Enhanced-performance BOTDA sensing through optimized pulse coding and low-RIN bidirectional Raman amplification
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An enhanced-performance BOTDA sensor is presented combining low-RIN distributed Raman amplification and RZ Simplex-pulse coding. Results demonstrate for first time 1 m spatial resolution over 120 km distance with 1.3°C/26 μϵ resolutions
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In physics and geosciences, the term spatial resolution refers to distance between independent measurements, or the physical dimension that represents a pixel of the image. While in some instruments, like cameras and telescopes, spatial resolution is directly connected to angular resolution, other instruments, like synthetic aperture radar or a network of weather stations, produce data whose spatial sampling layout is more related to the Earth's surface, such as in remote sensing and .
Image resolution is the level of detail an holds. The term applies to digital images, film images, and other types of images. "Higher resolution" means more image detail. Image resolution can be measured in various ways. Resolution quantifies how close lines can be to each other and still be visibly resolved. Resolution units can be tied to physical sizes (e.g. lines per mm, lines per inch), to the overall size of a picture (lines per picture height, also known simply as lines, TV lines, or TVL), or to angular subtense.
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