DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D030922.3 | NSA/MPL/C1 - laser head failure | nsamplC1.a1, nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 | Missing |
D040124.1 | NSA/MPL/C1 - Laser Q-Switch Problem | nsamplC1.a1, nsamplpsC1.a0, nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 | Incorrect |
D040229.1 | NSA/MPL/C1 - Instrument problem | nsamplC1.a1, nsamplpsC1.a0 | Incorrect |
D040426.3 | NSA/MPL/C1 - Hardware Failure/Missing Data | nsamplC1.a1, nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 | Missing |
D050112.1 | NSA/C1 - Site-wide power failure | nsamplC1.a1, nsamplpsC1.a0 | Missing |
D050215.2 | NSA/MPL/C1 - Frost on Viewport Window | nsamplC1.a1 | Does not affect quality |
D050215.3 | NSA/MPL/C1 - Frost on Viewport Window | nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 | Does not affect quality |
D050215.4 | NSA/MPL/C1 - Frost on Viewport Window | nsamplpsC1.a0 | Does not affect quality |
D050215.5 | NSA/MPL/C1 - MPL clock drift | nsamplC1.a1, nsamplpsC1.a0 | Suspect |
D050331.3 | PYE/MPL/M1 - wrong temperature calibration | pyemplM1.a1 | Incorrect |
D050608.1 | NSA/MPL/C1 - Diode failure | nsamplC1.a1, nsamplpsC1.a0 | Incorrect |
D060221.1 | NIM/MPL/M1 - False Positive Cloud Base Height Values During Solar Noon | nimmplM1.a1 | Suspect |
D060317.1 | PYE/MPL/M1 - Erroneous temperatures | pyemplM1.a1 | Incorrect |
D060327.3 | NSA/MPL/C1 - Intermittent Double Pulse from MPL laser | nsamplC1.a1 | Does not affect quality |
D060327.5 | PYE/MPL/M1 - Intermittent Double Pulse from MPL laser | pyemplM1.a1 | Does not affect quality |
D060327.6 | NIM/MPL/M1 - Intermittent Double Pulse from MPL laser | nimmplM1.a1 | Does not affect quality |
D070105.2 | NSA/MPL/C1 - Detector Failure | nsamplpolC1.b1 | Incorrect |
D070122.1 | NSA/MPL/C1 - Missing data | nsamplpolC1.b1 | Missing |
D070608.1 | NSA/MPL/C1 - No cross polarized data | nsamplpolC1.b1 | Incorrect |
D070814.2 | FKB/MPL/M1 - Striping of vertical time section for signal return | fkbmplpolM1.b1 | Does not affect quality |
D071022.3 | NSA/MPL/C1 - Bad Cross-Polarized data | nsamplpolC1.b1, nsamplpolavgC1.c1 | Incorrect |
D080215.2 | NSA/MPL/C1/C2 - No cross polarization data | nsamplpolC1.b1, nsamplpolavgC1.c1 | Incorrect |
D090212.4 | HFE/MPL/M1 - Frosting/Condensation | hfemplpolM1.b1 | Suspect |
D090715.1 | GRW/MPL/M1 - Missing data | grwmplpolM1.b1 | Missing |
D110504.1 | GRW/MPL/M1 - Time clock Error | grwmplpolM1.b1 | Suspect |
D120131.4 | SBS/MPL/S1 - Degradation of cross-pol component | sbsmplpolfsS1.b1 | Suspect |
D120228.2 | NSA/MPLCMASK/C1 - Cloud layer metadata misleading | nsa30smplcmask1zwangC1.c1 | Does not affect quality |
D130227.1 | PVC/MPL/M1 - Instrument failure after power outage | pvcmplpolfsM1.b1 | Incorrect |
D130911.5 | MAG/MPL/M1 - Instrument problem causing pulse failure | magmplpolfsM1.b1 | Incorrect |
D131007.6 | MAG/ALL/M1 - Ship in Dry Dock | magmplpolfsM1.b1 | Missing |
D131219.5 | ENA/MPL/C1 - Reprocessing Notice (RID 1003) | enamplpolfsC1.b1 | Does not affect quality |
D140219.1 | MAG/MPL/M1 - Missing data | magmplpolfsM1.b1 | Missing |
D140219.2 | MAG/MPL/M1 - Loss of transmit signal triggers incorrect height | magmplpolfsM1.b1 | Incorrect |
D140506.5 | OLI/MPL/M1 - No transmit pulse: receive only | olimplpolfsM1.b1 | Incorrect |
D140506.6 | MAO/MPL/M1 - No transmit pulse, background only | maomplpolfsM1.b1 | Incorrect |
D140611.17 | NSA/MPLCMASK/C1 - Reprocessing Notice (RID 1137) | nsa30smplcmask1zwangC1.c1 | Does not affect quality |
D140611.20 | MAO/MPLCMASK/M1 - Reprocessing Notice (RID 1139) | mao30smplcmask1zwangM1.c1 | Does not affect quality |
D140612.1 | FKB/MPLCMASK/M1 - Reprocessing Notice (RID 1141) | fkb30smplcmask1zwangM1.c1 | Does not affect quality |
D140612.2 | GAN/MPLCMASK/M1 - Reprocessing Notice (RID 1142) | gan30smplcmask1zwangM1.c1 | Does not affect quality |
D140612.3 | HFE/MPLCMASK/M1 - Reprocessing Notice (RID 1143) | hfe30smplcmask1zwangM1.c1 | Does not affect quality |
D140612.4 | PVC/MPLCMASK/M1 - Reprocessing Notice (RID 1144) | pvc30smplcmask1zwangM1.c1 | Does not affect quality |
D140818.2 | OLI/MPL/M1 - Laser transmit problem | olimplpolfsM1.b1 | Incorrect |
D150123.4 | OLI/MPL/M1 - Environmental | olimplpolfsM1.b1 | Missing |
D150211.2 | MAG/AOS/ALL/M1/S1/S2 - Ship in port | magmplpolfsM1.b1 | Suspect |
D150311.10 | MAO/MPL/M1 - Reprocessing Notice (RID 1313) | maomplpolfsM1.b1 | Does not affect quality |
D150311.11 | OLI/MPL/M1 - Reprocessing Notice (RID 1314) | olimplpolfsM1.b1 | Does not affect quality |
D150311.12 | PGH/MPL/M1 - Reprocessing Notice (RID 1315) | pghmplpolfsM1.b1 | Does not affect quality |
D150311.13 | PVC/MPL/M1 - Reprocessing Notice (RID 1316) | pvcmplpolfsM1.b1 | Does not affect quality |
D150311.14 | TMP/MPL/M1 - Reprocessing Notice (RID 1317) | tmpmplpolfsM1.b1 | Does not affect quality |
D150311.2 | NSA/MPL/C1 - Reprocessing Notice (RID 1305) | nsamplpolfsC1.b1 | Does not affect quality |
D150311.5 | SBS/MPL/S1 - Reprocessing Notice (RID 1308) | sbsmplpolfsS1.b1 | Does not affect quality |
D150311.6 | ENA/MPL/C1 - Reprocessing Notice (RID 1309) | enamplpolfsC1.b1 | Does not affect quality |
D150311.8 | GAN/MPL/M1 - Reprocessing Notice (RID 1311) | ganmplpolfsM1.b1 | Does not affect quality |
D150311.9 | MAG/MPL/M1 - Reprocessing Notice (RID 1312) | magmplpolfsM1.b1 | Does not affect quality |
D150327.5 | OLI/MPL/M1 - Data not available | olimplpolfsM1.b1 | Missing |
D150417.6 | OLI/MPL/M1 - Data not available | olimplpolfsM1.b1 | Missing |
D150424.3 | OLI/MPL/M1 - Data unavailable | olimplpolfsM1.b1 | Missing |
D160401.6 | OLI/MPL/M1 - Broken heater fan | olimplpolfsM1.b1 | Suspect |
D160427.7 | ENA/C1 - Reprocess: Slightly incorrect location fields | enamplpolfsC1.b1 | Suspect |
D160722.3 | ASI/MPL/M1 - instrument | asimplpolfsM1.b1 | Missing |
D160726.1 | OLI/MPL/M1 - Instrument communication failure | olimplpolfsM1.b1 | Incorrect |
D161019.2 | ASI/MPL/M1 - Reprocess: New overlap correction | asimplpolfsM1.b1 | Does not affect quality |
