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 Earth Sciences Sector > Priorities > Canadian Hazards Information Service > Earthquakes Canada |
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Calibration Change in SEED Waveform Files |
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On Monday October 3, 1994 at 17:45, the CNSN Data Acquisition software was modified to remove a scaling factor (transmission gain) of either 2**5 = 32 (most sites) or 2**8 = 256 (BBB, PGC, PNT). Yellowknife Array sites (YK*) are not affected. This has the effect of dividing each sample value by a factor of 32 or 256. Correct response information is written into the SEED file headers.
