DQR ID | Subject | Data Streams Affected |
---|---|---|
D000613.1 | TWP/C2/GNDRAD Net radiometer | twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
D000711.62 | TWP/C1/GNDRAD Net Radiometer: Cracked dome | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D000711.64 | TWP/GNDRAD/C1 - Net Radiometer: Correction for negative net fluxes | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D000711.68 | TWP/GNDRAD/C1 - PIR: Incorrect wiring | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D000711.70 | TWP/GNDRAD/C1 - PIR and IRT: surface temperature comparison | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D000718.20 | TWP/GNDRAD/C1 - PIR: Extended data gap | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D000718.21 | TWP/GNDRAD/C1 - PSP: Comparison test | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D000726.5 | TWP/GNDRAD/C1 - Extended data gap | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D011211.5 | TWP/GNDRAD/C1 - GNDRAD radiometer replacement | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D020613.2 | TWP/C2 Installation | twpgndradC2.00, twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
D020620.61 | TWP/C1 - Incorrect elevation reported in Manus Data | twpsmet60sC1.a1, twpsmet60sC1.b1, twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D030224.1 | TWP/GNDRAD/C2 - Calibration Check; GNDRAD instruments inverted | twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
D030317.3 | TWP/GNDRAD/C1 - GNDRAD logger configured as SMET | twpgndradC1.00, twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D030730.1 | TWP/GNDRAD/C2 - IRT problem | twpgndrad60sC2.b1 |
D031007.4 | TWP/GNDRAD/C2 - Data unrepresentative during radiometer comparison | twpgndrad20sC2.a1, twpgndrad60sC2.a1 |
D031215.2 | TWP/GNDRAD/C1 -PIRdown and PSPdown Inverted for Comparison | twpgndradC1.00, twpgndrad20sC1.a1, twpgndrad60sC1.b1 |
D040416.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D040813.9 | TWP/GNDRAD/C1 - RESET 14 activities | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D040929.2 | TWP/GNDRAD/C2 - inverted PIR and PSP | twpgndrad20sC2.a0 |
D041015.3 | TWP/GNDRAD/C2 - incorrect IRT calibration | twpgndrad60sC2.b1 |
D041106.2 | TWP/GNDRAD/C1 - GNDRAD inverted for radiometer comparison | twpgndrad60sC1.b1 |
D050221.2 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D050221.3 | TWP/GNDRAD/C3 - Reprocess: IRT with wrong calibration | twpgndrad60sC3.b1 |
D050504.2 | TWP/GNDRAD/C2 - IRT connector | twpgndrad60sC2.b1 |
D050815.1 | TWP/GNDRAD/C2 - IRT power supply failed | twpgndradC2.00, twpgndrad60sC2.b1 |
D050919.4 | TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacement | twpgndrad60sC3.b1 |
D050926.6 | TWP/GNDRAD/C2 - Gndrad inverted for radiometer | twpgndrad60sC2.b1 |
D051123.2 | TWP/GNDRAD/C1 - Gndrad inverted for comparison of radiometers | twpgndrad60sC1.b1 |
D051206.5 | TWP/GNDRAD/C3 - IRT malfunction | twpgndrad60sC3.b1 |
D060111.1 | TWP/GNDRAD/C3 - IRT power | twpgndrad60sC3.b1 |
D060509.1 | TWP/GNDRAD/C3 - IRT failed | twpgndrad60sC3.b1 |
D060630.34 | TWP/GNDRAD/C1 - Reprocess: Longwave Calibration error | twpgndrad60sC1.b1 |
D060630.35 | TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error | twpgndrad60sC2.b1 |
D060630.36 | TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error | twpgndrad60sC3.b1 |
D060823.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D070110.1 | TWP/GNDRAD/C2 - IRT signal | twpgndrad60sC2.b1 |
D070406.6 | TWP/GNDRAD/C2 - Reprocess: IRT calibration | twpgndrad60sC2.b1 |
D071001.4 | TWP/GNDRAD/C3 - Maintenance activities affected GNDRAD | twpgndrad20sC3.a0, twpgndrad60sC3.b1 |
D071204.1 | TWP/GNDRAD/C2 - Reprocessed: Incorrect calibration | twpgndrad20sC2.a0, twpgndrad60sC2.b1 |
D080121.2 | TWP/GNDRAD/C3 - Gndrad shutdown for tropical cylone | twpgndradC3.00, twpgndrad20sC3.a0, twpgndrad20sC3.a1, twpgndrad60sC3.b1 |
D081027.1 | TWP/GNDRAD/C1 - IRT power connector | twpgndrad60sC1.b1 |
D090702.1 | TWP/GNDRAD/C2 - IRT missing | twpgndrad60sC2.b1 |
D100604.2 | TWP/GNDRAD/C2 - IRT power failure | twpgndrad20sC2.a0, twpgndrad60sC2.b1 |
D981222.3 | TWP/GNDRAD/C1 - Incorrect dome calibration factor | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D990909.1 | TWP/GNDRAD/C2 - Instrument inverted for Calibration | twpgndradC2.00, twpgndrad20sC2.a1, twpgndrad60sC2.a1 |
