| 摘要 |
PURPOSE:To make the standard noise source of each channel unnecessary and to reduce the weight, dimensions and the power comsumption by using a multichannel comparison noise source as a high temperature-side correcting source and sharing this noise source among individual channels. CONSTITUTION:An observation signal is received by an antenna 1 mounted on an artificial satellite of the like and is supplied to plural switches 7 through a demultiplexer 3. A low temperature-side correcting signal from a radiation cooling terminal 11 covered with a thermal insulator 12 is supplied to plural switches 9 through a demultiplexer 4. The high temperature-side correcting signal from a multichannel comparison noise source 13 is supplied to plural switches 8 and 9 through a demultiplexer 14. The reception signal of the antenna 1 and high temperature-side or the low temperature-side correcting signal are switched by switches 7 and the reception signal or the low temperature-side correcting signal and the high temperature-side correcting signal are switched by switches 8 to introduce the observation signal to receivers 10. |
