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

Автор Salo, 10.03.2016 09:51:10

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Salo

#61
http://spaceflightnow.com/2016/07/08/navys-new-muos-5-communications-satellite-hits-snag-in-space/
ЦитироватьNavy's new MUOS 5 communications satellite experiences snag in space             
 July 8, 2016 Justin Ray
 
MUOS 5 in the factory. Credit: Lockheed Martin

CAPE CANAVERAL — Trouble has befallen the U.S. Navy's new communications satellite that was launched fr om Cape Canaveral two weeks ago, suspending orbit raising maneuvers and leaving the craft half-way between its rocket deployment orbit and a circular geosynchronous orbit.
The $340 million Mobile User Objective System satellite No. 5, the last in the planned spacecraft series and the in-orbit spare for Navy's constellation, was successfully lofted into space June 24 by the United Launch Alliance Atlas 5 rocket.
MUOS 5 is designed to provide Ultra High Frequency communications to the U.S. military for the next 15 years over an area that extends from Africa to the Middle East to Asia.
But a yet-undisclosed "anomaly" has halted orbit raising, the Navy's Program Executive Office for Space Systems, which runs MUOS and is located at the Space and Naval Warfare Systems Command in San Diego, told Spaceflight Now this morning.
The satellite is more than 12,000 miles away from a usable orbital perch.
The nature of the anomaly, options to overcome the problem and when orbit raising could resume are details the Navy declined to reveal today.
 
Launch of MUOS 5. Credit: Pat Corkery/Lockheed Martin

The most powerful version of the Atlas placed the 15,000-pound satellite into a customized high-perigee geosynchronous transfer orbit as planned, stretching from 2,379 by 22,219 miles at an inclination of 19.1 degrees.
From that highly elliptical preliminary orbit, the Lockheed Martin-built satellite would perform 7 firings of its Liquid Apogee Engine to raise the low point to circularize the orbit and reduce its orbital tilt closer to the equator.
But after an unspecified number of burns were completed, the trip to geosynchronous orbit was stopped, the Navy said in response to questions submitted by Spaceflight Now.
"The satellite experienced an anomaly that required the transfer maneuver to be temporarily halted," the Navy says.
"The Navy's Program Executive Office for Space Systems has reconfigured the satellite from orbital transfer into a stabilized, safe intermediate orbit to allow the MUOS team to evaluate the situation and determine options for proceeding."
MUOS 5 currently resides in an orbit of 9,471 by 22,185 miles at an inclination of 9.8 degrees, according to hobbyist observers tracking the satellite. It hasn't moved any higher in a week.
"To this point, MUOS 5 has completed 700 m/s out of the total approximately 1300 m/s velocity change required," said Ted Molczan, a respected satellite watcher.
The satellite is headed to a 5-degree inclined geosynchronous orbit wh ere it will match Earth's rotation and appear locked above one part of the world. That will be the Indian Ocean region for MUOS 5.
The pre-launch plan called for geosynchronous orbit to be reached and the satellite's solar arrays and two giant antenna reflectors be deployed within 9 days of launch, or by July 3.
"Nothing is more important to Lockheed Martin than mission success. We are working closely with our Navy customer to determine the cause of the anomaly," said Chip Eschenfelder, a Lockheed Martin spokesperson.
 
