In November, China launched the world’s first pulsar navigation test satellite sql2005安装图解

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November to choose China launched the world’s first pulsar navigation test satellite solar wing spreading picture space Tencent news (Qiao Hui) according to the China Aerospace Science and Technology Corporation Fifth Research Institute of China, the world’s first pulsar navigation test satellite (XPNAV 1) will be launched in November to choose. By using the collimating micro channel plate detector and the focusing detector, the X ray signal emitted by the pulsar is measured, and the feasibility of the pulsar navigation system is verified. In 1967, Jocelin Baer, the interplanetary scintillation observation study, accidentally discovered a hidden radio pulse source, the cycle is very stable, every 1.3373 seconds to record a pulse signal, called pulsar. Pulsar is a neutron star of high speed rotation, its typical radius is only 10 km, but the quality of the whole sun can be the same quality, except for the largest density of objects outside the black hole. The quality of pulsars per cubic centimeter is 10 tons, equivalent to the mass of all human beings. Pulsar signal radiation in radio, infrared, visible light, ultraviolet rays and gamma rays, X electromagnetic wave band (figure for the Crab Nebula star pulse radiation in various bands on). The pulsar has extremely stable period, the stability of the hydrogen maser is the most stable even higher than the current 10 thousand times (the current international time standard is atomic time system), known as the most accurate astronomical clock. Up to now, more than 2 thousand pulsars have been discovered and catalogued, of which about more than and 160 pulsars have good X – ray radiation characteristics. Why is the pulsar X ray navigation? Radio navigation? X ray belongs to high energy photon, which concentrates most of the energy of pulsar, and is easy to be miniaturized. On the contrary, radio waves require huge receiving antennas and other facilities. Schematic diagram of X ray binary system. The basic principle of pulsar navigation X ray pulsars in the universe as the "Lighthouse", rely on the polar X ray pulse signal stability for self generated, for near earth and deep space exploration and interstellar spacecraft provide high precision position, velocity, time and attitude of the rich autonomous navigation information service, so as to realize the spacecraft long time high precision autonomous navigation and precision control, has a broad prospect of Engineering application. The pulsar navigation test satellite is equipped with two kinds of detectors, one is the collimating microchannel plate detector, the other is the grazing incidence focusing detector. These two kinds of X – ray pulsar detection technology are the first in orbit. Two kinds of detectors in the performance detection task can be completed each one has his good points, independent. The effective detection area of the micro channel plate detector is large, and the time required for the pulsar observation is short. In order to solve the problem of "visible" on the orbit of X – ray pulsars, two different kinds of pulsar detectors are used in orbit test. On the one hand through a variety of detection technology of pulse star scientific data on orbit observation to obtain the first hand of X ray, further study related to science; on the other hand, also provide actual data support for the technology development direction of the pulsar detector in the future.相关的主题文章:

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