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(3 August 2020 – Spacecom) Spacecom, operator of the AMOS satellites fleet, and Gilat Telecom today announced that they have partnered to develop a faster, more reliable and more cost-effective satellite service for organisations of all sizes across Africa.

The service uses Spacecom’s AMOS-17 fully digital and advanced High Throughput Satellite (HTS), on both C and Ku band and Gilat Telecom’s unique SD-WAN MAX technology. It is available immediately and can be used for home and office connectivity including video conferences, e-health applications, e-learning, e-education, etc.

The biggest benefits from this cooperation for African MNOs and ISPs are:

  • CAPEX savings: Spacecom’s AMOS-17’s HTS fully digital payload enables Cross-Connection between all beam and all bands enabling the use of the existing equipment that can be also set-up remotely by the end customers (on existing or new terminals)
  • Higher throughput at reduced operational costs: using Gilat Telecom’s intelligent routing, capacity can be expanded by up to 20% (the equivalent of 6 Mbit/s can be achieved from a 5 Mbit/s downlink).
  • Smart traffic management: Gilat Telecom’s SD-WAN enables service providers and MNOs to centrally control the route that both satellite and fiber traffic takes to and from the customer. It enables different applications – voice, streaming, caching (Facebook, Netflix, Microsoft cloud services etc.) – to be identified with automatic prioritisation, according to the customer’s needs and demands.

Mr. Ofer Asif, SVP BizDev and Marketing at Spacecom said today, “This partnership enables us to boost the services offered to customers along with fast returns on investments to these growing markets. We are sure this fruitful cooperation will lead us to many great business opportunities in Africa, and invite all to gain great value from this unique collaboration and join us today!”

Mr. Amir Cohen, VP of Marketing and Business Development at Gilat Telecom also said, “We are an innovative company always focused on how we can improve the service we provide to our customers. Our partnership with Spacecom demonstrates how we work across the ecosystem to drive down costs and improve capacity”.

About Spacecom

Spacecom’s AMOS-17 fully digital HTS satellite supports a variety of broadcast, broadband and data services from its 17˚E orbital slot. The satellite provides high throughput (HTS) African coverage in C-band, global steerable coverage in Ka-band, and extensive Ku-band coverage over Africa. The satellite’s digital processing capabilities allow maximal service architecture flexibility, including full cross-beam and cross-band connectivity that maximize throughput and spectral efficiency.

Spacecom (Space-Communication Ltd.), operator of the AMOS-3 and AMOS-7 satellites co-located at 4°W, AMOS-17 located at 17°E and AMOS-4 at 65°E, provides high-quality broadcast and communication services to Europe, the Middle East, Africa, and Asia to direct-to-home (DTH) operators, internet service providers (ISPs), telecom operators and MNOs, network integrators and government agencies. AMOS-17 further expands Spacecom’s reach in Africa and Asia, reinforcing its position as a leading multi-regional satellite operator.

About Gilat Telecom

Gilat Telecom offers satellite and fiber-based connectivity solutions, delivering innovative broadband communication solutions to MNOs, telcos, ISPs, governments, enterprise customers, and organizations in Africa, Asia and South America.

As a technology-driven company, Gilat Telecom utilizes innovative technologies to provide its customers with the most cost-effective and advanced communication solutions.

Using its extensive knowledge and experience, Gilat Telecom has developed the SD-WAN MAX solution that uses AI, and machine-learning algorithms to provide maximum stability, data transformation, capacity, and smart steering to provide its customers with advanced connectivity solutions for more capacity and stability tailored to each specific customer.

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NRAO joins space mission to the far side of the Moon to explore the early universe

NRAO joins space mission to the far side of the

(22 September 2020 – NRAO) The National Radio Astronomy Observatory (NRAO) has joined a new NASA space mission to the far side of the Moon to investigate when the first stars began to form in the early universe.

Artist illustration of the Dark Ages Polarimetry Pathfinder (DAPPER), which will look for faint radio signals from the early universe while operating in a low lunar orbit. Its specialized radio receiver and high-frequency antenna are currently being developed by NRAO. (courtesy: NRAO/AUI/NSF, Sophia Dagnello)

The universe was dark and foggy during its “dark ages,” just 380 thousand years after the Big Bang. There were no light-producing structures yet like stars and galaxies, only large clouds of hydrogen gas. As the universe expanded and started to cool down, gravity drove the formation of the stars and black holes, which ended the dark ages and initiated the “cosmic dawn,” tens of millions of years later.

To learn more about that dark period of the cosmos and understand how and when the first stars began to form, astronomers are trying to catch energy produced by these hydrogen clouds in the form of radio waves, via the so-called 21-centimeter line.

But picking up signals from the early universe is extremely challenging. They are mostly blocked by the Earth’s atmosphere, or drowned out by human-generated radio transmissions. That’s why a team of scientists and engineers have decided to send a small spacecraft to lunar orbit and measure this signal while traversing the far side of the Moon, which is radio-quiet.

