Started operation of "Galileo" satellite navigation system with higher accuracy than GPS

Speaking of satellite-based navigation systems (positioning systems)GPS"Is well known. It is no longer a synonym for the navigation system, but GPS is the system operated by the US Department of Defense to the last. In contrast to this, private-sector satellite positioning systems in Europe "GalileoThe development of the system was completed and the operation was finally started on December 15, 2016.

What is Galileo? / Galileo / Navigation / Our Activities / ESA
http://www.esa.int/Our_Activities/Navigation/Galileo/What_is_Galileo


Galileo navigation satellite system goes live | Science | DW.COM | 15.12.2016
http://www.dw.com/en/galileo-navigation-satellite-system-goes-live/a-36422029

The satellite navigation system is a mechanism to know the position and course by receiving signals transmitted from the plurality of artificial satellites to the ground. US Navy submarine launch ballistic missilePolarisThe satellite "Transit" launched to provide the position information to the submarine equipped with it is known as a pioneer presence. The transit launched in 1960, after testing, began to be used by the Navy in 1964, and many private vessels also benefited from 1967 to 1991.

On the other hand, the US Army created a satellite navigation system called "SECOR" separately from the Navy's transit, the Air Force also promoted the project "621 B", and furthermore a system that accurately grasps the positional relationship between the satellites "Timation" It was made separately. However, this system is called "GPS" with the concept of "NAVSTAR (Nabstar)" that was born by being integrated because it is inefficiently made if it is made separately.

Similarly, there are Russian "GLONASS" and Chinese "Hokuto" as satellite navigation systems mainly made for military purposes. The first satellite navigation system created by the private sector entity, "Galileo" which began operation this time.

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The Galileo project began 17 years ago, 1999. EU and the European Space Agency (ESA) were prestigious projects to stop relying on GPS operated by the US Department of Defense, but due to pressure and financial problems in the United States, The person in charge"Galileo is almost dead"Such a difficulty was hit.

However, the EU and WSA continued the project without giving up and in 2005 launched the first test satellite. After that, even further money issues will spurt, we will launch a demonstration satellite from 2011 in addition to the additional support by public money, launch full-function satellite from 2014, we have started operation. As of the beginning of November 2016, we had successfully launched 12 fully functional satellites, two failed. Ultimately we are planning to operate 30 satellites.

The feature of Galileo is that there is no deterioration / interruption of service due to possible military reasons in GPS, and the accuracy is 1 m even with free open service.In case of paid service, accuracy will increase to several cmIt is said that.

The state of the launch on November 29, 2016 was like this.

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