D990909.3 | Cailbration interruption of data at TWP Nauru | twpgndradC2.00, twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/1998 | 0000 | 12/31/1998 | 2359 |
Subject: | TWP/C2/GNDRAD Net radiometer |
DataStreams: | twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
Description: | The discrepancy between the Net radiometer and the net flux calculated from the Eppleys ranged from about 10-15% at mid-day under clear sky conditions with the Net radiometer reporting the lower value. |
Measurements: | twpgndrad60sC2.b1:
twpgndrad60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1996 | 0000 | 07/27/1997 | 2359 |
Subject: | TWP/C1/GNDRAD Net Radiometer: Cracked dome |
DataStreams: | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | A crack in the up-looking radiometer dome was discovered on 970227. It is not known how long the dome was cracked. The dome was replaced with a spare, out of calibration unit, on 970227. There was not an obvious change in the instrument performance when the instrument was replaced. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1996 | 0000 | 11/30/1997 | 2359 |
Subject: | TWP/GNDRAD/C1 - Net Radiometer: Correction for negative net fluxes |
DataStreams: | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The Net radiometer seems to have a calibration problem and a poor cosine response. The Net radiometer consistently measures low relative to Net surface irradiance calculated from the SKYRAD and GNDRAD Eppleys around local noon. The relative discrepancy changes rapidly with sun angle and the two streams typically cross in mid-morning and mid-afternoon beyond which the Net radiometer reads high relative to the Eppleys. The net radiometer typically reports postive values for the net flux during the day and negative values at night. There are actually different calibration coefficients that must be applied for positive and negative fluxes. Currently, all data are processed by applying the positive flux coefficient. Consequently, the negative values are in error. The net flux, F, is obtained by simply applying the formula F = C*V where V is the measured voltage and C is the calibration factor. Therefore, negative fluxes can be corrected by multiplying the fluxes by the ratio of the negative calibration factor, C_neg to the postive factor C_pos, so the corrected flux for negative values is equal to F_neg = F*C_neg/C_pos where F is the flux value reported in the data files. Through 970227, the values for these calibration factors are F_pos = 9.26 and F_neg = 11.43. After 970227, the calibration factors are F_pos = 9.33 and F_neg = 11.6. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/1996 | 0000 | 02/27/1997 | 0659 |
Subject: | TWP/GNDRAD/C1 - PIR: Incorrect wiring |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | Data from the GNDRAD PIR is not valid for this period because of an incorrect connection to the data logger. Collection of good data from the PIR resumed on 970227 at 07Z. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/1998 | 0000 | 03/31/1999 | 2359 |
Subject: | TWP/GNDRAD/C1 - PIR and IRT: surface temperature comparison |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The GNDRAD continues to look nominally OK. The daily average irradiances are about what is expected. The comparison of the downward facing IRT and the calculated brightness temperature from the downward facing PIR show agreement within and average of about 0.5O C. About 19981206, the daily average agreement suddenly seems to have gotten better. We should note to monitor this in the next data package. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/1996 | 1400 | 02/28/1997 | 0000 |
Subject: | TWP/GNDRAD/C1 - PIR: Extended data gap |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The lines to the GNDRAD data logger were cut on December 2, 1996 at approximately 1400 GMT. No data was collected from GNDRAD until the lines were reconnected on December 12 at approximately 0200 GMT. The PIR was not reconnected properly, however, and data flow from that instrument did not resume until a RESET visit in February. Data flow for the PIR resumed on February 28, 1997. The IRT and Net radiometer appear to be operating as before, but without the downlooking PIR, we cannot perform any internal tests. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/23/1997 | 2000 | 02/24/1997 | 2300 |
