USGS Professonal Paper 1096 - IRIS

ALASKA·-Continued
Garland, TX
Timina systea: Geotech crystal clock checked with WWV (50-.sec tolerance).
System response curves: See figure 3, p. 364.
SHORT HISTORY
The LRSH program began in 1960 as part of the VELA·Uniform project. It continued until 1971, when it was replaced by the
Special Data Collection System program which remains active. Work under these progra.s has been directed towards advancing the
seismic·detection, identification, and location techniques necessary to detect and identify underground nuclear explosions.
All work is accomplished under the technical direction of AFTAC, Vela Seismic Center, in Alexandria, Va.
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