| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D970921.1 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D970921.2 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D970921.3 | Pressure jump at launch | sgpsondewrpnB4.a1 |
| D970923.2 | Pressure jump at launch | sgpsondewrpnC1.a1 |
| D970930.1 | Pressure jump at launch | sgpsondewrpnB1.a1 |
| D970930.2 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D971002.1 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D971006.2 | Pressure jump after launch | sgpsondewrpnB6.a1 |
| D971007.1 | Weird surface value problem | sgpsondewrpnB4.a1 |
| D971013.1 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/16/1997 | 1728 | 09/16/1997 | 1728 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The first pressure value reported by the sonde after launch (966.1) is lower than the surface pressure value (972.1) by a greater difference than normally would be expected. This may indicate that the sonde was jarred on launch, that the system mis-identified actual launch time, or that the operator entered and incorrect value (typo or read too early). The altitude values for this sounding will be wrong as will the ascent rates during the first 30 seconds. If the ascent rates were such that the sample acceptance criteria were violated, the pressure, temperature, and RH values in the first part of the profile may be the result of interpolation. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/17/1997 | 0530 | 09/17/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the sonde (958.8) and the surface pressure (969.3) is considerable greater than would be expected. The altitude values for this sounding will be incorrect, as will be the ascent rate values during the first 30 seconds. Values of P, T, and RH during the first 30 seconds will most likely be values interpolated betwen the surface and the 30 second sample. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/17/1997 | 2030 | 09/17/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | The difference between the first pressure reported by the sonde after launch (930.0) and that reported at the surface (935.7) is larger than would be expected. The altitude values for this sounding will be incorrect, as will be the ascent rates for the first 30 seconds. Some of the P, T, and RH samples (most likely those nearest the ground) will be interpolated values. |
| Measurements: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/21/1997 | 0530 | 09/21/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The difference between the first pressure value recorded by the radiosonde after launch (984.5) that the surface value entered by the operator (989.3) is somewhat larger than would normally be expected. This will result in incorrect altitude values throughout the sounding. The ascent rates during the first 30 seconds also will be incorrect. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1997 | 0530 | 09/27/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB1.a1 |
| Description: | The difference between first pressure value reported by the radiosonde after launch (954.4) and the surface value entered by the operator (961.7) is greater than expected , indicating that either ths sonde was jarred on launch or that the system mis-identified start time. |
| Measurements: | sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1997 | 2030 | 09/27/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the radiosonde aloft (957.9) and the surface value entered by the operator (962.6) is greater than would be expected normally. This may indicate that the sonde was jarred at launch or that the system mis-identified the launch start time. The altitude values for this sounding will be incorrect as will be the ascent rates in the first 30 seconds. If the reported ascent rates exceed 12 m/s, the thermodynamic data will be interpolated rather than sampled. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/29/1997 | 2030 | 09/29/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the sonde after launch (968.5) and the surface value entered by the opertor (973.5) is greater than would normally be expected. This may indicate that either the sonde was jarred at launch or that the system mis-identified launch start time. The altitude values for this sounding will be in error and the ascent rate values in the first 30 seconds also will be wrong. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/29/1997 | 2030 | 09/29/1997 | 2030 |
| Subject: | Pressure jump after launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the sonde after launch (968.5) and the surface value entered by the operator (973.8) is greater than would normally be expected. The altitude values for this sounding will be incorrect as will be the ascent rates for the first 30 seconds. Some of the thermodynamic data at the beginning of the soundings (when ascent rates exceed 12 m/s) will be the result of interpolation between the surface value and the first value obtained when the ascent rate with in acceptable limits. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/04/1997 | 1430 | 10/04/1997 | 1430 |
| Subject: | Weird surface value problem |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | For some unknown reason, the surface values of pressure, temperature, and rh in this file are corrupted. The correct values are in the raw data file, which looks normal. The correct values are 938.2 hPa, 22.1 degC, and 50% RH instead of 20001 hPa, 501.0 degC and 11501 RH. Because the raw data looks fine, all the other values in this file should be correct. |
| Measurements: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/06/1997 | 0854 | 10/06/1997 | 0854 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value obtained from the sonde after launch (971.1) and the value of surface pressure entered by the operator (976.8) is larger than usual. I note that soundings done at 0530 and 1130 have surface pressures of 973.2. It may be a typographic error by the operator, jarring of the sensor at launch, or mis-identification of the start time by the system. In any event, the absolute altitudes for this sounding will be wrong, and the ascent rates during the first 30 seconds also will be too high. |
| Measurements: | sgpsondewrpnB6.a1:
|