iridium constellation satellites

iridium constellation satellites插图

Iridium’s constellationConstellationIn modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). These areas mostly had their origins in Western-traditional asterisms from which the constellations take their names. There are 88 officially recogniz…en.wikipedia.orgconsists of66cross-linked operational satellites, plus six in-orbit spares. The satellites operate in near-circular low-Earth orbits (LEO) about 780 km (483 miles) above the Earth’s surface. There are 11 satellites in each of six orbital planes and their orbits “crisscross” roughly over the north and south poles.

How many satellites have Iridium launched?

How many satellites does iridium have? The original Iridium constellation of 66 satellites plus 6 spares was launched between May 5, 1997 and May 17, 1998. A comprehensive plan to replenish the Iridium constellation, known as Iridium NEXT will launch 66 new satellites to replace the current constellation, with launches expected to begin in 2015.

Does the Iridium project use satellites?

The satellites of the Iridium network cover the entire earth with connectivity unmatched by any other communications provider. The first Iridium satellite was deployed in 1997 and the network was fully operational in 1998. In 2019, Iridium completed an upgrade to the Iridium constellation, replacing all satellites without ever disrupting service.

Are Iridium satellites Geostationary?

The first Iridium satellite was deployed in 1997 and the network was fully operational in 1998. In 2019, Iridium completed an upgrade to the Iridium constellation, replacing all satellites without ever disrupting service. Most other networks use geostationary orbit (GEO) at about 35,000 kilometers (22,000 miles) from the planet.

What is an Iridium satellite?

The Iridium satellite constellation was conceived in the early 1990s as a way to reach high Earth latitudes with reliable satellite communication services. Early calculations showed that 77 satellites would be needed, hence the name Iridium, after the metal with atomic number 77.

How far is Iridium from Earth?

At only 780 kilometers from the Earth, Iridium’s LEO network means pole-to-pole coverage, shorter transmission paths, stronger signals, lower latency, and shorter registration time than with GEO satellites. Download Fact Sheet.

What is iridium mesh?

Iridium’s crosslinked mesh architecture creates a web of coverage encompassing 100% of the planet from Low-Earth Orbit, providing low-latency, weather resilient services unlike any other satellite provider. No other network matches the reach, coverage, and reliability of Iridium.

What is the L-band of Iridium?

Iridium’s LEO network uses L-band frequencies to communicate with the users. These frequencies are more resilient to weather than the frequencies used by most GEO networks, providing reliable communications even in adverse conditions in the air, on the sea, or on the ground.

What is a satellite network monitoring team?

This team provides 24/7 monitoring of the network, processes voice and data traffic, conducts systems integration testing, develops software upgrades for new technologies, and supports the network of terminals that communicate to and from the satellites.

What is gateway in phone?

The gateway processes the message or call, then delivers it to the carrier, internet, or customer.

Does Iridium have low orbit?

Additionally, the unique structure of Iridium’s Low-Earth Orbit allows satellites to converge at the poles, ensuring coverage in the remote high-latitude regions where no other satellite provider has coverage.

Can Iridium help in space?

This also means when the satellites eventually reach the end of their lives, Iridium engineers can carefully and safely de-boost and de-orbit each one from space, helping keep space clean and sustain it for future missions.

Bringing it Back to Earth

Iridium is a global satellite communications company, providing access to voice and data services anywhere on Earth.

Your World

Trusted by millions of users in markets across the globe, Iridium connects you to the things that matter the most.

Our Network

Iridium’s unique constellation architecture makes it the only network that covers 100% of the planet. Satellites are cross-linked to provide reliable, low-latency, weather-resilient connections that enable communication anywhere in the world.

Our Enabling Technologies

At the heart of every Iridium Connected device is a module that enables connectivity between that device and the Iridium network. Once connected, communications to virtually any other voice or data device on the planet is possible.

How many satellites are connected to the Iridium Next?

It will ensure the delivery of high-quality voice and data coverage across any location on Earth. Each Iridium NEXT satellite is connected to two satellites in the same orbital plane, as well as one in each neighbouring plane.

How long does an Iridium satellite last?

Each satellite is designed to deliver a service life of 15 years. The satellite constellation is intended to offer higher bandwidth and data speeds, allowing Iridium to cater to the growing demand for worldwide mobile communications.

What is the payload of the Dnepr?

The Dnepr launch vehicle is based on the SS-18 inter-continental ballistic missile (ICBM). It has a launch mass of 210t and can carry a maximum payload of 3,200kg in standard space head module (SHM) configuration.

When was the Iridium Next satellite launched?

The first ten Iridium NEXT satellites were launched in January 2017. Image: courtesy of Iridium Communications Inc. Each satellite in the Iridium NEXT constellation is cross-linked to other satellites in the constellation. Image: courtesy of Iridium Communications Inc.

How much weight can a Falcon 9 carry?

Falcon 9 is a two-stage launch vehicle with a launch mass of 505,846kg. It can deliver 13,150kg of payload to LEO and 4,850kg of payload to geostationary transit orbit (GTO).

What is the satellite’s hardware?

The satellite is equipped with sophisticated onboard processing hardware and software, including a regenerative processing payload with on-board processor (OBP) and a time-division duplex (TDD) architecture, as well as a telemetry, tracking, and control (TT&C) subsystem.

What is independent constellation?