D161028.4 | AWR/MPLCMASK/M1 - Reprocess: Software Error | awr30smplcmask1zwangM1.c1 | Does not affect quality |
D161031.12 | ASI/MPL/M1 - Instrument averaging time increased to 30 seconds | asimplpolfsM1.b1 | Does not affect quality |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/28/2002 | 0200 | 08/29/2002 | 0100 | Missing |
Subject: | NSA/MPL/C1 - laser head failure |
DataStreams: | nsamplC1.a1, nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 |
Description: | On 2002-04-28 the laser energy was observed to decrease throughout the day. Although low clouds continued to be detected, by the end of the day the output laser energy was about 10% of nomimal. This decrease continued throughout 2002-04-29 to the extent that clouds were no longer detected. The source of failure was eventually determined to be the laser head, requiring the MPL to be shipped for repair. The MPL was reinstalled on 2002-08-28 at about 01:00 UTC. MPL NSA data from 2002-04-29 through 2002-08-27 (inclusive) should not be used. |
Measurements: | nsamplC1.a1:
nsamplsmask1clothC1.c1:
nsamplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/19/2004 | 2252 | 01/24/2004 | 0016 | Incorrect |
Subject: | NSA/MPL/C1 - Laser Q-Switch Problem |
DataStreams: | nsamplC1.a1, nsamplpsC1.a0, nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 |
Description: | At about 22:52 UTC on 2004/01/19, the NSA MPL appears to have suffered a temporary failure of the laser Q-Switch. This results in a complete loss of lidar data immediately thereafter. The problem was resolved (at least for the time being) by disconnecting and reconnecting the Q-Switch cable on 2004/01/24 at about 00:16 UTC. Data after this time appears good. |
Measurements: | nsamplC1.a1:
nsamplsmask1clothC1.c1:
nsamplpsC1.a0:
nsamplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/18/2004 | 0830 | 02/24/2004 | 0830 | Incorrect |
Subject: | NSA/MPL/C1 - Instrument problem |
DataStreams: | nsamplC1.a1, nsamplpsC1.a0 |
Description: | On 2/18, the energy monitor on the MPL dropped from 11 microjoules per second to 2 microjoules per second. This severely affected data quality. This appears to be have been an intermittent cable problem for the laser Q-Switch. A new cable was provided and installed on 2-24. |
Measurements: | nsamplC1.a1:
nsamplpsC1.a0:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/21/2003 | 0500 | 12/01/2003 | 1441 | Missing |
Subject: | NSA/MPL/C1 - Hardware Failure/Missing Data |
DataStreams: | nsamplC1.a1, nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 |
Description: | Data are missing during this extended period due to a hardware failure. |
Measurements: | nsamplC1.a1:
nsamplsmask1clothC1.c1:
nsamplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/13/2004 | 1000 | 12/13/2004 | 2330 | Missing |
Subject: | NSA/C1 - Site-wide power failure |
DataStreams: | nsamplC1.a1, nsamplpsC1.a0 |
Description: | The Barrow facility experienced a site-wide power failure on 12/13. Power was restored to most instruments between 2250 and 2330 GMT. |
Measurements: | nsamplC1.a1:
nsamplpsC1.a0:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/21/1998 | 0000 | 09/25/2006 | 2159 | Does not affect quality |
Subject: | NSA/MPL/C1 - Frost on Viewport Window |
DataStreams: | nsamplC1.a1 |
Description: | During periods of extremely cold outside temperatures (-30 C or below), the MPL may suffer from reduced sensitivity due to obscuration of its viewport window with frost or condensation. During the winter of 1998-1999, on-site observers noted frost or condensation obscuring part or all of the viewport window. A fan providing blowing heated air on the viewport had failed. Although replacement of this fan reduced the degree of obscuration, the problem was not entirely eliminated. During the summer of 1999 a more robust forced-air system was installed and the problem was essentially solved except for during isolated cases of extremely cold weather. Under these extreme conditions partial or complete obscuration of the window is still possible with the result that cloud detection sensitivity will be reduced depending on the fraction of the window surface obscured. Even with significant obscuration, the MPL may still detect clouds and the cloud base heights of detected clouds will be reported correctly. This problem is one of detection sensitivity only and does not affect the range scale in any way. |
Measurements: | nsamplC1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/07/1998 | 0000 | 08/31/2009 | 2357 | Does not affect quality |
Subject: | NSA/MPL/C1 - Frost on Viewport Window |
DataStreams: | nsamplsmask1clothC1.c1, nsamplcmask1clothC1.c1 |
Description: | During periods of extremely cold outside temperatures (-30 C or below), the MPL may suffer from reduced sensitivity due to obscuration of its viewport window with frost or condensation. During the winter of 1998-1999, on-site observers noted frost or condensation obscuring part or all of the viewport window. A fan providing blowing heated air on the viewport had failed. Although replacement of this fan reduced the degree of obscuration, the problem was not entirely eliminated. During the summer of 1999 a more robust forced-air system was installed and the problem was essentially solved except for during isolated cases of extremely cold weather. Under these extreme conditions partial or complete obscuration of the window is still possible with the result that cloud detection sensitivity will be reduced depending on the fraction of the window surface obscured. Even with significant obscuration, the MPL may still detect clouds and the cloud base heights of detected clouds will be reported correctly. This problem is one of detection sensitivity only and does not affect the range scale in any way. |
Measurements: | nsamplsmask1clothC1.c1:
nsamplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/11/2003 | 0000 | 09/27/2006 | 2259 | Does not affect quality |
Subject: | NSA/MPL/C1 - Frost on Viewport Window |
DataStreams: | nsamplpsC1.a0 |
