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China BeiDou Radionavigation Satellite System
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BeiDou is a Chinese radionavigation satellite system similar in function to GPS. "BeiDou" roughly translates to "compass" in English.
As of early 2024, the constellation consists of 44 satellites:
- 7 GEO (38,300 km)
- 27 MEO (21,500 km; 55 deg inclination)
- 10 inclined GSO (IGSO)
The minimum signal strength on the ground for all four signals is -163 dBW.
According to Penn State:
"The future BeiDou is expected to support two different kind of general services: Radio Determination Satellite Service (RDSS) and Radio Navigation Satellite Service (RNSS). The RDSS will include a short message communication (guaranteeing backward compatibility with BeiDou-1). A satellite-based 2-way short message service in China and the surrounding areas (75 -135 ° E 10 -55° N) with a power of less than 3W and a capacity of more than 10 million messages/hr using 3 GEO satellites. The RDSS Characteristics will include a global message service using inter-satellite crosslinks with 10W of power and a capacity of 200,000 messages/hr using 14 MEO satellites. The Radio Navigation Satellite Service (RNSS) is very similar to that provided by GPS and Galileo and is designed to achieve a similar performance."
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Frequencies |
| Frequency | Bandwidth | Use | Service | Table |
| 1207.14 MHz | 24 MHz | BeiDou B2 signal | Radionavigation-satellite | - |
| 1268.52 MHz | 24 MHz | BeiDou B3 signal | Radionavigation-satellite | - |
| 1561.098 MHz | 4.092 MHz | BeiDou B1 signal | Radionavigation-satellite | - |
| 1589.742 MHz | 4.092 MHz | BeiDou B1-2 signal | Radionavigation-satellite | - |
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