SGP/AOS/C1 - CPC leak
|DataStreams:||sgpaosC1.a0, sgpnoaaaosC1.b1, sgpaoscpcC1.a1, sgpnoaaaosavgC1.b1, sgpnoaaaosC1.b0,|
There was a slow internal leak in the CPC instrument and the data slowly decreased over time. The CN concentration is a lower limit and is likely 5 to 20% lower than the actual value with higher errors toward the end of the DQR period. The problem was fixed by replacing the CPC saturator block.
Assume the concentration is low but that the daily trends are correct as they follow the CCN profiles.