Subject: | TWP/GNDRAD/C1 - PSP: Comparison test |
DataStreams: | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The GNDRAD PSP was turned upside-down for comparison with the SKYRAD PSPs. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/1996 | 1400 | 12/12/1996 | 0200 |
Subject: | TWP/GNDRAD/C1 - Extended data gap |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The lines to the GNDRAD data logger were cut on December 2, 1996 at approximately 1400 GMT. No data was collected from GNDRAD until the lines were reconnected on December 12 at approximately 0200 GMT. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/25/2001 | 0000 | 10/25/2001 | 0100 |
Subject: | TWP/GNDRAD/C1 - GNDRAD radiometer replacement |
DataStreams: | twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The GNDRAD radiometers were replaced 10/25/01 from 00:00 to 01:00. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/24/1998 | 0102 | 11/19/1998 | 2359 |
Subject: | TWP/C2 Installation |
DataStreams: | twpgndradC2.00, twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
Description: | The Nauru ARCS was installed during the period September-November 1998. Data were being collected by the end of October, but for the first several weeks of November, the site was undergoing considerable change, so data from that period should be used with caution. The official site dedication occured on November 20. Most on-site activity ended following the dedication so we will consider November 20 to be the beginning of the Nauru operations. The last members of the installation team left Nauru on November 24. |
Measurements: | twpgndradC2.00:
twpgndrad60sC2.b1:
twpgndrad60sC2.a1:
twpgndrad20sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/10/1996 | 0001 | 06/22/2000 | 2359 |
Subject: | TWP/C1 - Incorrect elevation reported in Manus Data |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1, twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | (From Bill Clements) We have been using 6m MSL as the station elevation of Momote (Manus). This was based on information posted near the station barometer in the Momote Weather Service Office. It turns out that the official WMO station elevation for Momote is 4m MSL and the upper air elevation is 5m MSL. All Manus instruments except the sonde station are at 4m MSL. The sonde launching station is at 5m MSL. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpsmet60sC1.b1:
twpgndrad20sC1.a1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/03/2000 | 2225 | 01/19/2000 | 2359 |
06/27/2000 | 0440 | 06/30/2000 | 2359 |
Subject: | TWP/GNDRAD/C2 - Calibration Check; GNDRAD instruments inverted |
DataStreams: | twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
Description: | During calibration check periods the gndrad instruments are inverted to compare with the skyrad pir and psp. |
Measurements: | twpgndrad60sC2.b1:
twpgndrad60sC2.a1:
twpgndrad20sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2003 | 1700 | 03/13/2003 | 2130 |
Subject: | TWP/GNDRAD/C1 - GNDRAD logger configured as SMET |
DataStreams: | twpgndradC1.00, twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | the configuration for the SMET was inadvertently loaded into the GNDRAD at Manus at 03/03/2003 17:00 GMT. This error was found and corrected on 03/13/2003 at 21:30 GMT. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
twpgndradC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/12/2003 | 2100 | 09/14/2003 | 1100 |
Subject: | TWP/GNDRAD/C2 - IRT problem |
DataStreams: | twpgndrad60sC2.b1 |
Description: | The GNDRAD IRT exhibited a positive bias compared to the PIR from 2100 to 0700 UTC each day. The problem was corrected by removing the signal cable, cleaning the contacts, and reconnecting the cable. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/16/2003 | 0000 | 09/23/2003 | 0000 |
Subject: | TWP/GNDRAD/C2 - Data unrepresentative during radiometer comparison |
DataStreams: | twpgndrad20sC2.a1, twpgndrad60sC2.a1 |
Description: | GNDRAD PIR and PSP were inverted during RESET radiometer comparison |
Measurements: | twpgndrad60sC2.a1:
twpgndrad20sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2003 | 0620 | 12/09/2003 | 1155 |
Subject: | TWP/GNDRAD/C1 -PIRdown and PSPdown Inverted for Comparison |
