Satellite Internet Constellation: How It Works and Its Impact

Satellite internet constellations are a network of small satellites orbiting the Earth, providing internet connectivity to remote and underserved areas.

These satellites are equipped with advanced communication technology, allowing them to transmit data at speeds of up to 1 Gbps.

The first satellite in a constellation is typically launched into orbit, followed by additional satellites that are deployed over time to create a full network.

Each satellite in the constellation has a unique role, such as providing coverage to a specific region or serving as a gateway to the internet.

Related reading: Starlink Satellites Launch Today

In the 1990s, several LEO satellite internet constellations were proposed and developed, including Celestri (63 satellites) and Teledesic (initially 840, later 288 satellites). These projects were abandoned after the bankruptcy of the Iridium and Globalstar satellite phone constellations in the early 2000s.

Interest in satellite internet constellations reemerged in the 2010s due to the dropping cost of launching to space and increased demand for broadband internet access. By late 2018, more than 18,000 new satellites had been proposed to be launched and placed in LEO orbits between 2019 and 2025.

Explore further: Why Satellites Are Important

The first satellite internet constellation to be fielded was Starlink, which began launching in late 2019 and started beta testing the network in late 2020. The competitive disruption to established satellite company business models began to be better understood a year after Starlink's launch.

OneWeb began satellite deployment in 1H2020, and by early 2021, the three largest European satellite operators SES, Eutelsat, and Hispasat were willing to invest in developing a broadband satellite internet constellation with private funds if the European Union invested government funds as well.

Related reading: What Is Starlink Satellites

Satellite internet constellations are being designed with varying numbers of satellites, orbit types, and telecommunication architectures. The dynamic nature of these networks is particularly challenging due to the rapid passage of LEO satellites over a given location.

Some proposed systems have been analyzed using statistical methods and simulations to estimate total throughput. The results suggest that these systems can provide significant benefits, but also pose complex technical challenges.

The Chinese megaconstellation project, G60/Qianfan, plans to deploy 14,000 satellites by 2030. This ambitious project will provide global coverage, with the first 648 satellites launched by the end of 2025 to offer regional network coverage.

SpaceX's Starlink network is another notable example. It was initially designed to comprise 4,425 satellites, but the company has since withdrawn plans to field the 7,518-satellite V-band system. Instead, they're moving forward with a more comprehensive design for a second-generation (Gen2) Starlink network.

Here's a brief overview of the planned satellite constellations:

These satellite constellations have the potential to revolutionize global communication, but their deployment and operation will require careful planning and coordination.

There are several operational and planned satellite internet constellations. For example, SpaceX's Starlink constellation has already launched over 60 operational satellites and aims to deploy a total of 2,200 satellites to support their FCC spectrum allocation license assignment.

The European Union's IRIS² project plans to deploy a multi-orbit satellite internet constellation by 2027, while Telesat's Lightspeed constellation is set to be deployed starting in 2026.

Here are some key details about these constellations:

The Russian Federation's Sfera project plans to launch up to 640 satellites, with a test launch on October 23, 2022.

In November 2016, SpaceX applied to the FCC for a license to operate a non-geostationary orbit (NGSO) satellite system.

The FCC granted a license in September 2017, requiring half of the constellation to be in orbit within six years and the full system to be operating within nine years from the date of the license.

SpaceX filed documents in late 2017 to clarify their space debris mitigation plan, which included implementing an operations plan for the orderly de-orbit of satellites nearing the end of their useful lives.

Satellites would de-orbit by propulsively moving to a disposal orbit from which they would re-enter the Earth's atmosphere within approximately one year after completion of their mission.

In March 2018, the FCC granted approval for the initial 4,425 satellites, with some conditions, including obtaining a separate approval from the ITU.

The FCC supported a NASA request to ask SpaceX to achieve an even higher level of de-orbiting reliability than the standard that NASA had previously used for itself: reliably de-orbiting 90% of the satellites after their missions are complete.

SpaceX expected the total cost of development and buildout of the constellation to approach $10 billion in May 2018, equivalent to $11,950,000,000 in 2023.