Description: | During periods of extremely cold outside temperatures (-30 C or below), the MPL may suffer from reduced sensitivity due to obscuration of its viewport window with frost or condensation. During the winter of 1998-1999, on-site observers noted frost or condensation obscuring part or all of the viewport window. A fan providing blowing heated air on the viewport had failed. Although replacement of this fan reduced the degree of obscuration, the problem was not entirely eliminated. During the summer of 1999 a more robust forced-air system was installed and the problem was essentially solved except for during isolated cases of extremely cold weather. Under these extreme conditions partial or complete obscuration of the window is still possible with the result that cloud detection sensitivity will be reduced depending on the fraction of the window surface obscured. Even with significant obscuration, the MPL may still detect clouds and the cloud base heights of detected clouds will be reported correctly. This problem is one of detection sensitivity only and does not affect the range scale in any way. |
Measurements: | nsamplpsC1.a0:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/11/2003 | 0000 | 02/05/2004 | 0000 | Suspect |
Subject: | NSA/MPL/C1 - MPL clock drift |
DataStreams: | nsamplC1.a1, nsamplpsC1.a0 |
Description: | The MPL PC clock was noted to be off (slow) by more than an hour over a several day period. It has previously been noted that the time synchronization program "D-4" fails to update the PC clock under certain circumstances. As a result, the program "D-4" was replaced by "AboutTime" on 2/5/2004. The specifics of this problem are not well understood. It turns out that the instrument has TWO clocks on the instrument computer display - one being displayed by the MPL software and the other being the PC clock displayed in the lower right-hand corner of the screen. The MPL software clock was the one that is noted on daily rounds and was never off by any amount. Apparently the only clock that was off was the computer clock. What is clear is that between the time the MPL computer was installed on 11-11-2003 and the CM log on 1-06-2004 the MPL clock exhibited a discrepancy of over 1 hour and 20 minutes. What is not clear is whether this clock discrepancy was also applied to the data time stamps. Furthermore, seven days later the MPL clock exhibited only a 1.77 second drift. Not exceptional at all, and not in line with the previous discrepancy of more than 4800 seconds over a span of 57 days. Attempts to identify gradual correctible clock drift in the MPL data were not successful. As a worst-case scenario, the MPL data may be inappropriately time-stamped by as much a 1 hour 20 minutes and 41 seconds slow relative to UTC between the dates of 2003-11-11 and 2004-01-06. After this time until 2004-02-05 time synchronization was maintained within a few seconds a day with local observer assistance. |
Measurements: | nsamplC1.a1:
nsamplpsC1.a0:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/22/2005 | 0000 | 05/05/2005 | 2359 | Incorrect |
Subject: | PYE/MPL/M1 - wrong temperature calibration |
DataStreams: | pyemplM1.a1 |
Description: | Wrong calibration coefficients were applied to the temperature values. These are engineering housekeeping data only. The scientifically relevant measurements were unaffected. |
Measurements: | pyemplM1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/25/2005 | 1600 | 04/01/2005 | 2310 | Incorrect |
Subject: | NSA/MPL/C1 - Diode failure |
DataStreams: | nsamplC1.a1, nsamplpsC1.a0 |
Description: | On 3/25, the energy monitor on the MPL dropped from 11 microjoules per second to 2 microjoules per second. We determined the problem was the diode; it reached the end of its lifetime. A replacement was sent. Data quality returned to normal. |
Measurements: | nsamplC1.a1:
nsamplpsC1.a0:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/27/2005 | 0000 | 04/20/2006 | 1400 | Suspect |
Subject: | NIM/MPL/M1 - False Positive Cloud Base Height Values During Solar Noon |
DataStreams: | nimmplM1.a1 |
Description: | As the laser ages, the output reduces. This lowers the signal to noise ratio. The lower signal to noise ratio interferes with the cloud base height algorithm to correctly determine if a cloud is actually present. During solar noon the signal to noise ratio is the lowest. This condition results in many false positive values. The values start at a high altitude and progressively get lower as the sun gets to zenith. The trend reverses as the sun passes. The pattern in the data resembles a V shape starting 2 hours before solar noon to 2 hour past. A low incident of false positive values exists from 20051227. However, the condition becomes prominent on 20060303 - 20060420. The cloud base calibration table was modified to compensate for the lower signal to noise levels. Note: If a cloud is actually present, the cloud base algorithm will determine the height and report correctly. The false positive values are only a concern during cloud free conditions. |
Measurements: | nimmplM1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/22/2005 | 0000 | 03/15/2005 | 2359 | Incorrect |
Subject: | PYE/MPL/M1 - Erroneous temperatures |
DataStreams: | pyemplM1.a1 |
Description: | The temperature readings for the laser, detector, and instrument are erroneous. Incorrect calibration factors; data should not be used. This time period is prior to the official start of the PYE deployment. |
Measurements: | pyemplM1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/01/2005 | 0000 | 09/25/2006 | 2359 | Does not affect quality |
Subject: | NSA/MPL/C1 - Intermittent Double Pulse from MPL laser |
DataStreams: | nsamplC1.a1 |