DataStreams: | twpgndradC1.00, twpgndrad20sC1.a1, twpgndrad60sC1.b1 |
Description: | PIRdown and PSPdown instruments inverted for comparison with calibrated instruments. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad20sC1.a1:
twpgndradC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2004 | 0230 | 04/08/2004 | 1200 |
04/12/2004 | 0600 | 04/27/2004 | 1400 |
05/08/2004 | 0300 | 05/15/2004 | 2200 |
05/27/2004 | 1100 | 06/09/2004 | 0000 |
12/29/2004 | 1100 | 01/06/2005 | 2300 |
Subject: | TWP/GNDRAD/C3 - IRT bias |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT behaved erratically, jumping frequently from reporting about 50 Wm^(-2) higher than the PIR for surface irradiance values to about 100Wm^(-2) lower than the PIR. Generally, the IRT measured lower surface temperatures than expected from the PIR. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2001 | 0000 | 10/26/2001 | 2359 |
Subject: | TWP/GNDRAD/C1 - RESET 14 activities |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | RESET14 activities may have affected data in in subtle ways during this period. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/2004 | 0200 | 09/28/2004 | 0115 |
Subject: | TWP/GNDRAD/C2 - inverted PIR and PSP |
DataStreams: | twpgndrad20sC2.a0 |
Description: | The Gndrad PIR and PSP were inverted for comparison testing and instrument replacement during this period. |
Measurements: | twpgndrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2004 | 0501 | 07/19/2004 | 0206 |
Subject: | TWP/GNDRAD/C2 - incorrect IRT calibration |
DataStreams: | twpgndrad60sC2.b1 |
Description: | When the GNDRAD data logger was upgraded, the calibration offset for the IRT was initially incorrect. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2004 | 0040 | 11/05/2004 | 2318 |
Subject: | TWP/GNDRAD/C1 - GNDRAD inverted for radiometer comparison |
DataStreams: | twpgndrad60sC1.b1 |
Description: | The GNDRAD PIR and PSP were inverted during this period for comparison with replacement instruments. |
Measurements: | twpgndrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/10/2004 | 0700 | 12/25/2004 | 0300 |
Subject: | TWP/GNDRAD/C3 - IRT bias |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT measured higher surface temperatures than expected from the PIR, even at night. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/17/2004 | 0000 | 11/19/2004 | 0105 |
Subject: | TWP/GNDRAD/C3 - Reprocess: IRT with wrong calibration |
DataStreams: | twpgndrad60sC3.b1 |
Description: | A spare IRT was installed that was not configured properly. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/27/2005 | 2330 | 04/03/2005 | 0240 |
Subject: | TWP/GNDRAD/C2 - IRT connector |
DataStreams: | twpgndrad60sC2.b1 |
Description: | The IRT had a problem with the connector of either the signal or power cable which produced an output of 0 volts equivalent to a measurement of 223K. The problem was corrected when the connectors were cleaned and tightened. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/11/2005 | 1648 | 08/16/2005 | 2230 |
Subject: | TWP/GNDRAD/C2 - IRT power supply failed |
DataStreams: | twpgndradC2.00, twpgndrad60sC2.b1 |
Description: | The IRT output dropped to its minimum output of 223 K (0 volts). It was determined the 24 V DC converter had failed. The converter was replaced on 16 August and the instrument began reporting normally again. The IRT data are unusable during the five day period when the DC converter was faulty. The GNDRAD (down-looking) IRT is used primarily for surface temperature. The PIR can be used for this purpose by inverting the IR flux equation, Flux = sigma*temperature^4 where sigma = 5.67x10-8 W/m^2K^4. But, unlike the IRT, the PIR measurement is strongly effected by the air temperature in addition to the surface temperature. At night, when the air temperature approaches the surface temperature, the PIR provides a good estimate of the surface temperature. During the day, however, the PIR tends to underestimate the ground temperature, particularly on sunny days. The magnitude of the underestimate can be estimated by evaluating periods when both instruments are operating but is typically on the order of 5-10C. |
Measurements: | twpgndrad60sC2.b1:
twpgndradC2.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2005 | 0030 | 08/05/2005 | 0200 |
