. >> for the last 29 years his partner in making the decision is elias fernandez, the wine maker, and he gave me a tour of the high tech tools fine tuning his craft. >> this is the weather station, hillside. >> this weather station is one of two wireless systems gathering detailed data in the field and transmitting it via a computer or cell phone. >> what analysis is done? >> it gives us temperatures, wind speeds, humidity and allows us to have a feel for what is going on here with the vines. >> the second system called frewition gives elias a real-time view of what is happening inside the vine. >> we have a thermocoupler in this area here, and with the solar producing energy, it will heat up the plant. >> the thermocoupler measures the change in heat, telling the vine. >> it tells us if the vine is in deficit or if it's doing fine. we can save water. >> especially in california, which seems to have been in remember. >> by eliminating water at the right times, and giving water at the right times. we have have the berry small. the smaller the berry the bigger the juice ratio, meaning m