1992. -510 р.
The Laser is one of the most versatile tools ever invented. Lasers are likely to revolutionize computers and communications, replacing electronics with optoelectronics; they have performed delicate microsurgery on single cells, and might one day be used from space battle stations to destroy missiles. It therefore should not come as a great surprise that they have an important role in the field of remote sensing, for their special properties make them ideal for probing the environment. Indeed, the laser's capability of performing an analysis at a distance effectively adds a new dimension to remote sensing. The range and kind of applications made possible are quite extraordinary. For example, a ground-based laser remote sensor has been able to distinguish sodium atoms from the much larger concentration of other species at an altitude of 90 km. What is even more remarkable is that this system was able to effectively count the atoms at this altitude when their density was less than 1000 per cubic centimeter
The Laser is one of the most versatile tools ever invented. Lasers are likely to revolutionize computers and communications, replacing electronics with optoelectronics; they have performed delicate microsurgery on single cells, and might one day be used from space battle stations to destroy missiles. It therefore should not come as a great surprise that they have an important role in the field of remote sensing, for their special properties make them ideal for probing the environment. Indeed, the laser's capability of performing an analysis at a distance effectively adds a new dimension to remote sensing. The range and kind of applications made possible are quite extraordinary. For example, a ground-based laser remote sensor has been able to distinguish sodium atoms from the much larger concentration of other species at an altitude of 90 km. What is even more remarkable is that this system was able to effectively count the atoms at this altitude when their density was less than 1000 per cubic centimeter