Remote Sensing And Environment
Remote sensing is the process of obtaining information from an object by measuring electromagnetic waves. It is often used in a variety of applications. In the context of environmental monitoring, remote sensing is a useful technique for collecting data in difficult or inaccessible areas, as well as for monitoring the behavior of a particular plant or vegetation.
Historically, the most common form of remote sensing is aerial photography. This method allows for great spatial resolution. Aerial photos are typically used for mapping vegetation classes, determining tree heights, and identifying individual tree species. The technology has evolved to include more sophisticated techniques. These imaging methods also allow for real-time monitoring.
Satellites have played an important role in the advancement of remote sensing. They are used to monitor the climate system, collect climate change-related data, and provide rapid updates. More satellites are being launched every year. As they are increasingly used, a variety of new scientific investigations are underway.
Other forms of remote sensing are also being developed. Active and passive remote sensing are two main types. Generally speaking, active remote sensing refers to sensors that directly emit signals, while passive ones respond to external stimuli. Some observation satellites are specifically designed to provide remote sensing services.
Ground-Based Platforms: Remote Sensing And The Environment
Ground-based platforms are also used for remote sensing. Examples of common ground-based platforms are cranes, towers, tripods, and hand-held devices. Most of these devices are used for research purposes. However, there are also common platforms for field applications.
Among the many types of field instruments, a photographic camera is the most common. In addition, a range of other tools are available. Camera systems are generally designed to resemble the human eye. For instance, the iris controls the amount of light that hits the film. Also, the shutter controls the length of time the light can strike the film.
Several other fields of remote sensing use spectral signatures. These spectral signatures facilitate target discrimination. Another type of field instrument is a radiometer. Many ground-based instruments measure the quality of light from the sun. While a ground-based device is generally less expensive than a satellite-based instrument, the limited spatial coverage may be problematic.
Another major type of field instrument is a geographic information system. This type of monitoring is used for natural resources management and land use planning. Geospatial data is used for education and research. Drones are also used for real-time monitoring. With their flexibility, they add a dimension to environmental monitoring that is otherwise lacking.
The potential for remote sensing is immense. Currently, there are about 100 remote-sensing satellites in space. There are more satellites in development and more in construction, so the number of data opportunities is increasing. Consequently, more and more applications will be developed and implemented in the future.
