Changeset 548
- Timestamp:
- 03/10/05 07:48:38 (20 years ago)
- File:
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- 1 edited
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trunk/doc/cookbook.tex
r546 r548 681 681 \cmd{order} is the polynomial order for the fit. \cmd{threshold} is 682 682 the SNR threshold to use to deliminate line emission from 683 signal. Making this too small or too large will result in a poor fit, 684 but generally the value is not critical. 683 signal. Generally the value of threshold is not too critical, however 684 making this too large will compromise the fit (as it will include 685 strong line features) and making it too small will mean it cannot find 686 enough line free channels. 687 685 688 686 689 Other examples: … … 1180 1183 To plot Stokes values, the plotter \cmd{set\_cursor} function should 1181 1184 be called first using the \cmd{pol} argument. The values which can be 1182 plotted include a selection of [I,Q,U,V], [I, Plinear, Pangle, V], or1183 [ XX, YY, Real(XY), Imaginary(XY)]. (Plinear and Pangle are the1184 percentage and position angle of linear polarisation). Conversion to 1185 circular polarisations are currently not available.1185 plotted include a selection of [I,Q,U,V], [I, Plinear, Pangle, V], 1186 [RR, LL] or [XX, YY, Real(XY), Imaginary(XY)]. (Plinear and Pangle are 1187 the percentage and position angle of linear polarisation). Conversion 1188 to circular polarisations are currently not available. 1186 1189 1187 1190 Example: … … 1189 1192 \begin{verbatim} 1190 1193 ASAP> plotter.set_cursor(pol=[``I'',''Q''] 1194 ASAP> plotter.set_cursor(pol=[``RR'',''LL''] 1191 1195 ASAP> plotter.set_cursor(pol=[``XX'',''YY''] 1192 1196 ASAP> plotter.set_cursor(pol=[``I'',''Plinear''] … … 1261 1265 smooth - return the spectrally smoothed scan 1262 1266 poly_baseline - fit a polynomial baseline to all Beams/IFs/Pols 1267 auto_poly_baseline - automatically fit a polynomial baseline 1263 1268 gain_el - apply gain-elevation correction 1264 1269 opacity - apply opacity correction
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