Penginderaan Jauh (Part-1)

Summary

This lesson covers the concept of remote sensing in geography. It explains remote sensing as the technique of gathering information about Earth's surface without direct contact, using sensors to analyze data. The lesson details key components such as energy, atmosphere, objects, sensors, and platforms like satellites and drones. It also distinguishes between different types of images: photo and non-photo, and their various applications, including infrared, radar, and thermal imagery, used for detecting environmental changes, land analysis, and more. The video emphasizes the significance of remote sensing in environmental studies.

Takeaways

• 🌏 **Remote Sensing Definition**: Remote sensing is a technique to gather information about Earth's surface without direct contact with the subject.
• 🔍 **Components of Remote Sensing**: It involves energy, sensors, platforms (like satellites or drones), data acquisition, and data utilization.
• 🌞 **Energy Types**: Remote sensing uses natural sunlight or artificial electromagnetic waves emitted by systems like radar.
• 🛰️ **Platforms**: Sensors can be placed on various platforms such as aircraft, satellites, or even balloons.
• 📸 **Image Types**: Remote sensing images are categorized into photographic (like visible light photos) and non-photographic (like radar images).
• 🖼️ **Photographic Images**: These include color, black and white, aerial, and satellite images, and are based on the electromagnetic spectrum.
• 🌡️ **Thermal Images**: Infrared images are useful for detecting heat differences, like in agricultural areas or geothermal studies.
• 🌉 **Urban Applications**: Remote sensing is particularly useful for urban areas, helping in detecting oil spills in the ocean or identifying coastal areas.
• 🌿 **Agricultural Uses**: It can detect pests or diseases in crops by sensing the internal parts of leaves through infrared photography.
• 🌌 **Nighttime Capabilities**: Radar and microwave images can be used both during the day and at night due to their active sensing systems.
• 📈 **Data Analysis**: The data collected is used for various applications, including environmental monitoring and resource management.

Q & A

What is the definition of remote sensing?

Remote sensing is a technique that involves the acquisition of information about an area or phenomenon on the Earth's surface without physical contact with the objects under study. It involves the analysis of data collected by sensors that detect and record reflected or emitted radiation from the Earth's surface.

What are the main components involved in remote sensing?

The main components involved in remote sensing are energy, sensors, platforms (such as aircraft, drones, satellites, or balloons), and the data obtained and its usage.

What are the two types of energy commonly used in remote sensing?

The two types of energy used in remote sensing are solar radiation, which is a natural source of electromagnetic waves, and artificial radiation emitted by systems like radar, which is an active system.

How does the atmosphere affect the electromagnetic waves used in remote sensing?

The atmosphere can scatter and absorb electromagnetic waves, especially ozone layers and other particles in the air. However, certain parts of the electromagnetic spectrum can penetrate the atmosphere and reach the Earth's surface.

What are the different types of objects that can be the target of remote sensing?

Objects that can be the target of remote sensing include the atmosphere, biosphere, hydrosphere, and lithosphere.

What is the difference between photo images and non-photo images in remote sensing?

Photo images are produced by camera sensors and are similar to what the human eye sees, while non-photo images are produced by sensors other than cameras and are based on scanning or other detection methods.

What are the various types of photo images based on the electromagnetic spectrum?

Types of photo images based on the electromagnetic spectrum include panchromatic (black and white), color infrared, true color, false color, and multispectral images.

How are photo images categorized based on color?

Photo images can be categorized into true color images, which display colors as seen by the human eye, and false color images, where colors have been altered to highlight specific features.

What are the different camera orientations used in photo images?

Photo images can be taken with cameras that are vertical (nadir), oblique, or highly oblique, depending on the angle at which the image is captured.

What are the platforms used for capturing photo images?

Photo images can be captured from various platforms such as aerial photography using aircraft, or satellite photography using satellites.

What are the two main types of non-photo images based on the electromagnetic spectrum?

The two main types of non-photo images are thermal infrared images, which are based on temperature differences, and radar or microwave images, which use active systems to emit and receive signals.

What are the advantages of radar or microwave images in remote sensing?

Radar and microwave images have the advantage of being able to penetrate clouds and darkness, making them useful for day and night observations.