[daip] (no subject)

[Lincoln Greenhill]

Subject: aips_gripe
{27-SEP-2001 13:50:27}
{rgalp8       UN-REGISTERED!!!!!!!}
{   24  31DEC01  DEC}
{lincoln greenhill}
{cfa}
{617 495 7194}
{I have 512 channel VLBA autocorrelation spectra.  ACFIT baseline
 solutions diverge from the data for polynomial orders >= 4.  The baselined
 spectra written out by ACFIT and displayed by POSSM exhibit sawtooth
 patterns and steeply increasing or decreasing baselines in the upper half
 of each spectrum, for all stations.
  
 High order polynomials are important options to have because the station
 Y1 at Q band (16 MHz BW) has a pseudo-sinusoidal bandpass response.
  }
{ACFIT polynomial baselines >=4 seem not to work. They are needed for Y1 @ Q band}
{greenhill at cfa.harvard.eduy}
{ }