Data Quality Reports for Session: 150865 User: zhe1feng1 Completed: 06/13/2013


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000302.1TWP/SMET/C1 - Reprocess: Skewed wind direction 1 datatwpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC1.00
D000504.5TWP/SMET/C1 - Wind Direction alignment methodtwpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC1.00
D000621.1TWP/SMET/C1 - Incorrect calibration for ARCS1 Wind speedtwpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC1.00, twpsmetC1.00
D000718.11TWP/SMET/C1 - Periodic spikes in temperature and water vapor pressuretwpsmet60sC1.b1, twpsmet60sC1.a1
D000718.12TWP/SMET/C1 - Elevated relative humiditytwpsmet60sC1.b1, twpsmet60sC1.a1
D010709.15TWP/SMET/C1 - Wind speed calibration errorstwpsmet60sC1.a1, twpsmet60sC1.b1
D011211.3TWP/SMET/C1 - precip, wind, temperaturetwpsmet60sC1.a1, twpsmet60sC1.b1
D020214.9TWP/SMET/C1 - Sensor replacementtwpsmet60sC1.a1, twpsmet60sC1.b1
D020329.8TWP/SMET/C1/C2 - Switch to new Data Header Formats not timelytwpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC2.a1, twpsmet60sC2.b1
D020620.61TWP/C1 - Incorrect elevation reported in Manus Datatwpgndrad60sC1.a1, twpsmet60sC1.b1, twpgndrad20sC1.a1, twpgndrad60sC1.b1, twpsmet60sC1.a1
D030227.3TWP/SMET/C1 - Reprocess: Miscalibrated windspeed2 datatwpsmet60sC1.a1, twpsmet60sC1.b1
D030317.1TWP/SMET/C1 - Reprocess: Lower Wind Speed incorrecttwpsmet60sC1.a1, twpsmet60sC1.b1
D031215.3TWP/SMET/C1 - Tower Lowered for Cal Activitiestwpsmet60sC1.b1, twpsmetC1.00
D040428.1TWP/SMET/C1 - Poor Performing Sensortwpsmet60sC1.b1
D040813.11TWP/SMET/C1 - RESET14 activitiestwpsmet60sC1.a1, twpsmet60sC1.b1
D040824.3TWP/SMET/C1 - Incorrect rainrate equation usedtwpsmet60sC1.b1
D050421.6TWP/SMET/C1 - Negative rainfall ratestwpsmet60sC1.b1
D060522.1TWP/SMET/C1 - Upper wind sensor failuretwpsmet60sC1.b1
D061011.2TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge addedtwpsmet60sC1.b1
D070409.1TWP/SMET/C1 - Upper winds failuretwpsmet60sC1.b1
D080428.2TWP/SMET/C1 - Reprocess: ORG Data has very small rainrate valuestwpsmet60sC1.b1
D080707.2TWP/SMET/C1 - ORG Precip Data Incorrecttwpsmet60sC1.b1
D080922.3TWP/SMET/C1 - Missing datatwpsmet60sC1.b1
D081022.3TWP/SMET/C1 - Wind Speed data contain offset due to induced voltagetwpsmet60sC1.b1
D090304.1TWP/SMET/C1 - Optical Rain Gage Inoperativetwpsmet60sC1.b1
D090708.1TWP/SMET/C1 - Reprocess: Barometric pressure data scaled incorrectlytwpsmet60sC1.b1
D100603.1TWP/SMET/C1 - Missing RH, Barometer, and ORG datatwpsmet60sC1.b1
D110105.1TWP/SMET/C1 - Aux (lower) wind sensor failedtwpsmet60sC1.b1
D980416.33TWP/SMET/C1 - Surface pressure spiketwpsmet60sC1.b1
D990910.2Calibration interruption at TWP Naurutwpsmet60sC1.a1, twpsmet60sC1.b1, twpsmetC2.00


DQRID : D000302.1
Start DateStart TimeEnd DateEnd Time
10/24/1999000011/25/19990450
Subject:
TWP/SMET/C1 - Reprocess: Skewed wind direction 1 data
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC1.00
Description:
Wind direction 1 data is incorrect. 
Manus SMET wind direction for Wind-1 (upper unit) was apparently skewed
from its original position as a result of checking direction calibration. 

As near as we can tell the position of the sensor was rotated clockwise
Somewhere in the range of 45-90 degrees, most likely in steps 22.5 degrees.

