Remote sensing

The process of detecting and monitoring physical characteristics of the Earth from a distance, using satellite and aerial imagery and other data sources.

What is the definition of remote sensing?

- "Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation."

Which fields commonly use remote sensing?

- "Remote sensing is used in numerous fields, including geophysics, geography, land surveying, and most Earth science disciplines."

What are some examples of Earth science disciplines that utilize remote sensing?

- "Exploration geophysics, hydrology, ecology, meteorology, oceanography, glaciology, geology"

Are there any non-scientific applications of remote sensing?

- "It also has military, intelligence, commercial, economic, planning, and humanitarian applications, among others."

How is remote sensing generally achieved?

- "The term remote sensing generally refers to the use of satellite- or aircraft-based sensor technologies to detect and classify objects on Earth."

What does remote sensing include the study of?

- "It includes the surface and the atmosphere and oceans, based on propagated signals."

What are active remote sensing and passive remote sensing?

- "Active remote sensing is when a signal is emitted by a satellite or aircraft to the object and its reflection detected by the sensor." - "Passive remote sensing is when the reflection of sunlight is detected by the sensor."

Can remote sensing be used to detect and classify objects on other planets?

- "The term is applied especially to acquiring information about Earth and other planets."

How is remote sensing typically conducted in regards to Earth observation?

- "It includes the surface and the atmosphere and oceans, based on propagated signals (e.g. electromagnetic radiation)."

What are the two main categories of remote sensing techniques?

- "It may be split into 'active' remote sensing and 'passive' remote sensing."

What is the primary difference between active and passive remote sensing?

- "Active remote sensing is when a signal is emitted by a satellite or aircraft to the object and its reflection detected by the sensor." - "Passive remote sensing is when the reflection of sunlight is detected by the sensor."

Are there any specific technologies mentioned that can be used for remote sensing?

- "The term remote sensing generally refers to the use of satellite- or aircraft-based sensor technologies to detect and classify objects on Earth."

What are the sources of signals used in remote sensing?

- "It includes the surface and the atmosphere and oceans, based on propagated signals (e.g. electromagnetic radiation)."

Can you provide some fields that benefit from active remote sensing?

- "Exploration geophysics, hydrology, ecology, meteorology, oceanography, glaciology, geology"

What are some applications of remote sensing besides scientific research?

- "It also has military, intelligence, commercial, economic, planning, and humanitarian applications, among others."

What does in situ or on-site observation refer to?

- "Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation."

Is remote sensing limited to Earth studies?

- "The term is applied especially to acquiring information about Earth and other planets."

What are the fundamental principles of remote sensing?

- "Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object."

Can remote sensing be used for land surveying?

- "Remote sensing is used in numerous fields, including geophysics, geography, land surveying and most Earth science disciplines."

What are the sources of information used in remote sensing?

- "Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation."