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01525nam a22003617a 4500 001 616A2DB22AF411DEB9750807A8D7520A 005 200904162106.0 008 950713s1994 cau b f000 0 eng d 035 $a (OCoLC)32812149 040 $a GPO $c GPO $d SILO $d SILO 074 $a 0830-H-14 (MF) 086 0 $a NAS 1.26:197338 100 1 $a Estefan, A. J. 245 1 $a A comparative survey of current and proposed tropospheric refraction-delay models for DSN radio metric data calibration $h [microform] / $c J.A. Estefan, O.J. Sovers. 260 $a [Springfield, Va. : $b National Technical Information Service, distributor, $a [Springfield, Va. : $b National Technical Information Service, distributor, $c 1995] 300 $a 1 v. 440 0 $a [NASA contractor report] ; $v NASA CR-197338 500 $a Distributed to depository libraries in microfiche. 500 $a Shipping list no.: 95-0479-M. 533 $a Microfiche. $b [Washington, D.C. : $c National Aeronautics and Space Administration, $d 1995] $e 1 microfiche. 650 7 $a Atmospheric correction. $2 nasat 650 7 $a Calibrating. $2 nasat 650 7 $a Deep Space Network. $2 nasat 650 7 $a Orbit calculation. $2 nasat 650 7 $a Troposphere. $2 nasat 650 7 $a Zenith. $2 nasat 700 1 $a Sovers, O. J. 710 2 $a Jet Propulsion Laboratory (U.S.) 939 $a 3493497 941 $a 2 952 $l OVUX522 $d 20180203033709.0 952 $l USUX851 $d 20160819031429.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=616A2DB22AF411DEB9750807A8D7520AInitiate Another SILO Locator Search