DQRID : D050718.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/01/2005000007/16/20052300Incorrect
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Subject:
TWP/MPL/C1 - energy monitor spikes
DataStreams:twpmplC1.a1, twpmplC1.00
Description:
The energy monitor spiked to abnormal values, from 2 up to 25 microjoules per pulse. At 
the beginning, it was only a few intermittent spikes, but the spikes became more frequent. 
Most of June does not show a spiky energy monitor. On June 28-30, July 1-10 a diurnal 
pattern shows up. On July 12-13 it abruptly goes away and returns July 14-16 for 24hrs. Then 
abruptly stops again 17-19. Except for the 12th, the last changes occurred at 00:00 UTC 
suggesting a piece of equipment is turning on and off. I do not know why a noisy energy 
monitor would have a day/night or 00:00UTC dependence.
Suggestions: 
There is no work around to this problem for data users. You can not use the energy 

monitor to normalize the signal during the noisy periods.
Measurements:twpmplC1.a1:
  • energy_monitor
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twpmplC1.00:
  • Raw data stream - documentation not supported
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