SGP/EBBR/E18 - Pressure Low

Pressure readings suddenly dropped to unrealistic levels.

Sensible Heat Flux was underestimated and Latent Heat Flux
was overestimated because of this problem.

• Retrieved pressure profile(pres)

• Retrieved pressure profile(pres)
• latent heat flux(e)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• h(h)

SGP/EBBR/E18 - Soil Temperature and Moisture Probes in Set #1 Spiked Outputs

Soil moisture #1 and soil temperature #1 occasionally spiked at the same time.  

Little sensible and latent heat flux data were affected.

• 0-5 cm integrated soil temperature, site 2(ts1)
• latent heat flux(e)
• soil heat flow, site 1(g1)
• h(h)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• volumetric soil moisture, site 1(sm1)

SGP/EBBR/E18 - Soil Temperature #2 Incorrect

Soil Temperature #2 was incorrect during the indicated period.  Average soil heat flow, 
sensible heat flux, and latent heat flux are incorrect, as a result.

• soil heat flow, site 2(g2)
• latent heat flux(e)
• Soil heat capacity 2(cs2)
• h(h)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 0-5 cm integrated soil temperature, site 2(ts2)
• average surface soil heat flow(ave_shf)

SGP/EBBR/E18 - 6 Month Checks

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

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

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

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

SGP/EBBR/E18 - Improved EBBR CR10 Program

Effective 20050330.0000, the EBBR.E18 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 sgp30ebbrE18.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE18.a1).

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

SGP/EBBR/E18 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E18 data collected by ARM back to the installation of the 
instrument in July 1997. 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 type
4) Correction of soil moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)