John G. Sindorf; Analysis of the Data and Physical Aspects of the Palmer Seismological Observatory Tripartite. Seismological Research Letters ; 47 (1): 25–30. doi: https://doi.org/10.1785/gssrl.47.1.25
The physical characteristics of the Palmer Observatory Tripartite are discussed. Azimuth measurement methods from a nomograph which was drafted for the tripartite are explained. Analytical problems and solutions encountered in dealing with local and teleseismic events are discussed separately.