TWP/C2  Installation

The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Time offset from base_time(base_time)
• Internal Logger Temperature(logger_temp)
• Wind #2 direction standard deviation(wind2_dir_sd)
• precipitation minimum(precip_min)
• Wind #2 speed minimum(wind2_spd_min)
• Vapor pressure mean(vappress_mean)
• Internal voltage(internal_voltage)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Atmospheric pressure(atmos_pressure)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Vapor pressure standard deviation(vappress_sd)
• north latitude for all the input platforms.(lat)
• Precipitation maximum(precip_max)
• External voltage(external_voltage)
• Precipitation standard deviation(precip_sd)
• Relative humidity mean(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• east longitude for all the input platforms.(lon)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Bit data. See details.(bit_data)
• Time offset of tweaks from base_time(time_offset)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 speed maximum(wind2_spd_max)
• GPS raw data filename(filename)
• Temperature standard deviation(temp_sd)
• altitude above sea levelaltunits(alt)
• Relative humidity minimum(relh_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Precipitation mean(precip_mean)

• Precipitation standard deviation(precip_sd)
• Relative humidity minimum(relh_min)
• altitude above sea levelaltunits(alt)
• precipitation minimum(precip_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed maximum(wind1_spd_max)
• Internal voltage(internal_voltage)
• Temperature standard deviation(temp_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Time offset from base_time(base_time)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Mean Air Temperature or Hardware Error(temp_mean)
• Precipitation maximum(precip_max)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 direction standard deviation(wind2_dir_sd)
• External voltage(external_voltage)
• Atmospheric pressure(atmos_pressure)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• north latitude for all the input platforms.(lat)
• Relative humidity mean(relh_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• GPS raw data filename(filename)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Vapor pressure standard deviation(vappress_sd)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)
• east longitude for all the input platforms.(lon)
• Precipitation mean(precip_mean)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Internal Logger Temperature(logger_temp)
• Relative humidity maximum(relh_max)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Time offset of tweaks from base_time(time_offset)
• Bit data. See details.(bit_data)
• Vapor pressure mean(vappress_mean)
• Min Temperature at lowest Model Level- 1 hr(temp_min)

TWP/SMET/C2 - Negative rainfall rates

Due to limitations of the Zeno dataloggers all voltage measurements
from the optical rain gauge (ORG) were converted to rainfall rates. 
This resulted in negative values for rain rates.  Any value below
0.10 mm/hr should be considered to be 0 mm/hr.  New dataloggers 
alleviated this problem.

• Precipitation maximum(precip_max)
• Precipitation mean(precip_mean)
• precipitation minimum(precip_min)
• Precipitation standard deviation(precip_sd)

TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. 
Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC2.b1 datastream.  Between 9/26 and 11/29, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros are 
not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19981021-20060926 and data from 
19981021-20061129 will be filled with -9999 (missing).

• Time offset from base_time(base_time)