用太阳源法测量遥测系统的品质因数G/T

Measurement of G/T of Telemetry Systems Using Sun Source

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 measurement of the G/T of telemetry systems using sun source is introduced and a practical method of measurement is proposed. Analysis is given on parameters including sun flux,K1 gene and K2 gene and calculation method is given for engineering application. Taking a model of telemetry system as an example, test results with the sun source method and beacon tower method are compared and analyzed. Analysis of the test results shows that the repeating error of G/T measured with the sun source method is less than 0.4 dB and the difference from that of the beacon tower method is smaller than 0.6 dB. Therefore, the sun source method is theoretically correct and feasible and can be widely used in test of telemetry systems.