovering around the liftoff constraint of 20 knots. Meteorologists are hopeful that the clouds will thin and scatter out this afternoon and they'll be keeping a close eye on the wind speeds at the pad.
Цитата2223 GMT (5:23 p.m. EST)Launch of the Delta 4 rocket with the third Wideband Global SATCOM spacecraft is just two hours away. The first two WGS satellites were hauled into space aboard Atlas 5 rockets. But WGS 3 is riding atop the Delta 4, the other rocket in the Air Force's Evolved Expendable Launch Vehicle fleet. Both vehicles are produced by United Launch Alliance, the firm created three years ago this month that joined Lockheed Martin's Atlas and Boeing's Delta rockets under one organization. "This mission is symbolic of why ULA formed for a couple of reasons," says James Bell, ULA's WGS mission manager. "First, it exemplifies why the government brought the Atlas and Delta programs together. The first two WGS satellites were launched on our Atlas vehicles and for WGS 3, instead of our Delta 4 team having to start from scratch, ULA was proactive in implementing a seamless integration and processing services for this repeat customer. "Also, because I was the WGS mission manger for those two Atlas launches, I was able to share the knowledge we gained from those launches with our Delta team. This is not only a tremendous benefit for ULA but also for our Air Force mission partners who are relying on us to provide them assured access to space. This simply wasn't possible prior to ULA. "Second, this mission marks the 36th launch for ULA in 36 months, which is quite a record of reliability and mission success. When ULA was formed, our primary goal was to provide safe and reliable assured access to space with mission success paramount in everything we do." 2219 GMT (5:19 p.m. EST)The upper stage liquid oxygen tank has been filled up, now making the Delta 4 a fully fueled rocket. 2209 GMT (5:09 p.m. EST)For the first time in a couple of days at the Cape, the clouds are giving way to the sun. This low overcast is sliding out! 2157 GMT (4:57 p.m. EST)The first stage liquid hydrogen tank is being placed into its topping phase. 2153 GMT (4:53 p.m. EST)Now entering the last two-and-a-half hours of the countdown. Fueling of the Delta 4 rocket continues in work for the 7:23 p.m. EST launch of the WGS 3 military communications satellite from Cape Canaveral, Florida. 2140 GMT (4:40 p.m. EST)A status check of the fueling activities shows the fast-fill loading to the upper stage liquid hydrogen tank just ended. The launch team continues to load the liquid oxygen supply to the stage. 2123 GMT (4:23 p.m. EST)The upper stage conditioning on the liquid oxygen side has finished. Loading of the tank is starting. This is the last of the rocket's four cryogenic supplies to be filled in today's countdown to launch. 2115 GMT (4:15 p.m. EST)Post-filling tests on the first stage liquid oxygen system are complete and the tank is going into topping mode. 2112 GMT (4:12 p.m. EST)The official launch weather forecast has removed the concern for thick clouds for tonight. A line of clearing is making its way toward the Cape, there's no rain in the area and the surface winds remain below limits. The upper wind conditions are being closely watched, however, due to a strong wind shear up through 15,000 feet. A pre-planned series of weather balloons will be released throughout the countdown to monitor the direction and speed of the winds for engineers to select the best flight profile for launch. 2107 GMT (4:07 p.m. EST)After finishing up work on the first stage liquid oxygen side, the launch team is moving into the chilldown procedures for the upper stage liquid oxygen system.
Цитата0011 GMT (7:11 p.m. EST Sat.)DELAY. Liftoff will not occur at 7:23 p.m. because upper level wind conditions have been declared "no go" again. 0010 GMT (7:10 p.m. EST Sat.)The launch team will be polled in the next minute to confirm all systems are "go" to press onward for 7:23 p.m. EST liftoff.0008 GMT (7:08 p.m. EST Sat.)The WGS 3 spacecraft atop the Delta 4 is switching from ground-fed power to its internal batteries for launch. 0007 GMT (7:07 p.m. EST Sat.)Our live video stream of the launch is back after a technical glitch. Just hit reload to this page. 0003 GMT (7:03 p.m. EST Sat.)T-minus 5 minutes and holding. The countdown has entered the planned 15-minute hold leading toward the 7:23 p.m. EST liftoff of the Delta 4 rocket. This pause is designed to give the launch team the opportunity to catch up on any work running behind schedule and verify all is in readiness for the final moments of the count. A series of management polls will be conducted during the hold to give approval to proceed with the launch. 0002 GMT (7:02 p.m. EST Sat.)The final guidance update on upper level winds is being loaded into the rocket. At the current time, the winds are acceptable. 2358 GMT (6:58 p.m. EST)For those looking to watch the ULA broadcast of the launch, here's a link. 2351 GMT (6:51 p.m. EST)The external inspections of the Delta 4 rocket's thermal insulation following fueling has been completed without any issues of note. 2344 GMT (6:44 p.m. EST)Current observations show no violation of the cloud rules, there's no rain in the area and ground winds are within limits. The upper level winds are the only issue being watched. 2338 GMT (6:38 p.m. EST)T-minus 30 minutes and counting. The countdown is headed to the T-minus 5 minute point where a 15-minute hold is planned. Liftoff is targeted for 7:23 p.m., the opening of today's 84-minute launch window. 