An illustration of the MUOS orbit raising plan. Credit: Lockheed Martin

MUOS spacecraft are equipped with a BT-4 main engine, made by IHI Aerospace of Tokyo, Japan. It is uses hydrazine fuel and nitrogen tetroxide to produce 100 pounds of thrust.
Previous satellites in the MUOS series performed 7 orbit raising burns ranging from 19 to 47 minutes in length to put the spacecraft into the proper geosynchronous orbit 22,300 miles up.
The MUOS 5 satellite also has 18 Aerojet Rocketdyne monopropellant hydrazine thrusters onboard for attitude control — a dozen 0.2-pound thrusters and six 5-pound thrusters.
After geosynchronous orbit is reached, Lockheed Martin initially positions the craft over the testing location in the mid-Pacific Ocean in view of a Hawaiian ground station. The company runs about three months of testing before the craft is relocated to its operational orbital slot and handed to the Navy for its months-long test program.
MUOS 5 is intended to operate over the Indian Ocean, alongside MUOS 4. The craft is scheduled to begin service by year's end to provide Ultra High Frequency communications services to the U.S. military. It also serves as an in-space spare satellite for the MUOS constellation's four primary craft providing mobile communications to a rugged smartphone network for forces on the move.
"MUOS 5 was launched as an on-orbit spare to provide immediate redundancy to the MUOS constellation, which is performing nominally," the Navy said today. "MUOS 5 is an on-orbit spare, and delay in reaching its test location will have no impact upon current legacy or Wideband Code Division Multiple Access satellite communications operations."
Coverage to legacy users will transmit through a 17.7-foot-diameter antenna on the satellite and the advanced, multi-beam features of MUOS to significantly increase the transmission capacity over the Navy's previous satellites will use a 46-foot antenna.
Still packaged in the launch configuration, MUOS 5's two power-generating solar arrays are folded up and the umbrella reflectors stowed. The silver and black craft is 22 feet tall.
All branches of the U.S. military 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 Navy built the $7.7 billion MUOS system — five satellites and four ground stations — to extend narrowband communications services for the military beyond 2025.
The first four MUOS satellites are in use today providing legacy communications services — MUOS 1 over the Pacific, MUOS 2 to the Americas, MUOS 3 above the Atlantic and MUOS 4 over the Indian Ocean. MUOS 5 was built to be the spare, yet launched so it could quickly replace one of its sister-satellites if called upon.
The last time a U.S. military communications satellite faced troubles during orbit raising was the first Advanced Extremely High Frequency spacecraft in 2010.
A manufacturing mishap, likely something left in the satellite that clogged a propellant line, prevented the main propulsion system from firing once the craft reached space, prompting ground controllers to devise emergency plans for rescuing the mission.
After 14 months and nearly 500 maneuvers using tiny electric thrusters on the satellite, the $1 billion AEHF 1 finally lifted itself to geosynchronous orbit without the use of its main engine. The spacecraft is in service today for ultra-secure communications between the president and military leaders.
"Были когда-то и мы рысаками!!!"

Apollo13

ЦитироватьMike Gruss ‏@Gruss_SN  48m48 minutes ago

Navy: MUOS-5 "experienced a failure of the orbit raising propulsion system." DoD is considering alternate orbit adjustment options.

Отказал апогейный двигатель?

azeast

https://russian.rt.com/article/315046-vms-ssha-ne-smogli-vyvesti-sputnik-svyazi

Военный спутник связи США MUOS-5, запущенный американским консорциумом United Launch Alliance (ULA) с помощью ракеты-носителя Atlas V, не смог выйти на расчётную орбиту.
«С момента поломки спутник находится на стабильной промежуточной орбите. Команда программы MUOS продолжает оценивать ситуацию, рассматривать альтернативные способы корректировки орбиты», — цитирует РИА Новости официальное заявление Командования боевых космических и морских систем ВМС США (SPAWAR).
Запуск был осуществлен 24 июня 2016 года с космодрома на мысе Канаверал. Предполагалось, что спутник, выведенный первоначально на низкую орбиту, должен будет с помощью встроенной двигательной установки переместиться на высоту около 35,4 тыс. километров, однако этого не произошло.

