An approach guidance method using a single onboard optical measurement

LDR 01824cam a2200277Ma 4500
001 011444337
003 MiAaHDL
005 20141009010000.0
006 m d
007 cr bn ---auaua
008 100226s1970 dcu 000 0 eng d
035 ‡asdr-uiuc6401326
035 ‡a(OCoLC)529509623
040 ‡aLHL ‡cLHL ‡dSTF
049 ‡aUIUU
086 0 ‡aNAS 1.14:D-5963
100 1 ‡aHamer, Harold A.
245 1 3 ‡aAn approach guidance method using a single onboard optical measurement / ‡cHarold A. Hamer and Katherine G. Johnson.
246 0 ‡aNASA TN D-5963
260 ‡aWashington, D.C. : ‡bNational Aeronautics and Space Administration : ‡b[For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151], ‡c1970.
300 ‡a80 p. : ‡bill.; ‡c27 cm.
490 0 ‡aNASA technical note. ‡vD-5963
520 ‡aAn empirical method has been developed for onboard guidance within the sphere of influence of a celestial body. For guidance maneuvers made at a relatively large distance from the body, only one preselected measurement from a star to the body is required. Although the method is designed to control the magnitude of the periapsis radius (or entry angle), the periapsis position and velocity automatically remain close to the nominal values. For lunar approach, error analysis with an assumed one-sigma error of 10 seconds of arc in the optical angular measurements and a one-sigma velocity-cutoff error of 0.2 m/sec has shown that perilune radius can be controlled to a one-sigma accuracy of from 7 to 13 km, depending on the time the approach guidance is performed.
538 ‡aMode of access: Internet.
650 0 ‡aTranslunar trajectories.
650 0 ‡aOnboard navigational guidance.
650 0 ‡aApproach guidance.
700 1 ‡aJohnson, Katherine G.
CID ‡a011444337
DAT 0 ‡a20101109112359.0 ‡b20141009010000.0
DAT 1 ‡a20141112165512.0 ‡b2023-03-14T18:35:48Z
DAT 2 ‡a2023-03-14T17:30:02Z ‡b2020-08-29T20:00:02Z
CAT ‡aSDR-UIUC ‡dUNKNOWN ‡lloader.pl-003-020
FMT ‡aBK
HOL ‡0sdr-uiuc6401326 ‡auiug ‡bSDR ‡cUIUC ‡puiug.30112106879247 ‡sUIU ‡16401326
974 ‡bUIU ‡cUIUC ‡d20230314 ‡sgoogle ‡uuiug.30112106879247 ‡y1970 ‡rpdus ‡qgfv