08/09/2005 | 0000 | 08/09/2005 | 0200 |
Subject: | TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacement |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The tower at Darwin was brought down to test and replace the Gndrad PIR on 8/5/2005 and the PSP on 8/9/2005 |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2005 | 0152 | 09/23/2005 | 0115 |
Subject: | TWP/GNDRAD/C2 - Gndrad inverted for radiometer |
DataStreams: | twpgndrad60sC2.b1 |
Description: | Gndrad instruments PIR and PSP inverted for replacement instrument installation and comparison |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2005 | 2230 | 11/17/2005 | 0030 |
Subject: | TWP/GNDRAD/C1 - Gndrad inverted for comparison of radiometers |
DataStreams: | twpgndrad60sC1.b1 |
Description: | Radiometers GNDRAD PIR and PSP inverted for radiometer comparison |
Measurements: | twpgndrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2005 | 1500 | 12/05/2005 | 0100 |
Subject: | TWP/GNDRAD/C3 - IRT malfunction |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The internal IRT power supply failed (probably due to a lightning strike on 11/14) and was drawing excessive current on the data logger's DC system. The problem was corrected by replacing the instrument with a spare. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/20/2005 | 2330 | 01/02/2006 | 2300 |
Subject: | TWP/GNDRAD/C3 - IRT power |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT failed to report after a planned power outage to add lightning protection modules to the AC power wiring. The problem was corrected when a loose power connection to the logger was found, rectified, and power restored to the logger. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2006 | 0000 | 05/18/2006 | 2359 |
Subject: | TWP/GNDRAD/C3 - IRT failed |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT began to fail on 4/7/2006 and failed completely (apparently due to the internal power supply) on 4/27. It was replaced on 5/18. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2004 | 0700 | 12/21/2005 | 2204 |
Subject: | TWP/GNDRAD/C1 - Reprocess: Longwave Calibration error |
DataStreams: | twpgndrad60sC1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | twpgndrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2004 | 2202 | 12/21/2005 | 2149 |
Subject: | TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error |
DataStreams: | twpgndrad60sC2.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2004 | 0100 | 12/21/2005 | 2137 |
Subject: | TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error |
DataStreams: | twpgndrad60sC3.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2006 | 0000 | 06/27/2006 | 0344 |
Subject: | TWP/GNDRAD/C3 - IRT bias |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT reported higher surface temperatures than the PIR due to corrosion on the terminals of the lightning protection module and a ground wire error. The corrosion was cleaned and the wiring corrected. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/2006 | 0400 | 02/04/2007 | 2316 |
Subject: | TWP/GNDRAD/C2 - IRT signal |
DataStreams: | twpgndrad60sC2.b1 |
Description: | When the other GNDRAD radiometers were replaced on 12/3/2006, the quality of the IRT signal began to degrade until 12/26 when it became unusable. The instrument was replaced on 2/4/2007. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2007 | 2317 | 02/17/2007 | 0400 |
Subject: | TWP/GNDRAD/C2 - Reprocess: IRT calibration |
DataStreams: | twpgndrad60sC2.b1 |
Description: | The configuration of the IRT was set to that used at TWP/C3. This caused the calibration of the data to be wrong. It was corrected by reconfiguring the IRT to match the datalogger program. These data can be reprocessed and corrected by adding 10K, i.e. sfc_ir_temp(new) = sfc_ir_temp(old) + 10K. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2007 | 2330 | 09/18/2007 | 0722 |
09/18/2007 | 2320 | 09/19/2007 | 0150 |
09/19/2007 | 2333 | 09/20/2007 | 0055 |
Subject: | TWP/GNDRAD/C3 - Maintenance activities affected GNDRAD |
DataStreams: | twpgndrad20sC3.a0, twpgndrad60sC3.b1 |
Description: | While maintenance was performed on the SMET anenometer, the GNDRAD instruments were inverted. Disregard GNDRAD data during this time. |
Measurements: | twpgndrad20sC3.a0:
twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/25/2007 | 2202 | 11/30/2007 | 1724 |
Subject: | TWP/GNDRAD/C2 - Reprocessed: Incorrect calibration |
DataStreams: | twpgndrad20sC2.a0, twpgndrad60sC2.b1 |
Description: | The Gndrad PSP was changed out 11/25 but the datalogger program was not updated until 11/30. PSP #31293 installed 20071125.2202. Correct calibration coefficient = 123.46. Reprocessed to correct upwelling shortwave hemispheric irradiance (US) by: US(new) = (US(old) / 123.56 ) * 123.46 Reprocessing completed March 2008. |
Measurements: | twpgndrad60sC2.b1:
twpgndrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/03/2008 | 1000 | 01/07/2008 | 0515 |
Subject: | TWP/GNDRAD/C3 - Gndrad shutdown for tropical cylone |
DataStreams: | twpgndradC3.00, twpgndrad20sC3.a0, twpgndrad20sC3.a1, twpgndrad60sC3.b1 |
Description: | On Jan 3rd approximately 1000GMT the effects of a tropical cyclone started affecting the installed radiometer measurements at ARM/TWP/C3(Darwin) - both Skyrad and Gndrad. On Jan 4th 0740 GMT the Gndrad station was shutdown to avoid damage due to the close passing of this storm. Station was restarted Jan 7th 0515GMT. |
Measurements: | twpgndrad20sC3.a1:
twpgndrad20sC3.a0:
twpgndrad60sC3.b1:
twpgndradC3.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/24/2008 | 0100 | 11/03/2008 | 2330 |
Subject: | TWP/GNDRAD/C1 - IRT power connector |
DataStreams: | twpgndrad60sC1.b1 |
Description: | The power connector of the IRT broke due to corrosion. The instrument was replaced. |
Measurements: | twpgndrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/24/2009 | 2050 | 06/25/2009 | 2350 |
Subject: | TWP/GNDRAD/C2 - IRT missing |
DataStreams: | twpgndrad60sC2.b1 |
Description: | The 24 VDC power supply for the IRT failed. IRT data are missing and unrecoverable. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/17/2010 | 1434 | 04/20/2010 | 0335 |
Subject: | TWP/GNDRAD/C2 - IRT power failure |
DataStreams: | twpgndrad20sC2.a0, twpgndrad60sC2.b1 |
Description: | The DC-DC power converter failed and was replaced. |
Measurements: | twpgndrad60sC2.b1:
twpgndrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 1943 | 12/09/1998 | 0000 |
Subject: | TWP/GNDRAD/C1 - Incorrect dome calibration factor |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | The Manus GNDRAD PIR had an incorrect dome factor since installation. The following is an estimate by Chris Cornwall of the magnitude of the effect of this calibration error. The magnitude of this error is smaller than the calibration accuracy. "Processed the instantaneous data from ARCS2 (10, 30 and 50 seconds after the minute) using 4.32 as the dome factor, and also using 4.00 as the dome factor, as it should have been. The difference between the calculated irradiance results was negligible, as was expected with an instrument operating in the downward-facing direction. Over the three days from 11/06/98 to 11/08/98, the error between the two signals averaged 0.09%. Overnight values were much lower than this, daytime values peaked at 0.42%. The statistics for these error signals were as follows: average error 0.000895 standard dev 0.001119 max error 0.004242 min error -0.00064 We should change ARCS1 so it is using the correct value for the groundrad pir dome coefficient (4.0 instead of 4.32), and we may want to include a DQR stating these findings, although they are much smaller than the overall uncertainty of the PIR itself." |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpgndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/1999 | 0500 | 08/11/1999 | 2030 |
Subject: | TWP/GNDRAD/C2 - Instrument inverted for Calibration |
DataStreams: | twpgndradC2.00, twpgndrad20sC2.a1, twpgndrad60sC2.a1 |
Description: | The GNDRAD was inverted to look at the sky for comparison with other radiometers. |
Measurements: | twpgndradC2.00:
twpgndrad60sC2.a1:
twpgndrad20sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/07/1999 | 0415 | 08/07/1999 | 0600 |
Subject: | Cailbration interruption of data at TWP Nauru |
DataStreams: | twpgndradC2.00, twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndrad60sC2.b1 |
Description: | Data interrupted to perform electronic calibration of data logger |
Measurements: | twpgndradC2.00:
twpgndrad60sC2.b1:
twpgndrad60sC2.a1:
twpgndrad20sC2.a1:
|