000			00843nam a22001937a 4500
040			_cIIT Kanpur
041			_aeng
082			_aNASA _bTN D-1471
100			_aVonbun, F. O.
245			_aTracking systems, their mathematical models and their errors [NASA TN D-1471] _bpart 1 : theory _cby F. O. Vonbun and W. D. Kahn
260			_aWashington, D.C. _bNational Aeronautics and Space Administration [NASA] _c1962
300			_aiii, 46p
440			_aNational Aeronautics and Space Administration [NASA]
500			_aNASA TN D-1472 : Earth-reflected solar radiation incident upon spherical satellites in general elliptical orbits/ by F. G. Cunningham
650			_aEarth-reflected solar radiation incident upon spherical satellites in general elliptical orbits
700			_aKahn, W. D.
700			_aCunningham, F. G.
942			_cTR
999			_c564068 _d564068