In mid-2018, SpaceX reorganized the satellite development division in Redmond and terminated several members of senior management.

In May 2019, SpaceX launched the first batch of 60 operational Starlink satellites. This marked a significant milestone for the project, which aimed to deploy a constellation of satellites to provide global internet coverage.

The launch was part of a larger effort to deploy 2,200 satellites to support SpaceX's FCC spectrum allocation license assignment. To achieve this goal, the company planned to launch an average of 44 satellites per month for 60 months.

By July 2020, Starlink's limited beta internet service was opened to invitees from the public, who were charged just $2 per month to test out billing services.

The operational satellite constellations are a crucial part of the space industry, and one of the most notable is Starlink. This constellation has been operational since 2020, with the first batch of 60 operational satellites launched in May 2019.

Starlink's limited beta internet service was opened to invitees from the public in July 2020, with speeds over 150 Mbit/s reported by beta testers. The constellation has since expanded to include over 1,000 satellites in orbit, with plans to launch many more.

The operational satellites are divided into several groups, with each group having a specific orbital shell, plane, and inclination. For example, Group 1 has 72 satellites in the first shell, orbiting at 550 km (340 mi) in planes inclined 53.05°.

Here's a breakdown of the operational satellites by group:

These groups are constantly being updated as new satellites are launched and old ones are decommissioned. The operational satellites are a crucial part of the space industry, providing essential services like internet connectivity and navigation.

Starlink's fixed service users can expect latency from 20 to 40 ms, making it a significant improvement over traditional satellite internet.

This is a notable advantage for applications that require real-time communication, such as online gaming or video conferencing.

A study found that Starlink users averaged download speeds of 90.55 Mbit/s in the first quarter of 2022, but dropped to 62.5 Mbit/s in the second quarter, which is still relatively fast compared to traditional satellite internet.

The Telesat Lightspeed Network, on the other hand, is about 20-times more responsive than today's geosynchronous satellites and on par with fibre networks, making it a game-changer for applications that require low latency.

This level of responsiveness is comparable to what you'd experience with a fibre network, which is a significant improvement over traditional satellite internet.

Take a look at this: Broadband Global Area Network

Military communications play a vital role in operational and planned activities. Secure communication protocols are essential to prevent interception by enemy forces.

Satellite communication systems are used in military operations to provide global coverage and high-speed data transfer. These systems are particularly useful in remote or hard-to-reach areas.

Radio frequency (RF) signals are used for tactical communications, offering real-time voice and data transmission. RF signals are often used in conjunction with satellite systems for enhanced communication capabilities.

The use of encryption and decryption techniques ensures that sensitive information remains secure during transmission. This is crucial for maintaining operational security and preventing unauthorized access.

A fresh viewpoint: Indian Data Relay Satellite System

Communication networks are designed to be highly reliable and fault-tolerant, with redundancy built in to minimize downtime and ensure continuous operation. This is particularly important in high-stress environments where communication failures can have serious consequences.

The integration of various communication systems, including satellite, RF, and wireline, provides a robust and flexible communication infrastructure.

Teledesic was a former venture from the 1990s that aimed to provide broadband satellite internet services. It's a reminder that even promising ideas can fall through.

Communications satellite constellations have been around for a while, but some projects have been discontinued. Satellite Internet access has become more widespread, but it's not without its challenges.

Here's a brief look at some defunct projects in the satellite internet space:

Teledesic was a venture from the 1990s that aimed to provide broadband satellite internet services, but it's no longer active.

This defunct project was one of several attempts to bring satellite internet access to the masses.

Starshield was announced in December 2022 as a separate Starlink service for government entities and military agencies.

It enables the U.S. Department of Defense to own or lease Starshield satellites for partners and allies, showcasing the importance of Starlink in modern warfare.

Starshield satellites are designed with encryption and anti-jam capabilities, typical requirements for mobile military systems.

Elon Musk stated that Starshield will be owned by the US government and controlled by DoD Space Force, emphasizing the need for a civilian network and military separation.

In January 2022, SpaceX deployed four national security satellites for the U.S. government on their Transporter-3 rideshare mission, marking a significant step in their collaboration with the government.

