Satellite Monitoring
Important satellite network services to be discussed at WRC 23
Several agenda items for WRC‑23 include fixed, mobile, broadcasting, and radio determination satellite services. Study Group 4 ITU–R is responsible for preparing these agenda items, aiming to ensure efficient use of the radio spectrum and satellite orbit systems and networks.
Non‑geostationary satellite orbit (non‑GSO) systems are one of the top priorities on the WRC‑23 agenda.
First, coexistence must be ensured between non‑GSO and geostationary satellite orbit (GSO) systems, with protection being ensured for both kinds of satellites. This requires accurate calculations of potential interference to and from non‑GSOs, allowing possible modifications to non‑GSO systems to be considered where needed.Improved rules for non‑GSOs should also cover those on orbital tolerances. These will be treated under the conference’s agenda items for satellite services (7A), milestone reporting (7B), and aggregate interference to GSOs (7J), along with a functional description for software tools to determine non‑GSO fixed-satellite service (FSS) system or network conformity (ITU–R Recommendation S.1503).
Satellite operators expect decisions at WRC‑23 to provide maximum flexibility in the use of spectrum allocations for certain purposes.
These include: earth stations in motion (ESIM) in the FSS, under agenda items 1.15 and 1.16; inter-satellite communications in the FSS, item 1.17; and FSS in the existing broadcasting-satellite service (BSS), item 1.19.
WRC‑23 discussions on these topics will aim to allow for more efficient spectrum use than is currently the case.
Amid rapid satellite development in recent years, non‑GSO systems have been deployed on a large scale. At the same time, new high-capacity satellites have gone into geostationary orbit.
On the regulatory side, the addition of a satellite component to the International Mobile Telecommunications (IMT‑2020) ecosystem has enabled satellite usage in cellular networks, along with new satellite services and other innovations.
Member States of the International Telecommunication Union (ITU) are increasingly raising the issue of sustainability, equitable access, and the rational use of GSO and non‑GSO spectrum resources. Resolution 219 of the ITU Plenipotentiary Conference (Bucharest, 2022) reflects these concerns.
WRC‑23 needs to continue giving high priority to establishing equitable access to satellite orbits. This means recognizing the special needs of developing countries, often including geographical challenges.
The development of innovative satellite technologies has now moved significantly ahead of regulations in the use of radio-frequency spectrum and satellite orbits. As this gap continues widening, ITU must find new approaches to keep international satellite regulation timely and relevant for the industry.
Technology is advancing so rapidly that some operators have begun to introduce new satellite technologies using GSO and non‑GSO satellites without waiting for conference decisions to regulate such use. Moreover, national administrations sometimes grant authorization for such uses in the absence of internationally agreed rules.
Concerns are growing about derogations from the ITU Radio Regulations, particularly under 4.4 of Article 4 — which allows national administrations to assign frequencies exceptionally, outside the Table of Frequency Allocations and other treaty requirements, as long as such assignments do not cause harmful interference to any existing radio services.
The conference will consider how to deal with the widespread use of 4.4, for non‑coordinated satellite networks. It should also clarify whether the derogation option under 4.4 should be available for all radio systems, or only non‑commercial systems.
Overall, WRC‑23 must clarify how administrations use the provision, when they have the right to invoke it, and which specific circumstances justify exceptional use of 4.4 on a temporary basis.
The Radio Regulations, containing the rules and regulations for the use of the radio-frequency spectrum and satellite orbits, are updated approximately every four years, in line with ITU’s associated conference cycle.
Perhaps the time has come to think about reducing the number of years between World Radiocommunication Conferences and simplifying the preparatory cycle and associated documentation. One way forward could be to reassess the current Conference Preparatory Meeting (CPM) format and to consider merging the two CPM sessions into one.
Given the rapid growth, transformation and innovation phase the satellite industry is now going through, WRC‑23 should instruct the ITU Radiocommunication Sector to conduct urgent studies on the potential for reusing frequency bands allocated to mobile services for non‑GSO satellite systems.
National administrations, as well as companies and organizations taking part as ITU Sector Members, need to jointly address these new issues, strengthen the ITU–R framework, and pursue global solutions for the benefit of all.
References:
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European Union plan for LEO satellite internet system
GSMA- ESA to collaborate on on new satellite and terrestrial network technologies
ABI Research and CCS Insight: Strong growth for satellite to mobile device connectivity (messaging and broadband internet access)
Telstra partners with Starlink for home phone service and LEO satellite broadband services
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Spark New Zealand partnering with Lynk Global to offer a satellite-to-mobile service
European Space Agency & UK Space Agency chose EnSilica to develop satellite communications chip for terminals
UK based EnSilica, a fabless ASIC and mixed signal chip maker, has announced a contract to develop a new chip to address the next generation of mass market satellite broadband user terminals.
The contract has been awarded through the European Space Agency’s (ESA) Advanced Research in Telecommunications Systems Core Competitiveness program (“ARTES CC”), through the support of the UK Space Agency.
The chip in development will enable a new generation of lower-cost, low-power satellite broadband user terminals, which track the relative movement of low-earth orbit satellites and allow users to access high bandwidth connectivity when out of reach of terrestrial networks.
Use cases include satellite communication-on-the-move (SOTM) for automotive, maritime, and aerospace connectivity as well as extending broadband access to users without internet access.
