Data Quality Report for Order ID: 187094
User ID: norgrenm1    Date completed: 2017-08-07
All DQRs
DQR ID Subject Affected Data Streams Data Quality Metric
D170511.3 OLI/TRACEGAS/M1 - Data output changed to 0.5 Hz oliaoscoM1.a1 Note
 
DQR ID: D170511.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2017-04-13 15:25:42 2017-05-10 21:57:41 Note
Subject: OLI/TRACEGAS/M1 - Data output changed to 0.5 Hz
Affected Datastreams: oliaoscoM1.a1
Description In an effort to diagnoses data dropouts, the instrument output rate was changed from 1 Hz to 0.5 Hz. Since the instrument averages over the reported time and the dynamic time response is ~2-5 s, there is no appreciable loss in S/N or time response. Once tests are completed on the virtual machine and the LGR instrument, the reporting speed will be returned to 1 Hz.
Measurements
  • valve_position_MFC_2 (Valve position mass flow controller 2)
  • alt (Altitude above mean sea level)
  • n2o_dry (Nitrous oxide (N2O) mixing ratio corrected for water vapor concentration and calculated with nominal sensitivity correction)
  • time_offset (Time offset from base_time)
  • base_time (Base time in Epoch)
  • co_dry (Carbon monoxide (CO) mixing ratio corrected for water vapor concentration and calculated with nominal sensitivity correction)
  • lon (East longitude)
  • n2o (Nitrous oxide (N2O) mixing ratio calculated with nominal sensitivity correction)
  • lat (North latitude)
  • h2o (Water vapor mixing ratio calculated with nominal sensitivity correction)
  • mass_flow_through_MFC_1 (Actual mass flow through mass flow controller 1)
  • ambient_temperature (Ambient temperature of instrument)
  • set_point_for_MFC_1 (Set point for mass flow controller 1)
  • mass_flow_through_MFC_2 (Actual mass flow through mass flow controller 2)
  • co (Carbon monoxide (CO) mixing ratio calculated with nominal sensitivity correction)
  • set_point_for_MFC_2 (Set point for mass flow controller 2)
  • gas_temperature (Cell sample temperature)
  • gas_pressure (Cell sample pressure)
  • valve_position_MFC_1 (Valve position for mass flow controller 1)
  • time (Time offset from midnight)