Radio frequency communications for spacecraft are conducted between 30 MHz and 60 GHz . The lower frequency bands are typically more mature for SmallSat usage, however extensive use of these bands has led to crowding and challenges acquiring licensing.
Read moreWhy do we need frequency bands?
A frequency band may represent one communication channel or be subdivided into many . Allocation of radio frequency ranges to different uses is a major function of radio spectrum allocation.
Read moreWhy uplink and downlink frequency is different for satellite system?
It say basically the power at ground stations is more as compared to power available at satellites .So generally frequency for uplink is kept higher than the downlink. There is greater attenuation due to rain when the signal frequency is high.so downlink is also kept at lower frequency.
Read moreWhat is satellite uplink and downlink frequency?
Uplink frequency is the frequency at which, the first earth station is communicating with satellite . The satellite transponder converts this signal into another frequency and sends it down to the second earth station. This frequency is called as Downlink frequency.
Read moreWhy uplink frequency is higher in satellite communication?
In satellite communication, the uplink frequency is higher than the downlink frequency because the attenuation level increase with an increase in frequency . The power at the ground station (Base Station) is more than compared to the power available at the satellite.
Read moreWhat frequency is NASA?
The amateur radio club at NASA Johnson Space Center in Houston retransmits audio on 146.640 MHz , and the club at NASA Goddard Space Flight Center in Greenbelt, Md., retransmits audio on frequency 147.450 MHz. The signals can be received for about 25 miles.
Read moreWhat frequency does NASA use to communicate with Mars?
Most often, Mars 2020 uses its ultra-high frequency (UHF) antenna (about 400 megahertz ) to communicate with Earth through NASA’s orbiters around Mars.
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