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Remote Sensing (oceanography)
Remote sensing in oceanography is a widely used Observational techniques, observational technique which enables researchers to acquire data of a location without physically measuring at that location. Remote sensing in oceanography mostly refers to measuring properties of the ocean surface with sensors on satellites or planes, which compose an image of captured electromagnetic radiation. A remote sensing instrument can either receive radiation from the Earth’s surface (passive), whether reflected from the Sun or emitted, or send out radiation to the surface and catch the reflection (active). All remote sensing instruments carry a sensor to capture the intensity of the radiation at specific wavelength windows, to retrieve a spectral signature for every location. The physical and chemical state of the surface determines the emissivity and reflectance for all bands in the electromagnetic spectrum, linking the measurements to physical properties of the surface. Unlike passive instrume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Observational Techniques
In marketing and the social sciences, observational research (or field research) is a social research technique that involves the direct observation of phenomena in their natural setting. This differentiates it from experimental techniques, experimental research in which a quasi-artificial environment is created to control for spurious factors, and where at least one of the variables is manipulated as part of the experilovement. In context Observational research is a method of data collection that has become associated with qualitative research. Compared with quantitative marketing research, quantitative research and experimental techniques, experimental research, observational research tends to be less reliability (psychometric), reliable but often more validity (psychometric), valid. The main advantage of observational research is flexibility. The researchers can change their approach as needed. Observational research measures behavior directly, rather than the subject's self-re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
