MUOS-5 – Atlas V 551 (AV-063) – Канаверал SLC-41 – 24.06.2016

[Apollo13]

Старый пишет:

"Atlas V возвращается к полету, запланированному на 24 июня вместе с пятью военными спутниками связи

   

Это уже супертяж какой-то

[che wi]

Apollo13 пишет:

Старый пишет:

"Atlas V возвращается к полету, запланированному на 24 июня вместе с пятью военными спутниками связи

     

Это уже супертяж какой-то  

Не, пять военных кубсатов MUOS )

[Старый]

Кубосат форм-фактора МU.

[Старый]

А накосячил то оказывается всётаки наш регулятор.

[Salo]

http://spaceflightnow.com/2016/06/20/weather-forecast-looks-good-for-fridays-atlas-5-rocket-launch/

Weather forecast looks good for Friday's Atlas 5 rocket launch             
 June 20, 2016 Justin Ray            
 
File photo of the last Atlas/MUOS launch in September. Credit: ULA

CAPE CANAVERAL — Air Force meteorologists are giving good odds of acceptable weather conditions for the United Launch Alliance Atlas 5 rocket to fly Friday morning from Cape Canaveral to put a Navy mobile communications satellite into orbit.
Liftoff from Complex 41 is scheduled during a 44-minute window stretching from 10:30 to 11:14 a.m. EDT (1430-1514 GMT).
In their initial launch weather outlook issued this morning, forecasters are concerned only about cumulus clouds. They say thunderstorms won't fire up until after the launch window ends.
There is an 80 percent percent of favorable conditions.

"For MLP roll Thursday, light southerly to southwesterly winds are expected through the roll period. By late morning and with diurnal heating, winds become on-shore as the seabreeze develops and serves as a focus for showers and isolated thunderstorms near the coast before transitioning inland by early to mid-afternoon," Air Force weather forecasters say.
"On launch day, similar conditions persist with late morning and early afternoon showers and isolated thunderstorms developing near the coast and migrating inland with the seabreeze early to mid-afternoon. Light southwesterly winds during the count become southerly during the window with gusts in the low teens."
The launch window specifics include just some scattered low- and high-level clouds, good visibility, southerly winds of 10 to 13 knots and a temperature of 85 degrees F.
If the launch slips to Saturday morning for some reason, similar conditions are expected with 80 percent odds of acceptable weather.

[Salo]

James Dean Подлинная учетная запись ‏@flatoday_jdean
Weather forecast 80% favorable for 10:30am ET Friday launch of Atlas V, #MUOS-5: http://1.usa.gov/28L9KtH . Window open to 11:14am.

[Salo]

http://spaceflightnow.com/2016/06/21/atlas-5-launching-muos-5-for-mobile-forces-across-all-branches-of-u-s-military/

Atlas 5 launching MUOS 5 for mobile forces across all branches of U.S. military             
 June 21, 2016 Justin Ray
 
MUOS 5 in the factory. Credit: Lockheed Martin

CAPE CANAVERAL — For the fifth time in four years, a massive U.S. Navy satellite will launch atop an Atlas 5 rocket on Friday to finish the military's new $7.7 billion mobile communications framework 22,300 miles in space.
Liftoff of the United Launch Alliance rocket fr om Complex 41 at Cape Canaveral in Florida is scheduled during a 44-minute window stretching fr om 10:30 to 11:14 a.m. EDT (1430-1514 GMT).
The rocket will head eastward along an initial flight azimuth of 94.58 degrees.
It will mark the 645th launch for the Atlas program since 1957, the 350th Atlas launch from Cape Canaveral and the 234th Atlas-Centaur rocket.
Weather forecasters give an 80 percent chance of favorable conditions, saying that summertime thunderstorms shouldn't fire up until after the launch window.
The MUOS satellite No. 5 will augment the globe-spanning constellation of Mobile User Objective System spacecraft as an in-orbit spare, joining four earlier craft launched by Atlas since 2012 that comprise the primary fleet.
"This launch is a significant event for the entire MUOS team because it will complete the five-satellite constellation. Not only will we have global coverage and further north and south towards the poles than ever before, but we also will have the assurance of an on-orbit spare," said Navy Capt. Joe Kan, program manager for the Communications Satellite Program Office and MUOS program manager. "If anything should happen to one of the four satellites in orbit, we would be prepared to maintain coverage around the world."
 
An artist's concept of MUOS 5 in orbit. Credit: Navy

The network will enable secure phone calls, classified data transfers and video on demand by military forces aboard ships, submarines, aircraft and land vehicles, plus terminals in the hands of troops while on the move.
MUOS uses Internet Protocol versions 4 and 6 (IPv4/IPv6) to give the warfighter worldwide roaming connectivity to the Global Information Grid.
"This network access for deployed tactical users will allow the exchange of critical situational awareness and targeting information," said Navy Commander Peter Sheehy, principal assistant program manager of MUOS.
"As a Naval pilot, MUOS will really bring that expanded communications chain and allow us to coordinate with forward air controllers, those tactical controllers who need air support, at a much greater range. So it will be less time over the target area. We will be able to get there, provide the support and leave."
This launch comes after engineers traced the first stage performance trouble on the last Atlas launch to a misbehaving fuel mixture control valve. The hardware on the MUOS 5 rocket has been tweaked to prevent a reoccurrence.
The United Launch Alliance vehicle, flying in its most powerful 551 configuration with five solid rocket boosters flanking the first stage, will lift the 15,000-pound payload into a high-perigee geosynchronous transfer orbit.
The 551 rocket variant has flown six times in 10 years, launching NASA's New Horizons probe in 2006 to Pluto and beyond, the agency's Juno spacecraft in 2011 that will enter orbit around Jupiter on July 4 and the MUOS fleet.
The Atlas 5 rocket with MUOS 5 aboard stands 206 feet tall and will weigh 1.3 million pounds at launch.
 
Launches of MUOS 1 thru 4. Credit: United Launch Alliance

The MUOS constellation is designed to extend narrowband communications services for the U.S. military beyond 2025. The satellites, built by Lockheed Martin in Sunnyvale, California, offer both Ultra High Frequency communications provided via older spacecraft and a new rugged smartphone system for mobile forces.
"The legacy satellite communication system allowed users to 'talk' as long as they were within the same satellite footprint," said Kan. "MUOS allows troops all over the world to talk, text and share mission data seamlessly without having to worry about wh ere they are in relation to a satellite."
Coverage to legacy users transmit through a 17.7-foot-diameter reflector on the craft and the advanced, multi-beam features of MUOS to significantly increase the transmission capacity over the Navy's previous satellites will use a large 46-foot reflector on MUOS.
"The legacy payload we have on MUOS satellites allows a smooth transition to a newer, better MUOS capability. We are benefitting from providing the legacy channels for current users and we are exploring all the capability that MUOS has to offer," said Nina Tran, the Navy program office's space division director.
As the spare satellite for the constellation, the unique mission for MUOS 5 immediately provides the legacy UHF communications while waiting for a future need to replace one of its sister-craft in the smartphone system.
This MUOS satellite will reside 22,300 miles over the Indian Ocean, alongside MUOS 4.
 
An artist's concept of the MUOS constellation. Credit: Navy

All U.S. military forces rely upon Navy satellites for Ultra High Frequency narrowband communications. UHF offers small, portable units that forces can carry into battle and the frequency enables communications in urban canyons and mountainous terrain, penetrating foliage and transmitting through bad weather.
The MUOS architecture includes the five satellites, four ground stations located in Western Australia, Sicily, Virginia and Hawaii and the complex software to make the system function.
"The nice thing about MUOS is that the ground system and terminals contain all the switching and routing technology," said Jim Parsons, the Navy program office's technical director.
"The satellite remains unchanged over time and can allow technology insertion into the ground stations and the waveform over time to increase capability without having to make any satellite changes."
After the geosynchronous orbit is reached, MUOS 5 will undergo critical deployments of the solar arrays to stretch 94 feet tip-to-tip and unfurling the two gold mesh antennas.
MUOS No. 1 was launched Feb. 24, 2012 aboard an Atlas 5 and serves as the Pacific Ocean satellite. MUOS No. 2 launched July 19, 2013 aboard another Atlas 5 and serves as the continental U.S. satellite. MUOS No. 3 went up atop an Atlas 5 on Jan. 20, 2015 to cover the Atlantic Ocean region. An Atlas 5 launched MUOS No. 4 on Sept. 2, 2015 to serve the Indian Ocean region.
The Navy has completed acceptance testing and activated UHF service aboard the first four MUOS satellites. MUOS 5 should be activated by Christmas.
Deployment of the radios and terminals for the smartphone system will be occurring over the next two years.
Discussions are underway with allied nations — Canada, Australia, the United Kingdom and the Netherlands — about buying into the network to gain access to the whole MUOS system. An additional satellite would be built with international funding to increase the MUOS capacity, if more countries join.
 