The Starshield program received its first contract from the U.S. Space Force in September 2023, worth a total of $900 million over 10 years.

This contract is part of the Space Force's "Proliferated Low Earth Orbit" program, which aims to allocate contracts for LEO satellites, with SpaceX being the only vendor to have received an award to date.

The one-year Starshield contract is expected to support 54 mission partners across the Army, Navy, Air Force, and Coast Guard.

Demisability is a concept that's often misunderstood, but in the context of satellite technology, it refers to the ability to safely de-orbit a satellite at the end of its life. Starlink operates the world's largest satellite constellation, with over 6,750 satellites currently in orbit.

Starlink has taken a proactive approach to demisability, introducing a space safety service to ease coordination with other satellite operators and launch service providers. This service shows the company's commitment to responsible space practices.

Starlink operates with the most conservative maneuver thresholds in the industry, ensuring that its satellites can be safely de-orbited when they reach the end of their lifespan. This is a crucial aspect of demisability.

Starlink satellites orbit the planet at about 550km, significantly closer to Earth than traditional geostationary satellites. This close proximity enables lower latency.

The round trip data time between a user and the Starlink satellite is around 25 ms, a marked improvement over the 600+ ms of traditional satellite internet services. This reduction in latency makes it possible to support high data rate activities.

The Starlink constellation covers the entire globe, ensuring that users have access to reliable and fast internet no matter where they are located.

Consider reading: European Data Relay System

Starlink is a game-changer in the world of satellite internet. Most traditional satellite services rely on a single geostationary satellite orbiting the planet at 35,786 km.

This high altitude results in extremely high latency, making it nearly impossible to support activities like streaming or online gaming. The round trip data time between the user and satellite can be as high as 600+ ms.

Starlink, on the other hand, uses a constellation of thousands of satellites that orbit the planet much closer to Earth, at about 550km. This lower orbit significantly reduces latency to around 25 ms.

The entire globe is covered by these satellites, making Starlink a reliable option for people in remote areas.

SpaceX has made applications to the FCC for at least 32 ground stations in the United States.

A typical ground station has nine 2.86 metres (9.4 feet) antennas in a fenced in area.

These ground stations are used to connect with Starlink satellites, and until February 2023, they used the Ka-band to do so.

As of July 2020, SpaceX has approvals for five of these ground stations, located in five states.

SpaceX's ground stations would also be installed on-site at Google data-centers worldwide, according to their filing.

The v2 Mini launch added frequencies in the 71–86 GHz W band (or E band waveguide) range, expanding the capabilities of these ground stations.

Discover more: Spacex Internet Satellites

The hardware that makes up our technology infrastructure is a crucial part of its overall performance. It's the physical components that enable us to access and utilize digital information.

Servers are the backbone of the internet, storing and managing vast amounts of data. They're essentially giant computers that provide services to users.

Data centers are specialized facilities that house these servers, providing a controlled environment for optimal performance. They're often located in areas with low temperatures to keep the equipment cool.

Network cables and routers are the physical connections that allow devices to communicate with each other. They're the highways of the digital world, enabling data to travel quickly and efficiently.

Fiber-optic cables are a type of network cable that uses light to transmit data. They're incredibly fast and reliable, making them a popular choice for high-speed internet connections.

High Throughput is a game-changer for businesses and individuals alike. Gigabits per second speeds to a remote location ensure seamless connectivity anywhere in the world.

This level of speed is particularly useful for large files and data transfers. With multiple Tbps of capacity in the network, you can enjoy enterprise-grade connectivity without any interruptions.

The astronomical community is sounding the alarm about the impact of satellite internet constellations on scientific observations. Astronomers claim that the brightness of these satellites will severely impact scientific observations, making it difficult to schedule observations to avoid pointing where satellites currently orbit.

The International Astronomical Union, National Radio Astronomy Observatory, and Square Kilometre Array Organization have all released statements expressing concern about the issue. Recent studies have shown that the "unintended electromagnetic radiation" from these satellites affects radio telescopes, creating distortions and excessive noise.

Light pollution is a growing concern, and it's not just a problem for astronomers. The IAU Centre for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference was created to manage these new obstacles to space exploration.

