Linear filtering of ballistic-entry-probe data for atmospheric reconstruction.A Kalman-Schmidt filter is used to estimate atmospheric and trajectory parameters for entry into the Venusian atmosphere. A significantly improved version of the Landing Trajectory Reconstruction (LTR) computer program, used to obtain the estimates is described. Major improvements involve precision and linearity control of numerical differencing, corrected perturbation modeling, and incorporation of a refractivity model. Important results show that gyroscopic data are not usable with LTR, that atmospheric properties are generally well estimated for altitudes less than 100 km, and that the two LTR modes of operation are complementary in performance.
Document ID
19730054036
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sabin, M. L. (USAF, Frank J. Seiler Research Laboratory, Colorado Springs Colo., United States)
Date Acquired
August 7, 2013
Publication Date
August 1, 1973
Subject Category
Navigation
Report/Patent Number
AIAA PAPER 73-904
Meeting Information
Meeting: Guidance and Control Conference
Location: Key Biscayne, FL
Start Date: August 20, 1973
End Date: August 22, 1973
Sponsors: American Institute of Aeronautics and Astronautics