First-time users will need to load the Adobe Acrobat Reader on their computers to read the articles in the APL Technical Digest. If you need assistance, see your Systems Administrator.
A Brief History of Early Navigation
D. Sobel
Genesis of Satellite Navigation
W. H. Guier and G. C. Weiffenbach
An Overview of Transit Development
R. J. Danchik
Innovations Derived from the Transit Program
G. C. Kennedy and M. J. Crawford
The Transit Satellite Geodesy Program
S. M. Yionoulis
The Space Environment
C. O. Bostrom and D. J. Williams
Development of Receivers to Characterize Transit Time and Frequency Signals
L. J. Rueger
Applications of Transit Satellite Technology to Biomedical Devices
R. E. Fischell
Computerized Ionospheric Tomography
A. J. Tucker
THE COVER: Key aspects of the Transit Navigation System are depicted on the cover. The spacecraft is one of several Transit satellites that provided the basic measurements needed to determine one's location for navigational purposes. The contoured Earth shows the variation in the gravitational field that had to be precisely known for accurate orbit prediction. The plasma emanating from the Sun and surrounding the Earth depicts the highly active magnetosphere in which the satellites had to operate successfully. (Cover illustration by Kenneth R. Moscati.)
Inside front cover information: