Method for extracting fixed star image coordinates in real time based on field programmable gate array (FPGA)
A technology of star image coordinates and stars, which is applied in the field of real-time extraction of star image coordinates, which can solve the problems that cannot meet the high dynamic and high precision mode of star sensors.
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[0044] We choose a certain type of satellite star sensor for testing. The main parameters of the star sensor are as follows:
[0045] Field of view: 14×14
[0046] Star array: 1024×1024
[0047] Detection magnitude: 6th;
[0048] Star sensor FPGA model: ALTERA CycloneII EP2C8Q208I8
[0049] The main characteristic parameters of EP2C8Q208I8:
[0050] Logical unit: 8256
[0051] RAM: 165888 bits
[0052] PLL: 2
[0053] The maximum number of I / O used: 182
[0054] Star sensor FPGA operating frequency: input FPGA crystal oscillator frequency 20MHz, the operating frequency of the process of extracting star image coordinates after using phase-locked loop is 80MHz;
[0055] Star sensor processor operating frequency: 20MHz.
[0056] The method of extracting star image coordinates by software is compared with the method of real-time extraction of star image coordinates by FPGA, and the star sensor's star image coordinate extraction accuracy, data update cycle and other main i...
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