DQRID : D050316.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/18/2002000003/15/20052359Does not affect quality
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Subject:
SGP/CO2FLX/C1 - Reprocessed: User Notes
DataStreams:sgp30co2flx4mmetC1.b1
Description:
Replacement of LI-200 sensor (total downwelling shortwave radiation, variable r_tot) by a 
new LI-190 sensor (upwelling photosynthetic photon flux density, variable ppfd_up).

The new LI-190 sensor was:
- installed on December 9, 2004. 
- being tested from December 9, 2004 to December 22, 2004.
- operational after December 22, 2004.

Consequently:
1. variable "r_tot" is filled with missing values (qc_r_tot = 1) after December 9, 2004,
2. variable "ppfd_up" is filled with missing values (qc_ppfd_up = 1) prior December 22, 
2004.
Suggestions: 
Datastream has been updated and re-submitted to the archive. Therefore, as long as 

the latest version of the data is being used there is no problem.
Measurements:sgp30co2flx4mmetC1.b1:
  • ppfd_up
  • r_tot
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