Description: | When Spectra Physics discontinued support for their laser diode power supply, an alternative was needed to extend the usefulness of the Spectra Physics laser head inside the MPLs. The solution was to use a Coherent laser diode. Unfortunately, the Coherent diode lasers do not have the exact same characteristics as the Spectra Physics diode lasers. As a result, the output of the Spectra Physics laser head sometimes produces a second pulse close in time but lower in intensity from the first main pulse. This is known as double pulsing. Not all of the Spectra Physics/Coherent combination systems produce a double pulse and the systems that do produce a double pulse do not always exhibit this behavior. It can be identified by a second peak at ~.2km. At first glance the signal in the data will resemble a low aerosol or cloud layer. When the double pulse is weak, the atmospheric signal will obscure the double pulse signal. At the ARM sites with a sunshade such as TWP and AMF, the double pulse can be seen when the sunshade closes during solar noon. When the sunshade closes, the MPL does not see atmospheric signal so the second pulse is evident. At SGP, a daily window cleaning is part of the routine. During this time the double pulse can be seen. Without a sunshade or window cleaning it is impossible to say definitively if double pulse is present. The first system to produce a double pulse was MPL s/n 008 located at TWP C2 Nauru in February 2005. The second system was MPL s/n 004 located at SGP in August 2005. The potential for the other systems to produce a double pulse is high. However, as of March 2006, the MPLs at NSA, TWP C1, TWP C3 and AMF have not recorded data with the double pulse artifact. The ARM program is in the process of replacing all the MPLs with a newer model. After the new MPLs are deployed the double pulse problem should not be an issue. The old systems will be relegated as spares. The double pulse problem will return if an old system is needed to replace a failed new system. |
Measurements: | nsamplC1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/01/2005 | 0000 | 09/15/2005 | 1300 | Does not affect quality |
Subject: | PYE/MPL/M1 - Intermittent Double Pulse from MPL laser |
DataStreams: | pyemplM1.a1 |
Description: | When Spectra Physics discontinued support for their laser diode power supply, an alternative was needed to extend the usefulness of the Spectra Physics laser head inside the MPLs. The solution was to use a Coherent laser diode. Unfortunately, the Coherent diode lasers do not have the exact same characteristics as the Spectra Physics diode lasers. As a result, the output of the Spectra Physics laser head sometimes produces a second pulse close in time but lower in intensity from the first main pulse. This is known as double pulsing. Not all of the Spectra Physics/Coherent combination systems produce a double pulse and the systems that do produce a double pulse do not always exhibit this behavior. It can be identified by a second peak at ~.2km. At first glance the signal in the data will resemble a low aerosol or cloud layer. When the double pulse is weak, the atmospheric signal will obscure the double pulse signal. At the ARM sites with a sunshade such as TWP and AMF, the double pulse can be seen when the sunshade closes during solar noon. When the sunshade closes, the MPL does not see atmospheric signal so the second pulse is evident. At SGP, a daily window cleaning is part of the routine. During this time the double pulse can be seen. Without a sunshade or window cleaning it is impossible to say definitively if double pulse is present. The first system to produce a double pulse was MPL s/n 008 located at TWP C2 Nauru in February 2005. The second system was MPL s/n 004 located at SGP in August 2005. The potential for the other systems to produce a double pulse is high. However, as of March 2006, the MPLs at NSA, TWP C1, TWP C3 and AMF have not recorded data with the double pulse artifact. The ARM program is in the process of replacing all the MPLs with a newer model. After the new MPLs are deployed the double pulse problem should not be an issue. The old systems will be relegated as spares. The double pulse problem will return if an old system is needed to replace a failed new system. |
Measurements: | pyemplM1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/25/2005 | 0000 | 01/07/2007 | 2300 | Does not affect quality |
Subject: | NIM/MPL/M1 - Intermittent Double Pulse from MPL laser |
DataStreams: | nimmplM1.a1 |
Description: | When Spectra Physics discontinued support for their laser diode power supply, an alternative was needed to extend the usefulness of the Spectra Physics laser head inside the MPLs. The solution was to use a Coherent laser diode. Unfortunately, the Coherent diode lasers do not have the exact same characteristics as the Spectra Physics diode lasers. As a result, the output of the Spectra Physics laser head sometimes produces a second pulse close in time but lower in intensity from the first main pulse. This is known as double pulsing. Not all of the Spectra Physics/Coherent combination systems produce a double pulse and the systems that do produce a double pulse do not always exhibit this behavior. It can be identified by a second peak at ~.2km. At first glance the signal in the data will resemble a low aerosol or cloud layer. When the double pulse is weak, the atmospheric signal will obscure the double pulse signal. At the ARM sites with a sunshade such as TWP and AMF, the double pulse can be seen when the sunshade closes during solar noon. When the sunshade closes, the MPL does not see atmospheric signal so the second pulse is evident. At SGP, a daily window cleaning is part of the routine. During this time the double pulse can be seen. Without a sunshade or window cleaning it is impossible to say definitively if double pulse is present. The first system to produce a double pulse was MPL s/n 008 located at TWP C2 Nauru in February 2005. The second system was MPL s/n 004 located at SGP in August 2005. The potential for the other systems to produce a double pulse is high. However, as of March 2006, the MPLs at NSA, TWP C1, TWP C3 and AMF have not recorded data with the double pulse artifact. The ARM program is in the process of replacing all the MPLs with a newer model. After the new MPLs are deployed the double pulse problem should not be an issue. The old systems will be relegated as spares. The double pulse problem will return if an old system is needed to replace a failed new system. |
