http://dr5.lamost.org/v3/sas/fits/20141113/GAC073N23B2/spec-56975-GAC073N23B2_sp16-018.fits.gz
http://dr5.lamost.org/v3/sas/fits/20141113/GAC073N23B2/spec-56975-GAC073N23B2_sp16-018.fits.gz
http://dr5.lamost.org/v3/sas/fits/20141113/GAC073N23B2/spec-56975-GAC073N23B2_sp16-018.fits.gz