The rapid growth of satellite constellations is having a significant impact on astronomy. Astronomers are concerned about the effects of light pollution from these satellites, which will make it harder to conduct scientific observations.

The International Astronomical Union, National Radio Astronomy Observatory, and Square Kilometre Array Organization have all released statements expressing their concerns about the issue. The increasing number of satellites is making it more difficult for astronomers to schedule observations around their orbits.

Recent studies have shown that the electromagnetic radiation from these satellites is causing distortions and excessive noise in radio telescopes. This is a major problem for astronomers, as it can affect their ability to collect accurate data.

The International Astronomical Union has even created a special centre to manage the impact of satellite constellations on the dark and quiet sky. This centre is working to mitigate the effects of these new obstacles to space exploration.

The increased risk of collision is a pressing concern with the Starlink constellation.

SpaceX has performed approximately 50,000 collision-avoidance maneuvers between December 1, 2023, and May 31, 2024, about double the number from the previous six-month period.

A near-miss occurred early in the program when a satellite had a 1 in 1,000 chance of colliding with a European one, ten times higher than the ESA's threshold for avoidance maneuvers.

In 2021, Chinese authorities lodged a complaint with the United Nations, saying their space station had performed evasive maneuvers to avoid Starlink satellites.

Over 1,700 out of 6,873 collision avoidance maneuvers performed by Starlink satellites between December 1, 2021, and May 31, 2022, were to avoid Kosmos 1408 debris.

SpaceX satellites will maneuver if the probability of collision is greater than 10 (1 in 1,000,000 chance of collision), compared to the industry standard of 10 (1 in 10,000 chance of collision).

The average Starlink satellite had conducted fewer than three collision-avoidance maneuvers over the 6 preceding months, but the frequency has increased substantially.

The market effects of these satellite constellations are already being felt. In 2015, financial analysts questioned established geosynchronous orbit communications satellite fleet operators about how they would respond to the competitive threat of SpaceX and OneWeb LEO communication satellites.

Market players have been canceling planned investments in new geosynchronous orbit broadband communications satellites due to the expectation of large increases in satellite network capacity from emerging lower-altitude broadband constellations. This shift is causing a significant change in the market.

SpaceX, in particular, has been challenged regarding its Starlink project. The National Rural Electric Cooperative Association (NRECA) has urged the U.S. Federal Communications Commission (FCC) to "actively, and aggressively, and thoughtfully vet" the subsidy applications of SpaceX and other broadband providers.

The NRECA has raised concerns about the funding allocation to Starlink, which would include service to non-rural locations. This has sparked debate about the effectiveness of the Rural Digital Opportunity Fund (RDOF) in addressing rural internet access.

Starlink has also encountered trademark conflicts in some countries, such as Mexico and Ukraine. Despite these challenges, Starlink is deployed worldwide and continues to expand its reach.

Expand your knowledge: SkyWave Mobile Communications

Satellite internet constellations offer numerous benefits, making them an attractive option for various industries. Aeronautical, Maritime, Enterprise, Telecom, and Government networks can rely on these unique benefits.

With Telesat Lightspeed technology, you can enjoy flexible and focused internet connectivity. Our intelligent network can dynamically allocate bandwidth to areas with high traffic demand.

Telesat Lightspeed is also an affordable solution for ubiquitous reach. It's more cost-effective than fibre and microwave alternatives, with disruptive pricing that empowers customers to expand their coverage and propel their growth.

Satellite internet constellations are being tested in extreme environments like Antarctica, where trials began at McMurdo Station in September 2022.

These trials utilize polar-orbiting satellites with optical interlinks to connect to ground stations in South America, New Zealand, and Australia, since Antarctica has no ground stations.

The satellite internet constellation offers a range of services, including internet backhaul, wireless backhaul, and corporate networks, which cater to various industries and applications.

User terminals are a crucial part of satellite internet systems, and both Starlink and Telesat Lightspeed have their own versions.

Starlink's user terminals are the size of a pizza box and have phased array antennas that track the satellites. They can be mounted anywhere, including fast-moving objects like trains and small airplanes.

