SGP/SWATS/E1 - Reprocess: Wrong Calibration

Two sensor connections were switched. The East 125-cm sensor was plugged into the East 
85-cm sensor's connection, and vice versa. Technicians corrected the problem on 1440 GMT, 
08/02/00, and returned the instrument to service 10 minutes later at 1450 GMT. As the 
datalogger was confusing the 2 sensors, incorrect calibrations were applied.

The correct calibrations can be applied to the raw data to obtain the correct temperature 
rises, soil moisture, etc. However, this is a rather large amount of work to apply toward 
just 1 measurement profile.  This has been identified as a medium priority reprocessing 
task.

• Soil Temperature, East Profile(tsoil_E)
• East profile sensor serial numbers(serial_numbers_E)
• Sensor Temperature Rise, East Profile(trise_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Volumetric Water Content, East Profile(watcont_E)

• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Temperature Rise, East Profile(trise_E)
• East profile sensor serial numbers(serial_numbers_E)
• Soil Temperature, East Profile(tsoil_E)
• Volumetric Water Content, East Profile(watcont_E)

• null(Raw data stream - documentation not supported)

SGP/SWATS/E4 - Incorrect soil moisture data

The temperature rise readings on both the east and west profiles are too high.  This also 
causes the matric potential and water content data to be incorrect.

For the first, third and fourth date ranges, measurements are incorrect for all sensor 
locations (each depth on both profiles).

For the second date range, measurements are incorrect for the lowest 8 sensor locations 
(the 60cm, 85cm, 125cm, and 175cm depths on both profiles).

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

SGP/SWATS/E24 - Bad soil temperature and moisture measurements

During the specified time range, soil temperature measurements ("tsoil") were normal
except for 3 sensors: 5-west, 60-west, 60-east.

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

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.

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

SGP/SWATS/E24 - Missing data

All soil temperature, soil moisture, and soil-water
potential measurements within the time range are 
missing. Archived files contain no useful data.
Removal of the files from May17'03 to June13'03 from the
archive will be requested.

• West profile sensor serial numbers(serial_numbers_W)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• depth(depth)
• Soil Temperature, West Profile(tsoil_W)
• Soil Temperature, East Profile(tsoil_E)
• base time(base_time)
• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)
• East profile sensor serial numbers(serial_numbers_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Dummy altitude for Zeb(alt)
• Sensor Temperature Rise, East Profile(trise_E)
• lon(lon)
• Reference Thermistor Temperature(tref)
• Soil Water Potential, West Profile(soilwatpot_W)
• Volumetric Water Content, East Profile(watcont_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.

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

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

SGP/SWATS/E3 - Incorrect Soil Moisture Data

The temperature rise readings from all depths on both the east and west profilesare 
incorrect. This also causes the matric potential and water content data to be incorrect.

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

SGP/SWATS/E5 - Sensor failure, 25cm E

The temperature rise readings from the 25-cm depth on the east profile are incorrect. This 
also causes the matric potential and water content data to be incorrect.

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

SGP/SWATS/E27 - Incorrect Soil Moisture Data

The temperature rise readings from all depths on both the east and west profiles (trise_E, 
trise_W) are incorrect. This also causes the matric potential (soilwatpot_E, 
soilwatpot_W) and water content (watcont_E, watcont_W) data to be incorrect.

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

• Raw data stream - documentation not supported(raw)

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/E4 - Sensor failures, 5cm and 15cm W

The temperature rise readings from the 15-cm depth on the west profile were incorrect from 
20040212:1500 to 20040217:0800. This also caused the matric potential and water content 
data for the 15-cm depth to be incorrect.

The temperature rise readings from the 5-cm depth on the west profile were incorrect from 
20040217:2300 to 20040218:1900. This also caused the matric potential and water content 
data for the 5-cm depth to be incorrect.