Salo

#64
http://spaceflightnow.com/2016/08/02/navy-looks-for-plan-b-to-salvage-its-newest-communications-satellite/
ЦитироватьNavy looks for Plan B to salvage its newest communications satellite             
 August 2, 2016 Justin Ray
 A rocketcam view of MUOS No. 5 separating from the Centaur upper stage. Credit: ULA

CAPE CANAVERAL — The U.S. Navy has declared the primary orbit-raising system aboard its new MUOS No. 5 communications satellite failed, leaving controllers scrambling to design a rescue plan.
The final Mobile User Objective System satellite was launched into a geosynchronous transfer orbit on June 24 by a United Launch Alliance Atlas 5 rocket from Cape Canaveral.
The Lockheed Martin-built spacecraft was supposed to perform 7 burns of its main engine to raise and circularize the orbit to geosynchronous altitude 22,300 miles over the equator in view of Hawaii.
After completing an unspecified number of maneuvers, an "anomaly" struck June 29 that has rendered the main propulsion system failed.
"Evaluation of the fifth Mobile User Objective System (MUOS) satellite determined that the satellite experienced a failure of the orbit-raising propulsion system during a transfer maneuver on June 29," the Navy announced today.
"The transfer maneuver was designed to take the satellite from its initial elliptical launch orbit to its final circular geosynchronous orbit. This anomaly resulted in the transfer maneuver being halted."
The satellite was launched into a customized high-perigee geosynchronous transfer orbit as planned, stretching from 2,379 by 22,219 miles at an inclination of 19.1 degrees.
With some maneuvering already accomplished, MUOS 5 lifted its perigee to around 9,471 miles and reduced inclination to 9.8 degrees, hobbyist observers tracking the satellite reported in early July. They were the first to notice and publicly reveal that the craft has suddenly stopped maneuvering.
"The satellite remains in a stable intermediate orbit since experiencing the anomaly. The MUOS team is continuing to evaluate the situation, considering alternate orbit adjustment options, calculating mission impact and investigating all options before proceeding," the Navy statement said today.
But it appears the satellite has performed some orbit-raising in recent days, albeit tiny compared to large-scale maneuvers. The Navy has not confirmed any movements, but hobbyists keeping tabs on the stricken satellite have seen the tell-tale signs.
"When Scott Tilley observed MUOS 5 on July 21 near 11:00 UTC, it was still in the orbit in which it had been stranded by the propulsion system failure on June 29. When he next observed it, on July 30 at 10:00 UTC, it was nearly 17 minutes late relative the orbit it had been in on July 21. That is an indication that it made one or more maneuvers in the interim. The orbit change probably was not large. A precise determination is pending further observations," said Ted Molczan, a respected satellite observer.
The satellite is in a 16-hour orbit, more than 12,000 miles away from a usable orbital perch.
With the 100-pound-thrust main engine now out of commission, ground controllers will look to the satellite's small thrusters for saving the mission.
The craft is equipped with 18 monopropellant hydrazine thrusters designed for attitude control — a dozen 0.2-pound thrusters and six 5-pound thrusters.
The BT-4 main engine, made by IHI Aerospace of Tokyo, Japan, uses hydrazine fuel and nitrogen tetroxide. Aerojet Rocketdyne made the thrusters for MUOS.
The Navy has not identified the culprit for the propulsion system woes. No specific component has been implicated.
The situation is reminiscent of the Air Force's first Advanced Extremely High Frequency satellite that experienced a main propulsion system failure after launch due to a clogged fuel line. It was able to achieve geosynchronous orbit using its xenon-fed electric thrusters with no reduction to mission life.
But the MUOS satellites do not have a xenon propulsion system, only hydrazine.
MUOS No. 5 was supposed to arrive in its geosynchronous orbit on July 3 for the start of checkout in view of the Hawaii ground station before drifting to its operational location over the Indian Ocean. Original plans called for service activation by Christmas.
The last-of-its-kind satellite planned to fulfill a dual-role in space — immediately providing ultra-high frequency communications to U.S. military forces while also serving as an in-orbit spare for the Navy's new "rugged smartphone" system. The four earlier MUOS satellites are in use today providing UHF communications.
"Были когда-то и мы рысаками!!!"

