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USGS Professonal Paper 1096 - IRIS

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WASHINGTON--Continued<br />

Garland, TX<br />

Timing system: Geotech crystal clock checked with WWV (5D-msec tollCrance) .<br />

System responslC curves: See figure 3, p. 364.<br />

SHORT HISTORY<br />

The LR311 t'LU!'>LdUI began in 1~65 as part of diIC vELA-Unuorm proJect. 1L contlnued untll 19 f 1, wilen H was replaced by the<br />

Special Data Collection SystICm program which remains active. Work under these programs ho' been directed towards advancing the<br />

seismic-detection, idenlif i ca lion, and location techniqulCs nlCcessary to detect. ond ident.ify underground nuclear explosions.<br />

All work i, accomplished under the technical direction of AFTAC, Vela Seismic Center, in Alexandria, Vfl.<br />

:<br />

,<br />

342

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