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Northrop Grumman’s L-1011
Stargazer aircraft is on the runway at the Cape Canaveral Air Force Station
Skid Strip, FL on Nov. 2, 2018. The company’s air-launched Pegasus XL rocket, containing
NASA’s Ionospheric Connection Explorer, or ICON, satellite is attached to the belly beneath
the aircraft. Launch
NET Nov 7, 2018. Credit:
Ken Kremer/kenkremer.com/spaceupclose.com
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KENNEDY SPACE CENTER & CAPE CANAVERAL AIR FORCE STATION,
FL – NASA’s new science mission to study the Earth’s ionosphere – the tenuous upper
atmospheric layer at the ‘frontier of space’ forming the dynamic boundary where
Earth’s weather meets space weather – known as ICON, is tentatively slated to launch as early as this Wednesday, Nov. 7 from Florida - - amidst a
data review of the air launched Pegasus XL rocket systems to confirm whether it’s
really ready to carry it to orbit.
The Northrop Grumman Pegasus XL rocket has been afflicted with multiple anomalies forcing multiple launch delays over the past weeks and months – as well as a complete change in the launch site from Kwajalein Atoll in the Marshall Islands to the Florida Space Coast.
NASA and Northrop Grumman officials will hold a Launch Readiness Review (LRR) on Monday or Tuesday of this week to determine the Pegasus rockets fitness for flight and whether the launch will proceed as planned this week, officials told Space Up Close during a media tour of the rocket and L-1011 carrier aircraft at the Skid Strip launch site on Cape Canaveral Air Force Station, Friday, Nov. 2.
Enjoy our Space UpClose photo gallery of ICON, Pegasus XL rocket and L-1011 Stargazer, direct at the Skid Strip.
The Northrop Grumman Pegasus XL rocket has been afflicted with multiple anomalies forcing multiple launch delays over the past weeks and months – as well as a complete change in the launch site from Kwajalein Atoll in the Marshall Islands to the Florida Space Coast.
NASA and Northrop Grumman officials will hold a Launch Readiness Review (LRR) on Monday or Tuesday of this week to determine the Pegasus rockets fitness for flight and whether the launch will proceed as planned this week, officials told Space Up Close during a media tour of the rocket and L-1011 carrier aircraft at the Skid Strip launch site on Cape Canaveral Air Force Station, Friday, Nov. 2.
Enjoy our Space UpClose photo gallery of ICON, Pegasus XL rocket and L-1011 Stargazer, direct at the Skid Strip.
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Up Close view of Northrop
Grumman’s air-launched Pegasus XL rocket containing NASA’s Ionospheric
Connection Explorer, or ICON, satellite which is attached to the belly beneath the company’s
L-1011 Stargazer aircraft that will deploy the probe at 39,000 feet. It is on the runway at the Cape Canaveral Air
Force Station Skid Strip, FL, on Nov. 2, 2018. Launch
NET Nov 7, 2018. Credit: Ken
Kremer/kenkremer.com/spaceupclose.com
|
NASA’s $242 million Ionospheric Connection Explorer (ICON) research satellite mission is nestled
inside the nose cone of the Pegasus XL rocket that’s cradled at the belly of the
Northrop
Grumman L-1011 carrier jet named ‘Stargazer’
– the very last of its kind still flying in the world.
The ICON mission was originally planned to launch in 2017 but delayed due to mishandling of the rocket motors. Since than additional delays were caused by anomalous data signatures with the Pegasus rocket that were detected while the L-1011 was ferrying the probe in flight from Vandenberg Air Force Base, Ca.
“We’ve had some Pegasus issues and are still working on them,” Omar Baez, Sr. Launch Director, Launch Services Program, NASA Kennedy Space Center, told Space UpClose in an interview at the Skid Strip.
“When we brought the plane over from Vandenberg it was powered up and we saw some signatures on the Pegasus launch vehicle that did not make us happy. So we have taken the time to change out some components and try to exonerate the issues - and are doing some analysis.”
Originally the root cause was traced to a faulty sensor, which was replaced. But the off-nominal data reading recurred forcing further data reviews and launch postponements.
“We are still working on the exact root cause and trying to recreate the issues we saw in the operating environment at altitude,” Baez explained.
The flight and rocket teams decided to conduct another test flight of the combined L-1011/Pegasus XL/ICON last Sunday to collect and assess data readings during a 4-hour, 45-minute flight that tested the aircraft’s systems prior to launch.