Data comparison performed on 3-2-00, using a small amount of data from 
this instrument.
Measurements:twpsmet60sC1.00:
  • Raw data stream - documentation not supported

twpsmet60sC1.b1:
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)

twpsmet60sC1.a1:
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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DQRID : D000504.5
Start DateStart TimeEnd DateEnd Time
11/25/1999045004/02/20000000
Subject:
TWP/SMET/C1 - Wind Direction alignment method
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC1.00
Description:
During RESET10 we discovered a problem with wind direction from WIND1 (upper
anemometer).  During RESET8, WIND1 was corrected by rotating the alignment
ring instead of the anemometer.  This resulted in a better agreement between
the 2 anemometers, but is not the correct way to align an anemometer. The
alignment ring was readjusted for true north and the anemometer reset in
the proper slot (the original problem).
Measurements:twpsmet60sC1.00:
  • Raw data stream - documentation not supported

twpsmet60sC1.b1:
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)

twpsmet60sC1.a1:
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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DQRID : D000621.1
Start DateStart TimeEnd DateEnd Time
10/23/1999000004/01/20002359
Subject:
TWP/SMET/C1 - Incorrect calibration for ARCS1 Wind speed
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC1.00, twpsmetC1.00
Description:
On 23 OCT 99, during Reset 8, an incorrect slope of was entered for the 
upper, windspeed1, wind speed sensor resulting in a 1% overestimate of
the wind speed.  The correct calibration was entered on 1 APR 2000 during
RESET 10.
Measurements:twpsmet60sC1.00:
  • Raw data stream - documentation not supported

twpsmet60sC1.b1:
  • wind1_spd_sd
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #1 speed minimum(wind1_spd_min)

twpsmet60sC1.a1:
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • wind1_spd_sd
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #1 speed maximum(wind1_spd_max)

twpsmetC1.00:
  • Raw data stream - documentation not supported


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DQRID : D000718.11
Start DateStart TimeEnd DateEnd Time
02/12/1998000005/01/19980000
Subject:
TWP/SMET/C1 - Periodic spikes in temperature and water vapor pressure
DataStreams:twpsmet60sC1.b1, twpsmet60sC1.a1
Description:
Beginning on 980212 (day #43) spikes began to occur in the surface
temperature and water vapor pressure.  These spikes occur approximately
once per hour (the spacing is very regular but occasionally an hour
is skipped).  In the one-minute averaged data, the temperature spike
lasts for only one minute and dips approximately 4-5 C below the actual
temperature.  The one-minute standard deviation is more dramatic, rising
from about 0.1 to about 35.  The one minute temperature minimum is the
most easily identifiable, each hour when the spike occurs, the minimum
is -245.84.  The vapor pressure mean jumps from about 30 to over 50 and
the standard deviation jumps from less than 1 to more than 200.  This
problem was fixed by the RESET team on 980501.
Measurements:twpsmet60sC1.b1:
  • Temperature minimum(temp_min)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • vappress_sd
  • Vapor pressure mean(vappress_mean)
  • temp_sd
  • Temperature maximum(temp_max)

twpsmet60sC1.a1:
  • temp_sd
  • vappress_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Vapor pressure mean(vappress_mean)
  • Temperature maximum(temp_max)
  • Temperature minimum(temp_min)


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DQRID : D000718.12
Start DateStart TimeEnd DateEnd Time
11/16/1998000008/12/19990000
Subject:
TWP/SMET/C1 - Elevated relative humidity
DataStreams:twpsmet60sC1.b1, twpsmet60sC1.a1
Description:
The relative humidity has been exceeding 100% with unusual regularity.
The most dramatic case occured on December 31 when the RH exceeded 100%
for 18 hours and exceeded 103.5% for 6 hours with a maximum value of
103.8%.  A PIF was submitted to propose changing this sensor. This change
occurred on August 12, 1999.
Measurements:twpsmet60sC1.b1:
  • Relative humidity mean(relh_mean)
  • Relative humidity minimum(relh_min)
  • relh_sd
  • Relative humidity maximum(relh_max)

twpsmet60sC1.a1:
  • Relative humidity mean(relh_mean)
  • Relative humidity minimum(relh_min)
  • Relative humidity maximum(relh_max)
  • relh_sd


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DQRID : D010709.15
Start DateStart TimeEnd DateEnd Time
10/25/1996000003/02/19992359
Subject:
TWP/SMET/C1 - Wind speed calibration errors
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1
Description:
Wind speed calibration factors were reversed between wind speed sensors 1 (upper) and 2 
(lower). Results in less than 1% error, but correction factors may be used.

