If you install CFITSIO[1], you can rebuild GDAL with FITS support. GDAL is the crazy-format swiss army knife. Some caveats[2] apply, though.
1) http://heasarc.gsfc.nasa.gov/docs/software/fitsio/fitsio.htm...
1) http://heasarc.gsfc.nasa.gov/docs/software/fitsio/fitsio.htm...
By the way, I found this wiki about processing and analyzing SECCHI’s images, if you wanted to you could presumably learn about it and start processing images on your own: http://secchi.nrl.navy.mil/wiki/pmwiki.php?n=Main.DataProces...