“We did a test flight last Sunday We want to make sure it’s safe to fly. We didn’t see the problem again but we are still analyzing the data,” Baez elaborated.
“We did a lot of work and it passed the review. But there is still a lot more work to be done. It takes time to analyze the data and absord the whole picture and convince people its safe to fly.”
“The problem was with equipment in the control system - that was very similar to what we saw earlier. It’s taken more time than expected. So we are analyzing that.”
“We thought we had it licked but didn’t. So we are working the issue further to make sure it doesn’t have us licked.”
The ICON spacecraft itself has been healthy throughout.
The ICON mission was originally planned to launch in 2017 but delayed due to mishandling of the rocket motors. Since than additional delays were caused by anomalous data signatures with the Pegasus rocket that were detected while the L-1011 was ferrying the probe in flight from Vandenberg Air Force Base, Ca.
“We’ve had some Pegasus issues and are still working on them,” Omar Baez, Sr. Launch Director, Launch Services Program, NASA Kennedy Space Center, told Space UpClose in an interview at the Skid Strip.
“When we brought the plane over from Vandenberg it was powered up and we saw some signatures on the Pegasus launch vehicle that did not make us happy. So we have taken the time to change out some components and try to exonerate the issues - and are doing some analysis.”
Originally the root cause was traced to a faulty sensor, which was replaced. But the off-nominal data reading recurred forcing further data reviews and launch postponements.
“We are still working on the exact root cause and trying to recreate the issues we saw in the operating environment at altitude,” Baez explained.
The flight and rocket teams decided to conduct another test flight of the combined L-1011/Pegasus XL/ICON last Sunday to collect and assess data readings during a 4-hour, 45-minute flight that tested the aircraft’s systems prior to launch.
“We did a test flight last Sunday We want to make sure it’s safe to fly. We didn’t see the problem again but we are still analyzing the data,” Baez elaborated.
“We did a lot of work and it passed the review. But there is still a lot more work to be done. It takes time to analyze the data and absord the whole picture and convince people its safe to fly.”
“The problem was with equipment in the control system - that was very similar to what we saw earlier. It’s taken more time than expected. So we are analyzing that.”
“We thought we had it licked but didn’t. So we are working the issue further to make sure it doesn’t have us licked.”
The ICON spacecraft itself has been healthy throughout.
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Northrop Grumman’s L-1011
Stargazer aircraft is on the runway at the Cape Canaveral Air Force Station
Skid Strip, FL on Nov. 2, 2018. The company’s air-launched Pegasus XL rocket,
containing NASA’s Ionospheric Connection Explorer, or ICON, satellite is
attached to the belly beneath the aircraft as ground crews prepare for launch NET Nov. 7. Credit: Ken
Kremer/kenkremer.com/spaceupclose.com
|
As currently planned the ICON satellite
mission is expected to launch no earlier than Wednesday, Nov. 7 with a
90-minute launch window opening at 3 a.m. EST. Release from the Stargazer is
anticipated for 3:05 a.m. EST, said the team.
If the
LRR review goes well, the L-1011 Stargazer will fly to a target box about 200
miles off the east coast of Daytona Beach Nov. 7.
“We will fly the airplane in a race track pattern to the
drop point. That drop point is about 200 nautical miles east of Daytona,” said
Baez.
Stargazer soars aloft to drop deploy Pegasus
at an altitude of about 39,000 feet (12,000 meters) over the open Atlantic Ocean on an easterly heading of 105.0 degrees at 27 degree inclination to the equator.
The 3-stage
solid fueled propulsion Pegasus basically functions as a cruise missile for science
for deploying small, lightweight satellites to low Earth orbit (LEO) - in this instance for
NASA.
After dropping horizontally for a 5 second free-fall, the first stage of the Pegasus ignites. The ICON payload will separate and reach
orbit about 11 and a half minutes later at an altitude of 380 miles (575 kilometers).
ICON circles the Earth every 97 minutes.
What
is the flight profile?
“We fly to 39,000 feet. Drop Pegasus and arm the flight termination
system at 2.5 seconds,” Bryan Baldwin, Pegasus Program Manager, Northrup Grumman, told me
in a Skid Strip interview.
“First stage motor fires after about 5 seconds. It burns for about 88 seconds. Then separate 1st stage motor and ignite 2nd stage. It burns for about the same amount of time - then coasts to proper altitude for ignition of the 3rd stage motor and finalizing orbit. We separate the spacecraft at the designated time. The whole flight takes eleven minutes to spacecraft insertion.”