Salo

ЦитироватьApollo13 пишет:
Отказал апогейный двигатель?
Да. А СПД и ионников нет. Остались только микродвигатели ориентации.
"Были когда-то и мы рысаками!!!"

Apollo13

#66
А есть у кого-то нынешняя орбита MUOS-5? На zarya.info все орбиты запусков 2016 года пропали  :(  

http://www.zarya.info/Diaries/Launches/Launches.php?year=2016

После запуска было 35654х3903 км 18,97 градусов. Это 1407 м/с до ГСО.

Прол

#67
ЦитироватьApollo13 пишет:
А есть у кого-то нынешняя орбита MUOS-5? На zarya.info все орбиты запусков 2016 года пропали  :(  

 http://www.zarya.info/Diaries/Launches/Launches.php?year=2016

После запуска было 35654х3903 км 18,97 градусов. Это 1407 м/с до ГСО.

http://www.n2yo.com/satellite/?s=41622

Apollo13

ЦитироватьПрол пишет:
ЦитироватьApollo13 пишет:
А есть у кого-то нынешняя орбита MUOS-5? На zarya.info все орбиты запусков 2016 года пропали  :(  

 http://www.zarya.info/Diaries/Launches/Launches.php?year=2016

После запуска было 35654х3903 км 18,97 градусов. Это 1407 м/с до ГСО.

 http://www.n2yo.com/satellite/?s=41622
Спасибо. 35710 х 15249 х 9,8. Осталось 725 м/с до ГСО.

Seerndv

ЦитироватьSalo пишет:
ЦитироватьApollo13 пишет:
Отказал апогейный двигатель?
Да. А СПД и ионников нет. Остались только микродвигатели ориентации.
- а топливная система раздельная?
Свободу слова Старому !!!
Но намордник не снимать и поводок укоротить!
Все могло быть еще  хуже (С)

Salo

Если б была раздельная, то уже были бы похороны.
"Были когда-то и мы рысаками!!!"

Брабонт

Сабж поднимается мелкими шажками:

http://www.satobs.org/seesat/Aug-2016/0018.html 

MUOS 5 [41622, 16041A] is about 390 seconds late this night based on Mike's 16217 epoch elset. It appears to have maneuvered again perhaps indicating that the mission controllers have begun an effort to achieve geosync orbit with the on-board thrusters as the change is not great.
Пропитый день обмену и возврату не подлежит

ОАЯ

Для тех кто... подскажите: Если он доберется до рабочей точки на орбите и пройдет испытательный период - сколько он сможет работать по времени из-за неисправности?
Если мало нет ли возможности его дозаправить/отремонтировать?

Apollo13

ЦитироватьОАЯ пишет:
Для тех кто... подскажите: Если он доберется до рабочей точки на орбите и пройдет испытательный период - сколько он сможет работать по времени из-за неисправности?
Если мало нет ли возможности его дозаправить/отремонтировать?
Двигатели ориентации маломощные, поэтому из за гравипотерь на подъем орбиты может уйти гораздо больше топлива, чем предполагалось изначально.

Потенциальный клиент Орбитал АТК.

http://novosti-kosmonavtiki.ru/forum/messages/forum9/topic15286/message1481372/#message1481372


Salo

http://www.schriever.af.mil/News/Article-Display/Article/917972/neighborhood-watch-supports-navy-operations
Цитировать'Neighborhood Watch' supports Navy operations
 By Jennifer Thibault, 50th Space Wing Public Affairs / Published August 17, 2016

