SGP/SWATS/E18 - Planned data outage

The data quality was known to be very poor, so the instrument was taken offline until the 
sensors were reinstalled.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• altitude above sea levelaltunits(alt)
• Time offset from base_time(base_time)
• Volumetric Water Content, West Profile(watcont_W)
• Sensor Temperature Rise, East Profile(trise_E)
• north latitude for all the input platforms.(lat)
• Soil Water Potential, West Profile(soilwatpot_W)
• east longitude for all the input platforms.(lon)
• Soil Temperature, East Profile(tsoil_E)
• East profile sensor serial numbers(serial_numbers_E)
• Soil Water Potential, East Profile(soilwatpot_E)
• Sensor Depth below surface(depth)
• Sensor Temperature Rise, West Profile(trise_W)
• Soil Temperature, West Profile(tsoil_W)
• Volumetric Water Content, East Profile(watcont_E)
• Time offset of tweaks from base_time(time_offset)
• West profile sensor serial numbers(serial_numbers_W)
• Reference Thermistor Temperature(tref)

• Sensor Temperature Rise, East Profile(trise_E)
• north latitude for all the input platforms.(lat)
• Volumetric Water Content, West Profile(watcont_W)
• Reference Thermistor Temperature(tref)
• West profile sensor serial numbers(serial_numbers_W)
• Volumetric Water Content, East Profile(watcont_E)
• Time offset from base_time(base_time)
• Time offset of tweaks from base_time(time_offset)
• Soil Temperature, East Profile(tsoil_E)
• east longitude for all the input platforms.(lon)
• altitude above sea levelaltunits(alt)
• Soil Water Potential, West Profile(soilwatpot_W)
• Soil Temperature, West Profile(tsoil_W)
• Sensor Temperature Rise, West Profile(trise_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• East profile sensor serial numbers(serial_numbers_E)
• Sensor Depth below surface(depth)

• Time offset from base_time(base_time)
• altitude above sea levelaltunits(alt)
• Time offset of tweaks from base_time(time_offset)
• east longitude for all the input platforms.(lon)
• precipitation accumulated between outputs, 3-hr accumulation(precip)
• north latitude for all the input platforms.(lat)

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/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)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Sensor Depth below surface(depth)
• Soil Temperature, West Profile(tsoil_W)
• Soil Temperature, East Profile(tsoil_E)
• Time offset from 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)
• altitude above sea levelaltunits(alt)
• Sensor Temperature Rise, East Profile(trise_E)
• east longitude for all the input platforms.(lon)
• Reference Thermistor Temperature(tref)
• Soil Water Potential, West Profile(soilwatpot_W)
• Volumetric Water Content, East Profile(watcont_E)

SGP/SWATS/E18 - Incorrect and missing measurements

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.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Soil Temperature, East Profile(tsoil_E)
• Sensor Temperature Rise, East Profile(trise_E)
• east longitude for all the input platforms.(lon)
• north latitude for all the input platforms.(lat)
• altitude above sea levelaltunits(alt)
• Soil Water Potential, West Profile(soilwatpot_W)
• Volumetric Water Content, West Profile(watcont_W)
• Soil Temperature, West Profile(tsoil_W)
• Reference Thermistor Temperature(tref)
• Sensor Temperature Rise, West Profile(trise_W)
• West profile sensor serial numbers(serial_numbers_W)
• Soil Water Potential, East Profile(soilwatpot_E)
• Time offset from base_time(base_time)
• Volumetric Water Content, East Profile(watcont_E)
• East profile sensor serial numbers(serial_numbers_E)
• Sensor Depth below surface(depth)
• Time offset of tweaks from base_time(time_offset)

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/CO2/C1 - Reprocessing User Notes

Format Changes:
  To comply with archive standards, the name of the unlimited dimention variable in the 
cdf level b1 files was changed from 'record' to 'time'. This does not affect data quality.

• height of tower base from sea level(site_elevation)
• corrected sensible heat flux(h)
• latitude of instument location(site_latitude)
• mean value of IRGA pressure(mean_p)
• variance of variable c(var_c)
• start of integration interval(yyyydddhhmmss)
• mean sonic temperature (t), i.e. virtual temperature(mean_t)
• mean horizontal wind speed(mean_rot_u)
• Time offset of tweaks from base_time(time_offset)
• variance of variable q(var_q)
• rotated variance v(var_rot_v)
• fractional day of the year(doy)
• Vertical angle of wind(phi)
• rotated variance w(var_rot_w)
• Monin-Obukhov length scale(Lmoni)
• rotated variance u(var_rot_u)
• Unit Vector Wind Direction(wdir)
• friction velocity(ustar)
• additive WPL LE correction to c flux(fc_wpl_le)
• additive WPL H correction to c flux(fc_wpl_h)
• Time offset from base_time(base_time)
• rotation to zero w(theta)
• longitude of instument location(site_longitude)
• mean co2 concentration (c)(mean_c)
• height of instument from tower base(zm)
• variance of variable t(var_t)
• WPL corrected CO2 flux(fc_corr)
• mean water vapor concentration (q)(mean_q)
• WPL corrected latent heat flux(le)