To correct wind speed #1 (upper) add 0.03 m/s.
To correct wind speed #2 (lower) subtract 0.03 m/s.
Measurements:twpsmet60sC1.b1:
  • lo_spd_max
  • up_spd_max
  • lo_spd_vec_avg
  • lo_spd_min
  • up_spd_sd
  • up_spd_arith_avg
  • up_spd_min
  • lo_spd_arith_avg
  • up_spd_vec_avg
  • lo_spd_sd

twpsmet60sC1.a1:
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Wind #1 speed minimum(wind1_spd_min)
  • wind1_spd_sd
  • wind2_spd_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)


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DQRID : D011211.3
Start DateStart TimeEnd DateEnd Time
10/23/2001044510/23/20010645
Subject:
TWP/SMET/C1 - precip, wind, temperature
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1
Description:
On 10/23/01 from 4:45 to 6:45 precipitation, wind, and temperature measurements were 
directly affected by RESET14 visit activities.
Measurements:twpsmet60sC1.b1:
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation maximum(precip_max)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Precipitation minimum(precip_min)
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #2 speed maximum(wind2_spd_max)
  • Temperature minimum(temp_min)
  • wind1_spd_sd
  • wind1_dir_sd
  • precip_sd
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • temp_sd
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Temperature maximum(temp_max)
  • Precipitation mean(precip_mean)
  • wind2_dir_sd
  • wind2_spd_sd
  • Wind #1 speed maximum(wind1_spd_max)

twpsmet60sC1.a1:
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • temp_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #2 speed maximum(wind2_spd_max)
  • Temperature minimum(temp_min)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #2 speed minimum(wind2_spd_min)
  • wind2_spd_sd
  • Precipitation maximum(precip_max)
  • Wind #1 speed maximum(wind1_spd_max)
  • Precipitation mean(precip_mean)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • precip_sd
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Wind #1 speed minimum(wind1_spd_min)
  • wind1_spd_sd
  • wind2_dir_sd
  • Temperature maximum(temp_max)
  • Precipitation minimum(precip_min)
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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DQRID : D020214.9
Start DateStart TimeEnd DateEnd Time
10/24/2001004010/24/20010100
Subject:
TWP/SMET/C1 - Sensor replacement
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1
Description:
On 10/24/01 from 00:40 to 01:00 the T/RH probe was being replaced.
Measurements:twpsmet60sC1.b1:
  • Temperature minimum(temp_min)
  • Relative humidity mean(relh_mean)
  • Relative humidity minimum(relh_min)
  • temp_sd
  • Relative humidity maximum(relh_max)
  • Temperature maximum(temp_max)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • relh_sd

twpsmet60sC1.a1:
  • temp_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • relh_sd
  • Temperature minimum(temp_min)
  • Relative humidity mean(relh_mean)
  • Relative humidity minimum(relh_min)
  • Relative humidity maximum(relh_max)
  • Temperature maximum(temp_max)


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DQRID : D020329.8
Start DateStart TimeEnd DateEnd Time
03/31/2001235904/01/20010020
Subject:
TWP/SMET/C1/C2 - Switch to new Data Header Formats not timely
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC2.a1, twpsmet60sC2.b1
Description:
On April 1, 2001 at 00:00:00 new data header with consistent variable naming conventions, 
etc were to be used for all sites, all data streams.  At the TWP sites the time of the 
movement to the new convention did not occur precisely at 00:00:00.  The following data 
files contain between 40 seconds and 20 minutes of data from 4/1/02 in the old format.  The 
delayed format change did not affect data quality in any way.

twpsmet60sC1.a1.20010401.000001.cdf
twpsmet60sC1.b1.20010401.000001.cdf
twpsmet60sC2.a1.20010401.000000.cdf
twpsmet60sC2.b1.20010401.000000.cdf
Measurements:twpsmet60sC2.b1:
  • lo_dir_vec_avg
  • lo_spd_vec_avg
  • up_spd_min
  • up_spd_max
  • Mean Air Temperature or Hardware Error(temp_mean)
  • relh_sd
  • temp_sd
  • internal_voltage
  • Barometric Pressure(atmos_pressure)
  • up_spd_vec_avg
  • Precipitation mean(precip_mean)
  • base_time
  • logger_temp
  • Precipitation maximum(precip_max)
  • lon
  • up_dir_vec_avg
  • precip_sd
  • lo_dir_sd
  • Precipitation minimum(precip_min)
  • vappress_sd
  • Vapor pressure mean(vappress_mean)
  • tbrg_count_total
  • up_spd_arith_avg
  • time_offset
  • lat
  • lo_spd_min
  • tbrg_total
  • lo_spd_max
  • lo_spd_arith_avg
  • up_dir_sd
  • lo_spd_sd
  • alt
  • time
  • Relative humidity mean(relh_mean)
  • up_spd_sd