SCHRIEVER AIR FORCE BASE, Colo. --
Air Force Space Command's "Neighborhood Watch" Satellites, the Geosynchronous Space Situational Awareness Program, recently responded to the Navy's request for help with a satellite of its own.
The Joint Functional Component Command for Space officially tasked the 1st Space Operations Squadron to support Navy's ongoing Mobile User Objective System-5 anomaly effort after the satellite failed to reach its target geosynchronous orbit on July 3.
Anomaly resolution in space is challenging for many reasons, one being it's difficult to see what's going on with the satellite.  Traditionally, engineers, analysts and operators comb through telemetry to come up with possible reasons for the anomaly, however in cases like this GSSAP is able to provide Electro Optical Space Situational Awareness on the status of space objects to include location, orbit and size of the space object.
GSSAP crews conduct Rendezvous and Proximity Operations to get the best possible vantage point for collecting SSA data when requested.  In this case, the mission was to help rescue MUOS-5. 
Once tasked, 1 SOPS mission planning cell began the deliberate, customized mission planning to determine how to execute the operation and maximize the probability for success.  The satellites' differing orbits and the various forces at play, including astrodynamics, reminded crewmembers that success was not inevitable.
Capt. Barbara Dyer, 1 SOPS mission commander, led the crew that accomplished the command and control operations to collect MUOS-5 imagery on her 10th shift.
"Были когда-то и мы рысаками!!!"

Salo

Цитировать Spaceflight Now ‏@SpaceflightNow  15 мин.15 минут назад  
Navy announced its MUOS 5 satellite has reached usable orbit and deployed appendages, despite main engine failure
 
"Были когда-то и мы рысаками!!!"

Salo

"Были когда-то и мы рысаками!!!"

tnt22

http://news.lockheedmartin.com/2017-04-24-U-S-Navys-Fifth-Lockheed-Martin-Built-MUOS-Satellite-Now-Supporting-Troops-with-Ultra-High-Frequency-Communications
ЦитироватьU.S. Navy's Fifth Lockheed Martin-Built MUOS Satellite Now Supporting Troops with Ultra High Frequency Communications

MUOS-5 Completes Global Military Cellular Network As Spare For Next-Generation Capabilities
             

Lockheed Martin MUOS-5 satellite
SUNNYVALE, Calif., April 24, 2017 /PRNewswire/ -- The fifth Lockheed Martin (NYSE-LMT)-built Mobile User Objective System (MUOS-5) satellite is now delivering secure, beyond-line-of-sight communications to troops with legacy Ultra High Frequency (UHF) radios.
Спойлер
The U.S. Navy, working with Army Forces Strategic Command, configured one of MUOS-5's two communications payloads – its legacy UHF payload – to provide additional support for the Navy's legacy UHF satellite communications mission. Today, narrowband UHF communications is used by every Combatant Command in aircraft, ships, submarines, ground vehicles, as well as by troops in the field and special operations.

Eventually, legacy narrowband UHF communications will transition to next generation Wideband Code Division Multiple Access (WCDMA) capabilities provided by MUOS. To facilitate that transition, MUOS was intentionally designed with two communications payloads.

"Each MUOS satellite can simultaneously support both new WCDMA waveform capabilities and legacy UHF satellite communications," explained Mark Woempner, director of Narrowband Communications Systems at Lockheed Martin. "With MUOS 1-4 already on orbit providing near global WCDMA coverage, MUOS-5 will actively support legacy UHF communications and serve as an on-orbit WCDMA spare."

MUOS-5 is the latest edition to a network of orbiting satellites and relay ground stations that is revolutionizing communications for mobile forces. Users with new MUOS terminals will be able to seamlessly connect beyond line-of-sight around the world and into the Global Information Grid, as well as into the Defense Switched Network. MUOS' capabilities include simultaneous, crystal-clear voice, video and mission data over a secure high-speed Internet Protocol-based system.

More than 55,000 currently fielded radio terminals can be upgraded to be MUOS-compatible, with many of them requiring just a software upgrade.

Once fully operational, MUOS will provide users with more than 10 times the communications capacity of the legacy system it will replace. The network provides near-global coverage, including communications into polar regions. MUOS also has demonstrated successful communication of Integrated Broadcast Service (IBS) messages to in-flight test aircraft.

