For a long time, the Indian Army has been relying on American GPS and Russian GLONASS to support the corresponding weapon systems. India is determined to develop IRNSS, focusing on preventing being controlled by others. So IRNSS did a good job in the Indian military. According to the Indian military, IRNSS can improve the Indian army's ability in precision strike, battlefield control and mastering the position of troops. However, in terms of civilian use, IRNSS has been in a state of "pretending to be dead". It was originally scheduled to serve local telecommunications in India in the first half of 2020, but the whole first half of the year has passed and there is still no news. As can be seen from the parameters of Indian mobile phones, there are almost no mobile phones supporting IRNSS.
Qualcomm officially announced its support for the Indian IRNSS navigation satellite system in June 20 19, which will be launched on some Snapdragon mobile platforms released at the end of 20 19. In February, 2020, Qualcomm actually released three low-end smart phone chips: Snapdragon 720G, Snapdragon 662 and Snapdragon 460, which supported Indian IRNSS, but failed to reach Snapdragon 865.
Status quo of IRNSS IRNSS has been launched nine times, of which the backup satellite launched in August 20 17 failed (to replace the first satellite IRNSS- 1A launched in July 20 13), and the fairing did not open as planned. In other words, seven IRNSS satellites are still in orbit. IRNSS- 1A was damaged before, 1 failed to launch, and 1 failed IRNSS- 1A was added.
IRNSS has three geostationary satellites located at 34 degrees, 83 degrees and 132 degrees respectively. The other four satellites are located in an orbit with an inclination of 29 degrees, and intersect at the equator of 55 degrees east longitude and11degree east longitude respectively.
IRNSS has completed the initial networking of seven satellites, which can provide accurate positioning, navigation and timing services for users in India and its border areas 1500 km. The positioning accuracy of the main service area is better than 20m.
However, IRNSS is not the end of India's space program. India is also preparing to continue to launch about 10 navigation satellites, eventually forming an Indian version of the "global positioning system", but there is no detailed launch plan and launch time. Indian IRNSS is not as good as China's second-generation system, and there is still a gap of 5~ 10 years from Beidou satellite navigation system. The development of Beidou satellite navigation system in China is divided into three steps: the first generation Beidou system, the second generation Beidou system and the third generation Beidou system. Among them, the first generation is also called "Beidou satellite navigation test system", and three geostationary orbit satellites are experimental. Since the second generation, Beidou system has been officially called "Beidou Satellite Navigation System". The second generation Beidou system includes 14 satellites, including 5 geostationary satellites, 5 tilted geosynchronous satellites and 4 medium earth orbit satellites. The second generation Beidou system began to provide users with regional positioning services in the Asia-Pacific region from 2012165438+10.
At present, the third generation Beidou system is used, with 55 satellites in orbit (including the second generation Beidou 14 satellite), which can realize the positioning and timing service in any corner of the world. The accuracy of spatial signal is better than 0.5 meters, and its spatial signal continuity, integrity and usability design are among the highest in the world. The third generation Beidou system opened its global positioning function in advance in 20 18, and was officially opened on July 3 1 2020. India is bound to build "South Asia Beidou", but it is difficult to produce, not as good as the second generation Beidou system. Due to Indian's insufficient ability in the field of satellite navigation and the design limitation of the system, the overall performance of IRNSS is far less than that of American GPS and Russian GLONASS, and also lower than that of China's second generation Beidou system.
India claims to be a self-developed IRNSS, but it still relies heavily on international cooperation in key technical fields such as high-precision timing, communication algorithms and core chips. Key components such as on-board atomic clocks need to be imported from western countries. Once hit by the sanctions stick waved by the United States everywhere, the core technology of IRNSS will immediately lose its function. In addition, there are still many difficulties in the debugging and testing of satellites and payloads, constellation networking and operation control. The above personal views are welcome to criticize and correct. Agree with me, please like to go again, thank you! If you like me, please pay attention to me. Thanks again!