twpsmet60sC1.b1:
  • up_dir_sd
  • up_spd_max
  • logger_temp
  • time_offset
  • up_spd_min
  • Mean Air Temperature or Hardware Error(temp_mean)
  • lo_spd_sd
  • up_spd_sd
  • tbrg_count_total
  • lon
  • lo_dir_vec_avg
  • Precipitation maximum(precip_max)
  • relh_sd
  • internal_voltage
  • base_time
  • lo_spd_min
  • Relative humidity mean(relh_mean)
  • precip_sd
  • tbrg_total
  • temp_sd
  • Vapor pressure mean(vappress_mean)
  • up_spd_vec_avg
  • up_dir_vec_avg
  • lat
  • lo_spd_max
  • Barometric Pressure(atmos_pressure)
  • up_spd_arith_avg
  • lo_spd_arith_avg
  • lo_spd_vec_avg
  • Precipitation minimum(precip_min)
  • time
  • alt
  • vappress_sd
  • Precipitation mean(precip_mean)
  • lo_dir_sd

twpsmet60sC1.a1:
  • Mean Air Temperature or Hardware Error(temp_mean)
  • lat
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • vappress_sd
  • relh_sd
  • time_offset
  • Vapor pressure mean(vappress_mean)
  • bit_data
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • temp_sd
  • Wind #2 speed maximum(wind2_spd_max)
  • internal_voltage
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • alt
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • external_voltage
  • wind1_spd_sd
  • Wind #1 speed minimum(wind1_spd_min)
  • wind2_dir_sd
  • Temperature maximum(temp_max)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Barometric Pressure(atmos_pressure)
  • Temperature minimum(temp_min)
  • Wind #2 speed minimum(wind2_spd_min)
  • lon
  • Precipitation maximum(precip_max)
  • Wind #1 speed maximum(wind1_spd_max)
  • Precipitation mean(precip_mean)
  • precip_sd
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation minimum(precip_min)
  • logger_temp
  • Relative humidity mean(relh_mean)
  • Relative humidity maximum(relh_max)
  • wind2_spd_sd
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • base_time
  • Relative humidity minimum(relh_min)
  • wind1_dir_sd

twpsmet60sC2.a1:
  • Precipitation mean(precip_mean)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • wind2_spd_sd
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • temp_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • precip_sd
  • time_offset
  • Temperature maximum(temp_max)
  • internal_voltage
  • Wind #2 speed minimum(wind2_spd_min)
  • Barometric Pressure(atmos_pressure)
  • vappress_sd
  • Relative humidity minimum(relh_min)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • lat
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Precipitation minimum(precip_min)
  • Temperature minimum(temp_min)
  • Wind #2 speed maximum(wind2_spd_max)
  • alt
  • bit_data
  • wind1_spd_sd
  • logger_temp
  • wind1_dir_sd
  • base_time
  • relh_sd
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Relative humidity mean(relh_mean)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Relative humidity maximum(relh_max)
  • Wind #1 speed minimum(wind1_spd_min)
  • lon
  • Precipitation maximum(precip_max)
  • wind2_dir_sd
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #1 speed maximum(wind1_spd_max)
  • Vapor pressure mean(vappress_mean)
  • external_voltage


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DQRID : D020620.61
Start DateStart TimeEnd DateEnd Time
10/10/1996000106/22/20002359
Subject:
TWP/C1 - Incorrect elevation reported in Manus Data
DataStreams:twpgndrad60sC1.a1, twpsmet60sC1.b1, twpgndrad20sC1.a1, twpgndrad60sC1.b1, twpsmet60sC1.a1
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:
  • alt

twpgndrad60sC1.a1:
  • alt

twpsmet60sC1.b1:
  • alt

twpgndrad20sC1.a1:
  • alt

twpsmet60sC1.a1:
  • alt


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DQRID : D030227.3
Start DateStart TimeEnd DateEnd Time
10/15/2002000002/27/20031100
Subject:
TWP/SMET/C1 - Reprocess: Miscalibrated windspeed2 data
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1
Description:
A replacement anemometer (WSP2) was installed but the new anemometer calibration 
coefficients were not put into the logger. The multiplication factor was 0.09708 when it should 
have been 0.09763 (very small difference)the offset was 0.36 when it should have been 0.3 
(a difference 0.06 m/s).
Measurements:twpsmet60sC1.b1:
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #2 speed maximum(wind2_spd_max)

twpsmet60sC1.a1:
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)