"The industry team for MUOS is an incredible partnership. Next for MUOS, we are laser-focused on bringing the complete system to full operational capability for the Navy," said Woempner. "Early combatant commander testing began in July 2016, and we have already received valuable user feedback and are working to rapidly incorporate their needs into the system."

MUOS-5 begins this transition after successful completing post-launch, on-orbit testing on January 19. The satellite completed orbit raising and successfully deployed its solar arrays and antennas for mission operations on Oct. 30, 2016.

Originally launched on June 24, 2016, MUOS-5 experienced an anomaly with its orbit raising propulsion system on its way to geosynchronous orbit. The Navy and Lockheed Martin engineering teams were able to isolate the issue and deliver MUOS to operational orbit using alternative propulsion.

The Navy's Program Executive Office for Space Systems and its Communications Satellite Program Office responsible for the MUOS program are based in San Diego, California. Lockheed Martin assembled and tested all five now-on-orbit MUOS satellites at its Sunnyvale, California, facility.

For additional MUOS information, photos and video visit: www.lockheedmartin.com/muos

About Lockheed Martin
 Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company that employs approximately 97,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services.
 
SOURCE Lockheed Martin
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tnt22

http://www.spaceflightinsider.com/missions/defense/muos-5-now-supporting-troops-uhf-communications/
ЦитироватьMUOS-5 Now Supporting Troops with UHF Communications

April 28th, 2017 | by Paul Knightly
Спойлер

An artist's rendering of a U.S. Navy Mobile User Objective System (MUOS) satellite in space. The MUOS-5 satellite is now providing secure UHF telecommunications to U.S. and allied mobile forces. Image Credit: Lockheed Martin
[свернуть]
The fifth Mobile User Objective System (MUOS-5) satellite is now delivering secure communications to troops using its Ultra High Frequency (UHF) telecommunications system. This comes as the U.S. Navy, partnered with the Army Forces Strategic Command, have worked to bring MUOS-5 into operation after it successfully completed on-orbit testing on January 19, 2017.
Спойлер


MUOS-5 at Lockheed Martin's Sunnyvale, California, satellite manufacturing facility prior to its rescheduled June 24, 2016, launch. (Click to enlarge) Photo Credit: Lockheed Martin
 
Narrowband UHF communications are utilized in a variety of military operations but will eventually transition to next generation Wideband Code Division Multiple Access (WCDMA) capabilities. To facilitate the transition to WCDMA, MUOS-5 was designed with two communications payloads to support both WCDMA and UHF.

"Each MUOS satellite can simultaneously support both new WCDMA waveform capabilities and legacy UHF satellite communications," explained Mark Woempner, director of Narrowband Communications Systems at Lockheed Martin. "With MUOS 1–4 already on orbit providing near global WCDMA coverage, MUOS-5 will actively support legacy UHF communications and serve as an on-orbit WCDMA spare."

In providing the next generation of communication capabilities to troops on the ground, MUOS-5 allows users to connect beyond line-of-sight around the world into the Global Information Grid and Defense Switched Network. They are also able to access crystal-clear voice, video, and data transmissions using a secure high-speed Internet connection.

As MUOS becomes fully operational, users will have access to more than 10 times the communications capacity of the legacy system it is replacing. In providing near-global coverage, including to polar regions, it has demonstrated the successful delivery of Integrated Broadcast Service (IBS) messages to in-flight aircraft.

"The industry team for MUOS is an incredible partnership. Next for MUOS, we are laser-focused on bringing the complete system to full operational capability for the Navy," said Woempner. "Early combatant commander testing began in July 2016, and we have already received valuable user feedback and are working to rapidly incorporate their needs into the system."

MUOS-5 has been transitioning to full operations after it successfully reached its intended orbit on October 30, 2016. This came after experiencing an anomaly with its orbit-raising propulsion system following its June 24, 2016, launch.
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