Thank you for your interest in eSAR processor.
ERS SAR raw data is 5bit. i.e. from 0 to 31 as integer. However, the actual IQ values are centred at 0, ranging from -15.5 to 15.5 using all quadrants of complex domain. This is when the nominal_mean_I or nominal_mean_Q are 15.5. DC_bias values correct systematic deviation of centre value from 0.
Strange letters appearing on this eSAR Forum is all korean. You can neglect them. cheers, Hoonyol
¦[nauman´Ô²²¼ ³²±ä ³»¿ë] ¦sir! ¦what is the purpose of nominal mean and dc biar while loading the data? ¦ ¦
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