The spacecraft, called the Dark Ages Polarimetry Pathfinder (DAPPER), will be designed to look for faint radio signals from the early universe while operating in a low lunar orbit. Its specialized radio receiver and high-frequency antenna are currently being developed by a team at the NRAO’s Central Development Laboratory (CDL) in Charlottesville, Virginia, led by senior research engineer Richard Bradley.

“No radio telescope on Earth is currently able to definitively measure and confirm the very faint neutral hydrogen signal from the early universe, because there are so many other signals that are much brighter,” said Bradley. “At CDL we are developing specialized techniques that enhance the measurement process used by DAPPER to help us separate the faint signal from all the noise.” This project builds upon the work of Marian Pospieszalski who developed flight-ready low noise amplifiers at the CDL in the 1990s for the highly-successful Wilkinson Microwave Anisotropy Probe (WMAP), a spacecraft that gave the most precise figure yet for the age of the universe.

DAPPER will be part of the NASA Artemis program with the goal of landing “the first woman and the next man” on the Moon by 2024. It will likely be launched from the vicinity of the Lunar Gateway, the planned space station in lunar orbit intended to serve as a communication hub and science laboratory. Because it is able to piggy-back off of the surging interest in sending humans to lunar soil, DAPPER will be much cheaper to build and more compact than a full-scale NASA mission.

NRAO will spend the coming two years designing and developing a prototype for the DAPPER receiver, after which it will go to the Space Sciences Laboratory at UC Berkeley for space environmental testing.

“NRAO is very pleased to be working on this important initiative,” said Tony Beasley, director of the NRAO and Associated Universities Inc. vice president for Radio Astronomy Operations. “DAPPER’s contributions to the success of NASA’s ARTEMIS mission will build on the rapid growth of space-based radio astronomy research we’ve seen over the past decade. As the leading radio astronomy organization in the world, NRAO always looks for new horizons, and DAPPER is the start of an exciting field.”

DAPPER is a collaboration between the universities of Colorado-Boulder and California-Berkeley, the National Radio Astronomy Observatory, Bradford Space Inc., and the NASA Ames Research Center. Jack Burns of the University of Colorado Boulder is Principal Investigator and Science Team Chair. Project website for DAPPER.

The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.

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JPL meets unique challenge, delivers radar hardware for Jupiter mission

JPL meets unique challenge delivers radar hardware for Jupiter mission

(21 September 2020 – JPL) Engineers at NASA’s Jet Propulsion Laboratory met a significant milestone recently by delivering key elements of an ice-penetrating radar instrument for an ESA (European Space Agency) mission to explore Jupiter and its three large icy moons.

While following the laboratory’s stringent COVID-19 Safe-at-Work precautions, JPL teams managed to build and ship the receiver, transmitter, and electronics necessary to complete the radar instrument for the Jupiter Icy Moons Explorer (JUICE) mission.

NASA’s Jet Propulsion Laboratory built and shipped the receiver, transmitter, and electronics necessary to complete the radar instrument for JUICE, the ESA (European Space Agency) mission to explore Jupiter and its three large icy moons. Here the transmitter undergoes vibration testing at JPL. (courtesy: NASA/JPL-Caltech)

Set to launch in 2022, JUICE will orbit Jupiter for three years, perform multiple flybys of moons Callisto and Europa, then orbit Ganymede. The spacecraft will observe Jupiter’s atmosphere up close as well as analyze the surfaces and interiors of the three moons, which are believed to harbor liquid water under their icy crusts.

One of 10 instruments, the radar is key to exploring those moons. Called Radar for Icy Moon Exploration, or RIME, it sends out radio waves that can penetrate the surface up to 6 or 7 miles (10 kilometers) and collects data on how the waves bounce back. Some of the waves penetrate the crust and reflect off subsurface features – and the watery interiors – enabling scientists to “see” underneath.

In the case of Europa, which is believed to have a global ocean beneath its crust, the radar data will help gauge the thickness of the ice. NASA’s Europa Clipper mission, set to launch in the mid-2020s, will arrive around the same time as JUICE and collect complementary science as it performs multiple flybys of Europa.

Building RIME During a Pandemic

A collaboration between JPL in Southern California and the Italian Space Agency (ASI), JUICE’s RIME is led by Principal Investigator Lorenzo Bruzzone of the University of Trento in Italy. JPL’s responsibility was to make and deliver the transmitter and receiver – the pieces that send out and pull in radio signals – as well as the electronics that help those pieces communicate with RIME’s antenna. Now that the components have been delivered to ASI in Rome, the next steps are to test and integrate them before assembling the instrument.

“I’m really impressed that the engineers working on this project were able to pull this off,” said JPL’s Jeffrey Plaut, co-principal investigator of RIME. “We are so proud of them, because it was incredibly challenging. We had a commitment to our partners overseas, and we met that – which is very gratifying.”

In mid-March, engineers had just finished building the transmitter and its corresponding set of electronics. They were about to run an exhaustive regimen of tests to ensure the equipment would survive deep space – including vibration, shock, and thermal vacuum testing, which simulates the vacuum and extreme temperatures of space.

