| 摘要 |
<p>PURPOSE:To realize the high space resolution by using a miniature antenna by measuring the variation of an output of an interferometer which follows a movement of a radio wave radiometer extending over a wide moving range, and opening and synthesizing an obtained coherence function in the moving direction. CONSTITUTION:A circuit of a radio wave radiometer SR loaded on an artificial satellite is a radio wave interferometer consisting of antennas A1, A2 and a signal correlator C. An output XO of the correlator C is obtained as a signal correlation output of the antennas A1, A2 for receiving a noise radiation radio wave R radiated from the ground surface T. This output XO is varied while the radiometer SR is moving from a position P1 (position in which the surface T is on a production of a base line L) to a position P2 (position being symmetrical to the position P1), therefore, it is recorded as a time function (coherence function), and also, by performing the opening/synthesis processing, a reproducing image of the surface T is obtained. When a receiving band of the radiometer SR is wide, a time difference of the signal for reaching the antennas A1, A2 is adjusted by adding a time delay tau to the antenna A2 of the lower side. By a movement of a satellite, a continuous reproducing image of the surface T can be obtained.</p> |
