“SZ-4”飞船高度计天线指向角反演方法
A retrieval method of antenna pointing information of “SZ-4” space-borne altimeter
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摘要: 利用2003年2月7到8日“SZ-4”高度计的波形数据,经过波形数据预处理(波形为1 s的平均、去除热噪声和波形归一化)后,对海面回波波形后沿进行拟合,计算出了高度计天线的指向角,结果表明,“SZ-4”飞船高度计天线的指向角几乎全部在0.024°以内,天线指向在计算时间内比较稳定.
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关键词:
- “SZ-4”飞船高度计 /
- 天线指向角 /
- 反演方法 /
- 波形
Abstract: Using "SZ-4" space-borne altimeter waveforms data on 7 to 8 February 2003,raw data are preprocessed,which include waveforms' 1 s average,thermal noise eliminatim and normalization.Then the trailing edge of the sea surface return wave waveforms is fitted with a fitting method to calculate the pointing angle of altimeter antenna.These results show that "SZ-4" space-borne altimeter pointing angle of altimeter antenna is almost wholly less than 0.024°,antenna pointing is very stable within computing time.-
Key words:
- “SZ-4” space-borne altimeter /
- antenna pointing angle /
- retrieval method /
- waveform
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