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

SGP/SWATS/E7 - Sensor failure, 35cm E

The 35cm East profile data spiked out of range on 20040106. Soil temperature is incorrect 
at 0407 GMT, and all 35cm E data are incorrect at 0407 and 0507 GMT.

The 35cm East profile sensor failed on 20040127 around 1300 GMT. All data from this sensor 
are incorrect or missing until 20040208.

The 35cm East temperature rise readings were noisy and inconsistent with the rest of the 
data 20040317-20040623. This also caused the matric potential and water content data to be 
suspect.

The 35cm East soil temperature measurements were incorrect beginning 20041223 to 9:07 on 
12/24. Temperature rise, soil-water potential, and water content are incorrect from from 
the same start time to 11:07 GMT on 12/24.

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

SGP/SWATS/E24 - Incorrect Soil Moisture Data

The temperature rise readings from all depths on both the east and west profiles (trise_E, 
trise_W) are incorrect. This also causes the matric potential (soilwatpot_E, 
soilwatpot_W) and water content (watcont_E, watcont_W) data to be incorrect.

• null(Raw data stream - documentation not supported)

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

SGP/SWATS/E1 - Incorrect Soil Moisture Data, 5cm E

The temperature rise readings from the 5-cm depth on the east profile (trise_E) were 
incorrect. This also caused the matric potential (soilwatpot_E) and water content (watcont_E) 
data for the 5-cm depth to be incorrect.

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

SGP/SWATS/E8 - Sensor failure, 15cm E

The temperature rise readings from the 15-cm depth on the east profile are incorrect. This 
also causes the matric potential and water content data to be incorrect.

• Sensor Temperature Rise, East Profile(trise_E)
• Volumetric Water Content, East Profile(watcont_E)
• Soil Water Potential, East Profile(soilwatpot_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 
problem was corrected on 20040205 (YYYYMMDD) with erroneous recorded precipitation (nonzero) 
due to maintenance ending at 1551 GMT.

• Hourly precipitation(precip)

SGP/SWATS/E24 - Incorrect Soil Moisture Data

The temperature rise readings from both the west and east profiles
(trise_W, trise_E) were incorrect at all depths. This also caused the
matric potential (soilwatpot_W, soilwatpot_E) and water content
(watcont_W, watcont_E) data to be incorrect.

• null(Raw data stream - documentation not supported)

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

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)
• lat(lat)
• lon(lon)

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

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

SGP/SWATS/E24 - Incorrect Soil Temp and Moisture Data

The soil temperature and temperature rise readings from all depths on both the east and 
west profiles (tsoil_W, tsoil_E, trise_E, trise_W) were incorrect. This also caused the 
matric potential (soilwatpot_E, soilwatpot_W) and water content (watcont_E, watcont_W) data 
to be incorrect.

• null(Raw data stream - documentation not supported)

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

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.

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

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

SGP/SWATS/E7 - Missing Data

Data are missing and unrecoverable.

• Soil Temperature, West Profile(tsoil_W)
• Volumetric Water Content, West Profile(watcont_W)
• depth(depth)
• Sensor Temperature Rise, East Profile(trise_E)
• West profile sensor serial numbers(serial_numbers_W)
• East profile sensor serial numbers(serial_numbers_E)
• Volumetric Water Content, East Profile(watcont_E)
• Soil Temperature, East Profile(tsoil_E)
• Sensor Temperature Rise, West Profile(trise_W)
• Reference Thermistor Temperature(tref)
• lat(lat)
• Soil Water Potential, West Profile(soilwatpot_W)
• lon(lon)
• Soil Water Potential, East Profile(soilwatpot_E)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• Time offset of tweaks from base_time(time_offset)

SGP/SWATS/E20 - Incorrect Soil Moisture Data

Due to failure of an electronic component (apparently caused by the onset of 
precipitation), the temperature rise readings from both the west and east profiles (trise_W, trise_E) 
are incorrect at all depths. This also causes the matric potential (soilwatpot_W, 
soilwatpot_E) and water content (watcont_W, watcont_E) data to be incorrect.

