#header{background:url(/assets/spark/2023_ieee_aerospace_conference/sprite-5b2734a5ebf769495301ba4ed54405b9527c6d1a793941df10e41dd024b2504b.png) repeat-x}#logo{background:url(/assets/spark/2023_ieee_aerospace_conference/logo-b4ec068a89af095825454ed41572912c7976d32cdc6d05c11b1a54ad69191e1c.png) 0 0 no-repeat;width:436px;height:32px;margin-top:-3px}#nav{background:url(/assets/spark/2023_ieee_aerospace_conference/sprite-5b2734a5ebf769495301ba4ed54405b9527c6d1a793941df10e41dd024b2504b.png) center -48px repeat-x}