2334 GMT (6:34 p.m. EST)The engine slew checks have been performed successfully. The test sequence started with the upper stage RL10 engine, followed by the first stage RS-68 engine gimbaling and then some commanding checks for the strap-on solid rocket motors. 2330 GMT (6:30 p.m. EST)A reminder that if you will be away from your computer but would like to receive occasional countdown updates, sign up for our Twitter feed to get text message updates on your cellphone. U.S. readers can also sign up from their phone by texting "follow spaceflightnow" to 40404. (Standard text messaging charges apply.) 2328 GMT (6:28 p.m. EST)No technical issues are being reported in the countdown and the team remains on the timeline for launch at 7:23 p.m. EST. 2327 GMT (6:27 p.m. EST)The propellant conditioning has been completed on all four cryogenic tanks. The Delta 4 rocket is fueled up and ready for today's launch window to open. 2323 GMT (6:23 p.m. EST)Now moving into the final 60 minutes of the countdown. This launch will deliver to orbit the third satellite in the Wideband Global SATCOM series. Although more spacecraft are under construction in the Block 2 phase of the program, today's deployment of WGS 3 marks the last satellite in Block 1. "The upcoming launch of WGS is really a landmark achievement for the DOD and The Boeing Company. It completes the initial constellation of three WGS satellites that will provide vital, flexible, high-capacity communications to the U.S. warfighters and allies across the theaters of operation," said Mark Spiwak, the WGS program director at Boeing. Boeing shipped the WGS 3 satellite from its factory in El Segundo to Cape Canaveral on September 28. Over the past two months, the craft underwent final testing, fueling and encapsulation in the shroud that will cover it during launch. On November 14, the spacecraft was transported from the Astrotech processing facility in Titusville to Complex 37 where it was hoisted atop the Delta 4 rocket. "It's ready to join its brothers in arms -- WGS 1 and 2 -- in providing this capability to the men and woman of our armed forces. We look forward to a great ride from ULA," said Spiwak. The company has three additional WGS satellites currently in production for launches slated to start in 2011. "On behalf of The Boeing Company, we are very proud to be providing them to the United States Air Force. They are a key element in the very highly flexible and capable system providing this quantum leap in communications for the warfighter." 2320 GMT (6:20 p.m. EST)The engine steering tests are getting underway. 2318 GMT (6:18 p.m. EST)The RS-68 first stage main engine spin start pressurization operation is about to start. 2310 GMT (6:10 p.m. EST)The streaming video on the right-hand side of this page is having technical difficulties. But while we work on that, our iPhone feed can be watched on your computer if you have the latest version of QuickTime installed. Check it out! 2300 GMT (6:00 p.m. EST)The safety system checks are being performed at this point in the countdown. 2253 GMT (5:53 p.m. EST)The launch team is entering the last 90 minutes of the countdown. With fueling of the Delta 4 rocket completed, team members are monitoring systems while the clocks tick down. In the immediate future, the rocket's safety system will be checked and a series of engine steering tests will occur. Everything continues to proceed on schedule at Cape Canaveral for liftoff at 7:23 p.m. EST. The upper level winds are the main thing being watched right now. 2240 GMT (5:40 p.m. EST)Engineers are conducting the standard evaluation of the Delta 4 rocket's thermal insulation following the loading of supercold propellants into the vehicle.
Цитата0017 GMT (7:17 p.m. EST Sat.)A new target liftoff time has not yet been established. The countdown remains holding at T-minus 5 minutes. Tonight's launch window extends from 7:23 to 8:47 p.m. EST.
Цитата0024 GMT (7:24 p.m. EST Sat.)NEW LAUNCH TIME. Liftoff has been retargeted for 8:00 p.m. EST. That will allow the team to receive and process new weather balloon data on the winds aloft.
Цитата0024 GMT (7:24 p.m. EST Sat.)NEW LAUNCH TIME. Liftoff has been retargeted for 8:00 p.m. EST. That will allow the team to receive and process new weather balloon data on the winds aloft.
Цитата0043 GMT (7:43 p.m. EST Sat.)The revised data file is being loaded into the Delta 4 rocket's guidance computer based on the latest upper level wind information. 0041 GMT (7:41 p.m. EST Sat.)The team is complete with all of its procedures up to the Launch Minus 10-minute point. Pending a "go" on upper level winds, countdown activities would restart at 7:50 p.m. in preparation for a liftoff at 8:00 p.m. EST.
Цитата0053 GMT (7:53 p.m. EST Sat.)DELAY. The launch will be pushed back from the 8:00 p.m. EST target. The latest balloon has shown "no go" conditions. 0051 GMT (7:51 p.m. EST Sat.)The final readiness polls have been completed and all team members voiced "ready" status for continuing the countdown except for one. Officials are waiting on confirmation of acceptable upper level winds based on the next balloon. 0050 GMT (7:50 p.m. EST Sat.)The launch team is being polled to confirm all systems are "go" to press onward for 8:00 p.m. EST launch.
ЦитатаDELAY. The launch will be pushed back from the 8:00 p.m. EST target. The latest balloon has shown "no go" conditions in comparison to the previous data run.