SGP/SWATS/E18 - Incorrect depth dimension

No sensors are installed at the 85cm, 125cm, and 175cm depths. All associated variables 
should be reported as "-9999".  Ignore spurious measurements.

• Volumetric Water Content, West Profile(watcont_W)
• Soil Temperature, West Profile(tsoil_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• Volumetric Water Content, East Profile(watcont_E)
• Sensor Temperature Rise, East Profile(trise_E)
• Soil Water Potential, West Profile(soilwatpot_W)
• Soil Temperature, East Profile(tsoil_E)

SGP/SWATS/E18 - Sensor failure, 5cm W

The sensor at the 5-cm depth on the West profile reported incorrect temperature rise 
values after the instrument was restarted on June 7, 2003.

• Volumetric Water Content, West Profile(watcont_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Soil Water Potential, West Profile(soilwatpot_W)

SGP/SWATS/E18 - Intermittent data

There is an erroneous measurement at 2052Z on the 11th. All obs should be disregarded and 
probably should be deleted from the file.

tsoil_W:
From 1007Z on the 7th to 1707Z on the 9th: tsoil_W data is missing or incorrect at the 5cm 
depth. From 1807 on the 9th to 1807 on the 10th, tsoil_W is completely missing and/or 
incorrect. From 1907 on the 10th to 2007 on the 11th, correct tsoil_W data is available 
except for missing data at the 15cm depth.

trise_W:
All trise_W data is incorrect or missing from 1007Z on the 7th to 1807Z on the 10th. From 
1907 on the 10th to 2007 on the 11th, trise_W data is missing at the 15cm depth.

tsoil_E:
From 1007 on the 7th to 1907 on the 9th, trise_E data is missing or incorrect except at 
the 5cm depth. From 2007 on the 9th to 1907 on the 10th, tsoil_E data is missing.

trise_E:
From 1007 on the 7th to 1907 on the 10th, trise_E data is missing or incorrect.

• Volumetric Water Content, West Profile(watcont_W)
• Soil Temperature, West Profile(tsoil_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• Volumetric Water Content, East Profile(watcont_E)
• Sensor Temperature Rise, East Profile(trise_E)
• Soil Water Potential, West Profile(soilwatpot_W)
• Soil Temperature, East Profile(tsoil_E)

SGP/SWATS/E19 - Unrecorded Precipitation

During this time period, the tipping bucket was obstructed and prevented from measuring 
precipitation, so any precipitation events will have erroneous measurements of 0. The 
obstruction is probably due to maintenance on 20030807 (YYYYMMDD) which resulted in erroneous 
recorded precipitation (nonzero) at 1450 GMT.

• Hourly precipitation(precip)

SGP/SWATS/E19 - Unrecorded Precipitation

During this time period, the tipping bucket was obstructed and prevented from measuring 
precipitation, so any precipitation events will have erroneous measurements of 0. The 
problem was corrected on 20040205 (YYYYMMDD) with erroneous recorded precipitation (nonzero) 
due to maintenance ending at 1551 GMT.

• Hourly precipitation(precip)

SGP/SWATS/E19 - Metadata Errors

The latitude, longitude and altitude of the El Reno (E19) site were
incorrectly entered into the ARM database.  The correct location
of the SWATS.E19 instrument is:
   Lat: 35.557N
   Lon: 98.017W
   Alt:    421m

• Dummy altitude for Zeb(alt)
• lon(lon)
• lat(lat)

• Dummy altitude for Zeb(alt)
• lon(lon)
• lat(lat)

• Dummy altitude for Zeb(alt)
• lat(lat)
• lon(lon)

SGP/SWATS/E12 - Time drift

The time synchronization server stopped working on Feb. 19th at 22:12:16 GMT.  The clock 
was corrected by -5600.177269 seconds on March 10th at 22:47 GMT. The recorded times for 
observations are off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds on 
March 10th.

• Hourly precipitation(precip)
• time(time)
• base time(base_time)
• Time offset of tweaks from base_time(time_offset)

• Reference Thermistor Temperature(tref)
• Soil Temperature, West Profile(tsoil_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)
• Sensor Temperature Rise, East Profile(trise_E)
• Time offset of tweaks from base_time(time_offset)
• Soil Water Potential, West Profile(soilwatpot_W)
• base time(base_time)
• Volumetric Water Content, East Profile(watcont_E)
• Soil Temperature, East Profile(tsoil_E)

SGP/SWATS/E22 - Duplicate records removed from data files

Due to a collection malfunction, the data for timestamps 163100
through 170000 were repeated in both the raw and cdf data sets.
The duplicate records were removed.

