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阐述利用太阳源法测量遥测系统品质因数G/T的原理,提出可用于工程实际的实现方法,重点对太阳流量密度、K1因子、K2因子等参数进行分析,给出工程应用计算方法。最后,以某遥测系统为例,给出了采用太阳源法和信标塔法的测量值,并对测试结果进行比对分析。实测结果分析表明,太阳源法测得的G/T重复测试精度小于0.4 dB,与信标塔法测试结果相差小于0.6 dB。因此,太阳源法合理可行,可广泛应用于遥测系统指标测试。
The principle of measuring the quality factor G / T of telemetering system by using solar source method is expounded. The realization method which can be used in engineering practice is put forward. Parameters such as solar flux density, K1 factor and K2 factor are analyzed emphatically. The engineering application calculation method is given. Finally, taking a telemetry system as an example, the measured values of the solar source method and the beacon tower method are given, and the test results are compared and analyzed. The measured results show that the G / T repeatability measured by the solar source method is less than 0.4 dB, which is less than 0.6 dB compared with the beacon method. Therefore, the solar source method is reasonable and feasible, which can be widely used in the telemetry system index testing.