The Atlas 5 rocket and MUOS 5. Credit: United Launch Alliance

A typical Atlas 5 launch to geosynchronous transfer orbit, the standard dropoff point for communications satellites, uses just two firings by the Centaur to achieve the highly elliptical, egg-shaped orbit to deploy the payloads. From there, the satellites use their own engines in the subsequent days to fly into the operational locations 22,300 miles above the equator.
But the sizable MUOS drove planners to create a three-burn launch profile for the payload to use all of the available performance from the Atlas-Centaur that in turns saves the satellite's precious onboard fuel supply for maneuvering over its 15-year life.
The three burn mission design for MUOS provides 1,000 pounds greater lift capability than a conventional two-burn geosynchronous transfer orbit.
A preliminary parking orbit almost 400 miles high, tilted 28 degrees to the equator, is achieved just over 12 minutes into the launch as the Centaur shut down the engine and enters a brief cruise across the central Atlantic.
Just off the western coast of Africa, the Centaur main engine then restarts about 20 minutes after launch to propel MUOS to the second step on its way to the planned orbit. This six-minute burn puts the rocket into an elliptical 120 by 21,400 mile orbit inclined 26 degrees.
Then begins a lengthy coast away from the planet for two-and-a-half hours, flying to a point about 17,000 miles above the far eastern Indian Ocean wh ere the final burn occurs.
One last push is given nearly two hours and 49 minutes into flight to raise the orbit's low point and reduce the inclination closer to the equator. The burn, lasting a minute, places the payload into a high-perigee geosynchronous transfer orbit of 2,387 by 22,187 statute miles at an inclination of 19.10 degrees.
The satellite separates from Centaur some two hours and 54 minutes after liftoff to complete the launch, or 1:24 p.m. EDT (1724 GMT) given an on-time liftoff.
 
The MUOS 5 launch poster. Credit: United Launch Alliance

ATLAS/MUOS 5 ASCENT TIMELINE
T-0:00:02.7 Main Engine Start
 T+0:00:01.1 Liftoff
 T+0:00:49.3 Max Q
 T+0:01:48.7 Jettison 1-2 SRBs
 T+0:01:50.2 Jettison 3-4-5 SRBs
 T+0:03:27.8 Nose Cone Jettison
 T+0:03:32.8 Load Deck Jettison
 T+0:04:25.6 Main Engine Cutoff
 T+0:04:31.6 Stage Separation
 T+0:04:41.5 Centaur Ignition 1
 T+0:12:28.4 Centaur Cutoff 1
 T+0:20:27.6 Centaur Ignition 2
 T+0:26:14.5 Centaur Cutoff 2
 T+2:48:40.4 Centaur Ignition 3
 T+2:49:38.7 Centaur Cutoff 3
 T+2:53:17.7 Spacecraft Separation
The Launch Readiness Review is planned for Wednesday, followed by rollout of the rocket to the launch pad on Thursday morning. The countdown sequence Friday morning lasts seven hours to prep the the two-stage vehicle and fuel it with 66,000 gallons of cryogenics.
The MUOS No. 5 launch will be the 63rd Atlas 5 flight and the third of 10 planned this year.
For United Launch Alliance, it'll mark the 108th flight for the company in 9 years and the fifth of 2016.