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This illustration
depicts NASA’s Ionosphere Connection Explorer (ICON) in space. ICON is
scheduled to launch no earlier than NET Nov. 7, 2018, on a mission to study the
dynamic zone high in the atmosphere where terrestrial weather from below meets
space weather above. Credits: NASA
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Despite
being launched at night, the Pegasus rocket flames will not be visible from the
East Coast, because its so far out and over the horizon.
“You probably can’t see anything from the shore. It’s just too far out. It’s over the horizon due to the curvature of the Earth,” noted Baez.
NASA TV will broadcast the launch live starting at about 2:45 a.m. EST.
Watch : https://www.nasa.gov/live
A back up launch opportunity exists on Nov 8 during the same 90-minute-long window. After that the Eastern Range is not available for roughly a week for regular maintenance work and the team will stand down.
“You probably can’t see anything from the shore. It’s just too far out. It’s over the horizon due to the curvature of the Earth,” noted Baez.
NASA TV will broadcast the launch live starting at about 2:45 a.m. EST.
Watch : https://www.nasa.gov/live
A back up launch opportunity exists on Nov 8 during the same 90-minute-long window. After that the Eastern Range is not available for roughly a week for regular maintenance work and the team will stand down.
 |
Up Close view of Northrop
Grumman’s air-launched Pegasus XL rocket containing NASA’s Ionospheric
Connection Explorer, or ICON, satellite which is attached to the belly beneath the company’s
L-1011 Stargazer aircraft that will deploy the probe at 39,000 feet. It is on the runway at the Cape Canaveral Air
Force Station Skid Strip, FL, on Nov. 2, 2018. Launch
NET Nov 7, 2018. Credit: Ken
Kremer/kenkremer.com/spaceupclose.com
|
The refrigerator-sized ICON weighs 634 pounds (288 kg) and
measures 76 inches long and 42 inches wide.
“ICON orbits at an operational altitude of 575 km - and the instruments are all looking down in a horizontal orientation all the time. Except the ion meter which makes measurements at the orbiting altitude,” said Robert Lockwood, Program Director, Science & Environmental Satellites, Northrop Grumman, in an interview with Space UpClose at the Skid Strip.
“There is no fuel onboard.”
“It uses regular reaction wheels for standard pointing at LEO.”
ICON is encapsulated inside the Pegasus nose cone. The rocket is 57 feet (17 meters) long, 4.2 meters wing diameter and weighs 52,920 pounds (24,000 kg).
ICON will study the ionosphere
– “the mixed layer of charged and neutral particles extending from about 50 to
360 miles above Earth’s surface, through which radio communications and GPS
signals travel, and the processes there that can distort or even disrupt these
signals. Knowledge gleaned from this mission will aid in mitigating its effects
on satellites and communications technology worldwide.”
During a baselined 2-year-long mission, ICON will explore the turbulent upper atmospheric ionosphere zone at the interface between the Earth’s terrestrial weather below and space weather above where giant winds whip up the particles – ionized by solar radiation.
The ionosphere is a “dynamic zone high in Earth’s atmosphere can be a source of great beauty such as the aurora, but can also be disruptive to radio communications and satellites and astronaut health. ICON will help determine the physical processes at play in this “frontier of space,” thus paving the way for mitigating their effects on our technology, communications systems and society.”
ICON was built by Northrop Grumman and is based on the LEOStar-2 bus.
The science operations team is led by the University of California, Berkeley. The probe is equipped with a suite four science instruments that will track changes physical and chemical properties of the neutral and charged atmospheric particles; MIGHTI, EUV, FUV and IVM.
“The ICON mission is looking at the interaction of the ionosphere and the charged layer of particles at the top of the atmosphere with space weather," Lockwood explained.
“It has 4 instruments altogether including two UV instruments [EUV & FUV], an in situ ion velocity meter [IVM] to measure the speed of charged particles, and MIGHTI to measure the speed and temperature of particles in the neutral atmosphere.”
“We know there are effects and correlation with whats happening in the atmosphere and weather. But we don’t really know why.”
“So the science we are doing with ICON is are making measurements to understand how the weather systems effect the profile in the ionosphere.”
Overall this mission marks the 44th launch of Pegasus XL since the maiden flight in 1990.
