+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year + Subject + Availability Options Selected Navigations: Author > Niedfeldt, B. G. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 5 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Summary of Apollo guidance and navigation error analysis Author(s): Corey, D. A.; Englar, T. S.; Niedfeldt, B. G.; Sperry, R. V. Abstract: No Abstract Available NASA Center: NASA (non Center Specific) Publication Year: 1966 Added to NTRS: 2007-12-28 Accession Number: 77N78376; Document ID: 19770077156; Report Number: NASA-CR-153010, TR-66-310-4 A simple method for approximating quantiles of the random variable x squared sub 1 plus x squared sub 2 plus x squared sub 3 Author(s): Bixhorn, H. J.; Niedfeldt, B. G. Abstract: Simple method for approximating quantiles of random variables NASA Center: NASA (non Center Specific) Publication Year: 1968 Added to NTRS: 2005-11-09 Accession Number: 79N73187; Document ID: 19790073679; Report Number: NASA-CR-97705 Midcourse correction penalties due to expected translunar injection deviations as a function of earth parking orbit stay time Author(s): Niedfeldt, B. G. Abstract: Determination of translunar midcourse correction penalties as function of earth parking orbit stay time for Apollo lunar type missions NASA Center: NASA (non Center Specific) Publication Year: 1967 Added to NTRS: 2005-10-31 Accession Number: 79N71988; Document ID: 19790072480; Report Number: NASA-CR-88182, TM-67-2012-4 Midcourse correction penalties due to expected translunar injection deviations Author(s): Corey, D. A.; Niedfeldt, B. G. Abstract: Effects of launch site position, propulsion and sensing systems, and venting performance on midcourse correction of Apollo lunar trajectory NASA Center: NASA (non Center Specific) Publication Year: 1967 Added to NTRS: 2005-10-31 Accession Number: 79N71987; Document ID: 19790072479; Report Number: NASA-CR-87087, TM-67-2012-2 Bellcomm/LRC limited lunar potential field determination for Apollo Author(s): Findlay, J. T.; Niedfeldt, B. G.; Tolson, R. H. Abstract: No Abstract Available NASA Center: NASA (non Center Specific) Publication Year: 1968 Added to NTRS: 2004-11-03 Accession Number: 79N73313; Document ID: 19790073805; Report Number: NASA-CR-100236 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007