REMOTE SENSING PLATFORMS ✈️🛸🌌🚀 AND TYPES OF SENSORS 🕹️🎮📺📼💡

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​https://youtu.be/Qd2GFDrz4Kc

Remote sensing platforms
Platforms
Platforms refer to the structures or vehicles on
which remote sensing instruments are mounted.
The platform on which a particular sensor is housed
determines a number of attributes, which may dictate the use of
particular sensors.
The platform provides support for the sensor and
platforms can be divided into three types:
1. Ground based
2. Airborne
3. Spaceborne
The distance between the platform and the target
being imaged depends upon the spatial resolution required (how much
detail is needed?), the area coverage required (how big is the area
of interest?) and the purpose for which the data are required.
Spaceborne platforms in the form of satellites are
the most common remote sensing platforms and further attention is
therefore given to the different types of satellite configuration,
particularly in so far as this affects the detail and coverage of
the imagery obtained.
​Ground-based platforms
Ground-based platforms are mainly used to collect
spectral information.
They provide a basis for preliminary investigation
and concept understanding.
They are also used for the calibration and
validation of airborne and spaceborne data.
Airborne sensors
Airborne sensor platforms may be a kite, helicopter
or aircraft.
Fixed wing aircraft are the platform of choice for
most applications as they provide a stable platform for small-area,
high resolution surveys.
Airborne platforms can also serve to test
spaceborne sensors before they are placed into orbit.
Spaceborne platforms
​Satellites provide the spaceborne platform for
sensors and are indeed the most common remote sensing platform.
The path followed by a satellite is referred to as
its orbit.
Compared with manned spacecraft satellites offer
many advantages. For example, no life support systems are required,
making them cheaper to build and launch.
Satellites can offer very long periods of
operation, using repetitive orbits and providing global
coverage.
Sensors
There are several types of sensors that are used in
remote sensing satellites.
These sensors vary according to the purposes for
which they are used. …
The Thematic Mapper. …
The Microwave Radiometer. …
The Synthetic Aperture Radar. …
The Panchromatic Camera.
Remote sensing instruments are of two primary
types:
Active sensors
​Active sensors, provide their own source of energy
to illuminate the objects they observe.
An active sensor emits radiation in the direction
of the target to be investigated.
The sensor then detects and measures the radiation
that is reflected or backscattered from the target.
Passive sensors
Passive sensors, on the other hand, detect natural
energy (radiation) that is emitted or reflected by the object or
scene being observed.
Reflected sunlight is the most common source of
radiation measured by passive sensors.
Thank you

Видео REMOTE SENSING PLATFORMS ✈️🛸🌌🚀 AND TYPES OF SENSORS 🕹️🎮📺📼💡 канала Sagar Mahalle