Understanding Remote Sensing Material According to Experts

The definition of remote sensing or commonly abbreviated as sense is a measurement or data acquisition an object or phenomenon by a device that is not physically in contact with the object or from a distance far.

Examples can be through spacecraft, planes, satellites, and ships.

In addition to this general understanding, there are also several definitions of remote sensing that are spoken by experts. Read more carefully - good reviews below.

Definition of Remote Sensing

The following are some other definitions of remote sensing that you need to know, including:

1. American Society of Photogrammetry

Remote sensing is an income or measurement of information from various properties of objects or phenomena with how to use a recording device that does not physically come into direct contact with objects or phenomena observed.

2. Colwell (1984)

Remote sensing is an income or measurement of data on objects on the earth's surface from satellites or other instruments that are above or far from the object being sensed.

3. Avery

The definition of remote sensing is an attempt to obtain, indicate (identify) as well as to analyze objects using sensors on the observation position of the study area.

4. Campbell

Remote sensing is a science to obtain information related to the earth's surface such as land and water from images obtained from a long distance.

5. Lillesand and Keifer (1979)

Remote sensing or also known as remote sensing is a science as well as an art to be able to obtain information related to an area, object, or phenomenon by means of data analysis obtained through a recording device (sensor) by using electromagnetic waves as a means of intermediary without touching the object to be studied.

6. Lindgren (1985)

Remote sensing is a variety of techniques developed for the acquisition and analysis of earth-related information.

7. Curran (1985)

Remote sensing is the use of electromagnetic radiation sensors to record images the earth's environment that can be interpreted so that it will produce information that will later useful.

8. Welson and Bufon

Remote sensing is a science, art and technique to get an object, area and symptoms by using tools and without direct contact with the object, area and symptoms alone.

Or it can be said that remote sensing is also a science and an art to obtain information related to objects, areas, or objects symptoms by analyzing the data obtained by using a tool without direct contact with the object, area, or symptom observed.

9. According to Geographical Studies

The definition of remote sensing according to the study of geography is contained in the book Remote Sensing: Textbook of the Geography Study Program consisting of several system components, including:

a. Power Power

Is a component that will hit the object, to then reflect or re-emit energy according to the characteristics of the object.

b. Atmosphere

The atmosphere contains many gases (O3, CO2) and water vapor (H2O) which can be used to block electromagnetic waves from reaching the earth's surface.

Part of the electromagnetic waves that can pass through the atmosphere is known as the atmospheric window.

c. Force interaction with object

Not all energy can reach the earth's surface, because the atmosphere is holding it back.

The part of the atmosphere that allows electromagnetic waves to pass through is known as the atmospheric window.

d. Sensor

The sensor appears when there is an object.

In this sensor is a recording device of electromagnetic waves which will be reflected or emitted by objects on earth.

e. Data acquisition

Each object with different characteristics will respond to the energy. So that the object can be recognized from its spectral pattern.

Data acquisition means a way to get or extract data from an image.

e. Users or humans who have roles as operators or interpreters as well as image interpreters.

Image Types and Examples

Satellite imaging or commonly referred to as space photography is an image of the earth or planet that is collected using satellite observers.

The image itself is divided into two different types, namely digital images and conventional images.

Meanwhile, when viewed from the way of data collection, the image is divided into images from the atmosphere and images from outside the atmosphere.

In its use, digital images are more popularly used because they have been supported by the latest technological developments.

The following are some examples of satellites that can produce digital images, including:

• SPOT. satellite
• Landsat. satellite
• GeoEye. Satellite
• IKONOS Satelit Satellite
• Resourcesat-1 (IRS-P6) Satellite
• Pleiades. Satellite
• Terra Aster Satellite
• ALOS. Satellite
• ERS-SAR. Satellite
• Quickbird. Satellite
• NOAA. Satellite
• Worldview. Satellite
• GMS Satellite or HIMAWARI. Satellite
• HCMM. satellite
• JERS-1. satellite
• MODIS Terra Terra-Aqua Satellite

Benefits of Remote Sensing

Sensors can be interpreted by anyone, but there are only a few sectors that use remote sensing data for specific purposes.

With the sensory system, it will be very helpful to speed up valid measurements without going down to the field.

now, the following are some of the benefits of remote sensing in various fields, including:

1. Geodesy

In the field of geodesy, remote sensing will generally be combined with Geographic Information Systems in order to produce accurate data and information.

Sensory technology in this sector is used in various surveys and has the following roles:

• Making data on the contours of the earth's surface area.
• Digital image analysis used for various purposes.
• Photogrammetry and aerial surveying.
• Development Planning.

2. Forestry

As much as 60% of the area in mainland Indonesia is forest area.

In this sector, this sensing technology will be very helpful in monitoring the forest area in Indonesia.

An example is FWI (Forest Watch Indonesia), an NGO or Forestry Non-Governmental Organization that focus on controlling forest land cover in Indonesia by using technology senses.

The following are some of the roles of remote sensing in the forestry sector, including:

• Measuring the rate of deforestation and reforestation.
• Measuring the area of ​​forest land cover.
• Measuring the potential of a production forest area.
• Analyzing forest land cover types.
• Measuring the amount of carbon stock in the forest area.

3. Regional Planning

The senses in the regional planning sector are used to find out the initial information on the area to be planned.

An example is land cover analysis to determine the right type of planning in a particular area.

4. Hydrology

Efforts to anticipate hydrometeorological natural disasters will require spatial analysis that can be obtained through sensing technology.

This one system can assist hydrological modeling at the watershed scale.

5. marine

In the marine sector, the senses are used to observe the physical sea water, salt content, ocean currents, tides sea ​​water, surface temperature, ocean waves, as well as mapping of coastal changes, abrasion, sedimentation and the like other.

6. Meteorology and Climatology

Not only on the surface of the earth, technology from remote sensing can also be used to observe various other objects in the atmosphere.

This ability is useful in meteorology and climatology for the following purposes:

• Early warning of the potential and dangers of natural disasters.
• Weather forecast.
• Analysis of cloud distribution in an area.
• Analysis of the climate of an area.