disadvantages of radar remote sensing

2. Radar and infrared sensors are complimentary instruments … Disadvantages of remote sensing for land evaluation 1. 3. •It is not cost-effective to map a large area using an airborne remote sensing system. Requires specialized training for analysis of images. Large scale engineering maps cannot be prepared from satellite data. 2. There are disadvantages, such as the non-unique spectral properties of the returned radar signal. Remote sensing is a relatively cheap and constructive method reconstructing a base map in the absence of detailed land survey methods. Ineffective during heavy rain or low hanging clouds: LiDAR pulses may be affected by heavy rains or low hanging clouds because of the effects of refraction. •The disadvantages are low coverage area and high cost per unit area of ground coverage. Disadvantages of remote sensing: Remote sensing is a fairly expensive method of analysis especially when measuring or analyzing smaller areas. Advantages of remote sensing technology: 1. Remote sensing requires a special kind of training to analyze the images. RADAR cannot provide the user with the precise image of an object because of the longer wavelength. •An advantage of airborne remote sensing, compared to satellite remote sensing, is the capability of offering very high spatial resolutionimages (20 cm or less).

Unlike infrared data that help us to identify different minerals or vegetation types from reflected sunlight, radar only shows the difference in the surface roughness and geometry and moisture content of the ground (the complex dielectric constant). Disadvantages of Remote sensing 1.
RADAR can easily operate in cloudy weather conditions, and at night. They are not direct samples of the phenomenon, so must be calibrated against reality.

It is therefore expensive in the long … Disadvantages of LiDAR High operating costs in some applications: Although LiDAR is cheap when used in huge applications, it can be expensive when applied in smaller areas when collecting data. This calibration is … Disadvantages of RADAR Usage Shorter wavelength does not allow the detection of small objects. Longer operating distance. Expensive for small areas, particularly for one time analysis. Large area coverage: Remote sensing allows coverage of very large areas which enables regional surveys on a variety of themes and identification of extremely large features.

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