• null(Raw data stream - documentation not supported)

• Time offset of tweaks from base_time(time_offset)
• time(time)

SGP/SWATS/E10 - Reprocess: Changed Depth Dimension

The dimension "depth" in the netCDF files was incorrectly reported as 8, and has been 
changed. Newer files with the correct smaller depth dimension do not have extra placeholder 
values and thus are smaller in size.

• depth(depth)

SGP/SWATS/E12 - Reprocess: Changed Depth Dimension

The dimension "depth" in the netCDF files was incorrectly reported as 8, and has been 
changed. Newer files with the correct smaller depth dimension do not have extra placeholder 
values and thus are smaller in size.

• depth(depth)

SGP/SWATS/E12 - Incorrect soil moisture

Temperature rise values were way to high (~40 deg C).  Water potential is calculated from 
a rise (and subsequent drop) in temperature in the sensor that is normally ~1-5 degrees 
C.  When the temperature rise is too high, the soil moisture data is dubious at best and 
unusable at worst.  Since this "out-of-bounds" t_rise is so high, the soil moisture data 
are practically unusable.

Soil temperature measurements were not affected.

• Soil Water Potential, West Profile(soilwatpot_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)
• Volumetric Water Content, East Profile(watcont_E)
• Sensor Temperature Rise, East Profile(trise_E)

SGP/SWATS/E10 - Incorrect soil moisture

All temperature rise values were incorrect.  Soil moisture variables were also incorrect 
due to the incorrect T-rise values.  Soil temperature measurements were not affected.

• Volumetric Water Content, East Profile(watcont_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Volumetric Water Content, West Profile(watcont_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Sensor Temperature Rise, East Profile(trise_E)
• Soil Water Potential, West Profile(soilwatpot_W)

SGP/SWATS/E12 - Reprocess: Incorrect calibrations

Incorrect data configuration program was loaded on logger resulting in incorrect 
coefficients applied.  Data will be reprocessed with correct coefficients.

• Reference Thermistor Temperature(tref)
• Soil Temperature, West Profile(tsoil_W)
• Soil Water Potential, West Profile(soilwatpot_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)
• Volumetric Water Content, East Profile(watcont_E)
• Soil Temperature, East Profile(tsoil_E)
• Sensor Temperature Rise, East Profile(trise_E)

SGP/SWATS/E19 - Sensor failure, 60cm E

The 60cm East profile sensor began reporting temperature rise values near 0 C. This 
problem continued until the old profile of sensors was disconnected and the new set of sensors 
was connected. The soil temperature measure was not impacted by this problem.

• Volumetric Water Content, East Profile(watcont_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Temperature Rise, East Profile(trise_E)

SGP/SWATS/E19 - Sensor failure, 125 W

Temperature rise values form the 125 cm West profile sensor began reporting values near 0 
C. This problem continued until the old profile of sensors was disconnected and the new 
set of sensors was connected. The soil temperature measure was not impacted by this problem.

• Soil Water Potential, West Profile(soilwatpot_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)

SGP/SWATS/E19 - Failed sensor, 35cm E

Temperature rise and soil temperature from the 35cm East profile sensor began to report as 
-9999.  This problem continued until the old profile of sensors was disconnected and the 
new set of sensors was connected.

• Volumetric Water Content, East Profile(watcont_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Soil Temperature, East Profile(tsoil_E)
• Sensor Temperature Rise, East Profile(trise_E)

SGP/SWATS/E19 - Sensor failure, 15cm W

Temperature rise and soil temperature from the 15cm West profile sensor began to report as 
-9999.  This problem continued until the old profile of sensors was disconnected and the 
new set of sensors was connected.

• Soil Water Potential, West Profile(soilwatpot_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)
• Soil Temperature, West Profile(tsoil_W)

SGP/SWATS/E16 - Sensor failure, 125cm E

The 125cm East sensor reported temperature rise values at or about 0 for the duration of 
the specified period.

Soil temperature data were not affected.

• Volumetric Water Content, East Profile(watcont_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Temperature Rise, East Profile(trise_E)

SGP/SWATS/E10 - Incorrect calibrations

After a power outage, an older version of the datalogger program was accidently installed 
on the SWATS, resulting in improperly calibrated soilwatpot and watcont values from all 
levels in both profiles for this time period.

• Volumetric Water Content, East Profile(watcont_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Volumetric Water Content, West Profile(watcont_W)
• Soil Water Potential, West Profile(soilwatpot_W)