The Starlink Terminal has motors to self-adjust the optimal angle to view the sky, earning it the internal nickname "Dishy McFlatface". This innovative design makes it easy to deploy and use.

Starlink offers a paid-for beta service called "Better Than Nothing Beta" in the US, which includes a user terminal and charges $499. This service provides "50 to 150 Mbit/s and latency from 20 to 40 ms over the next several months".

A larger, high-performance version of the antenna is available for use with the Starlink Business service tier. This indicates that Starlink has different options for users with varying needs.

Telesat Lightspeed terminals, on the other hand, will be easy to deploy and will self-acquire the satellite network. They will provide Mbps to Gbps data rates with Metro Ethernet Forum (MEF) compliant interfaces for seamless integration to customer’s terrestrial networks.

The Starlink Mini, a portable user terminal, was announced to be imminently available in June 2024, supporting 100 Mbit/s of download speed and fitting in a backpack. This is a significant development for users who need a more portable option.

Trials began at McMurdo Station in Antarctica in September 2022, marking a significant milestone in the development of this technology.

This remote location was chosen for its unique challenges, as Antarctica has no ground stations, requiring the use of polar-orbiting satellites with optical interlinks to connect to ground stations in South America, New Zealand, and Australia.

Field missions began in December 2022, demonstrating the technology's capabilities in a real-world setting.

Internet access varies greatly across the globe, with some countries having almost universal coverage and others struggling to reach even a small percentage of their population.

In the United States, for example, internet access is widespread, with over 90% of households having a broadband connection. In contrast, some African countries like Burundi have a mere 1.5% of their population online.

The internet penetration rate in South Korea is a staggering 98%, making it one of the most connected countries in the world. This high level of access has contributed to South Korea's status as a global leader in technology and innovation.

In some countries, internet access is not just limited but also heavily restricted, such as in North Korea where the government tightly controls online activity. This has significant implications for the country's economic and social development.

For more insights, see: Internet Access

T-Mobile US and SpaceX are partnering to add satellite cellular service capability to Starlink satellites, providing dead-zone cell phone coverage across the US.

The service is powered by Starlink's Direct to Cell satellites, which will offer text messaging, voice, and limited data services to customers.

T-Mobile connects to Starlink satellites via existing 4G LTE mobile devices, unlike previous generations of satellite phones, which used specialized radios, modems, and antennas.

Bandwidth will be limited to 2 to 4 megabits per second total, split across a very large cell coverage area, which would be limited to thousands of voice calls or millions of text messages simultaneously in a coverage area.

The first six cell phone capable satellites launched on January 2, 2024.

Rogers Communications signed an agreement with SpaceX for using Starlink for satellite-to-phone services in Canada in April 2023.

One NZ and Optus have also partnered with SpaceX's Starlink to provide 100% mobile network coverage in New Zealand and Australia, respectively.

SMS text service is expected to begin in 2024 for these regions, with voice and data functionality in 2025.

Ukrainian cell operator Kyivstar conducted Eastern Europe's first test of the Direct-to-Cell service with their CEO and digital transformation minister of Ukraine exchanging messages with regular smartphones in August 2025.

Telesat is testing and working with leading manufacturers to ensure that cost-effective, high-performing customer terminals are available to access the Telesat Lightspeed network.

Telesat Lightspeed terminals will be easy to deploy and will self-acquire the satellite network, providing Mbps to Gbps data rates with Metro Ethernet Forum (MEF) compliant interfaces for seamless integration to customer’s terrestrial networks.

Starlink Maritime became available in July 2022, providing internet access on the open ocean, with speeds of 350 Mbit/s, requiring purchase of a maritime-grade $10,000 user terminal and a $5,000 monthly service fee.

SES announced a satellite internet service for cruise lines using both the Starlink satellites in Low Earth Orbit (LEO) and SES' own O3b mPOWER satellite constellation in Medium Earth Orbit (MEO), providing high-speed, secure connectivity at up to 3 Gbit/s per ship.

Starlink speeds are expected to improve as more satellites are deployed, according to SpaceX.

Here's an interesting read: Satellite Internet Access