USGS Professonal Paper 1096 - IRIS

PENNSYLVANIA--Continued
Garland, TX
INSTRUHENTATION--Continued
Seismometer Galvo Type Magnification
Co(le Iype Component 10 (sec) Ig(sec) recorchng ,t I 0
Remarks
(BB-PA) , (BD-PA) ,
(BV-PA) , (GT-PA) ,
tLT-PA) , tMR-PAJ.
(MS-PA), (SH-PA) ,
(TU-PA): Benioff--------- Z,NS,EW 1.0 --- Magnetic tape, (BB-PA) : 140 K ---
35 lIill' film. (BE pAJ. Hie K
(BV-PA) : 140 K
(GT-PA) : 140 K
(LT-PA) : 130 K
(MK-PA), 110K
(lIS PAl. Be K
(SH-PA) : 110 K
(Tll-PA): 110 K
Timing system: Geotech crystal clock checked with WWV (SO-msec tolerance) .
S) steIB respeftse Etll".es. See figUfE 3, ,. 36~ •
SHORT HISTORY
The LRSM program began in 1960 part of the VELA-Uniform project. It continued until 1971 , when it was replaced by the
Special 6ata Eollection System program " .. hieh rEiila111S aeli ue. \lork under lboese pregl"a",s boas beea threet-Ed t-evaEds ackaoeiag tile
seismic-detection, identification, ,nd location techniques necessary to detect ,nd identify underground nuclear explosions.
All work i, accomplished under the technical direction of AFTAC, Vela Seismic Center, in Alexandria, V,.
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