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Mapping From Space
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The airborne Remote Sensing technical system
of the Chinese Academy of Sciences1
Tong Qingxi
The Joint Center for Remote Sinsing of CAS China
Abstract
During the last five years, by giving full play to the advantages of integrated technologies and multidiscipline research capabilities of the Chinese Academy of sciences, and Airborne Remote Sensing Research and Technical System has been developed. This system includes the airborne remote sensing information acquisition, information processing, information analysing and applications. In this paper the description of technical system was focused. The airborne remote sensing technical system consists of high-altitude platform, multi-sensors system, remote sensing pre-processing, the integrated monitoring, control and recording system, the air to ground information transmission system. The system is characterized by its integrity of sensors system, the extensive spectral coverage, the completeness of operation models and flexibility of data acquisition. In addition, it has the great potential both of remote sensing operation and technological development. This system has played important role in remote sensing of resources and environment, urban survey, surveying and mapping, engineering planning, geological and mineral exploration, castal survey, disaster monitoring, and other applications.
Introduction
Since the launch of the first Earth Resources Satellite of the United States, the remotes sensing technology has been gradually developed to practical use. The field of applications has been expended increasingly, its benefits have been remarkable. As an important component part of the remote sensing science and technology, the airborne remote sensing has obvious advantage and a indispensable role in recent years, when the satellite remote sensing has highly developed. The main advantages of its are the high flexibility, large load capability, multi-sensors combination and the ability of data acquisition with high resolution. It also can obtain images with large area coverage in case of flight over 10,000m. As an remote sensing system, airborne remote sensing is
still in service for natural resource inventory, environmental monitoring, desaster monitoring and topographic mapping etc. in most countries in the world.
Recently, The development of high performance and high altitude light aircraft has caused the great attention in the world's remote sensing community. Such aircraft were equiped as special remote sensing aircraft in many countries due to its small in size, light in weight, excellence of take off, landing and flexibility of flight. The airborne remote sensing technical system of CAS is just based on two Cessna citation type aircraft to bring about the multi-sensors detection. It is suitable for multidiscipline and multiplications requirements. As technical intefrated system, the airborne system of CAS is much seldom outside China and its is just the contribution of CAS to the development of remote sensing in China.
The composition of system
The Airborne Remote Sensing System established in CAS consists of 3 parts:
- Airborne Based System
Various optical, infrared, microwave, laser and other sensors are involved in this system. The sensors might be operated not only separately, but also in combination with each other to acquire the multi-information in accordance with the mission requirement and by control of on board Integrated Monitoring & Control System. In case of necessity the data can be transmitted real-timely and directly from aircraft to ground by on-board Data Transmission System.
- Ground-based System
The main function of this System are the pre-processing, precision processing, analysing and mapping of information, acquired by remote sensing aircraft. The system consists of optical and photo-processing system, digital image processing system, information analysing and cartographic system and ground information receiving system.
- Research & Development and Technical Support System.
Although, this system doesn't connect directly with the airborne information, but it is an un-separated important part of airborne remote sensing system. This system incorporated mainly the sensors calibration system, remote sensing spectral measurement and spectral data bank system and the test sites etc.
1. This study started from 1986 is one of Scientific and Technological Development Program of National "Seventh-Give Year" plan. More than 10 Institutions were contributed in this joint project. There are: Institute of Remote Sensing Application, Institute of Electronics, Shanghai Institute of Technical Physics, the Center for Space Science and Application, the Ground Receiving Station,' Shanghai Institute of Optics and Fin Mechanics, Anhui Institute of Optics and Fine-Mechanics, Changchun Institute of Optics and Find-Mechanics, and Changchun Institute of Geography of Chinese scademy of Sciences and Shanghai Transportation University, Beijing University of Post and Communication Technologies, Qinghua University and Tainjin University.
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