SGP/EBBR/E27  -  E27 EBBR Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) 
in 30EBBR

The units for Soil Heat Capacity (cs1, cs2, cs3, cs4,
   cs5) in the EBBR 30 minute netcdf header have been 
   incorrect from the beginning of processing the data
   into netcdf files.  The correct units are MJ/m^3/C.
   
   This does not affect the data quality.

• Soil heat capacity 1(cs1)
• Soil heat capacity 3(cs3)
• Soil heat capacity 5(cs5)
• Soil heat capacity 2(cs2)
• Soil heat capacity 4(cs4)

• Soil heat capacity 5(cs5)
• Soil heat capacity 1(cs1)
• Soil heat capacity 2(cs2)
• Soil heat capacity 4(cs4)
• Soil heat capacity 3(cs3)

SGP/EBBR/E27 - Soil Heat Flow #2 Incorrect

Soil Heat Flow sensor #2 was intermittently incorrect at first and then
constantly so later in the period.

• 5 cm soil heat flow, site 2(shf2)
• soil heat flow at the surface 2(g2)
• average surface soil heat flow at the surface(ave_shf)
• latent heat flux(e)
• corrected sensible heat flux(h)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)

• Soil heat flow 2(mv_hft2)

• soil heat flow at the surface 2(g2)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• average surface soil heat flow at the surface(ave_shf)
• latent heat flux(e)
• corrected sensible heat flux(h)
• 5 cm soil heat flow, site 2(shf2)

• Soil heat flow 2(mv_hft2)

SGP/EBBR/E27 - Wind Direction Hung

The Wind Direction frequently hung at values in the 70s or 80s.

No other data was affected. Fluxes were not affected.

• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)
• Resultant wind speed(res_ws)

• Wind direction (relative to true north)(mv_wind_d)

• Resultant wind speed(res_ws)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• wind direction (relative to true north)(wind_d)

• Resultant wind speed(res_ws)
• wind direction (relative to true north)(wind_d)
• standard deviation of wind direction (sigma theta)(sigma_wd)

• Wind direction (relative to true north)(mv_wind_d)

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 at the surface(ave_shf)
• corrected sensible heat flux(h)
• latent heat flux(e)