The independent constellation offers uninterrupted services in the event of natural disasters that often damage ground telecom networks.

How many satellites are in the Iridium constellation?

The Iridium Constellation. It is composed of 66 operational satellites (11 sats x 6 polar orbital planes), 9 spares and 6 on-ground spares. Operational satellites fly at 780km altitude, giving them an orbital period of 100.4 minutes. Thanks to this layout, the constellation covers the entire planet at any given time, …

What is a non-operational satellite?

Non-operational sats consist of older satellites being deorbited and newer satellites being put into position. Iridium NEXT. The original Iridium constellation launched in 1997-1998. Following poor business performance and bankrupcy, new owners decided to completely replace the constellation with a new generation, Iridium NEXT.

What satellites will allow superior data communications with higher speeds?

Iridium NEXT satellites will allow superior data communications with higher speeds, and will host third-party payloads such as ADB-S receivers to track airliners, and AIS ship-trackers.

How high do spares orbit?

Spares orbit at a lower altitude (750-770km) and a higher speed so they constantly change location vs. operational satellites. They can replace a faulty satellite by raising their orbit when reaching the right location.

Do iridium satellites produce flares?

The original Iridium satellites produced a flare visible from the ground, reflecting the sunlight to the area of an observer at a fixed position for a few seconds. Iridium NEXT satellites have a different shape and do not produce flares, unfortunately for satellite observers. © All rights reserved.

What is iridium next?

Iridium-NEXT is a low-orbiting communications satellite system operated by Iridium Communications Inc. as the company’s second generation global communications system for satellite calls and data transfer. Comprised of 66 active satellites in orbit, Iridium-NEXT delivers full global coverage on a 24/7 basis and, through a unique Public-Private Partnership – offers unprecedented access to Earth observation data by flying hosted payloads on each of the constellation spacecraft.

How fast is the Iridium Next satellite?

The Iridium-NEXT satellites connect to mobile and Iridium OpenPort terminals through L-Band at data speeds of up to 128kbit/s and 1.5Mbit/s, respectively, while a high-speed Ka-Band service at up to 8Mbit/s will be available for larger fixed and transportable terminals. Each satellite then connects to up to four constellation members via a Ka-Band inter-satellite link – two neighboring satellites in front and behind within the same orbital plane and two satellites in neighboring planes to either side to route the information to and from its destination.

How many satellites are needed for the Iridium project?

An early calculation showed that 77 satellites would be needed to achieve full global coverage and the project was named Iridium for the metal with atomic number 77 (with 77 electrons circling the nucleus, representative of the constellation around Earth). Image: Iridium.

Why was the Iridium constellation created?

The Iridium constellation was conceived in the late 1980s to improve communications at high Earth latitudes where services from Geostationary Satellites may not be available due to their low position in the sky.

How long will the Iridium satellites last?

The Iridium-NEXT satellites have a projected mission life of at least 15 years, ensuring services will be extended to 2030 and beyond with risk mitigation through placing six spares in orbit in addition to the 66 active constellation satellites and maintaining nine spares on the ground to be launched when new spares are required.

What is iridium satellite?

Iridium is a Mobile Satellite Services provider, offering worldwide voice and data communications through satellite phones and other transceiver units with truly global coverage including the polar regions, the vast oceans and airways.

What is an ellite bus?

ELiTeBus provides a flight-proven solution with extensive flight heritage in all major system components. The platform has a mass of around 450 Kilograms and can facilitate payloads of 300kg or more. The satellite bus is trapezoidal in shape, consisting of rigid aluminum honeycomb panels that build the structural backbone of the satellite and support all subsystem components.

How Does Iridium Cover the Entire Earth?

That’s more satellites than any other constellation and one of the things that makes Iridium unique. Several overlapping satellites ensure the entire globe is covered, and this is one of the many reasons that tough customers, like the U.S. military, rely on Iridium.

How many miles per hour does iridium travel?

Iridium satellites orbit at an altitude of 485 miles (780 km), circling the earth once every 100 minutes, travelling at 16,832 miles per hour.

What is iridium satellite?

About Iridium. Iridium operates the largest and most technologically advanced satellite network in the world, making it the only network to offer coverage over every inch of the planet. Uniquely, Iridium satellite coverage spans the North and South Poles and every inch of land, sea or sky in between. Why take chances with one-way devices, spotty …

What is a Zoleo device?

ZOLEO is Iridium Connected. ZOLEO devices are Iridium Connected? so you can be assured that you’ll have access to the farthest reaching and most reliable satellite network in the world*, when you need it!

What are the effects of crosslinks on iridium?

Cross-links also make the Iridium network particularly impervious to natural disasters — such as hurricanes, tsunamis and earthquakes - which can damage traditional land-lines and cell towers. If playback doesn’t begin shortly, try restarting your device.

Is iridium network secure?

Messages are routed among Iridium satellites without touching the ground, creating a highly secure and reliable connection. Cross-links also make the Iridium network particularly impervious to natural disasters — such as hurricanes, tsunamis and earthquakes – which can damage traditional land-lines and cell towers.

Which countries are prohibited from providing products/service?

As such it is prohibited from providing products/service in the following countries: Taliban control led Afghanistan, China, Cuba, India, Iran, North Korea, Syria and Sudan. Each country is different and regulations may change without notice. Always check with the local Consulate or Customs offices for info.