去型号化接收机地面环境模拟试验充分性验证

为考察针对去型号化接收机的地面各项环境模拟试验是否能充分有效验证在轨工作环境，利用高灵敏度接收机对噪声的敏感特性，选取通道AGC作为环境模拟试验充分性验证参数；根据多台去型号化接收机的地面试验数据，分析多批次接收机的AGC参数一致性，得到去型号化接收机通道参数差异很小的结论；在此基础上，通过对多台高灵敏度接收机在轨AGC数据与地面环境试验AGC数据的比对，明确了由环境差异导致的AGC数值差异范围，可以为后续产品的地面环境试验和在轨飞行提供参考。对多台接收机在轨飞行接收机通道底噪变小的现象进行分析，得到地面环境试验模拟的电磁环境条件比空间电磁环境更恶劣的结论。

Verification of the adequacy of ground environmental simulation test for de-mission receiver

To investigate whether the ground environmental simulation test of de-mission receivers can fully and effectively verify the in-orbit working environment, channel AGC was selected as the adequacy verification parameter of environmental simulation tests by taking advantage of the sensitivity to noise of the high-sensitivity receiver. According to the ground test data of multiple de-mission receivers in environmental tests, the consistency of AGC parameters of multiple batches' receivers is analyzed. It is concluded that the channel parameter differences of de-mission receivers are very small. On this basis, by comparing the in-orbit AGC data with the ground environmental test of multiple high-sensitivity receivers, the range of AGC numerical differences caused by environmental differences was defined, which could provide reference for the ground environmental test and in-orbit flight of subsequent products. Based on the analysis on the reduced channel bottom noise of multiple receivers during in-orbit flight, it is concluded that the ground simulated electromagnetic environment is worse than that in space.