Then the coronavirus pandemic forced most JPL’s employees to work remotely. The tests would have to wait.

About a month later, RIME engineers and technicians came back on-site after JPL put in place its Safe-at-Work protocols, including – among other measures – social distancing, mask-wearing, and frequent hand-washing. Now the team had a schedule crunch, plus other new challenges. As one of the first teams to re-enter JPL (most employees continue to work remotely), they needed to figure out new ways to do things that used to be easy. Just finding screws and other fasteners, when the usual supply shop wasn’t open, became a puzzle to solve.

Project Manager Don Heyer had new human challenges as well.

“We needed to keep people not just safe – but comfortable being there,” Heyer said. “That was important, because otherwise they wouldn’t be able to do the job successfully.”

The key to moving forward was clearly defining next steps, he said. At the same time, they needed to make safety requirements thorough, but not too much of an additional burden for the staff. It was a learning experience, he said.

“But we got there pretty quickly.”

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SwRI instruments aboard Rosetta help detect unexpected ultraviolet aurora at a comet

SwRI instruments aboard Rosetta help detect unexpected ultraviolet aurora at

(21 September 2020 – SwRI) Data from Southwest Research Institute-led instruments aboard ESA’s Rosetta spacecraft have helped reveal auroral emissions in the far ultraviolet around a comet for the first time.

At Earth, auroras are formed when charged particles from the Sun follow our planet’s magnetic field lines to the north and south poles. There, solar particles strike atoms and molecules in Earth’s atmosphere, creating shimmering curtains of colorful light in high-latitude skies. Similar phenomena have been seen at various planets and moons in our solar system and even around a distant star. SwRI’s instruments, the Alice far-ultraviolet (FUV) spectrograph and the Ion and Electron Sensor (IES), aided in detecting these novel phenomena at comet 67P/Churyumov-Gerasimenko (67P/C-G).

Data from Southwest Research Institute-led instruments aboard ESA’s Rosetta spacecraft helped reveal unique ultraviolet auroral emissions around irregularly shaped Comet 67P. Although these auroras are outside the visible spectra, other auroras have been seen at various planets and moons in our solar system and even around a distant star. (courtesy: ESA/Rosetta/NAVCAM)

“Charged particles from the Sun streaming towards the comet in the solar wind interact with the gas surrounding the comet’s icy, dusty nucleus and create the auroras,” said SwRI Vice President Dr. Jim Burch who leads IES. “The IES instrument detected the electrons that caused the aurora.”

The envelope of gas around 67P/C-G, called the “coma,” becomes excited by the solar particles and glows in ultraviolet light, an interaction detected by the Alice FUV instrument.

“Initially, we thought the ultraviolet emissions at comet 67P were phenomena known as ‘dayglow,’ a process caused by solar photons interacting with cometary gas,” said SwRI’s Dr. Joel Parker who leads the Alice spectrograph. “We were amazed to discover that the UV emissions are aurora, driven not by photons, but by electrons in the solar wind that break apart water and other molecules in the coma and have been accelerated in the comet’s nearby environment. The resulting excited atoms make this distinctive light.”

Dr. Marina Galand of Imperial College London led a team that used a physics-based model to integrate measurements made by various instruments aboard Rosetta.

“By doing this, we didn’t have to rely upon just a single dataset from one instrument,” said Galand, who is the lead author of a Nature Astronomy paper outlining this discovery. “Instead, we could draw together a large, multi-instrument dataset to get a better picture of what was going on. This enabled us to unambiguously identify how 67P/C-G’s ultraviolet atomic emissions form, and to reveal their auroral nature.”

“I’ve been studying the Earth’s auroras for five decades,” Burch said. “Finding auroras around 67P, which lacks a magnetic field, is surprising and fascinating.”

Following its rendezvous with 67P/C-G in 2014 through 2016, Rosetta has provided a wealth of data revealing how the Sun and solar wind interact with comets. In addition to discovering these cometary auroras, the spacecraft was the first to orbit a comet’s nucleus, the first to fly alongside a comet as it travelled into the inner Solar System and the first to send a lander to a comet’s surface.

Additional instruments contributing to this research were Rosetta’s Langmuir Probe (LAP), the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA), the Microwave Instrument for the Rosetta Orbiter (MIRO) and the Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS).

Rosetta is an ESA mission with contributions from its member states and NASA. Rosetta’s Philae lander is provided by a consortium led by DLR, MPS, CNES and ASI. Airbus Defense and Space built the Rosetta spacecraft. NASA’s Jet Propulsion Laboratory (JPL) manages the U.S. contribution of the Rosetta mission for NASA’s Science Mission Directorate in Washington, under a contract with the California Institute of Technology (Caltech). JPL also built the Microwave Instrument for the Rosetta Orbiter and hosts its principal investigator, Dr. Mark Hofstadter. SwRI (San Antonio and Boulder, Colorado) developed the Rosetta orbiter’s Ion and Electron Sensor and Alice instrument and hosts their principal investigators.

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