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DQRID : D030317.1
Start DateStart TimeEnd DateEnd Time
02/27/2003175003/03/20031900
Subject:
TWP/SMET/C1 - Reprocess: Lower Wind Speed incorrect
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1
Description:
The lower wind speed sensor (sensor #2) was reporting values 10 times above the actual 
value.  During an update to the logger configuration file the calibration multiplier was 
incorrectly entered.  The multiplier inserted was .97630 when it should have been .09763.  
This caused the readings from this sensor to be incorrect.
Measurements:twpsmet60sC1.b1:
  • lo_spd_max
  • lo_spd_vec_avg
  • lo_spd_min
  • lo_spd_arith_avg
  • lo_spd_sd

twpsmet60sC1.a1:
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • wind2_spd_sd
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #2 speed vector average(wind2_spd_vec_avg)


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DQRID : D031215.3
Start DateStart TimeEnd DateEnd Time
12/01/2003230012/02/20030300
Subject:
TWP/SMET/C1 - Tower Lowered for Cal Activities
DataStreams:twpsmet60sC1.b1, twpsmetC1.00
Description:
Tower lowered for instrument calibration
Measurements:twpsmet60sC1.b1:
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Relative humidity minimum(relh_min)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation maximum(precip_max)
  • Relative humidity maximum(relh_max)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Precipitation minimum(precip_min)
  • Wind #1 speed minimum(wind1_spd_min)
  • relh_sd
  • Wind #2 speed minimum(wind2_spd_min)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • Wind #2 speed maximum(wind2_spd_max)
  • Temperature minimum(temp_min)
  • Relative humidity mean(relh_mean)
  • vappress_sd
  • wind1_spd_sd
  • wind1_dir_sd
  • precip_sd
  • temp_sd
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Temperature maximum(temp_max)
  • Precipitation mean(precip_mean)
  • wind2_dir_sd
  • wind2_spd_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Vapor pressure mean(vappress_mean)

twpsmetC1.00:
  • Raw data stream - documentation not supported


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DQRID : D040428.1
Start DateStart TimeEnd DateEnd Time
04/23/2004000001/19/20051530
Subject:
TWP/SMET/C1 - Poor Performing Sensor
DataStreams:twpsmet60sC1.b1
Description:
On 4/23/2004 condensation was found inside the target area of the ORG lens. A spare was 
sent and installed but did not solve the problem of high background voltage values causing 
rainrate values to be recorded during no rainfall.  Values range anywhere from 0.06 to 
0.12 mm/hr.  

A new Optical Rain Gage was installed on 01/19/2005 @ 13:30 GMT alleviating the high 
background voltage values that lead to consistent rainfall rates of around 0.11 to 0.15 mm/hr 
on a consistent basis.  

The formula used to calculate rainfall rates from the new Optical Rain Gage is:  RR 
(mm/hr) = 25(V^1.87) - 0.15.

Older model formula = 20(V^2) - 0.05

The two formulas result in comparable data.
Measurements:twpsmet60sC1.b1:
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D040813.11
Start DateStart TimeEnd DateEnd Time
10/09/2001000010/26/20012359
Subject:
TWP/SMET/C1 - RESET14 activities
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1
Description:
RESET14 activities may have affected data in subtle ways during this
period.
Measurements:twpsmet60sC1.b1:
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • Relative humidity maximum(relh_max)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • wind1_dir_sd
  • Barometric Pressure(atmos_pressure)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Temperature maximum(temp_max)
  • wind2_spd_sd
  • wind2_dir_sd
  • Wind #1 speed maximum(wind1_spd_max)
  • Relative humidity minimum(relh_min)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation maximum(precip_max)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Precipitation minimum(precip_min)
  • relh_sd
  • Wind #2 speed minimum(wind2_spd_min)
  • Temperature minimum(temp_min)
  • wind1_spd_sd
  • Relative humidity mean(relh_mean)
  • vappress_sd
  • precip_sd
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • temp_sd
  • Precipitation mean(precip_mean)
  • Vapor pressure mean(vappress_mean)

