DQR ID | Subject | Data Streams Affected |
---|---|---|
D050310.1 | TWP/VCEIL/C2 - Ceilometer failure | twpvceil25kC2.00, twpvceil25kC2.b1 |
D050322.2 | TWP/SMET/C2 - Upper wind direction sensor failure | twpsmet60sC2.b1 |
D061011.3 | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC2.b1 |
D080428.4 | TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values | twpsmet60sC2.b1 |
D081022.5 | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage | twpsmet60sC2.b1 |
D100215.5 | TWP/VCEIL/C2 - Reprocess: Incorrect serial_number and sum_backscatter fields | twpvceil25kC2.b1 |
D120228.6 | TWP/MPLCMASK/C2 - Cloud layer metadata misleading | twp30smplcmask1zwangC2.c1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/26/2005 | 0600 | 04/01/2005 | 0007 |
Subject: | TWP/VCEIL/C2 - Ceilometer failure |
DataStreams: | twpvceil25kC2.00, twpvceil25kC2.b1 |
Description: | Large data gaps began occurring frequently at the TWP Nauru site 26 February at 06Z. Prior to 25 February, optical cross talk errors had been observed. Beginning on 25 February, data errors were observed. By 26 February, these errors were exhibiting themselves as extended data gaps. These gaps became increasingly frequent between 2/26 and 3/4. All data are missing after 20050304.1550. The instrument was replaced on 29 March and after some subsequent configuration work, the instrument was revived just after 00Z on 1 April. |
Measurements: | twpvceil25kC2.b1:
twpvceil25kC2.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2005 | 2300 | 04/17/2005 | 0332 |
Subject: | TWP/SMET/C2 - Upper wind direction sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | After replacement on 03/03/2005 the upper wind direction sensor began reporting erroneous values again on 03/09/2005 becoming very apparent after 03/17/2005. Wind speed data appears reasonable but the wind direction data do not agree well with the lower wind sensor. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0000 | 11/29/2006 | 2014 |
Subject: | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC2.b1 |
Description: | A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. Effective 20060926, two new variables (count and rain amount) were added to the end of the twpsmet60sC2.b1 datastream. Between 9/26 and 11/29, the data for these two variables are filled with zeros. Users should not use the data during this period as the zeros are not representative of the rain fall at the site. When reprocessing of this datastream occurs these variables will be added for the 19981021-20060926 and data from 19981021-20061129 will be filled with -9999 (missing). |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 0000 | 06/30/2010 | 2359 |
Subject: | TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | twpsmet60sC2.b1 |
Description: | The ORG data is collected via analog signal and not digital. Therefore, we continuously collect data even when no rain is occurring. We also capture small events such as leaves, large bugs, dust, etc blowing through the measurement path. Because this discrete event occurs quickly the value is usually captured for 1 or 2 seconds. This value is then averaged to the minute producing rainrate on the order of .009 mm/hr or less. These values are not indicative of rain and should be removed from the record or summing over long periods can bias the climate record. We will reprocess the data to remove these small values. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/1998 | 0000 | 02/23/2009 | 0410 |
Subject: | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC2.b1 |
Description: | The marine model of the RM Young wind sensor needs twisted pair shielded cable. The manufacturer did not originally supply the pigtail with twisted pair shielded cable. Use of twisted pair shielded cable for the rest of the cable run to the logger was also not specified. This caused an induced voltage in the wind speed line from the wind direction excitation. The induced voltage varied from sensor to sensor and probably changed anytime the cable was replaced or parts of the wind sensor were repaired or replaced. The induced voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0000 | 10/31/2009 | 2359 |
Subject: | TWP/VCEIL/C2 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | twpvceil25kC2.b1 |
Description: | Attribute serial_number: In most cases, this field is not representative of the actual serial number of the instrument because the value did not change when an instrument changed locations or was replaced with a spare. Variable sum_backscatter: An out-of-range condition for the "sum of detected and normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 0.0999 /srad. This DQR also applies to a1 level data. |
Measurements: | twpvceil25kC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/1998 | 0000 | 11/27/2006 | 2359 |
Subject: | TWP/MPLCMASK/C2 - Cloud layer metadata misleading |
DataStreams: | twp30smplcmask1zwangC2.c1 |
Description: | The comment in the header for cloud_base_layer indicates that a value of -1 indicates that no cloud is detected. For the specified time range, a value of 0 indicates that no cloud is detected. Values greater than zero indicate cloudy conditions, otherwise it is clear. |
Measurements: | twp30smplcmask1zwangC2.c1:
|