Measurements: | nimmplM1.a1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/22/2006 | 1200 | 01/03/2007 | 1900 | Incorrect |
Subject: | NSA/MPL/C1 - Detector Failure |
DataStreams: | nsamplpolC1.b1 |
Description: | Beginning 12/25, the signal return displayed serious aliasing, reflection, or ringing of the detector, with a highly repetitive pattern repeating six or more times within the lowest 15 km. On 01/02, the detector became very difficult to put into any type of operating condition. When it did operate, the "aliased" signal pattern was still present. The detector was replaced. |
Measurements: | nsamplpolC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/03/2007 | 1900 | 01/12/2007 | 0130 | Missing |
Subject: | NSA/MPL/C1 - Missing data |
DataStreams: | nsamplpolC1.b1 |
Description: | System was down for detector replacement. |
Measurements: | nsamplpolC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/23/2007 | 1730 | 06/19/2007 | 1700 | Incorrect |
Subject: | NSA/MPL/C1 - No cross polarized data |
DataStreams: | nsamplpolC1.b1 |
Description: | The cross polarizor was not functioning so there is no cross polarized data. All data during the specified period is circularly polarized. |
Measurements: | nsamplpolC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/27/2007 | 0000 | 11/21/2007 | 1800 | Does not affect quality |
Subject: | FKB/MPL/M1 - Striping of vertical time section for signal return |
DataStreams: | fkbmplpolM1.b1 |
Description: | Vertical stripes were showing up in the MPLPOL backscatter plots. Problem was likely associated with turbulence from the heating fan air blowing in front of telescope. Data are still good for almost all uses. In particular, cloud detection algorithms are unaffected. Depolarization is seemingly unaffected. Only in possible calculation of extinction will this be a possible problem. |
Measurements: | fkbmplpolM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/23/2007 | 0330 | 06/19/2007 | 1700 | Incorrect |
Subject: | NSA/MPL/C1 - Bad Cross-Polarized data |
DataStreams: | nsamplpolC1.b1, nsamplpolavgC1.c1 |
Description: | The polarizer box was not recycled when the system was rebooted; thus only circularly polarized light was being emitted. Ignore all cross polarized data. |
Measurements: | nsamplpolC1.b1:
nsamplpolavgC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/08/2008 | 1900 | 01/29/2008 | 2100 | Incorrect |
Subject: | NSA/MPL/C1/C2 - No cross polarization data |
DataStreams: | nsamplpolC1.b1, nsamplpolavgC1.c1 |
Description: | Even though the polarization voltage was reported as switching between circular and cross polarization states, there was no cross polarization taking place because the polarization box had not been recycled following a system reboot. You will not be able to create depolarization values. However all other processes, such as cloud base determination should be ok. |
Measurements: | nsamplpolC1.b1:
nsamplpolavgC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/18/2008 | 0000 | 12/28/2008 | 0000 | Suspect |
Subject: | HFE/MPL/M1 - Frosting/Condensation |
DataStreams: | hfemplpolM1.b1 |
Description: | On various days during the China deployment, condensation accumulated on the view port window of the MPL and compromised its capability to detect clouds. This problem most often occurred during nighttime hours from May through early September. During the listed times, cloud retrievals and aerosol profiles should be considered doubtful or in error. The dates/times of occurrence are: 16:00-23:59 GMT on 05/18 17:00-22:00 GMT on 05/23 20:00-22:00 GMT on 05/25 15:00-23:59 GMT on 06/07 17:00-23:59 GMT on 06/08 15:00-23:00 GMT on 06/09 14:00-18:00 GMT on 06/18 18:00-21:00 GMT on 06/21 14:00-16:00 GMT on 06/23 16:00-21:00 GMT on 06/27 17:00-20:00 GMT on 06/28 22:00 GMT on 06/29 19:00-23:00 GMT on 06/30 13:30-22:30 GMT on 07/02 16:00-17:30 GMT on 07/03 20:30-22:00 GMT on 07/03 21:30-22:30 GMT on 07/05 13:00-22:00 GMT on 07/06 17:00-18:00 GMT on 07/07 21:00-22:30 GMT on 07/07 16:00-23:59 GMT on 07/10 11:00-23:00 GMT on 07/11 18:00-23:00 GMT on 07/12 15:00-16:00 GMT on 07/13 18:00-23:59 GMT on 07/14 18:00-21:00 GMT on 07/15 17:30-23:00 GMT on 07/16 17:00-23:00 GMT on 07/17 13:00-23:30 GMT on 07/20 18:00-23:00 GMT on 07/24 21:00-23:00 GMT on 07/25 21:00-22:30 GMT on 07/27 12:00-23:59 GMT on 08/02 16:00-21:30 GMT on 08/03 16:00-23:00 GMT on 08/04 14:00-22:30 GMT on 08/05 19:00-23:00 GMT on 08/07 19:00-21:30 GMT on 08/08 15:00-23:30 GMT on 08/10 17:30-23:30 GMT on 08/12 14:00-15:00 GMT on 08/14 16:30-22:30 GMT on 08/14 21:30-22:30 GMT on 08/17 12:00-23:59 GMT on 08/18 12:00-13:30 GMT on 08/19 20:00-23:30 GMT on 08/19 15:00-23:59 GMT on 08/20 11:00-23:59 GMT on 08/22 11:00-23:30 GMT on 08/23 12:00-23:30 GMT on 08/25 13:00-23:30 GMT on 08/26 16:30-23:59 GMT on 08/27 17:00-23:00 GMT on 08/31 15:00-23:59 GMT on 09/01 15:00-20:00 GMT on 09/02 19:30-23:59 GMT on 09/05 16:30-22:30 GMT on 09/09 19:30-23:59 GMT on 09/12 20:30-23:59 GMT on 09/15 14:00-16:30 GMT on 09/16 19:00-23:59 GMT on 09/16 20:30-23:59 GMT on 10/29 22:00-23:59 GMT on 11/01 20:00-23:59 GMT on 11/23 00:00-02:00 GMT on 11/24 |
Measurements: | hfemplpolM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/14/2009 | 2059 | 09/04/2009 | 0800 | Missing |
Subject: | GRW/MPL/M1 - Missing data |
DataStreams: | grwmplpolM1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | grwmplpolM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/30/2010 | 0000 | 05/04/2010 | 0000 | Suspect |
Subject: | GRW/MPL/M1 - Time clock Error |
DataStreams: | grwmplpolM1.b1 |
Description: | Domain Time II was not installed or working properly on the MPLPOL instrument at the initial start at GRW. The clock was off by 5 minutes 55 seconds at the beginning of the period and drifted further so it was off by 6 minutes 8 seconds at the end of the time period. |
