Re: FITS Export w/ Elements in V6?
- To: mathgroup at smc.vnet.net
- Subject: [mg85145] Re: FITS Export w/ Elements in V6?
- From: Frank Iannarilli <frankeye at cox.net>
- Date: Wed, 30 Jan 2008 06:06:18 -0500 (EST)
- References: <fne17r$4vi$1@smc.vnet.net>
One possibly related problem is that the current V6.0.1.0 (Win) does not successfully distinguish between a 32-bit integer and a 32-bit floating-point array type FITS file. It thinks both are Real32 (for the DataType element). My trouble was in trying to Import[] then Export[] the element set for a 32-bit integer FITS file. Upon Import[], the RawData element contains the correct data bytes (for either type), but the Data element contains an array evidently coerced by Mathematica into floating-point. Presumably some of these coercions are not valid IEEE float values, so that upon attempted Export[], Mathematica complains. I will submit a bug report to Wolfram. BTW, one can test the validity and type of FITS file with the following tools, one on-line and the other for desktop: <http://fits.gsfc.nasa.gov/fits_verify.html> <http://heasarc.gsfc.nasa.gov/docs/software/ftools/fv/>