The last Pegasus launch took place in December for the launch of NASA’s $157 million hurricane forecasting mission. Space UpClose was on hand – my photos below.
“ICON orbits at an operational altitude of 575 km - and the instruments are all looking down in a horizontal orientation all the time. Except the ion meter which makes measurements at the orbiting altitude,” said Robert Lockwood, Program Director, Science & Environmental Satellites, Northrop Grumman, in an interview with Space UpClose at the Skid Strip.
“There is no fuel onboard.”
“It uses regular reaction wheels for standard pointing at LEO.”
ICON is encapsulated inside the Pegasus nose cone. The rocket is 57 feet (17 meters) long, 4.2 meters wing diameter and weighs 52,920 pounds (24,000 kg).
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A technician uses an ultraviolet
light to inspect the Northrop Grumman Pegasus XL payload fairing on May 22,
2018. The examination is taking place after mating NASA’s Ionospheric
Connection Explorer, or ICON, satellite to the Pegasus XL rocket inside
Building 1555 at Vandenberg Air Force Base in California. Credit: NASA/Randy Beaudoin
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During a baselined 2-year-long mission, ICON will explore the turbulent upper atmospheric ionosphere zone at the interface between the Earth’s terrestrial weather below and space weather above where giant winds whip up the particles – ionized by solar radiation.
The ionosphere is a “dynamic zone high in Earth’s atmosphere can be a source of great beauty such as the aurora, but can also be disruptive to radio communications and satellites and astronaut health. ICON will help determine the physical processes at play in this “frontier of space,” thus paving the way for mitigating their effects on our technology, communications systems and society.”
ICON was built by Northrop Grumman and is based on the LEOStar-2 bus.
The science operations team is led by the University of California, Berkeley. The probe is equipped with a suite four science instruments that will track changes physical and chemical properties of the neutral and charged atmospheric particles; MIGHTI, EUV, FUV and IVM.
“The ICON mission is looking at the interaction of the ionosphere and the charged layer of particles at the top of the atmosphere with space weather," Lockwood explained.
“It has 4 instruments altogether including two UV instruments [EUV & FUV], an in situ ion velocity meter [IVM] to measure the speed of charged particles, and MIGHTI to measure the speed and temperature of particles in the neutral atmosphere.”
“We know there are effects and correlation with whats happening in the atmosphere and weather. But we don’t really know why.”
“So the science we are doing with ICON is are making measurements to understand how the weather systems effect the profile in the ionosphere.”
Overall this mission marks the 44th launch of Pegasus XL since the maiden flight in 1990.
The last Pegasus launch took place in December for the launch of NASA’s $157 million hurricane forecasting mission. Space UpClose was on hand – my photos below.
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An Orbital ATK L-1011
“Stargazer” aircraft carrying a Pegasus XL rocket with NASA’s CYGNSS spacecraft
takes off from the Skid Strip at Cape Canaveral Air Force Station, Florida on
Dec. 15, 2016 and successfully launches the spacecraft. Credit: Ken
Kremer/kenkremer.com/spaceupclose.com
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ICON is a NASA Explorer class mission managed by NASA’s Goddard Space Flight Center, Greenbelt, MD.
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NASA ICON team
pose for group shot with ICON ionospheric exploration probe encapsulated inside Northrop
Grumman Pegasus XL rocket
nestled beneath last flying L-1011 at Cape Canaveral Air Force Station Skid Strip, FL, on Nov. 2, 2018. Team: NASA, Northrop Grumman, UC
Berkeley. Launch
NET Nov 7, 2018. Credit: Ken
Kremer/kenkremer.com/spaceupclose.com
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Stay tuned here for Ken's continuing Earth and Planetary science and human spaceflight news: www.kenkremer.com –www.spaceupclose.com – twitter @ken_kremer – email: ken at kenkremer.com
Dr. Kremer is a research scientist and journalist based in the KSC area.
………….
Ken’s photos are for sale and he is available for lectures and outreach events
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Robert Lockwood, Northrop
Grumman Science Satellite Program Director (l), and Ken Kremer, Space
UpClose pose with NASA ICON logo in front of Pegasus XL rocket attached to
belly of L-1011 carrier aircraft at
the Cape Canaveral Air Force Station Skid Strip, FL, on Nov. 2, 2018. Launch NET Nov 7, 2018. Credit:
Ken Kremer/kenkremer.com/spaceupclose.com
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