[Salo]

ULA ‏@ulalaunch  4 ч.4 часа назад
The ULA Launch Readiness Review is complete! #AtlasV set to launch #MUOS-5 June 24. 44-min window opens @ 10:30amEDT http://bit.ly/muos5

[triage]

Atlas V MUOS-5 Mission Profile
 

обещают трасляцию на ютубе

http://www.navy.mil/submit/display.asp?story_id=95320
Counting Down to Launch: 5th MUOS Satellite Poised to Complete Constellation

Release Date: 6/22/2016

By Space and Naval Warfare Systems Command Public Affairs
CAPE CANAVERAL, Fla. (NNS) -- The Navy's fifth Mobile User Objective System (MUOS) satellite is awaiting countdown for launch June 24, during a window from 10:30-11:14 a.m. EDT.

Спойлер

A live launch broadcast will begin at 10:10 a.m. EDT and will be viewable as an online webcast at http://www.ulalaunch.com.

In partnership with the Air Force Space and Missile Systems Center and the 45th Space Wing, the Navy Communications Satellite Program Office (PMW 146) is prepared to launch the MUOS-5 satellite, an on-orbit spare that will complete the five-satellite constellation. MUOS provides improved secure satellite communications around the world via an Internet Protocol-based system, equipping tactical and mobile warfighters with cell phone-like capabilities such as crystal-clear voice quality, excellent call completion rates and the ability to use voice and data simultaneously.

"With this fifth satellite, MUOS completes the current constellation bringing additional UHF (ultra-high frequency) capacity, as well as providing the assurance of an on-orbit spare for the new Wideband Code Division Multiple Access capability," said Capt. Joe Kan, PMW 146 program manager.

MUOS is operational today, supporting unrestricted operations via the satellites' legacy payloads that provide ultra-high frequency satellite communications for the DoD and mitigate potential gaps in UHF communications capabilities. The system's wideband code division multiple access (WCDMA) capability has been demonstrated through exercises with warfighters on terminal platforms from the Army, Air Force, Coast Guard and Navy--to include troops on the move, C-17 aircraft in flight, Coast Guard vessels in the north and south polar regions and the Navy's OE-538 submarine antenna.

"As legacy communications systems continue to age, we recognize the imperative to continue maturing MUOS WCDMA and support terminal development, testing, certification and fielding efforts to deliver end-to-end MUOS WCDMA capability," said Jarratt Mowery, director of end-to-end system testing. "As we move forward with continued testing and training, our end-users will have opportunities to assess and provide recommendations for improving the system--helping us ultimately deliver MUOS WCDMA capabilities to the warfighters as quickly and effectively as possible."

MUOS provides satellite communications in the UHF narrowband spectrum, which represents more than 50 percent of all DoD satellite communication users. The system is designed to support users who require greater mobility, higher data rates, access to Defense Information Systems Network voice and data services and improved operational availability.

The first four MUOS satellites are in their operational slots and providing legacy communications capability from their geosynchronous orbits. The MUOS constellation and associated network will extend narrowband communications availability well past 2025.

The Navy's Program Executive Office for Space Systems, located at the Space and Naval Warfare Systems Command in San Diego, is responsible for the MUOS program. For more information, visit www.public.navy.mil/spawar/PEOSpaceSystems/

For more information, visit www.navy.mil, www.facebook.com/usnavy, or www.twitter.com/usnavy.

For more news from Space and Naval Warfare Systems Command, visit http://www.navy.mil/local/spawar/.

[свернуть]

 https://twitter.com/ulalaunch/status/746022754374266880
ULA ‏@ulalaunch
On the launch pad! Some pics from this morning. ULA's #AtlasV is set to launch the #MUOS-5 mission for @SPAWARHQ

[Liss]

Предупреждений-то понавыпускали...