Measurements: | grwmplpolM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/08/2011 | 0000 | 04/24/2011 | 0000 | Suspect |
Subject: | SBS/MPL/S1 - Degradation of cross-pol component |
DataStreams: | sbsmplpolfsS1.b1 |
Description: | During this period, the cross polarization component steadily degraded. It is difficult to ascertain the exact date when this began to occur because the atmosphere is light on aerosols and has considerable ice particles which leads to apparent cross polarization when this may not have been the case. During the latter half of this deployment, depolarization values are likely too large and should be regarded with care. Cloud determination is likely unaffected. |
Measurements: | sbsmplpolfsS1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/22/1998 | 0000 | 09/25/2006 | 2359 | Does not affect quality |
Subject: | NSA/MPLCMASK/C1 - Cloud layer metadata misleading |
DataStreams: | nsa30smplcmask1zwangC1.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: | nsa30smplcmask1zwangC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/29/2012 | 2000 | 01/23/2013 | 1900 | Incorrect |
Subject: | PVC/MPL/M1 - Instrument failure after power outage |
DataStreams: | pvcmplpolfsM1.b1 |
Description: | MPL was intermittently down for a few days before going completely down for ~17 days. When it came back online on 10/22, the background signals were too high. The instrument was replaced 20130123. |
Measurements: | pvcmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/03/2013 | 0000 | 06/03/2013 | 2200 | Incorrect |
06/08/2013 | 0000 | 06/08/2013 | 2359 | Incorrect |
Subject: | MAG/MPL/M1 - Instrument problem causing pulse failure |
DataStreams: | magmplpolfsM1.b1 |
Description: | False triggering of the laser causes ingest to misinterpret beginning of data. Moreover, laser does not produce full pulse, so there is no reliable data. |
Measurements: | magmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/08/2013 | 1745 | 05/11/2013 | 0548 | Missing |
Subject: | MAG/ALL/M1 - Ship in Dry Dock |
DataStreams: | magmplpolfsM1.b1 |
Description: | Ship was at dry dock without MAGIC instruments or in transit to or from dry dock. No instrument data available. |
Measurements: | magmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/02/2013 | 1458 | 11/30/2013 | 1241 | Does not affect quality |
Subject: | ENA/MPL/C1 - Reprocessing Notice (RID 1003) |
DataStreams: | enamplpolfsC1.b1 |
Description: | See below for details of reprocessing that was completed on 20150626. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- The MPL was on standard time, not UTC, and the problem went uncorrected until 20131130. Data have a one hour time offset. Data marked with timestamp 000000 should be corrected to reflect the actual UTC time of 010000. |
Measurements: | enamplpolfsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/14/2013 | 0000 | 08/02/2013 | 2359 | Missing |
08/13/2013 | 0900 | 09/26/2013 | 2359 | Missing |
Subject: | MAG/MPL/M1 - Missing data |
DataStreams: | magmplpolfsM1.b1 |
Description: | System returned to vendor for repair. Laser power supply problems. Data are missing and unrecoverable. |
Measurements: | magmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
08/12/2013 | 0000 | 08/12/2013 | 2359 | Incorrect |
Subject: | MAG/MPL/M1 - Loss of transmit signal triggers incorrect height |
DataStreams: | magmplpolfsM1.b1 |
Description: | Range gate information is incorrect because zero-height bin not identified due to insufficient transmit signal |
Measurements: | magmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/26/2014 | 1200 | 05/06/2014 | 1653 | Incorrect |
05/10/2014 | 0000 | 05/12/2014 | 1812 | Incorrect |
Subject: | OLI/MPL/M1 - No transmit pulse: receive only |
DataStreams: | olimplpolfsM1.b1 |
Description: | There was no laser firing during this period. Background values only |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/22/2014 | 0000 | 04/22/2014 | 1200 | Incorrect |
04/12/2014 | 0000 | 04/12/2014 | 1900 | Incorrect |
04/23/2014 | 0000 | 04/23/2014 | 1200 | Incorrect |
04/16/2014 | 0000 | 04/16/2014 | 1200 | Incorrect |
Subject: | MAO/MPL/M1 - No transmit pulse, background only |
DataStreams: | maomplpolfsM1.b1 |
Description: | No transmit pulse produced by instrument resulting in no backscatter returns. Only background values recorded. |
Measurements: | maomplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/29/2006 | 0000 | 06/06/2014 | 2359 | Does not affect quality |
Subject: | NSA/MPLCMASK/C1 - Reprocessing Notice (RID 1137) |
DataStreams: | nsa30smplcmask1zwangC1.c1 |
Description: | See below for details of reprocessing that was completed on 20140807. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Linear depolarization ratio calculation is incorrect in the VAP processing code. |
Measurements: | nsa30smplcmask1zwangC1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/19/2013 | 0000 | 06/06/2014 | 2359 | Does not affect quality |
Subject: | MAO/MPLCMASK/M1 - Reprocessing Notice (RID 1139) |
DataStreams: | mao30smplcmask1zwangM1.c1 |
Description: | See below for details of reprocessing that was completed on 20140807. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Linear depolarization ratio calculation is incorrect in the VAP processing code. |
Measurements: | mao30smplcmask1zwangM1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/17/2007 | 0000 | 12/31/2007 | 2359 | Does not affect quality |
Subject: | FKB/MPLCMASK/M1 - Reprocessing Notice (RID 1141) |
DataStreams: | fkb30smplcmask1zwangM1.c1 |
Description: | See below for details of reprocessing that was completed on 20140807. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Linear depolarization ratio calculation is incorrect in the VAP processing code. |
Measurements: | fkb30smplcmask1zwangM1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/30/2011 | 0000 | 02/08/2012 | 2359 | Does not affect quality |
