The table below contains the quality flags associated with CDOM sensor calbration evaluations and the associated scaling used to bring various sensors into alignment. Refer to the QA/QC general information page for information on the different quality levels. The following slides provide details on CDOM data scaling & data quality evaluation: SATURN CDOM Sensor Performance & Data Scaling.pptx
SATURN-03
| Quality Flag | Start Time | End Time | Scale Factor | Offset | Comment | Instrument |
|---|---|---|---|---|---|---|
| QL2 | 8/2/12 | 9/23/13 | 0.918 | -0.396 | This CDOM sensor was calibrated prior to deployment at SATURN-03 on 8/2/12. It was removed from the station on 9/23/13 and replaced with a different sensor. It was reinstalled again for a week in late October. Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data from this sensor during this time were scaled by a factor of 0.918 and corrected for a small offset. | WSCD#1339 |
| QL2 | 9/23/13 | 10/22/13 | 0.932 | 0.008 | This CDOM sensor is typically deployed at SATURN-04. It was installed at SATURN-03 for approximately a month. Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data from this sensor during this time were scaled by a factor of 0.93 and corrected for a small offset. See QA/QC supporting documentation for additional information. | WCSD#1338 |
| QL2 | 10/22/13 | 10/31/13 | 0.918 | -0.396 | This CDOM sensor was calibrated prior to deployment at SATURN-03 on 8/2/12. It was removed from the station on 9/23/13 and replaced with a different sensor. It was reinstalled again for a week in late October. Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data from this sensor during this time were scaled by a factor of 0.918 and corrected for a small offset. | WSCD#1339 |
| QL2 | 10/31/13 | 1/3/14 | 0.876 | 0.216 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data from this sensor during this time were scaled by a factor of 0.88 and corrected for a small offset. | WSCD#1337 |
| QL2 | 1/3/14 | 1/14/14 | 1.143 | 0.36 | This sensor was deployed for a brief period at SATURN-03 during early January 2014. Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data from this sensor during this time were scaled by a factor of 1.14 and corrected for a small offset. | WSCD#1339 |
| QL2 | 1/14/14 | 4/15/14 | 0.88 | 0.216 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data from this sensor during this time were scaled by a factor of 0.88 and corrected for a small offset. | WSCD#1337 |
| QL3 | 4/15/14 | 12/7/14 | 0.876 | 0.216 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The readings indicate that the sensor response was similar to previous checks and the the data were scaled by a factor of 0.88 and corrected for a small offset. | WSCD#1337 |
| QL3 | 12/7/14 | 5/5/15 | 1.09 | -1.034 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. There was a shift in response between the sensor check on 4/15/14 & 5/5/15. The timing and nature (abrupt shift or gradual drift) of the shift in response is unknown. Examinitation of the data and comparisons to nearby stations were used to estimate the time of change as early December 2014. Data should be used with caution due to this uncertainty. The data during this time period were scaled by a factor of 1.09 and corrected for an approximate offset of 1ppb. | WSCD#1337 |
| QL2 | 5/5/15 | 2/1/16 | 1.09 | -1.034 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. There was a shift in response between the sensor check on 4/15/14 & 5/5/15. The data following the sensor check in early May until the sensor was recovered in March 2016 were scaled by a factor of 1.09 and corrected for an approximate offset of 1ppb. | WSCD#1337 |
| QL2 | 3/17/16 | 12/1/16 | 1.813 | -0.931 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. There was a shift in response between the sensor check on 4/15/14 & 5/5/15. The data following the sensor check in early May until the sensor was recovered in March 2016 were scaled by a factor of 1.09 and corrected for an approximate offset of 1ppb. | WSCD#1337 |
| QL2 | 10/1/17 | 8/1/18 | 1.813 | -0.931 | Sensor checks in reference solutions were used to scale output from the SATURN CDOM sensors to a common scale. The data following the sensor calibration were scaled by a factor of 1.813 and corrected for an offset of ~ 1ppb. | WSCD#1337 |