When making a second contact on SO-50, the signal was weak. What could be causing this? I would appreciate any advice from experienced operators.

BG5JKT

第一次是在山上接收 ISS 的 SSTV，用的 UVK6 和 U2V2 八木，软件用的 LOOK4SAT，接收还比较成功，很高兴。结果第二次进行打星翻车了，还是刚才的配置，还提前输入了五个多普勒信道切换。目标卫星是 SO-50，刚入境只能听见规律地断续信号，本以为只是信号不好，结果到顶时（大约 60°）能听见话音了，但还是有一卡一卡地卡顿，导致只听见信号 59，但完全抄收不了呼号 “马什么梅？”“什么冬梅？” 这是为什么呢？新人 HAM 刚入坑不久，在当地的中继上通联倒是乐趣满满，到现在通联日志写了三四页，和 27 个 HAM 建立了通联，很开心，也在思考未来更换什么样的设备，采用什么玩法。这几天本想通过卫星来连上 100 周年纪念呼号，还在尝试中。。。。。

BH6QCE

BG5JKT The B100IARU should work well on ISS; it's a good choice.

BG5JKT

I heard that the SO50 satellites were successfully connected a few days ago, but I'm not sure if there was something wrong on my end.

Liridice

Rotating antenna, attempting to engage with polarization.

BG5JKT

I suddenly realized this and tried turning it faster, but maybe I wasn't turning quickly enough. (´ᗜ `*)

Hydroxide

BH6QCE
Based on my experience with FM star, ISS was the most crowded and chaotic. Signals from SO50 and AO91 were sometimes difficult to read accurately, while overall performance of AO123 and SO124 was good.
Of course, if I had the ability to do linear star CW/FT4, that would be even better… The RS-44 FT4 really works well, but the barrier to entry for full UV mode equipment is still relatively high.

BG5JKT

BH6QCE Okay, the ISS should be better, but it won't pass at a very high angle frequently.

BG5JKT

BH6QCE Great, Kelsi!

BG2GFC

首先新手尝试SO-50确实有点冒进
U2V2天线对于接收50这样的低功率卫星已经开始显得力不从心了
K6如果刷了固件那么会削减灵敏度五信道法没有问题很不错
主要的问题是SO-50这颗卫星的老问题（极化）
卫星极化分三种线极化圆极化椭圆极化
SO-50卫星在轨道上处于自旋，并且其年老体衰（22年）
需要旋转极化抓下行信号信号的失调会导致10-20DB不等的损失

新手可以尝试ISS和ASRTU这类新发射的和发射功率较大抑或是信号很好的业余卫星
不要担心B100IARU 他听见你会呼叫您的

BG5JKT

BG2GFC Thank you, Mr. GFC, for clarifying this. I now understand.

BG5JKT

Hydroxide Thank you for sharing. That means I can try A0123 and S0124 more often. As for CW, there's no way to use it without the power supply; otherwise, it won't work.

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