A Digital System for Accurate Time Sector Division of a Spin-Stabilized Vehicle
- 1 March 1967
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. AES-3 (2) , 230-235
- https://doi.org/10.1109/taes.1967.5408746
Abstract
This paper describes an aspect system flown on PIONEERS VI and VII2 which incorporates an extremely accurate adaptive digital computer in order to define rigorously equal time intervals which are submultiples of the spacecraft spin period. The several submultiples which compose the complete spin period exhibit equality to within 2.5 parts in 105. This system has potential applications in other experiments involving the study of the angular dependence of cosmic radiation and other physical phenomena being measured by a single directional detector mounted on spin-stabilized spacecraft. Included here are the scientific goals for this experiment, system restraints, and the generalized system operation. Some details on specific logic and hardware implementation for the Pioneer experiments are included along with in-flight performance evaluation of the system aboard PIONEER VI.Keywords
This publication has 3 references indexed in Scilit:
- Anisotropic cosmic radiation fluxes of solar originJournal of Geophysical Research, 1966
- The Collimation of Cosmic Rays by the Interplanetary Magnetic FieldJournal of Geophysical Research, 1966
- Asymptotic cones of acceptance and their use in the study of the daily variation of cosmic radiationJournal of Geophysical Research, 1963