explain the advantages and limitations of remote sensing

• 8 September 2023

ADVANTAGES OF REMOTE SENSING: Allows coverage of very large areas. To properly respond to natural and human-induced stresses to wetlands, resource managers must consider their functions and values. The subjectivity in interpretation can limit the reliability and usefulness of remote sensing data in some applications. So I contacted him and he cast the spell and gave me the hot figures. The technology can help in wildlife conservation, resource management, and ecological research. The limitations in data processing can limit the usefulness and accessibility of remote sensing data in some applications. Remotely sensed data on natural and anthropogenic factors including plant cover, land use, topography, and hydrography are currently being used to feed a variety of simulation models, including hydrologic, climatic, ecological, and economic models. Remote Sensing can allow covering a very large area. What are the band designations for the Landsat satellites? The terrestrial hydrosphere includes water on the land surface and underground in the form of lakes, rivers, and groundwater along with total water storage. Real-time data also helps in monitoring dynamic processes, such as weather patterns, and predicting changes. Your email address will not be published. english language past papers kcse history notes It utilizes various instruments, such as cameras, sensors, and scanners, to capture data from a distance. Remote sensing raises ethical considerations, particularly when used for military, surveillance, or intelligence purposes, which can have implications for human rights, privacy, and security. The data can aid in decision-making and response planning, and help in monitoring and managing the recovery process. history This is great for determining the height of things like trees and buildings. Point Cloud Software Analyzes Data Quickly. The interagency Civil Applications Committee (CAC) facilitates the appropriate civil uses of overhead remote sensing technologies and data collected by military and intelligence capabilities, including from commercial sources. Remote sensing can be affected by electromagnetic interference, such as radio waves, power lines, and other sources of electromagnetic radiation, which can affect the quality and accuracy of the data. Example = detection of infrared radiation or the x-ray image. Sometimes large-scale engineering maps cannot be prepared from satellite. Remote sensing is an important tool for monitoring wetland responses to changes in the hydrologic regime and water quality caused by global climate change and sea-level rise. These sensors measure land and sea surface temperature, vegetation properties, cloud and aerosol properties, and other physical attributes. Microwave energy has wavelengths that can pass through clouds, an attributeutilized by many weather and communication satellites. Examples: Satellites, aircraft, drones, and aerial photographs, active remote sensing this involves sending radiation out and then measuring the radiation that the earth is sending back e.g ocean current, passive remote sensing measures the energy that is radiated from the earth e.g temperature. Remotely sensed images, as well as the products produced from imaging analysis, are key data sources for geographic information systems (GIS). Tracking clouds to help predict the weather or watching erupting volcanoes, and help watching for dust storms. The term "radio detection and ranging" is an abbreviation for "radio detection and range." Advantages and Disadvantages of Remote Sensing - CBSE Library Remote sensing has therefore become an important research and application tool in a variety of fields, including engineering, geology, geography, urban planning, forestry, and agriculture. water and agriculture etc. Disadvantages of remote sensing include limited resolution and accuracy, lack of direct contact, weather conditions, technical expertise requirements, and limitations in capturing small-scale features. There exist two main types of remote sensing classified according to the source of signal they use to explore the object, active vs. passive. Making NASA's free and open Earth science data interactive, interoperable, and accessible for research and societal benefit both today and tomorrow. LiDAR, a remote sensing technique, captures point cloud data, which was previously difficult to analyse. Human errors may occur during the analysing process. At this level of detail, distinctions can be made between rock and mineral types, vegetation types, and other features. - REMOTE SENSING DATA: APPLICATIONS AND BENEFITS - GovInfo True- or natural-color images are created using band combinations that replicatewhat we would see with our own eyes if looking down from space. Remote sensing can generate large amounts of data, which can be challenging to store, manage, and analyze, requiring specialized hardware and software, affecting its accessibility and usefulness in some applications. These two forms of data are utilized to characterize the structure of the vegetation. Remote sensing equipment must be calibrated before use in order to acquire reliable measurements. (PDF) Advantages and Limitations in using Active Remote Sensing csee necta questions Remote sensing data can be complex and challenging to process, requiring specialized tools and software, which can limit its accessibility to non-experts. A variety of lidar systems have been created, but the majority of them can capture the first and last returns of the light pulse. In other words, it is the process of identifying and assessing an object's or phenomenon's qualities from a distance. Electromagnetic energy, produced by the vibration of charged particles, travels in the form of waves through the atmosphere and the vacuum of space. chemistry The high cost may limit its use in some applications, particularly in developing countries. The technology can help in assessing the impact of human activities on natural resources, identifying areas of conservation, and supporting sustainable resource management. Remote sensing can provide valuable data for monitoring crop growth and predicting yields, making it useful for agricultural management and planning. Remote sensing provides data in real-time or near-real-time, enabling quick decision-making and response during emergency situations. The information collected through remote sensing can be used to study and monitor the Earths surface, atmosphere, and oceans, among other things. Very short high energy waves x-ray (measured in um). Some examples are: Some specific uses of remotely sensed images of the Earth include: The Landsat 8 and Landsat 9 satellites orbit the Earth at an altitude of 705 kilometers (438 miles) in a 185-kilometer (115-mile) swath, moving from north to south over the sunlit side of the Earth in a sun synchronous orbit, following the World Reference System (WRS-2). For example, knowing that an area was recently burned by a wildfire can help determine why vegetation may appear different in a remotely-sensed image. Tracking the growth of a city and changes in farmland or forests over several years or decades. The basic disadvantages of remote sensing are given below: They are not direct samples of the phenomenon, so they must be calibrated against reality. Passive vs. Active Sensing - NRCan history of africa Some features, such as underground resources or deep ocean features, cannot be accurately identified using remote sensing techniques, making it difficult to gain a complete picture of certain areas. A larger area can be sensed remotely in a very easy way and the whole data can be easily processed and analysed fast by using the computer and that data is utilised for various purposes. The . Cheap and fast method of collecting data of large areas. In terms of how they interact with materials, radar systems differ from optical systems. Active sensors include different types of radio detection and ranging (radar) sensors, altimeters, and scatterometers. kcse history The angle of the sun can create shadows and distortions in remote sensing images, making it challenging to interpret some features accurately. Disadvantages of remote sensing - There are numerous advantages in remote sensing which are being harnessed by the researchers and on the other hand, there are certain disadvantages that are affiliated with the system. It may be modified by the interposing atmosphere. PRACTICAL GEOGRAPHY In India, remote sensing is widely employed for weather forecasting. There are a variety of storage options available, including Amazon Cloud and Microsoft Azure. The wider landscape view shows which parts of a county or metropolitan area are flooded and perhaps the source ofthe water. Maps or imagery can also be integrated into a geographical information system (GIS) and then each pixel can be compared with other GIS data, such as census data. Because data is examined in a lab using software, the amount of effort required in the field is reduced. The same data, on the other hand, may be utilized to study and plan new roadways. This resolution depends on the orbit, the sensors characteristics, and the swath width. Remote sensing is a quick method. Some of these advantages include: Remote sensing provides an efficient means to collect data from vast geographical areas in a short time. SUSTAINABLE TOURISM Our Nations economic security and environmental vitality rely on continuous monitoring of the Earths continents, islands, and coastal regions to record, study, and understand land change at local, regional, and global scales. why global warming = problem) Remote Sensing- Components, Types, Applications, and Advantages Passive sensors have the benefit of relying on the Sun's light to illuminate the target and hence do not require their own energy source, making them simpler equipment in general. For example, when assessing water quality, radiometric resolution is necessary to distinguish between subtle differences in ocean color.

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