Active System (active Sensor)
Active system, also known as active sensor, is a type of sensor that emits its own energy or signal to detect and measure properties of the surrounding environment. This type of system is commonly used in space and astronautical engineering for remote sensing applications, such as radar and lidar. Active sensors provide their own source of illumination, which allows them to operate independently of external light sources and to penetrate through various materials, such as clouds, smoke, and foliage. They can also provide high-resolution images and precise measurements of distance, velocity, and other parameters. However, active systems require more power and can be more complex than passive systems, which rely on external sources of energy, such as sunlight or thermal radiation.
Your Previous Searches
Random Picks
- Bone Resorption: Bone resorption is the process by which osteoclasts break down bone tissue and release minerals, resulting in a transfer of calcium from bone tissue to the blood. This process is regulated by various hormones and cytokines, and is necessary ... Read More >>
- State Of Charge Range: State of Charge (SoC) Range refers to the percentage of available energy in a battery that is currently being used. In the context of space and astronautical engineering, SoC Range is an important parameter to monitor and control in spacecr ... Read More >>
- Temperature Fluctuations: Temperature fluctuations refer to the variations in temperature that occur in space and astronautical engineering contexts. These fluctuations can occur due to a variety of factors, including changes in solar radiation, atmospheric conditio ... Read More >>
Top News
Check out this interactive map of the early universe, considered largest ever cr...
A team of astronomers have put together the largest, most detailed map of the universe ever created – and you can explore it now....
News Source: USA Today on 2025-06-12
The Vera C. Rubin Observatory is about to totally transform astronomy...
With the ability to scan the entire southern night sky every three days, the huge Vera C. Rubin Observatory could be about to start solving the mysteries of the universe, from dark matter to Planet Ni...
News Source: New Scientist on 2025-06-12
Trump's proposed science cuts will have huge consequences...
The universe will still be there to marvel at, despite brutal cuts set to hit NASA and the National Science Foundation's budgets. But the damage to future research will be long-lasting, says Chanda Pr...
News Source: New Scientist on 2025-06-11
Starlink satellites are leaking radio signals that may ruin astronomy...
Our ability to study faint radio signals from when the first stars began to form is being threatened by SpaceX's Starlink satellites, which seem to be unintentionally leaking radio signals that overpo...
News Source: New Scientist on 2025-06-09
Asteroids around Venus pose possible 'invisible threat' to Earth: Should you be ...
A swarm of large asteroids likely lurking around Venus could one day pose an "invisible threat" to Earth if left unchecked, astronomers have warned....
News Source: USA Today on 2025-06-06