A0828/16 - ATTENTION AIRLINE DISPATCHERS, SOME OPERATORS APPEAR TO BE USING THE NOTAM BEGINNING TIME TO START FILING ROUTES AROUND THE LAUNCH OPERATION. LAUNCH HAZARD AREA TIMES IN THE NOTAM ARE ALTITUDE SPECIFIC AND DO NOT AFFECT ALL OPERATIONS. PART 2 OF THIS NOTAM CONTAINS A BREAKDOWN OF THE TIMES FOR PRE-LAUNCH AND LAUNCH CLOSURES. THE FOLLOWING IN USE FOR A MISSILE LAUNCH/SPLASH DOWN. DURING THESE TIMES KZMA ARTCC/OAC, KZNY ARTCC/OAC AND TJZS ARTCC/OAC WILL NOT APPROVE IFR FLIGHT WITHIN 45NM OF THE AFFECTED OCEANIC STATIONARY RESERVATIONS WEST OF 6000W,50NM BETWEEN 6000W AND 5500W, AND 60NM EAST OF 5500W OR WITHIN AFFECTED WARNING AREA AIRSPACE.
 EFF: 1606241230 - 1606241559 W497A WEST OF 80 WEST, SFC-5000MSL
 EFF: 1606241230 - 1606241559 CAPE ATCAA, SFC-FL180
 EFF: 1606241400 - 1606241559 R2933, 5000MSL-UNL
 EFF: 1606241400 - 1606241559 R2934, SFC-UNL
 EFF: 1606241430 - 1606241559 LAUNCH HAZARD AREA A. FROM 2836N 8036W TO 2838N 8034W TO 2835N 8008W TO 2829N 7918W TO 2826N 7906W TO 2823N 7906W TO 2823N 7917W TO 2828N 8012W TO 2828N 8018W TO 2832N 8033W TO TO 2833N 8035W TO POINT OF ORIGIN, SURFACE-UNLIMITED. LAUNCH HAZARD AREA B. FROM 2820N 7817W TO 2816N 7745W TO 2813N 7745W TO 2817N 7817 TO POINT OF ORIGIN. SURFACE TO UNLIMITED. LAUNCH HAZARD AREA C. FROM 2702N 7000W TO 2650N 6839W TO 2641N 6839W TO 2656N 7000W TO POINT OF ORIGIN, SURFACE TO UNLIMITED. LAUNCH HAZARD AREA D. FROM 2150N 5011W TO 2107N 4807W TO 2059N 4807W TO 2145N 5015W TO POINT OF ORIGIN, SURFACER TO UNLIMITED.
 IN THE INTEREST OF SAFETY, ALL NONPARTICIPATING PILOTS ARE STRONGLY ADVISED TO AVOID THE ABOVE AREAS, EXCEPT AS NOTED BELOW FOR FLIGHT PLAN FILING PURPOSES. THE FOLLOWING RESTRICTIONS WILL BE IN EFFECT WITHIN KZMA KZJX KZNY TJZS FIRS. ALL TRAFFIC RALT MUST BE ESTIMATED TO CLEAR OCEANIC ALTRV(S) AT OR BEFORE 1606241425. KZNY REQUEST AIRCRAFT CERTIFIED FOR RNP 4/10 FILE ROUTES TO AVOID HAZARD AREAS C AND D ABOVE BY 25NM, AND NON CERTIFIED RNP 4/10 AIRCRAFT TO AVOID AREAS C AND D BY 45NM DURING THE HAZARD PERIOD 1606241430 TO 1606241559. ATC WILL ISSUE FLOW RESTRICTIONS FOR DOMESTIC REROUTES TO AVOID IN USE. THE FOLLOWING INTERNATIONAL ROUTES WILL BE IMPACTED: AR3, AR6, AR15, AR17, AR19, AR21, AR22, G446,L435, L453, L454, L455, L463, M331, M593(NON-RNP 4/10 ONLY), M595, Y585. HIBAC TRANS. FOR SHFTY STAR. FOR FLIGHTS FILED OVER OMN ON THE FOLLOWING STARS: FISEL, GISSH, FRWAY, TUXXI, CAYSL EXPECT OMN J79 TRV AND TRV TRANSITION. HIBAC TRANS. FOR SHFTY STAR CLOSED. REROUTES FOR "AR" ROUTES WILL BE CONTAINED IN FAA ATCSCC(ATC COMMAND CENTER) ADVISORY. FOR FLIGHTS THAT HAVE NOT FILED AROUND OCEANIC HAZARD AREAS TRANSITING FROM MIAMI/SAN JUAN FIR TO NEW YORK EXPECT THE FOLLOWING INTERNATIONALREROUTES: G446 OMALY CASPR G446 AND REVERSE L453 LNHOM L452 KASAR ALOBI L453 L454 LNHOM L452 KASAR GRAMN L454 L455 HANCY L456 MEGGG TASNI L455 L463 SOBND CASPR BAAGR L463 NOBND BAAGR CASPR AR3 M331 MILLE M330 DUNIG GECAL M331 M593 (NON-RNP CERTIFIED)MILLE M330 DUNIG AMENO M595 MLLER M594 KOZIK AYTTE Y585 CVIKK TRV J79 OMN AND REVERSE PART OF 6. SEE TEXT, 24 JUN 12:30 2016 UNTIL 24 JUN 15:59 2016. CREATED: 22 JUN 16:13 2016

A0823/16 - STATIONARY ALTITUDE RESERVATION CAPE ATCAA ACT FOR A ROCKET LAUNCH. MIAMI CENTER WILL NOT APPROVE IFR FLIGHTS AND VFR SHOULD EXERCISE EXTREME CAUTION WITHIN AN AREA DEFINED AS 2847N08050W TO 2847N08021W TO 2847N07950W TO 2825N07950W TO 2825N08030W TO 2825N08041W TO 2831N08044W TO 2838N08047W TO BEGINNING. THIS ALTRV ENCOMPASSES PORTIONS OF R2933, R2934, AND W497A. SFC - FL180), 24 JUN 12:30 2016 UNTIL 24 JUN 15:59 2016. CREATED: 22 JUN 14:58 2016

!ISP 06/113 ZNY AIRSPACE UNMANNED ROCKET WI AN AREA DEFINED AS 5NM RADIUS OF GEE117024.5 (7.2NM NW PEO) SFC-FL180 DLY 1300-2200 1606241300-1606262200

!SUAE 06/999 ZMA AIRSPACE R2934 ACT SFC-UNL 1606241400-1606241559

NAVAREA IV 489/16
 WESTERN NORTH ATLANTIC.
ROCKETS.
1. HAZARDOUS OPERATIONS 241430Z TO 241559Z JUN,
ALTERNATE 251426Z TO 251555Z JUN
IN AREAS BOUND BY:
 A. 28-36N 080-36W, 28-38N 080-34W,
 28-35N 080-08W, 28-29N 079-18W,
 28-26N 079-06W, 28-23N 079-06W,
 28-23N 079-17W, 28-28N 080-12W,
 28-28N 080-18W, 28-32N 080-33W,
 28-33N 080-35W.
 B. 28-20N 078-17W, 28-16N 077-45W,
 28-13N 077-45W, 28-17N 078-17W.
C. 27-02N 070-00W, 26-50N 068-39W,
26-41N 068-39W, 26-56N 070-00W.
 D. 21-50N 050-11W, 21-07N 048-07W,
 20-59N 048-07W, 21-45N 050-15W.
 2. CANCEL THIS MSG 251655Z JUN 16.//
 Authority: EASTERN RANGE OP A7085 141308Z JUN 16.
 Date: 200409Z JUN 16
 Cancel: 25165500 Jun

[Старый]

Ну и фаустпатрон...

[oby1]

не вижу наклейки Энергомаш

[Прол]

oby1 пишет:
не вижу наклейки Энергомаш

Так вроде и наклейки изготовителя спутника нет .

[che wi]

[Salo]

James Dean ‏@flatoday_jdean  46 мин.46 минут назад  
Countdown has resumed from planned hold at T-2 hours...on track for 10:30am ET launch of #MUOS-5 from LC41.
 
  James Dean ‏@flatoday_jdean  48 мин.48 минут назад  
ULA "go" for cryogenic fueling of Atlas V for 10:30am ET launch of #MUOS-5 from Cape Canaveral AFS.

[che wi]

началась трансляция
http://www.ulalaunch.com/webcast.aspx

[che wi]

Погода: 100% go.

