SGP/EBBR/E27 - Soil Moisture #5 Insensitive

Soil moisture sensor #5 was insensitive and put out a value of around 30%.

Sensible and latent heat fluxes were not significantly affected by this
small error.

• Soil heat capacity 5(cs5)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• soil heat flow, site 5(g5)
• volumetric soil moisture, site 5(sm5)

SGP/EBBR/E27 - Loose Tair Left Connections

Tair left dropped out at times. When this occurred, the sensible and latent heat fluxes 
are incorrect.

Tightening of the electronic connections to the datalogging equipment
appears to have solved the problem.

• bottom air temperature(tair_bot)
• top air temperature(tair_top)

• bottom air temperature(tair_bot)
• h(h)
• latent heat flux(e)
• top air temperature(tair_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)

• Left air temperature(tair_l)

SGP/EBBR/E27 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• Bottom humidity(hum_bot)
• Temperature of bottom humidity sensor chamber(thum_bot)
• top air temperature(tair_top)
• Top humidity(hum_top)
• bottom vapor pressure(vp_bot)
• top vapor pressure(vp_top)
• bottom air temperature(tair_bot)
• Temperature of the top humidity chamber(thum_top)

• Temperature of the top humidity chamber(thum_top)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• top air temperature(tair_top)
• latent heat flux(e)
• top vapor pressure(vp_top)
• Bottom humidity(hum_bot)
• bottom vapor pressure(vp_bot)
• bottom air temperature(tair_bot)
• h(h)
• Top humidity(hum_top)
• Temperature of bottom humidity sensor chamber(thum_bot)

• Right air temperature(tair_r)
• Temperature of right humidity sensor chamber(rr_thum_r)
• Left air temperature(tair_l)
• Left relative humidity(mv_hum_l)
• Right relative humidity(mv_hum_r)
• Temperature of left humidity sensor chamber(rr_thum_l)

SGP/EBBR/E27 - Soil Moisture #5 Incorrect

The wrong CR10 program loaded from the storage module on 9/15/04.  During the previous 
change of program, an attempt was made to store the new program in the storage module; site 
ops techs did not notice that this attempt failed, leaving the old program in the storage 
module.  When power was cyled on 9/15/04, the old program with flat sm5 coefficients 
loaded into the CR10.  The "flat" coefficients resulted in the sm5 soil moisture hovering 
around 30%.

15 minute raw sm5 resistances were correct.

Average soil heat flow, sensible heat flux, and latent heat flux were not
significantly affected and so are not included in the list of incorrect measurements.

• volumetric soil moisture, site 5(sm5)

SGP/EBBR/E27 - SM2 Coefficients Incorect

Soil Moisture #2 coefficients in the CR10 datalogger program were incorrect during the 
time
that an old program version was installed.

• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• volumetric soil moisture, site 2(sm2)
• Soil heat capacity 2(cs2)
• soil heat flow, site 2(g2)
• 0-5 cm change in soil heat storage with time, site 2(ces2)

• Soil moisture 2(r_sm2)

SGP/EBBR/E27 - Improved EBBR CR10 Program

Effective 20050330.1730, the EBBR.E27 CR10 program was revised to improve 
the quality of the primary measurements as follows:
   
1) An RMS procedure is used to determine max and min limits of acceptable
soil heat flow.  This is applied to the individual soil sets.  Measurements
outside the limits are rejected and the measurements within the limits are
used to calculate the average soil heat flow.
   
2) Max and min limits are used to determine incorrect values of net
radiation, sensible heat flux (h), latent heat flux (e), and automatic
exchange mechanism (AEM) signal.  If AEM signal is outside the limits, h 
and e are set to 999s.  If net radiation is outside the limits, h and e are 
set to 999s. If h or e are outside the limits, h and e are set to 999s.
   
Virtually no incorrect soil measurement will affect the primary 
measurements of h and e.
   
By setting h and e to 999s, it can be easily seen that the primary 
variables are incorrect; no other interpretation is possible.
   
Prior to 20050330, the improved CR10 program was NOT in effect.  DQRs have
been submitted for known instances of incorrect soil measurements which
affected the quality of the primary measurements of h and e.
   
Note: the DQR begin date is the begin date of the sgp30ebbrE27.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE27.a1).

• average surface soil heat flow(ave_shf)
• h(h)
• latent heat flux(e)

SGP/EBBR/E27 - metadata corrections

On 20050816, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E27 data collected by ARM back to the installation of the 
instrument in May 2003. Please see the current metadata for correct information.  These 
changes do not affect data values or quality.	

The changes are summarized below:
1) Update of "sensor location" information
2) Addition of installation dates for the systems
3) Correction of soil moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)