A Supplementary Antenna Alignment Method Based on Terahertz Communication between LEO-LEO

The space application of terahertz wave is focused on the communication in the Low orbit satellite (LEO) inter-satellite links. Two small satellites do not have antenna servo systems, the optimum alignment state of the antenna is determined by fine-tuning the satellite's posture and supplementing it with software. The satellite's fine-tuning posture uses the “+” scanning mode. The test data performs a series of operations (such as filtering, fast Fourier transform, down-sampling, etc) on the ground and the satellite. The receiving satellite processes the data and loads the time information into frames for downloading, matches the remote control and telemetry information downloaded to the ground, finds out the corresponding two-star attitude of the strongest signal point, passes this attitude information to the satellite control center, adjusts the satellite control center to the best attitude of the satellite, and then switches the terahertz load to the normal communication state, completes one-way information transmission of the terahertz load between the two satellites.