DQR ID | Subject | Data Streams Affected |
---|---|---|
D050803.4 | PYE/NFOV/M1 - Intermittent missing data | pyenfov2chM1.00, pyenfov2chM1.b1 |
D050803.5 | PYE/NFOV/M1 - Intermittent data gaps | pyenfov2chM1.00, pyenfov2chM1.b1 |
D080222.2 | SGP/RSS/C1 - Stability and nonlinearity corrections | sgprssC1.00, sgprssC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/18/2005 | 1900 | 09/10/2005 | 0055 |
Subject: | PYE/NFOV/M1 - Intermittent missing data |
DataStreams: | pyenfov2chM1.00, pyenfov2chM1.b1 |
Description: | During the Pt Reyes deployment of the NFOV, the instrument experienced intermittent data gaps due to communications problems. Data gaps occurred for the following date ranges: 20050718-20050723 20050727-20050730 20050803-20050804 20050813-20050816 20050820-20050822 20050826-20050827 20050830-20050902 20050908-20050910 |
Measurements: | pyenfov2chM1.b1:
pyenfov2chM1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/18/2005 | 1900 | 07/30/2005 | 1200 |
Subject: | PYE/NFOV/M1 - Intermittent data gaps |
DataStreams: | pyenfov2chM1.00, pyenfov2chM1.b1 |
Description: | Intermittent data collection of the NFOV. Data collection not successful regularly during day light hours but generally caught up during the nighttime hours. Occasionally the system stopped collecting altogether and a reboot of the network components was required to restart collection. Data gaps are largest 18 through 23 of July and 27 through 30 July. |
Measurements: | pyenfov2chM1.b1:
pyenfov2chM1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/01/2003 | 1200 | 09/27/2007 | 0017 |
Subject: | SGP/RSS/C1 - Stability and nonlinearity corrections |
DataStreams: | sgprssC1.00, sgprssC1.b1 |
Description: | From the very beginning after deployment in May 2003 we observed several effects that we did not anticipate during the pre-deployment lab test. They were: (1) Rapid drop in responsivity; (2) Responsivity having 1/lambda wavelike periodicity; (3) Appearance of nonlinearity within 3 months; (4) Larger than expected diurnal wavelength changes and long term wavelength drift. Right away we responded with development of correction algorithms and methods. (1) and (2) are corrected to within 2-3% with biweekly lamp calibrations; (3) Nonlinearity factor is derived from calibration data and applied in correction; and (4) is efficiently corrected with Fourier correlation algorithm applied to every spectrum (once a minute). Furthermore we perform Langley regression processing (not a part of official data stream) that corrects longer term drifts in responsivity and should correct calibration lamp biases. The Vo's from Langley regressions are available via RSS web page. The overhaul of the instrument is planned to eliminate or at least reduce nonlinerarity stability problems. We hope that after the overhaul data processing would be simplified and the frequency of calibrations would be reduced. |
Measurements: | sgprssC1.00:
sgprssC1.b1:
|