摘要：In order to make a budget analysis of the inter-satellite link performance quickly and accurately, this study proposes an inter-satellite link budget software design plan. Based on the methods to calculate the space coordinates of two satellites to determine their inter-satellite distance, the inter-satellite microwave link budget and laser link budget method by investigating the given satellite orbit parameters, it completes the designs of the inter-satellite distance calculation module, the microwave link calculation module and the laser link calculation module in the inter-satellite link budget software and realizes the human-computer interface of the inter-satellite link budget software via the GUIDE of MATLAB. With the given GPS satellite ephemeris parameters, it makes a budget of the inter-satellite link of GPS by using this software, analyzes the relationship among the transmission power, the information rate and the antenna aperture and proves that the calculation result is correct. Since the operation of this software is quite simple, the users can calculate the transmission power, the information rate and the antenna aperture of the receiving end of the inter-satellite microwave link and laser link by using this software; therefore, it can provide an important ground for the design of the inter-satellite link.
