SGP/EBBR/E4 - Reprocess: Intermittently bad soil heat flux sensor #4

On October 23, 1993 soil heat flux sensor #4 (which had been installed on
September 23, 1993) of the Plevna, KS EBBR (E4) developed an intermittent poor
electrical contact with the multiplexer.  Corrupted 30 minute values of shf4,
c_shf4, g4, ave_shf, h, and e, and corrupted 15 minute values of mv_hft4
resulted from this situation.  

The quantities shf4, c_shf4, g4, and mv_hft4 are bad data values and are not 
recoverable.  The other quantities can be recalculated using the three
functioning sets of soil sensors. (Note: Soil heat flux sensor #5 was also
malfunctioning during the time periods identified and has therefore been
eliminated from the recalculation equations.  This problem is identified
in a separate DQR.)

ave_shf = (g1 + g2 + g3)/3
e = -(q + ave_shf)/(1 + bowen)
h = -(e + ave_shf + q)

Recalculate sensible, latent and soil heat fluxes using the equations provided.

• Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
• Soil heat flow 4(soil_heat_flow_4)
• Surface latent heat flux(latent_heat_flux)
• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
• Surface soil heat flux 4(surface_soil_heat_flux_4)
• Surface sensible heat flux(sensible_heat_flux)

• Soil heat flow 4 (mV)(soil_heat_flow_4_mv)