DQR ID | Subject | Data Streams Affected |
---|---|---|
D101223.1 | TWP/SKYRAD/C2 - Suspect PIR1 data | twpskyrad60sC2.b1, twpskyrad20sC2.a0 |
D110831.1 | TWP/SKYRAD/C2 - Tracker failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D111026.1 | TWP/SKYRAD/C2 - IRT power failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D120606.5 | TWP/QCRAD/C2 - Downwelling LW too high | twpqcrad1longC2.c1, twpqcrad1longC2.c2, twpqcrad1longC2.s1, twpqcrad1longC2.s2 |
D120607.3 | TWP/QCRAD/C2 - Tracker failure | twpqcrad1longC2.c1, twpqcrad1longC2.c2, twpqcrad1longC2.s1, twpqcrad1longC2.s2 |
D120813.1 | TWP/SKYRAD/C2 - Downwelling LW #1 questionable | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D121127.1 | TWP/SKYRAD/C2 - Tracker Failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D121128.2 | TWP/SKYRAD/C2 - Tracker problem | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/23/2010 | 2200 | 09/28/2010 | 2200 |
10/05/2010 | 2200 | 10/11/2010 | 0600 |
Subject: | TWP/SKYRAD/C2 - Suspect PIR1 data |
DataStreams: | twpskyrad60sC2.b1, twpskyrad20sC2.a0 |
Description: | PIR1 was exhibiting unusual data excursions during the specified time ranges and data are suspect. The problem spontaneously resolved on October 11th without site ops action. The problem has not returned. |
Measurements: | twpskyrad60sC2.b1:
twpskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/16/2011 | 2335 | 08/15/2011 | 0130 |
Subject: | TWP/SKYRAD/C2 - Tracker failure |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Description: | Tracker failed on 6/16/2011. Ops replaced with a spare tracker. The affected instruments are the 8-48 (down_short_diffuse) and NIP (direct_normal) shortwave instruments. The down_long_hemisp1 and 2 (PIR1 and PIR2) performance may have been affected by exposure to direct sun. |
Measurements: | twpskyrad60sC2.b1:
twpskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/24/2011 | 0854 | 10/25/2011 | 0115 |
Subject: | TWP/SKYRAD/C2 - IRT power failure |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Description: | The IRT measurements were incorrect due to a drop in the logger battery voltage. |
Measurements: | twpskyrad60sC2.b1:
twpskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2011 | 0143 | 01/28/2011 | 0600 |
Subject: | TWP/QCRAD/C2 - Downwelling LW too high |
DataStreams: | twpqcrad1longC2.c1, twpqcrad1longC2.c2, twpqcrad1longC2.s1, twpqcrad1longC2.s2 |
Description: | Downwelling longwave irradiance was too high compared to another instrument, possibly due to a bad connection. Problem described in instrument DQR D110317.3: |
Measurements: | twpqcrad1longC2.c2:
twpqcrad1longC2.c1:
twpqcrad1longC2.s1:
twpqcrad1longC2.s2:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/01/1999 | 0000 | 11/01/1999 | 0000 |
05/26/2001 | 1200 | 06/18/2001 | 0400 |
06/25/2001 | 1800 | 08/16/2001 | 0400 |
12/01/2003 | 0000 | 01/01/2004 | 0000 |
12/17/2008 | 1942 | 12/21/2008 | 2215 |
03/25/2009 | 2000 | 05/18/2009 | 0442 |
06/16/2011 | 2335 | 08/15/2011 | 0130 |
10/06/2011 | 0000 | 12/31/2011 | 0000 |
Subject: | TWP/QCRAD/C2 - Tracker failure |
DataStreams: | twpqcrad1longC2.c1, twpqcrad1longC2.c2, twpqcrad1longC2.s1, twpqcrad1longC2.s2 |
Description: | Tracker appears to be out of alignment or inoperative during these times. The short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) data appear to be bad and not recoverable. Several of these periods are documented in instrument DQRs: D110831.1, D090328.1, D081222.3, D040107.1, D011207.1, D011019.8 |
Measurements: | twpqcrad1longC2.c2:
twpqcrad1longC2.c1:
twpqcrad1longC2.s1:
twpqcrad1longC2.s2:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/09/2011 | 0420 | 02/15/2012 | 0100 |
03/09/2012 | 2100 | 03/15/2012 | 2315 |
Subject: | TWP/SKYRAD/C2 - Downwelling LW #1 questionable |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Description: | Hemispheric downwelling measurements on the hemisp1 were suspect due to the large differences between PIR1 and PIR2 (i.e. greater than 10W/m2). Maintenance on 3/14/2012 indicated problem with the connector and ops re-seated the connector on PIR 1. After the maintenance, PIR1 and PIR2 returned to tracking each other within 10W/m2 as typical. |
Measurements: | twpskyrad60sC2.b1:
twpskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/08/2011 | 0000 | 02/16/2012 | 2300 |
Subject: | TWP/SKYRAD/C2 - Tracker Failure |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Description: | The solar tracker failed resulting in incorrect short_direct_normal and down_short_diffuse_hemisp data. Data are not recoverable. |
Measurements: | twpskyrad60sC2.b1:
twpskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/20/2012 | 0000 | 09/19/2012 | 0100 |
Subject: | TWP/SKYRAD/C2 - Tracker problem |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Description: | The tracker has a problem in tracking the sun continuously in the southern hemisphere and close to the equator. This happened between the March equinox and September equinox around solar noon. Affected hours are between 00:00 to 1:00 each day for the specified time range. Note: This will likely occur again in 2013 between March equinox and September equinox around solar noon. Note2: The tracker tracking being off only affects data when there is direct sun, i.e. when the sun is not blocked by cloud. Thus in the tropics much of this data are not inherently "bad" plus only the direct and diffuse are "bad" when there's direct sun present. The QCRad has a test for "tracker off" that detects the tracker not shading the diffuse instrument and the NIP not being aimed at the sun when the sun is not blocked by cloud. Thus the ARM recommended measure QCRad data set will catch most of these "bad" data and set the values to "-9999.9" when the sun is not blocked by cloud, and leave the data that is OK when the sun is blocked by cloud (unless that data fails some other testing of course). |
Measurements: | twpskyrad60sC2.b1:
twpskyrad20sC2.a0:
|