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.

Recalculate the average soil heat flow (ave_shf),
latent heat flux (e), and sensible heat flux (h) 
using only soil sets 1, 3, 4, and 5, as follows:

ave_shf = (g1 + g3 + g4 + g5)/4

e = -(q + ave_shf)/(1 + Bowen)

h = -(q + e + ave_shf)

where q is net radiation and Bowen is the Bowen ratio.

• Soil heat flow 2 (mV)(soil_heat_flow_2_mv)

• Soil heat flow 2(soil_heat_flow_2)
• Surface soil heat flux 2(surface_soil_heat_flux_2)
• Surface sensible heat flux(sensible_heat_flux)
• Surface latent heat flux(latent_heat_flux)
• Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
• Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)