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

• null(Raw data stream - documentation not supported)

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/E24 - Incorrect Soil Moisture Data

All soil moisture data are incorrect (trise, soilwatpot, and watcont).

• null(Raw data stream - documentation not supported)

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

SGP/SWATS/E27 - Reprocess: Incorrect calibrations

The calibration coefficients for the 5-cm sensor on the East profile are
incorrect. This is causing incorrect soil water content (watcont_E) to be
reported.

• Volumetric Water Content, East Profile(watcont_E)

SGP/SWATS/E5 - Sensor failure, 35cm E

The sensor at the 35-cm depth on the east profile reported missing values for a couple of 
weeks.

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

SGP/SWATS/E1 - Questionable Soil Moisture Data

Between the 06GMT and 07GMT measurements on January 14th, it appears that some sort of 
non-atmospheric moisture source affected the 4 shallowest sensors (5-cm West & East, 15-cm 
West & East). No precipitation was recorded at the site, but data indicate a sharp 
increase in soil moisture that caused suspicious behavior that gradually lessened through 
January 23rd. Animal intrusion, but more probably adolescent mischief, is suspected.

Be aware that the soil moisture responses on January 14th most likely are not due to 
natural causes. For the remainder of the period, soil moisture measurements at 5cm and 15cm 
may be adversely affected.

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

SGP/SWATS/E20 - 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/E24 - 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/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/E13 - 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/E9 - Incorrect reference temperature

The reference temperature was incorrect resulting in incorrect results for soil moisture 
measurements.

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

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

SGP/SWATS/E5 - Incorrect soil moisture data

The temperature rise values were too high (> 20 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 T_rise is too high, the soil moisture data is dubious at best and unusable 
at worst.

Soil temperatures are OK.

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

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

SGP/SWATS/E3 - Sensor failure, 60cm E

The temperature rise readings from the 60-cm depth on the east profile (trise_E) were 
incorrect.  This problem also causes the matric potential (soilwatpot_E) and water content 
(watcont_E) data for the 60-cm depth to be incorrect.  The sensor began to behave 
erratically at 7:00 GMT on 07/10/2008 before an apparent failure at 10:00 GMT on 08/07/2008.  
Maintenance on 10/29 corrected the problem.

Values of tsoil_E at the 60 cm depth are not impacted by this problem.

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

SGP/SWATS/E16 - Incorrect soil moisture

Sensors for all levels in both profiles were reporting values of temperature rise at or 
near 0 C.  The incorrect values of temperature rise result in incorrect soil moisture data.

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

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

SGP/SWATS/E20 - Sensor failure, 5cm E

The temperature rise readings from the 5-cm depth on the east profile are incorrect. This 
also causes the matric potential and water content data for the 5-cm depth to be 
incorrect. The soil temperature measurements were not affected.

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

SGP/SWATS/E15 - Incorrect soil moisture

At 20:00 GMT on 05/07/08, temperature rise data from ALL sensors on both profiles began 
reporting values of temperature change near 0 C. These incorrect values of temperature rise 
result in incorrect soil moisture data for all sensors. 

Soil temperature data are unaffected.

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

SGP/SWATS/E5 - Sensor failure, 5cm E

The temperature rise on 5cm E profile are incorrect (> MAX QC test) beginning 20070623. 
This also causes the matric potential and water content data to be incorrect.

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

SGP/SWATS/E5 - Sensor failure, 175cm E

The temperature rise of the 175-cm East profile began reporting as incorrect with values 
near 0 C. This also caused the matric potential and water content data to be incorrect.

On 10/28/08, a broken wire was fixed and data came back online.

Soil temperature data was unaffected.

