整星框图

飞行计算机IFC
低功耗，小于300 mW,
1 MB EDAC, 16 MB RAM, 16MB flash

电源系统


价值20000刀的三结砷化镓光电池




抹呀抹 粘呀粘    


充电控制器 效率89%


镍镉电池 4.4Ah

姿态控制

采用主动磁棒控制的姿态控制

结构

整星由6个舱段堆栈而成

通信系统框图


业余无线电转发器是该卫星的主要载荷。
上行144 MHz / 1.2 GHz，下行435 MHz / 2.4 GHz
可使用语音或PACSAT BBS模式工作。

VHF接收机


沿逆时针方向分别是：

前端滤波器及LNA - 功率分配器 - 4个VHF接收机 - 接口电路

UHF发射机及多波段接收机


蓝色的盒子是UHF功率分配器，两个银色盒子是UHF发射机。
多波段接收机在功率分配器下面，10m, 2m, 70cm and 23cm 全模式。


UHF发射机内部。1~6 W输出，步进2.5 kHz，调谐范围20 MHz

S波段发射机





激励器


功放

天线


朝天面是VHF天线 向地面四周的4根是UHF天线 中间的是L/S天线

  
L/S天线

桌面联调

在运行了7年之后，AO-51于2011年失效
-----------------------------------------------------
Breaking News: AO-51 End of Mission
The AO-51 Control Team reports AO-51 has ceased transmission and is not responding to commands. Read the latest news on the AO-51 Control Team News page.

November 29, 2011
It is with a heavy heart I report that AO-51 has ceased transmission and is not responding to commands. The last telemetry data indicated that the third of six batteries was approaching failure to short, and observations indicate the voltage from three cells is insufficient to power the UHF transmitters. The IHU may continue to be operative. Initial tests with the S band transmitter were also not positive, although more attempts are in order. We have tried leaving the satellite in an expected state where if voltages climb high enough, the 435.150 transmitter may possibly be heard.
The command team will regularly attempt communications with the satellite over the coming months (and years). There is always the possibility that a cell will open and we could once again talk to our friend while illuminated. Thanks to all who helped fund, design, build, launch, command, and operate AO-51. It's 7 year mission has been extraordinary. Please support AMSAT's Fox-1 project, and other AMSAT projects worldwide with your time and money.
For the AO-51 Command Team,
73, Drew KO4MA
AMSAT-NA VP Operations