• mean value of IRGA pressure(mean_p)
• variance of variable c(var_c)
• variance of variable t(var_t)
• WPL corrected latent heat flux(le)
• mean horizontal wind speed(mean_rot_u)
• Vertical angle of wind(phi)
• Monin-Obukhov length scale(Lmoni)
• variance of variable q(var_q)
• height of instument from tower base(zm)
• longitude of instument location(site_longitude)
• additive WPL LE correction to c flux(fc_wpl_le)
• mean sonic temperature (t), i.e. virtual temperature(mean_t)
• mean water vapor concentration (q)(mean_q)
• corrected sensible heat flux(h)
• additive WPL H correction to c flux(fc_wpl_h)
• start of integration interval(yyyydddhhmmss)
• Unit Vector Wind Direction(wdir)
• mean co2 concentration (c)(mean_c)
• rotated variance w(var_rot_w)
• Time offset from base_time(base_time)
• rotated variance u(var_rot_u)
• rotated variance v(var_rot_v)
• rotation to zero w(theta)
• WPL corrected CO2 flux(fc_corr)
• latitude of instument location(site_latitude)
• Time offset of tweaks from base_time(time_offset)
• friction velocity(ustar)
• height of tower base from sea level(site_elevation)
• fractional day of the year(doy)

• Time offset from base_time(base_time)
• Monin-Obukhov length scale(Lmoni)
• WPL corrected latent heat flux(le)
• variance of variable t(var_t)
• rotated variance u(var_rot_u)
• start of integration interval(yyyydddhhmmss)
• rotated variance v(var_rot_v)
• Vertical angle of wind(phi)
• Unit Vector Wind Direction(wdir)
• longitude of instument location(site_longitude)
• latitude of instument location(site_latitude)
• WPL corrected CO2 flux(fc_corr)
• height of instument from tower base(zm)
• variance of variable q(var_q)
• friction velocity(ustar)
• variance of variable c(var_c)
• additive WPL LE correction to c flux(fc_wpl_le)
• mean value of IRGA pressure(mean_p)
• rotated variance w(var_rot_w)
• mean sonic temperature (t), i.e. virtual temperature(mean_t)
• fractional day of the year(doy)
• mean co2 concentration (c)(mean_c)
• rotation to zero w(theta)
• mean horizontal wind speed(mean_rot_u)
• height of tower base from sea level(site_elevation)
• corrected sensible heat flux(h)
• additive WPL H correction to c flux(fc_wpl_h)
• mean water vapor concentration (q)(mean_q)
• Time offset of tweaks from base_time(time_offset)

• average of four lower soil moisture sensors(mean_m_soil_lower)
• standard error of mean_t_soil_middle note maximum of two values used in
  calculation(stderr_mean_t_soil_middle)
• average of two middle soil temperature sensors(mean_t_soil_middle)
• Time offset of tweaks from base_time(time_offset)
• corrected sensible heat flux(h)
• additive WPL H correction to c flux(fc_wpl_h)
• rotated variance v(var_rot_v)
• precipitation accumulated between outputs, 3-hr accumulation(precip)
• additive WPL LE correction to c flux(fc_wpl_le)
• rotated variance u(var_rot_u)
• rotation to zero w(theta)
• standard error of mean_t_soil_lower note maximum of two values used in
  calculation(stderr_mean_t_soil_lower)
• fractional day of the year(doy)
• WPL corrected CO2 flux(fc_corr)
• depth of soil heat flux probes(z_g_soil)
• height of radiation instruments(zrad)
• net solar radiation (NR-lite)(r_net)
• depth of lower m soil probesp(z_m_soil_lower)
• standard error of mean_m_soil_upper(stderr_mean_m_soil_upper)
• mean co2 concentration (c)(mean_c)
• height of lower RH/T sensor(z_lower)
• start of integration interval(yyyydddhhmmss)
• mean water vapor concentration (q)(mean_q)
• variance of variable c(var_c)
• depth of middle t soil probesm(z_t_soil_middle)
• height of instument from tower base(zm)
• photosynthetic photon flux density (PAR)(ppfd)
• barometric pressure(bar_pres)
• upwelling longwave hemispheric irradiance t_rad corrected(r_up_long_hemisp)
• latitude of instument location(site_latitude)
• mean air temperature, upper level(t_air_upper)
• average of two lower soil temperature sensors(mean_t_soil_lower)
• Unit Vector Wind Direction(wdir)
• standard error of mean_t_soil_upper note maximum of two values used in
  calculation(stderr_mean_t_soil_upper)
• mean horizontal wind speed(mean_rot_u)
• mean sonic temperature (t), i.e. virtual temperature(mean_t)
• upwelling shortwave hemispheric irradiance t_rad corrected(r_up_short_hemisp)
• mean relative humidity, lower level(rh_lower)
• mean air temperature, lower level(t_air_lower)
• rotated variance w(var_rot_w)
• WPL corrected latent heat flux(le)
• mean value of IRGA pressure(mean_p)
• downwelling shortwave hemispheric irradiance t_rad corrected(r_down_short_hemisp)
• friction velocity(ustar)
• Time offset from base_time(base_time)
• height of upper RH/T sensor(z_upper)
• height of tower base from sea level(site_elevation)
• variance of variable q(var_q)
• standard error of mean_g_soil(stderr_mean_g_soil)
• radiometer body temperature (for longwave correction)(t_rad)
• longitude of instument location(site_longitude)
• variance of variable t(var_t)
• downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)
• average of four upper soil moisture sensors(mean_m_soil_upper)
• average of up to four soil heat flux sensors(mean_g_soil)
• total downwelling shortwave radiation (LI-200 sensor)(r_tot)
• depth of upper t soil probesm(z_t_soil_upper)
• depth of upper m soil probesm(z_m_soil_upper)
• Vertical angle of wind(phi)
• depth of lower t soil probesm(z_t_soil_lower)
• mean relative humidity, upper level(rh_upper)
• standard error of mean_m_soil_lower(stderr_mean_m_soil_lower)
• average of two upper soil temperature sensors(mean_t_soil_upper)
• Monin-Obukhov length scale(Lmoni)

