<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Dear Aips support, dear Erik, </div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>I have just updated my current AIPS version to the</div><div>latest one and run into following problem.</div><div><br></div><div>After calibration I wrote out the UV-FIts file and after some other steps </div><div>I load the data back into AIPS.</div><div><br></div><div><div>FITLD1: Task FITLD (release of 31DEC14) begins</div><div>FITLD1: PARSCD: NUMBER ERROR ON ALTRVAL</div><div>FITLD1: ERROR 1 RETURNED FROM UVFHDR</div><div>FITLD1: Purports to die of UNNATURAL causes</div><div>FITLD1: localhost 31DEC14 TST: Cpu= 0.0 Real= 0</div><div>Traceback (most recent call last):</div></div><div><br></div><div><br></div><div>Now if I look into the header of fits file </div><div><br></div><div><div>ALTRVAL = -Infinity /Altenate FREQ/VEL ref value </div><div><br></div><div>Now trying to change the value via pyfits results into an error</div><div>Card 'ALTRVAL' is not FITS standard (invalid value string: -Infinity </div><div><br></div><div>If have changed the value with a normal editor (vi) to 0, this helped to circumvent that problem,</div><div>to load the data int AIPS again.</div><div><br></div><div>I have two questions:</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>setting the ALTRVAL = 0 would that cause any problem?</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Would it be possible to add instead of -Infinity maybe 0 or another value that will switch off the use of ALTRVAL?</div></div><div><br></div><div><br></div><div>Any advice is highly appreciated, thanks in advance and greetings from Bonn</div><div><br></div><div>Hans</div><div><br></div><br><div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>--------------------------------------------------------<br>Hans-Rainer Kloeckner<br>--------------------------------------------------------<br><div>Max-Planck-Institut fuer Radioastronomie<br>Auf dem Huegel 69<br>53121 Bonn<br>Germany<br>+49 (0)228 525-314<br><a href="mailto:hrk@mpifr-bonn.mpg.de">hrk@mpifr-bonn.mpg.de</a><br>--------------------------------------------------------</div></div><div><br></div></div></div></div><br class="Apple-interchange-newline">
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