Why narrow band

Box , Alexandria, Egypt. In the communication systems, many information bearing signals are transmitted by service type of carrier modulation. The channel over which the signal is transmitted is limited in bandwidth to an interval of frequencies centered at the carrier as in the double side-band modulation techniques, Fig.

News and Special Offers occasional. Techopedia Explains Narrowband. What Does Narrowband Mean? Techopedia Explains Narrowband Narrowband is typically implemented in telecommunication technologies to carry voice data on a limited number of frequency sets. Share this Term. Related Terms Bandwidth Band. Ultra Mobile Broadband Radio Frequency. Tech moves fast!

Stay ahead of the curve with Techopedia! Join nearly , subscribers who receive actionable tech insights from Techopedia. The band center and its bandwidth are key in determining how precise a multispectral sensor is.

On the contrary, narrow band sensors capture the reflectance of a very specific area of the spectrum. This yields information that is more precise and insightful about subtle changes that may be happening at key points. The red edge band is located between the red and NIR bands and plays a key role in deriving plant chlorophyll content.

When comparing the red, red edge and NIR bands, the largest magnitude of change shows up in the red edge band, therefore it is the most critical to measure. A wide red edge waveband would likely overlap with neighboring bands and suffer from data contamination, resulting in a less precise measurement.

The bandwidths of a multispectral sensor will also impact the vegetation indices resulting from the collected data. Vegetation indices are created by combining different bands to highlight certain features in the vegetation. Instead, a narrow band camera will collect more precise measurements, resulting in indices capable of detecting changes in the health of the plant at early stages. In agriculture, broadband sensors, such as converted cameras, work well for the big picture, allowing for the generation of RGB maps and generic indices like NDVI.

However, the information provided by these cameras is limited and does not allow further analysis of the field over time. A narrow band camera, on the other hand, provides more detailed and accurate information by capturing precise measurements of specific wavelengths, which allows for early detection of health issues. This gives farmers more tools and information to enable them to make better management decisions. To view the different vegetative indices available in Atlas, check out our example data set.

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