twpsmet60sC1.a1:
  • Barometric Pressure(atmos_pressure)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Temperature minimum(temp_min)
  • Wind #2 speed minimum(wind2_spd_min)
  • Precipitation maximum(precip_max)
  • Wind #1 speed maximum(wind1_spd_max)
  • Precipitation mean(precip_mean)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • precip_sd
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • vappress_sd
  • relh_sd
  • Vapor pressure mean(vappress_mean)
  • Precipitation minimum(precip_min)
  • temp_sd
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Relative humidity mean(relh_mean)
  • Relative humidity maximum(relh_max)
  • wind2_spd_sd
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Relative humidity minimum(relh_min)
  • wind1_spd_sd
  • Wind #1 speed minimum(wind1_spd_min)
  • wind2_dir_sd
  • Temperature maximum(temp_max)
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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DQRID : D040824.3
Start DateStart TimeEnd DateEnd Time
08/03/2004030708/17/20042138
Subject:
TWP/SMET/C1 - Incorrect rainrate equation used
DataStreams:twpsmet60sC1.b1
Description:
There are two different Optical Raingages in use at the TWP sites.  The incorrect equation 
was used at this site.  The incorrect equation is (25*(V^1.87)) - 0.15.
The correct equation is (20*(V^2)) - 0.05.  The correct equation was installed.
Measurements:twpsmet60sC1.b1:
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D050421.6
Start DateStart TimeEnd DateEnd Time
10/09/1996000003/09/20042243
Subject:
TWP/SMET/C1 - Negative rainfall rates
DataStreams:twpsmet60sC1.b1
Description:
Due to limitations of the Zeno dataloggers all voltage measurements
from the optical rain gauge (ORG) were converted to rainfall rates. 
This resulted in negative values for rain rates.  Any value below 0.10 mm/hr should be 
considered to be 0 mm/hr.  New dataloggers 
alleviated this problem.  New loggers were installed 03/09/2004 @ 2243 GMT.
Measurements:twpsmet60sC1.b1:
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D060522.1
Start DateStart TimeEnd DateEnd Time
05/09/2006000010/14/20060237
Subject:
TWP/SMET/C1 - Upper wind sensor failure
DataStreams:twpsmet60sC1.b1
Description:
The upper wind speed sensor was binding at low wind speeds.  Comparison to the lower wind 
sensor showed that the upper sensor flat-lines for long periods of time.  The upper 
anemometer was replaced.
Measurements:twpsmet60sC1.b1:
  • up_dir_sd
  • up_spd_max
  • up_spd_sd
  • up_dir_vec_avg
  • up_spd_vec_avg
  • up_spd_arith_avg
  • up_spd_min


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DQRID : D061011.2
Start DateStart TimeEnd DateEnd Time
10/09/1996000010/17/20060000
Subject:
TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added
DataStreams:twpsmet60sC1.b1
Description:
A tipping bucket rain gauge was added to the TWP.C1 SMET suite of instruments on 20061017. 
 Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC1.b1 datastream.  Between 9/26 and 10/17, 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 19961009-20060926 and data from 
19961009-20061017 will be filled with -9999 (missing).
Measurements:twpsmet60sC1.b1:
  • base_time


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DQRID : D070409.1
Start DateStart TimeEnd DateEnd Time
03/19/2007000006/12/20070406
Subject:
TWP/SMET/C1 - Upper winds failure
DataStreams:twpsmet60sC1.b1
Description:
The upper wind instrument was inoperative resulting in constant wind direction and speed.  
A failed cable was replaced.
Measurements:twpsmet60sC1.b1:
  • up_dir_sd
  • up_spd_max
  • up_spd_sd
  • up_dir_vec_avg
  • up_spd_vec_avg
  • up_spd_arith_avg
  • up_spd_min