Dietmar Schmitt, Head of Technologies & Products Division at ESA, said “ESA is pleased to continue our collaboration with EnSilica through the ARTES Core Competitiveness programme and to support this important technology development, which will facilitate the provision of high capacity connectivity across a wide range of use cases.”
Henny Sands, Head of Telecoms at the UK Space Agency, described EnSilica’s satellite broadband user terminals chip as “a brilliant example of the diversity of expertise in the UK’s leading satellite communications sector.”
Henny added: “Through the ARTES CC programme the UK Space Agency aims to champion UK companies that have the right expertise and ambition to become global players in this market and lead on ground-breaking technologies that will enhance the wider UK space sector, create jobs and generate further investment. That’s why we recently announced £50 million of funding for ambitious and innovative projects that will supercharge the UK’s satellite communications industry.”
Paul Morris, VP RF and Communications BU, commented: “We are delighted to be continuing our successful partnerships with both UKSA and ESA to further develop innovative semiconductor solutions for the next generation of satellite broadband user terminals.”
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About EnSilica:
EnSilica is a leading fabless design house focused on custom ASIC design and supply for OEMs and system houses, as well as IC design services for companies with their own design teams. The company has world-class expertise in supplying custom RF, mmWave, mixed signal and digital ICs to its international customers in the automotive, industrial, healthcare and communications markets. The company also offers a broad portfolio of core IP covering cryptography, radar, and communications systems. EnSilica has a track record in delivering high quality solutions to demanding industry standards. The company is headquartered near Oxford, UK and has design centres across the UK and in India and Brazil.
Recent ASICs and Case Studies:
- 40nm Ka-band transceiver and beamformer for satellite terminals
- 180nm BCD H-bridge controller for automotive chassis control
- 55nm low-power mobile phone sensor interface
- 180nm BCD industrial MCU for safety critical applications
- 180nm BCD multi-channel 2GHz phase controller 600nm gyro sensor amplifier
- 28nm audio processor for smart microphone
- 28nm multi-standard GNSS receiver
- 40nm multi-standard analog and digital broadcast receiver
- 40nm 60GHz Radar sensor 65nm medical vital signs sensor with 2.4GHz radio
- 40nm NFC energy harvesting processor
About ESA’S ARTES Core Competitiveness Program:
ESA’s ARTES (Advanced Research in Telecommunications Systems)
program is unique in Europe and aims to support the competitiveness of European and Canadian industry on the world market. Core Competitiveness is dedicated to the development, qualification and demonstration of products (“Competitiveness and Growth”), or long-term technology development (“Advanced Technology”). Products in this context can be equipment for the platform or payload of a satellite, a user terminal, or a full telecom system integrating a network with its space segment.
China to build ground stations in Antartica to support ocean monitoring satellites
China, only the third country to put a man in space after the Soviet Union and United States, is to build ground stations on Antarctica to back its network of ocean monitoring satellites, state media said on Thursday.
Renders of the 43.95 million yuan ($6.52 million) project show four radome-covered antennas at China’s Zhongshan research base in East Antarctica. It is unknown if these are new and additional to antennas already established at the base.
The antennas will assist data acquisition from Chinese satellites that orbit in polar and near-polar orbits. Satellites in these orbits are visible near the poles multiple times a day, allowing more frequent opportunities for downlink than with stations at lower latitudes.
China has already launched eight Haiyang series ocean observation satellites into sun-synchronous orbits between 2002 and 2021, and plans more in the coming years. The first new-generation Haiyang-3 satellite is scheduled for launch this year, according the China’s main space contractor, CASC.
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China Satellites and Balloons used for Espionage?
China’s global network of ground stations to support a growing number of satellites and outer space ambitions has drawn concern from some nations that it could be used for espionage, a suggestion China rejects.
In 2020, Sweden’s state-owned space company, which had provided ground stations that helped fly Chinese spacecraft and transmit data, declined to renew contracts with China or accept new Chinese business due to “changes” in geopolitics.
The United States military shot down a Chinese spy balloon on Saturday that had spent the last week traversing the country. The balloon, which spent five days traveling in a diagonal southeast route from Idaho to the Carolinas, had moved off the coast by midday Saturday and was shot down within moments of its arrival over the Atlantic Ocean.
One of two F-22 fighter jets from Langley Air Force Base fired a Sidewinder air-to-air missile, downing the balloon, which was flying at an altitude of 60,000 to 65,000 feet. The F-22s were at 58,000 feet, with other American fighters in support.
In announcing the cancellation of his trip to China, U.S. Secretary of State, Antony J. Blinken said the entry of the spy balloon was a “clear violation of U.S. sovereignty and international law.”
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China Aerospace Science and Technology Group Co. is to build the stations at the Zhongshan research base, one of two permanent Chinese research stations on Antarctica, after winning the tender with its 43.95 million yuan ($6.53 million) bid, state-controlled China Space News reported.
Liftoff of a Long March 2C from Taiyuan carrying the Haiyang-1D ocean observation satellite on June 10, 2020. Image Credit: CASC
No technical details of the project were given in the report, though China Space News published two accompanying illustrations of an artist’s rendering that shows four ground stations at Zhongshan, located by Prydz Bay in East Antarctica, south of the Indian Ocean.
The project was part of broader initiatives aimed at building China’s marine economy and turning China into a marine power, according to China Space News.
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