Solar radiation error is the main source of observation error for near space rocket sounding instruments at altitudes of 30-60 km.To reduce the solar radiation errors,a circular silver-plated aluminum plate radiation shield was designed.First,computational fluid dynamics was used to calculate the solar radiation error by the probe with and without radiation shield at different altitudes,air velocities,and solar elevation angle.The data were compared and analyzed.Afterwards,the support vector machine algorithm was used to train the simulation results and obtain the corresponding prediction model.It can be concluded that the root mean square between the predicted and simulated values is 0.036 K,and the absolute value of the difference between the predicted and simulated values is less than 0.08 K.Finally,a low-pressure wind tunnel and a solar simulator were used as experimental platforms to simulate the high-altitude environment,and the experimental results were compared with the algorithm prediction results.The average measurement error between the experimental and predicted values is 0.096 K with root mean square error of 0.097 K.
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