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DQRID : D080428.2
Start DateStart TimeEnd DateEnd Time
08/01/2004000006/30/20102359
Subject:
TWP/SMET/C1 - Reprocess: ORG Data has very small rainrate values
DataStreams:twpsmet60sC1.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 are reprocessing the data to remove these small 
values and are adjusting the collection program to remove them before ingest.
Measurements:twpsmet60sC1.b1:
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D080707.2
Start DateStart TimeEnd DateEnd Time
02/07/2008130002/09/20080600
Subject:
TWP/SMET/C1 - ORG Precip Data Incorrect
DataStreams:twpsmet60sC1.b1
Description:
Moisture intrusion into the sensor body allowed condensation on the lens of the ORG.  
Continual and long-term precipitation was reported during this time.
Measurements:twpsmet60sC1.b1:
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D080922.3
Start DateStart TimeEnd DateEnd Time
10/27/2002085910/31/20020114
08/16/2002092908/22/20020315
10/31/2000191411/02/20000032
11/05/2000051711/07/20002333
10/24/2000160110/26/20002332
10/18/2000132610/20/20000014
10/15/2000182310/17/20000016
03/18/2000202503/22/20001629
06/17/2000072906/21/20002226
08/09/2000230508/11/20001542
08/12/2000155208/14/20001807
09/03/1999033209/10/19990406
10/01/1999093210/18/19990000
03/13/2000094403/15/20001533
06/04/1997055306/11/19970653
Subject:
TWP/SMET/C1 - Missing data
DataStreams:twpsmet60sC1.b1
Description:
Data are missing and unrecoverable.
Measurements:twpsmet60sC1.b1:
  • up_dir_sd
  • lo_spd_vec_avg
  • up_spd_max
  • lo_dir_vec_avg
  • logger_temp
  • Precipitation maximum(precip_max)
  • up_dir_vec_avg
  • time_offset
  • up_spd_min
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Precipitation minimum(precip_min)
  • time
  • relh_sd
  • internal_voltage
  • lat
  • alt
  • lo_spd_sd
  • base_time
  • lo_spd_max
  • lo_spd_min
  • Relative humidity mean(relh_mean)
  • vappress_sd
  • up_spd_sd
  • Barometric Pressure(atmos_pressure)
  • tbrg_count_total
  • precip_sd
  • up_spd_arith_avg
  • tbrg_total
  • temp_sd
  • Precipitation mean(precip_mean)
  • lo_spd_arith_avg
  • lon
  • lo_dir_sd
  • Vapor pressure mean(vappress_mean)
  • up_spd_vec_avg


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DQRID : D081022.3
Start DateStart TimeEnd DateEnd Time
10/09/1996000011/03/20080730
Subject:
TWP/SMET/C1 - Wind Speed data contain offset due to induced voltage
DataStreams:twpsmet60sC1.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:twpsmet60sC1.b1:
  • lo_spd_max
  • up_spd_max
  • lo_spd_vec_avg
  • lo_spd_min
  • lo_spd_arith_avg
  • up_spd_sd
  • up_spd_vec_avg
  • up_spd_arith_avg
  • up_spd_min
  • lo_spd_sd


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DQRID : D090304.1
Start DateStart TimeEnd DateEnd Time
02/07/2009010004/03/20090225
Subject:
TWP/SMET/C1 - Optical Rain Gage Inoperative
DataStreams:twpsmet60sC1.b1
Description:
Beginning on 02/07/2009, the trending between the TBRG and ORG began to look poor, one 
recording precip when the other was not and vice versa.  After a while the ORG quit 
registering any precip at all.  ORG was replaced.
Measurements:twpsmet60sC1.b1:
  • Precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D090708.1
Start DateStart TimeEnd DateEnd Time
07/06/2009231907/07/20091348
Subject:
TWP/SMET/C1 - Reprocess: Barometric pressure data scaled incorrectly
DataStreams:twpsmet60sC1.b1
Description:
The barometer data was scaled incorrectly when a new program was loaded into the 
datalogger.  The pressure data was reported as mb (hPa) instead of the standard kPa.  So, in 
essence the value was a factor of ten to large.
Measurements:twpsmet60sC1.b1:
  • Barometric Pressure(atmos_pressure)


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DQRID : D100603.1
Start DateStart TimeEnd DateEnd Time
03/02/2010000005/11/20100330
Subject:
TWP/SMET/C1 - Missing RH, Barometer, and ORG data
DataStreams:twpsmet60sC1.b1
Description:
Atmos_pressure data suddenly went missing on 03/02 at 07:34 UTC and consequently, the 
relative humidity data flatlined. 

Furthermore, after a sudden precipitation event when the max precip rate flag was tripped 
the TBRG total has not agreed with the comparison ORG or the precip rate plot. 

