http://dr5.lamost.org/v3/sas/fits/20161104/GAC052N20B1/spec-57697-GAC052N20B1_sp03-124.fits.gz
http://dr5.lamost.org/v3/sas/fits/20161104/GAC052N20B1/spec-57697-GAC052N20B1_sp03-124.fits.gz
http://dr5.lamost.org/v3/sas/fits/20161104/GAC052N20B1/spec-57697-GAC052N20B1_sp03-124.fits.gz