SGP/CO2/C1 - Reprocessing User Notes

A subset of the radiation measurements had an incorrect gain applied to raw data in period 
from 20021218-20031218.  To correct for this, a multiplicative correction factor of 1.11 
were applied to raw data used for the following variables:

r_down_short_hemisp
r_down_long_hemisp
r_up_short_hemisp
r_up_long_hemisp

Note that the long wave variables are computed by adding the black body thermal radiation 
from the radiometer body to each of the long wave signals.  Hence, the multiplicative 
correction is applied to the raw long wave fluxes before adding in the flux from the 
radiometer body.

• downwelling shortwave hemispheric irradiance t_rad corrected(r_down_short_hemisp)
• upwelling longwave hemispheric irradiance t_rad corrected(r_up_long_hemisp)
• upwelling shortwave hemispheric irradiance t_rad corrected(r_up_short_hemisp)
• downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)

SGP/CO2/C1 - Longwave Radiation Incorrect

Long wave radiation values (r_up_long_hemisp, r_down_long_hemisp) are bad 
due to correction with bad radiometer body temperature (t_rad) resulting
from a wiring issue.

• radiometer body temperature (for longwave correction)(t_rad)
• upwelling longwave hemispheric irradiance t_rad corrected(r_up_long_hemisp)
• downwelling longwave hemispheric irradiance t_rad corrected(r_down_long_hemisp)

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

• altitude above sea levelaltunits(alt)
• north latitude for all the input platforms.(lat)
• east longitude for all the input platforms.(lon)

• north latitude for all the input platforms.(lat)
• altitude above sea levelaltunits(alt)
• east longitude for all the input platforms.(lon)

• east longitude for all the input platforms.(lon)
• north latitude for all the input platforms.(lat)
• altitude above sea levelaltunits(alt)

SGP/CO2/C1 - Reprocessed: User Notes

Replacement of LI-200 sensor (total downwelling shortwave radiation, variable r_tot) by a 
new LI-190 sensor (upwelling photosynthetic photon flux density, variable ppfd_up).

The new LI-190 sensor was:
- installed on December 9, 2004. 
- being tested from December 9, 2004 to December 22, 2004.
- operational after December 22, 2004.

Consequently:
1. variable "r_tot" is filled with missing values (qc_r_tot = 1) after December 9, 2004,
2. variable "ppfd_up" is filled with missing values (qc_ppfd_up = 1) prior December 22, 
2004.

• photosynthetic photon flux density (PAR)(ppfd_up)
• total downwelling shortwave radiation (LI-200 sensor)(r_tot)

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.

• Sensor Depth below surface(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.

• Sensor Depth below surface(depth)

SGP/SWATS/E12  - 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.

• Sensor Depth below surface(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.

• Sensor Depth below surface(depth)

SGP/CO2/C1 - Soil Temperature measurements

Current data quality check (qc) procedure does not catch spikes in soil temperature 
measurements. A new qc procedure is being tested and will improve the current procedure.

• average of two lower soil temperature sensors(mean_t_soil_lower)
• average of two middle soil temperature sensors(mean_t_soil_middle)
• average of two upper soil temperature sensors(mean_t_soil_upper)