GAN/RAIN/M1 - Precipitation not measured

After maintenance and emptying of the bucket, the data flat-lined at zero due to 
communications problems.

Use ganmetM1.b1 precip data

• Precipitation intensity(precip_rate)
• Record with error(error_latch)
• Weight of accumulated precipitation in the gauge since the la st tare(total_weight)
• Temperature average, sensor 2(temp2)
• Temperature average, sensor 1(temp1)
• Temperature 3 inside the instrument enclosure(temp3)
• Millimeters of precipitation accumulated in the gauge since t he last tare.(total_mm)
• The latch counter counts number of measurement scans within one minute.(scans_per_min)
• Sensor 3 maximum weight(weight3)
• Time offset from base_time(time_offset)
• -180.0 - +180.0(alt)
• Total precipitation over one minute sampling period(precip)
• Panel temperature average(ptemp)
• North Latitude(lat)
• Voltage minimum(volt_min)
• base time in epoch(base_time)
• Frequency average, sensor 3(frequency3)
• Frequency average, sensor 2(frequency2)
• Frequency average, sensor 1(frequency1)
• Sensor status(stat_latch)
• time_in_seconds_since_volume_start(time)
• lon(lon)
• Sensor 2 maximum weight(weight2)
• Total maintenance count(maintenance_cnt)
• Sensor 1 maximum weight(weight1)