Subject: | GAN/MPLCMASK/M1 - Reprocessing Notice (RID 1142) |
DataStreams: | gan30smplcmask1zwangM1.c1 |
Description: | See below for details of reprocessing that was completed on 20140807. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Linear depolarization ratio calculation is incorrect in the VAP processing code. |
Measurements: | gan30smplcmask1zwangM1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/15/2008 | 0000 | 12/28/2008 | 2359 | Does not affect quality |
Subject: | HFE/MPLCMASK/M1 - Reprocessing Notice (RID 1143) |
DataStreams: | hfe30smplcmask1zwangM1.c1 |
Description: | See below for details of reprocessing that was completed on 20140807. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Linear depolarization ratio calculation is incorrect in the VAP processing code. |
Measurements: | hfe30smplcmask1zwangM1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/23/2012 | 0000 | 07/02/2013 | 2359 | Does not affect quality |
Subject: | PVC/MPLCMASK/M1 - Reprocessing Notice (RID 1144) |
DataStreams: | pvc30smplcmask1zwangM1.c1 |
Description: | See below for details of reprocessing that was completed on 20140807. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Linear depolarization ratio calculation is incorrect in the VAP processing code. |
Measurements: | pvc30smplcmask1zwangM1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/28/2014 | 0000 | 06/29/2014 | 0252 | Incorrect |
07/05/2014 | 0600 | 07/05/2014 | 0800 | Incorrect |
06/24/2014 | 2226 | 06/26/2014 | 0200 | Incorrect |
Subject: | OLI/MPL/M1 - Laser transmit problem |
DataStreams: | olimplpolfsM1.b1 |
Description: | Laser transmit did not occur correctly, resulting in only background values. |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/31/2014 | 0346 | 01/08/2015 | 2043 | Missing |
Subject: | OLI/MPL/M1 - Environmental |
DataStreams: | olimplpolfsM1.b1 |
Description: | Data missing due to generator failure |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
08/29/2013 | 1248 | 08/31/2013 | 1220 | Suspect |
08/01/2013 | 1247 | 08/03/2013 | 1410 | Suspect |
11/01/2012 | 1314 | 11/03/2012 | 1757 | Suspect |
07/12/2013 | 0601 | 07/13/2013 | 1218 | Suspect |
06/06/2013 | 1240 | 06/08/2013 | 1125 | Suspect |
09/20/2012 | 1327 | 09/22/2012 | 1223 | Suspect |
11/08/2012 | 1330 | 11/09/2012 | 1732 | Suspect |
01/03/2013 | 0635 | 01/05/2013 | 0523 | Suspect |
10/25/2012 | 0612 | 10/26/2012 | 0650 | Suspect |
11/30/2012 | 0130 | 12/01/2012 | 1332 | Suspect |
08/15/2013 | 1312 | 08/17/2013 | 1902 | Suspect |
05/30/2013 | 0538 | 05/31/2013 | 1148 | Suspect |
11/22/2012 | 0615 | 11/24/2012 | 1105 | Suspect |
10/04/2012 | 1359 | 10/06/2012 | 1132 | Suspect |
09/26/2013 | 1319 | 09/28/2013 | 1135 | Suspect |
08/22/2013 | 0907 | 08/23/2013 | 1747 | Suspect |
06/13/2013 | 0545 | 06/14/2013 | 1705 | Suspect |
09/12/2013 | 1340 | 09/14/2013 | 1305 | Suspect |
07/18/2013 | 2232 | 07/20/2013 | 1252 | Suspect |
05/16/2013 | 0535 | 05/17/2013 | 1704 | Suspect |
09/12/2012 | 1255 | 09/14/2012 | 2326 | Suspect |
06/27/2013 | 0650 | 06/28/2013 | 1759 | Suspect |
12/20/2012 | 0738 | 12/22/2012 | 0847 | Suspect |
12/06/2012 | 0842 | 12/07/2012 | 0820 | Suspect |
07/25/2013 | 0507 | 07/26/2013 | 1342 | Suspect |
09/27/2012 | 0533 | 09/28/2012 | 0952 | Suspect |
06/20/2013 | 1303 | 06/22/2013 | 1205 | Suspect |
05/23/2013 | 1323 | 05/25/2013 | 1204 | Suspect |
07/03/2013 | 2232 | 07/07/2013 | 1800 | Suspect |
08/08/2013 | 0459 | 08/09/2013 | 1040 | Suspect |
09/05/2013 | 0548 | 09/06/2013 | 1248 | Suspect |
10/03/2013 | 0545 | 10/04/2013 | 1038 | Suspect |
12/13/2012 | 1440 | 12/15/2012 | 1351 | Suspect |
10/11/2012 | 0600 | 10/12/2012 | 0850 | Suspect |
12/27/2012 | 2334 | 12/29/2012 | 1306 | Suspect |
11/15/2012 | 1430 | 11/17/2012 | 1315 | Suspect |
10/18/2012 | 1318 | 10/20/2012 | 1128 | Suspect |
09/19/2013 | 0536 | 09/20/2013 | 1150 | Suspect |
Subject: | MAG/AOS/ALL/M1/S1/S2 - Ship in port |
DataStreams: | magmplpolfsM1.b1 |
Description: | The ship was in port during these periods and the measurements may be affected by various sources (overhead cranes, anthropogenic sources, etc). Note: Dates and times were found by looking at the NAV datastream. The standard deviation of pitch, roll, and surge velocity were used to determine when the ship was slowing down to enter port or speeding up to leave port. Thresholds used; pitch (0.01), roll (0.01), surge velocity (3.0) |
Measurements: | magmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/17/2013 | 1457 | 05/18/2015 | 2359 | Does not affect quality |
Subject: | MAO/MPL/M1 - Reprocessing Notice (RID 1313) |
DataStreams: | maomplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20160107. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | maomplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/12/2013 | 1907 | 05/18/2015 | 2359 | Does not affect quality |
Subject: | OLI/MPL/M1 - Reprocessing Notice (RID 1314) |
DataStreams: | olimplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20160107. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/04/2012 | 0608 | 04/01/2012 | 0455 | Does not affect quality |
Subject: | PGH/MPL/M1 - Reprocessing Notice (RID 1315) |
DataStreams: | pghmplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20151207. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | pghmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/23/2012 | 1352 | 07/03/2013 | 1400 | Does not affect quality |
Subject: | PVC/MPL/M1 - Reprocessing Notice (RID 1316) |
DataStreams: | pvcmplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20151207. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | pvcmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/16/2014 | 0000 | 09/13/2014 | 0700 | Does not affect quality |
Subject: | TMP/MPL/M1 - Reprocessing Notice (RID 1317) |
DataStreams: | tmpmplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20151207. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | tmpmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/07/2010 | 1916 | 05/18/2015 | 2359 | Does not affect quality |
