Lidar Remote Sensing Applications: Ready and Waiting

2005 ◽  
Vol 883 ◽  
Author(s):  
John F. Hahn

AbstractIn this note, lidar materials, ready and waiting, will be discussed. Most lidar applications depend upon “Ready” materials, conventional materials that are part of a design solution to the application. Lidar systems already operating and serving the needs of communities in atmospheric, earth and planetary sciences, include airborne terrain mapping, airborne bathymetric mapping, ground-based imaging rangefinding and ceilometry are included in this category. Even in space application, “Ready” spaceborne applications include orbital rendezvous and docking, precision landing/hazard avoidance and Martian atmospheric evaluation. Other applications, however, have particular materials needs and constitute “Waiting” systems. These include in particular spaceborne differential absorption lidar (DIAL) for the measurement of important trace species such as ozone and water vapor in the Earth's atmosphere (ORACLE, WALES). An evaluation of critical issues facing mission-enabling lidar materials development will be presented, based upon Optech Incorporated's direct experience in these areas.

1986 ◽  
Vol 1 (4) ◽  
pp. 3-15 ◽  
Author(s):  
Deborah A. Kuchler ◽  
David L.B. Jupp ◽  
Daniel B. van R. Claasen ◽  
William Bour

1997 ◽  
Vol 08 (01) ◽  
pp. 179-231 ◽  
Author(s):  
Alistair Moffat ◽  
Timothy C. Bell ◽  
Ian H. Witten

Most data that is inherently discrete needs to be compressed in such a way that it can be recovered exactly, without any loss. Examples include text of all kinds, experimental results, and statistical databases. Other forms of data may need to be stored exactly, such as images—particularly bilevel ones, or ones arising in medical and remote-sensing applications, or ones that may be required to be certified true for legal reasons. Moreover, during the process of lossy compression, many occasions for lossless compression of coefficients or other information arise. This paper surveys techniques for lossless compression. The process of compression can be broken down into modeling and coding. We provide an extensive discussion of coding techniques, and then introduce methods of modeling that are appropriate for text and images. Standard methods used in popular utilities (in the case of text) and international standards (in the case of images) are described.


Sign in / Sign up

Export Citation Format

Share Document