| DQR ID | Subject | Data Streams Affected | Data Quality Metric |
|---|---|---|---|
| D000119.1 | SGP/GPS/X1 - GPS antenna upgrades | sgp30wpdngpsX1.00 | Does not affect quality |
| D000720.1 | SGP/GPS/X1 - Change in Algorithm | sgp30wpdngpsX1.00 | Does not affect quality |
| D060612.1 | SGP/WPDN/X1 - Missing data | sgp60fslwpdnmetX1.00, sgp06fslwpdnmetX1.00 | Missing |
| D061004.2 | SGP/WPDN/X1 - Data Corruption | sgp06fslwpdnmetX1.00, sgp60fslwpdnmetX1.00 | Incorrect |
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 01/01/1996 | 0000 | 12/26/1999 | 2359 | Does not affect quality |
| Subject: | SGP/GPS/X1 - GPS antenna upgrades |
| DataStreams: | sgp30wpdngpsX1.00 |
| Description: | Seth Gutman from NOAA/FSL informed me that the GPS antennas at three of the sites in their network were replaced with newer models. These newer antennas should result in better retrievals of PWV from the GPS. These sites and the dates the antennas where changed are: Lamont 12/23/1999 Purcell 12/26/1999 Plattville 12/16/1999 |
| Measurements: | sgp30wpdngpsX1.00:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 01/01/1996 | 0000 | 06/27/2000 | 2359 | Does not affect quality |
| Subject: | SGP/GPS/X1 - Change in Algorithm |
| DataStreams: | sgp30wpdngpsX1.00 |
| Description: | The algorithm for computing water vapor changed after this end date. The files generated after this date have a global attribute indicating the change. The new algorithm is to be documented in a NOAA Technical Memo. |
| Measurements: | sgp30wpdngpsX1.00:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 04/30/2006 | 0000 | 05/17/2006 | 2359 | Missing |
| Subject: | SGP/WPDN/X1 - Missing data |
| DataStreams: | sgp60fslwpdnmetX1.00, sgp06fslwpdnmetX1.00 |
| Description: | The Forecast Systems Laboratory (FSL) transferred of the NPN from ESRL/GSD to NWS starting 20060501. XDC began to retrieve WPDN data from UCAR IDD network on 05/18/2006. The data is missing in the interim. The replacement data for this time period can be picked up from the MADIS Archive. |
| Measurements: | sgp60fslwpdnmetX1.00:
sgp06fslwpdnmetX1.00:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 07/01/2006 | 0000 | 08/31/2006 | 2359 | Incorrect |
| Subject: | SGP/WPDN/X1 - Data Corruption |
| DataStreams: | sgp06fslwpdnmetX1.00, sgp60fslwpdnmetX1.00 |
| Description: | There were intermittent data corruption problems during July and August 2006. The problem was due to transmission problems between the original source (ESRL/GSD) and the intermediary data provider (IDD network). See PIF P060822.1 for more details. The raw data has various random errors and the quality of the data is questionable. Therefore, raw data should be with caution. |
| Measurements: | sgp60fslwpdnmetX1.00:
sgp06fslwpdnmetX1.00:
|