Input Cards

RF_METHOD $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{adaptive}} \ensuremath{\:\vert\:}porbits}}}}$
$\parbox{\MY}{Method selector for range filtering. Either adaptive (recommended) or based on the precise orbits.}$



RF_FFTLENGTH $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{64}}}}}}$
$\parbox{\MY}{For method porbits and adaptive. For method porbits: le... ... of window for adaptive method. A peak is estimated for parts of this length.}$



RF_OVERLAP $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{0}}}}}}$
$\parbox{\MY}{For method adaptive. Overlap between input buffers in range direction. }$



RF_HAMMING $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{0.75}}}}}}$
$\parbox{\MY}{For method porbits and adaptive. Weight for hamming filter (1 is rect).}$



RF_SLOPE $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{0}}}}}}$
$\parbox{\MY}{For method porbits. Terrain slope in degrees. Positive ... ...s towards radar. A slope equal to the viewing angle implies total filtering.}$



RF_NLMEAN $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{15}}}}}}$
$\parbox{\MY}{For method adaptive. Take (walking) mean over RF\_NLMEA... ...o reduce noise for peak estimation. Has to be odd. Compare with periodogram.}$



RF_THRESHOLD $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{5}}}}}}$
$\parbox{\MY}{For method adaptive. Threshold on SNR of peak estimation to perform range filtering.}$



RF_OVERSAMPLE $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{2}}}}}}$
$\parbox{\MY}{For method adaptive. Oversample master and slave with t... ...etween shifts that can be estimated is in that case halfed (fixed FFTLENGTH).}$



RF_WEIGHTCORR $\parbox{0.75\linewidth}{ {\textrm{\it{\textnormal{[} {ON \ensuremath{\:\vert\:}{\underline{OFF}}} \textnormal{]}}}}}$
$\parbox{\MY}{For method adaptive. In peak estimation, weight values ... ...ns, the shape of the range spectrum). Effect of this card may be neglectable.}$



RF_OUT_MASTER $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{master.rfilter}}}}}}$
$\parbox{\MY}{Output data file name of master.}$



RF_OUT_SLAVE $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{slave.rfilter}}}}}}$
$\parbox{\MY}{Output data file name of slave.}$



RF_OUT_FORMAT $\parbox{0.75\linewidth}{ {\textrm{\it{{\underline{cr4}} \ensuremath{\:\vert\:}ci2}}}}$
$\parbox{\MY}{Output data format for master and slave file.}$

Example input:

  c
  c
 comment   ___ ADAPTIVE RANGE FILTERING ___
  c
 RF_METHOD       adaptive
 RF_FFTLENGTH    128                             // 2500 m
 RF_NLMEAN       15                              // odd
 RF_THRESHOLD    5                               // SNR
 RF_HAMMING      0.75                            // alpha
  RF_OVERSAMPLE   4
 RF_WEIGHTCORR   OFF
 RF_OUT_MASTER   Outdata/3397.rfilter
 RF_OUT_SLAVE    Outdata/23070.rfilter
 RF_OUT_FORMAT   ci2