Subject: | NSA/MPL/C1 - Reprocessing Notice (RID 1305) |
DataStreams: | nsamplpolfsC1.b1 |
Description: | See below for details of reprocessing that was completed on 20160107. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | nsamplpolfsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/23/2010 | 2200 | 04/25/2011 | 1500 | Does not affect quality |
Subject: | SBS/MPL/S1 - Reprocessing Notice (RID 1308) |
DataStreams: | sbsmplpolfsS1.b1 |
Description: | See below for details of reprocessing that was completed on 20151207. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | sbsmplpolfsS1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/02/2013 | 1458 | 05/18/2015 | 2359 | Does not affect quality |
Subject: | ENA/MPL/C1 - Reprocessing Notice (RID 1309) |
DataStreams: | enamplpolfsC1.b1 |
Description: | See below for details of reprocessing that was completed on 20160107. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | enamplpolfsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/30/2011 | 0836 | 02/09/2012 | 0900 | Does not affect quality |
Subject: | GAN/MPL/M1 - Reprocessing Notice (RID 1311) |
DataStreams: | ganmplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20151207. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | ganmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/13/2012 | 2241 | 08/13/2013 | 1500 | Does not affect quality |
Subject: | MAG/MPL/M1 - Reprocessing Notice (RID 1312) |
DataStreams: | magmplpolfsM1.b1 |
Description: | See below for details of reprocessing that was completed on 20151207. Original DQR category: 0 (Black, Missing). ----------------------------------------------------------- preliminary_cbh data are were never derived and are set to -9999. |
Measurements: | magmplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/01/2015 | 0632 | 03/18/2015 | 1700 | Missing |
Subject: | OLI/MPL/M1 - Data not available |
DataStreams: | olimplpolfsM1.b1 |
Description: | No data available from any instruments during this time period. |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/30/2015 | 1957 | 04/02/2015 | 1315 | Missing |
Subject: | OLI/MPL/M1 - Data not available |
DataStreams: | olimplpolfsM1.b1 |
Description: | There is no data during this time period |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/19/2015 | 1328 | 04/21/2015 | 1754 | Missing |
Subject: | OLI/MPL/M1 - Data unavailable |
DataStreams: | olimplpolfsM1.b1 |
Description: | No data available |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/18/2016 | 0000 | 03/28/2016 | 1600 | Suspect |
Subject: | OLI/MPL/M1 - Broken heater fan |
DataStreams: | olimplpolfsM1.b1 |
Description: | MPL data is not noticeably affected by the failure of the heater fan. For the time period of the DQR, a comparison with ceilometer signal returns shows similar cloud base heights. |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/29/2013 | 0941 | 04/30/2016 | 2359 | Suspect |
Subject: | ENA/C1 - Reprocess: Slightly incorrect location fields |
DataStreams: | enamplpolfsC1.b1 |
Description: | Some of the instruments are being processed with the previous "GRW-Azores" lat/lon/alt instead of the new "ENA-Azores" lat/lon/alt. The differences are minor, but will be corrected. The respective GRW and ENA lat, lon, and alt values are as follows: GRW lat = 39.0911 ; ENA lat = 39.0916 ; GRW lon = -28.0297 ; ENA lon = -28.0257 ; GRW alt = 26 ; ENA alt = 30.48 ; |
Measurements: | enamplpolfsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/01/2016 | 0000 | 07/02/2016 | 1305 | Missing |
Subject: | ASI/MPL/M1 - instrument |
DataStreams: | asimplpolfsM1.b1 |
Description: | Later than planned deployment of the instrument. |
Measurements: | asimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/12/2016 | 2110 | 07/22/2016 | 1605 | Incorrect |
Subject: | OLI/MPL/M1 - Instrument communication failure |
DataStreams: | olimplpolfsM1.b1 |
Description: | Data missing. Data collected during the period from 13:00 UTC 07/20/16 to 16:00 UTC 07/22/16 is just noise as instrument communication failed during this time. |
Measurements: | olimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/02/2016 | 1300 | 10/27/2016 | 2359 | Does not affect quality |
Subject: | ASI/MPL/M1 - Reprocess: New overlap correction |
DataStreams: | asimplpolfsM1.b1 |
Description: | Vendor has recently provided an overlap correction which needs to replace the overlap currently being included in the data files. This does not affect MPL data quality. |
Measurements: | asimplpolfsM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/01/2016 | 0148 | 08/13/2016 | 0218 | Does not affect quality |
Subject: | AWR/MPLCMASK/M1 - Reprocess: Software Error |
DataStreams: | awr30smplcmask1zwangM1.c1 |
Description: | The MPLCMASK VAP was expecting the MPL to be covered around local solar noon. As a result, the algorithm intermittently set much of the data to -9999 during this time period after the site transitioned to total darkness during the winter months. During the peak of this problem, the impacted fields were set to -9999 from approximately 0:00-2:19 UTC each day. This information is being provided in a transparent DQR due to the intermittent nature of the problem and the fact that the impacted data are already set to -9999 and flagged by the automated quality control variables in the VAP. A future reprocessing task will correct this problem. |
Measurements: | awr30smplcmask1zwangM1.c1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/06/2016 | 2036 | 10/11/2016 | 2137 | Does not affect quality |
Subject: | ASI/MPL/M1 - Instrument averaging time increased to 30 seconds |
DataStreams: | asimplpolfsM1.b1 |
Description: | To understand what was causing frequent spikes in the MPL energy levels, the averaging time was increased to 30s during this period. The averaging time was reverted back to the original 10s averaging time at the end of the DQR period. |
Measurements: | asimplpolfsM1.b1:
|