A loose wire connection was fixed 3/22 restoring RH and barometer data.  A damaged cable 
was repaired 5/11 restoring ORG data.
Measurements:twpsmet60sC1.b1:
  • Relative humidity mean(relh_mean)
  • Precipitation minimum(precip_min)
  • relh_sd
  • Barometric Pressure(atmos_pressure)
  • Precipitation maximum(precip_max)
  • precip_sd
  • Precipitation mean(precip_mean)


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DQRID : D110105.1
Start DateStart TimeEnd DateEnd Time
07/05/2010000008/29/20100154
Subject:
TWP/SMET/C1 - Aux (lower) wind sensor failed
DataStreams:twpsmet60sC1.b1
Description:
The lower wind direction sensor on the C1 site was flatlining at 270 degrees throughout 
most of the daylight hours of the day. During the night the sensor appeared to be working 
fine.
Measurements:twpsmet60sC1.b1:
  • lo_spd_max
  • lo_spd_vec_avg
  • lo_spd_min
  • lo_spd_arith_avg
  • lo_dir_vec_avg
  • lo_dir_sd
  • lo_spd_sd


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DQRID : D980416.33
Start DateStart TimeEnd DateEnd Time
09/04/1997024909/04/19970304
Subject:
TWP/SMET/C1 - Surface pressure spike
DataStreams:twpsmet60sC1.b1
Description:
A spike occured in the surface pressure.  The reported pressure rose as
high as 1300 hPa but returned to normal levels after 15 minutes.
Measurements:twpsmet60sC1.b1:
  • Barometric Pressure(atmos_pressure)


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DQRID : D990910.2
Start DateStart TimeEnd DateEnd Time
08/09/1999003008/11/19990300
Subject:
Calibration interruption at TWP Nauru
DataStreams:twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmetC2.00
Description:
Occasional calibration interuption occured while calibration SMET instruments
Measurements:twpsmet60sC1.b1:
  • logger_temp
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • time_offset
  • Relative humidity maximum(relh_max)
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Wind #1 speed minimum(wind1_spd_min)
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #1 direction vector average(wind1_dir_vec_avg)
  • external_voltage
  • lat
  • wind1_dir_sd
  • Barometric Pressure(atmos_pressure)
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • Temperature maximum(temp_max)
  • wind2_spd_sd
  • wind2_dir_sd
  • bit_data
  • Wind #1 speed maximum(wind1_spd_max)
  • lon
  • filename
  • Relative humidity minimum(relh_min)
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • Precipitation maximum(precip_max)
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • Precipitation minimum(precip_min)
  • relh_sd
  • Wind #2 speed minimum(wind2_spd_min)
  • internal_voltage
  • alt
  • base_time
  • Temperature minimum(temp_min)
  • wind1_spd_sd
  • vappress_sd
  • Relative humidity mean(relh_mean)
  • precip_sd
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • temp_sd
  • Precipitation mean(precip_mean)
  • Vapor pressure mean(vappress_mean)

twpsmetC2.00:
  • Raw data stream - documentation not supported

twpsmet60sC1.a1:
  • Barometric Pressure(atmos_pressure)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Temperature minimum(temp_min)
  • Wind #2 speed minimum(wind2_spd_min)
  • lon
  • Precipitation maximum(precip_max)
  • lat
  • Wind #1 speed maximum(wind1_spd_max)
  • Precipitation mean(precip_mean)
  • Wind #2 speed maximum gust(wind2_spd_max_gust)
  • precip_sd
  • Wind #1 speed maximum gust(wind1_spd_max_gust)
  • vappress_sd
  • relh_sd
  • time_offset
  • Vapor pressure mean(vappress_mean)
  • Precipitation minimum(precip_min)
  • logger_temp
  • bit_data
  • temp_sd
  • Wind #2 speed arithmetic average(wind2_spd_arith_avg)
  • internal_voltage
  • Wind #2 speed maximum(wind2_spd_max)
  • Wind #1 speed arithmetic average(wind1_spd_arith_avg)
  • Relative humidity mean(relh_mean)
  • Relative humidity maximum(relh_max)
  • wind2_spd_sd
  • alt
  • Wind #2 direction vector average(wind2_dir_vec_avg)
  • filename
  • Wind #1 speed vector average(wind1_spd_vec_avg)
  • base_time
  • external_voltage
  • Wind #2 speed vector average(wind2_spd_vec_avg)
  • Relative humidity minimum(relh_min)
  • Wind #1 speed minimum(wind1_spd_min)
  • wind1_spd_sd
  • wind2_dir_sd
  • Temperature maximum(temp_max)
  • wind1_dir_sd
  • Wind #1 direction vector average(wind1_dir_vec_avg)


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END OF DATA