TWP/SMET/C2 - Tower down for calibration activities

Tower lowered, wind vanes spun at different frequencies, and ORG tested with electronic 
rain.

Data to be ignored during this period.

• wind2_spd_min
• relh_min
• temp_min
• precip_min
• precip_sd
• wind2_spd_max_gust
• relh_sd
• wind1_spd_max_gust
• wind2_dir_sd
• precip_max
• wind1_spd_arith_avg
• precip_mean
• relh_mean
• temp_mean
• wind1_spd_min
• wind1_dir_sd
• wind2_spd_sd
• vappress_sd
• wind1_spd_vec_avg
• wind2_dir_vec_avg
• vappress_mean
• wind1_dir_vec_avg
• wind1_spd_max
• wind2_spd_arith_avg
• temp_max
• wind2_spd_max
• temp_sd
• relh_max
• wind2_spd_vec_avg
• wind1_spd_sd