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NeoScience
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When they say it takes about 5-6 mins to send radio signal back to earth, what kind radio signal are they talking about? Not FM/AM signal right?
waht said:NASA uses microwave C band and X band frequencies to communicate with the probes. Uplink is in C band about in 7.8 GHz range, and downlink is 8.4 GHz.
Microwaves travel a lot better in space, require less power, and more data can be sent than on lower frequency bands.
I don't remember what modulation Nasa uses, but it's probably QAM because you can cram a lot of data.
If interested, you can build your own receiver to pick up signal from Mars probes, no kidding.
http://www.uhf-satcom.com/vex/
hope that helps
The signal transmission from Mars to Earth works through the use of radio waves. NASA's Deep Space Network has three large radio antennas on Earth that are used to receive signals from spacecrafts on Mars. The spacecrafts transmit the signals to these antennas, which are then processed and decoded by scientists to receive the information.
The time it takes for a signal to travel from Mars to Earth varies depending on the distance between the two planets. On average, it takes about 20 minutes for a signal to travel from Mars to Earth. However, the exact time can range from 4 minutes (when the planets are closest) to 24 minutes (when they are farthest apart).
Various types of information can be transmitted from Mars to Earth, including images, videos, scientific data, and communication between astronauts and scientists. This information is vital for conducting research and understanding the conditions on Mars.
Yes, there are several challenges with signal transmission from Mars to Earth. The distance between the two planets can cause delays in communication, and the weak signals can be affected by interference from other objects in space. Additionally, the harsh environment on Mars can also impact the functioning of the spacecrafts and their ability to transmit signals.
Scientists use various techniques to ensure the accuracy of signals transmitted from Mars to Earth. This includes using advanced technology to receive and decode the signals, as well as conducting regular checks and calibrations to ensure the instruments are functioning properly. Additionally, multiple antennas are used to receive signals from the spacecraft, which helps to confirm the accuracy of the transmitted data.