[Salo]

http://spaceflightnow.com/2016/06/23/av063_journal/

1415 GMT (10:15 a.m. EDT)
 Here's a look at some stats about today's mission. This will be:

[/li]
• The 645th launch for Atlas program since 1957
• The 350th Atlas launch from Cape Canaveral
• The 234th mission of a Centaur upper stage
• The 211th use of Centaur by an Atlas rocket
• The 469th production RL10 engine to be launched
• The 12th RL10C-1 engine launched
• The 69th flight of the RD-180 main engine
• The 63rd launch of an Atlas 5 since 2002
• The 26th Air Force mission for an Atlas 5
• The 95th Evolved Expendable Launch Vehicle flight
• The 108th United Launch Alliance flight overall
• The 55th Atlas 5 under United Launch Alliance
• The 21st 500-series flight of the Atlas 5
• The 7th Atlas 5 to fly in the 551 configuration
• The 5th MUOS satellite to launch
• The 3rd Atlas 5 launch of 2016
  

1414 GMT (10:14 a.m. EDT)
 The vehicle's three cryogenic tanks are at flight level.
 
1412 GMT (10:12 a.m. EDT)
 The MUOS 5 satellite is switching to internal power for launch.
 
1411 GMT (10:11 a.m. EDT)
 T-minus 4 minutes and holding. The countdown has entered the planned 15-minute hold to give the launch team a chance to review all systems before pressing ahead with liftoff.
 
1410 GMT (10:10 a.m. EDT)
 T-minus 5 minutes. Standing by to go into the final built-in hold.
 
1401 GMT (10:01 a.m. EDT)
 Weather is observed GO for liftoff based on the current conditions and forecast to stay favorable for a 10:30 a.m. EDT (1430 GMT) launch today.
Skies are clear, radar is clear and winds are 4 knots.

1400 GMT (10:00 a.m. EDT)
 Just 30 minutes until liftoff time. Today's launch is the fifth for the Navy's new Mobile User Objective System satellite constellation to provide mobile communications to U.S. military forces.
In its launch configuration atop the Atlas rocket with the two power-generating solar arrays stowed on the sides and the umbrella reflectors folded up, MUOS stands 22 feet tall, 12 feet wide and 6 feet deep. The craft was built on Lockheed Martin's A2100 satellite design used by dozens of previous communications spacecraft.
Following separation from the launch vehicle nearly three hours after liftoff today, ground controllers will begin maneuvering MUOS 5 into geosynchronous orbit, deploying its power-generating solar arrays to span more than 90 feet, unfurling a pair of umbrella-like antenna reflectors on boom assemblies and fully checking out the onboard communications equipment.
Eight orbital raising burns are expected over the next 8-9 days, followed by the antenna reflector deploys, then a test program that Lockheed Martin will perform. The military will take control of the satellite in a few months to conduct its own acceptance evaluation before the craft enters UHF service.

1359 GMT (9:59 a.m. EDT)
 The fuel-fill sequence for the first stage main engine is starting.
 
1352 GMT (9:52 a.m. EDT)
 This is the fifth and final planned launch of a Mobile User Objective System spacecraft by the Navy.
MUOS No. 1 was launched Feb. 24, 2012 aboard an Atlas 5 and serves as the Pacific Ocean satellite.
MUOS No. 2 launched July 19, 2013 aboard another Atlas 5 and serves as the continental U.S. satellite.
MUOS No. 3 went up atop an Atlas 5 on Jan. 20, 2015 to cover the Atlantic Ocean region.
An Atlas 5 launched MUOS No. 4 on Sept. 2, 2015 to serve the Indian Ocean region.

1349 GMT (9:49 a.m. EDT)
 Weather odds have improved to 90 percent GO for launch today.
 
1345 GMT (9:45 a.m. EDT)
 Now 45 minutes from liftoff. Today marks the 63rd flight for Atlas 5, born of the Air Force's competition to develop next-generation Evolved Expendable Launch Vehicles. In its previous 62 missions since debuting in August 2002, the Atlas 5 has flown 24 flights dedicated to the Defense Department, 14 commercial missions, 12 for NASA and 12 with spy satellites for the National Reconnaissance Office.

[che wi]

[che wi]