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

SGP/SWATS/E7 - Soil temperature irregular, 125cm E

The 125 cm E sensor was demonstrating temporal irregularities in its soil temperature 
measurements.  These irregularities consisted of dips and increases of around 2-4 C that 
typically started around 14:00 or 15:00 GMT on most days. On other days the values appeared 
somewhat noisy throughout the day. In both cases, the temporal changes did not compare 
well with the other sensors installed at E7.  

A bad fiber optic cable was replaced.

• Soil Temperature, East Profile(tsoil_E)

SGP/SWATS/E10 - Soil temperature irregular, 25cm W

The 25 cm W sensor was demonstrating temporal irregularities and were noisy at times.  
These irregularities consisted of dips and increases of around 2-4 C that typically started 
around 14:00 or 15:00 GMT on most days. On other days the values appeared somewhat noisy 
throughout the day. In both cases, the temporal changes did not compare well with the 
other sensors installed at E10.

A broken wire was repaired for 25cm W sensor.

• Soil Temperature, West Profile(tsoil_W)

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.

• Sensor Temperature Rise, West Profile(trise_W)
• Volumetric Water Content, West Profile(watcont_W)
• Soil Water Potential, West Profile(soilwatpot_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 Temperature, East Profile(tsoil_E)
• Sensor Temperature Rise, East Profile(trise_E)
• Soil Water Potential, East Profile(soilwatpot_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.

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

SGP/SWATS/E20 - Sensor failure, 15cm E

The temperature rise readings from the 15-cm depth on the east profile were incorrect (0 
or -9999) This also caused the matric potential and water content data for the 15-cm depth 
to be incorrect.

Soil temperature data measurements also failed 20060502.  No data from this sensor should 
be used at or beyond this date.

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

SGP/SWATS/E20 - Sensor failures

Following a period of missing values (-9999) from 08/05/05-08/17/05, sensors at several 
depths failed.

Temperature rise values from the 60cm West and 85cm East profile sensors were very noisy 
after 08/17/05. These data, including matric potential and water content, were incorrect.

Temperature rise values from the 85cm West and 125cm East profile sensors are reported as 
0 after 08/17/05. Matric potential and water content data for these sensor were also 
incorrect.  Soil temperatures for these depths were unaffected.

Temperature rise and soil temperature measurements for the 60cm East and 125cm West 
profile sensors were reported as 0 or -9999 after 08/17/05. Matric potential and water content 
data for these sensors were also incorrect.

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

SGP/SWATS/E27 - Incorrect serial numbers

The wiring at E27 from the Campbell Scientific 229-L sensors is backwards. This issue 
impacts the following variables but does not impact data quality: serial_numbers_W, 
serial_numbers_E.

All serial numbers stored in the serial_numbers_W variable apply to data stored in the 
trise_E and tsoil_E variables, and vice versa.  Thus, the user should be aware that the 
trise_W, trise_E, tsoil_W, and tsoil_E variables actually contain data from the opposite 
profile.

• East profile sensor serial numbers(serial_numbers_E)
• West profile sensor serial numbers(serial_numbers_W)

SGP/SWATS/E27 - Reprocess: Miscalibration

The wiring at E27 from the Campbell Scientific 229-L sensors is backwards. Matric 
potential and water content data are incorrect due to incorrect calibrations being applied to 
temperature rise sensor data.

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

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.

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

SGP/SWATS/E20 - Incorrect soil moisture data

After 12/20/2007, temperature rise values for all sensors (still operational at the time) 
were much too high, on the order of 10's of degrees C. Matric potential and water content 
data for these sensors were also incorrect.

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

SGP/SWATS/E8 - Sensor failure, 15cm W

The 15cm West profile sensor was not producing reasonable values of matric potential or 
water content.  Site ops found and tighten a loose wire.

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

SGP/SWATS/E8 - Incorrect soil moisture

Sensors in both profiles and at all depths were not being heated properly (temperature 
rise is too small). As a result, all matric potential and water content data are invalid 
also.

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