SGP/RL/C1 - Alternatively processed data available

Reprocessed ARM Raman Lidar water vapor data is available for 
               the IHOP IOP period 20020515 to 20020625 at 
               http://iop.archive.arm.gov/arm-iop/2002/sgp/ihop/turner-raman/
               The data were reprocessed by Dave Turner to apply an improved 
               near-field correction ("overlap correction") to the water
               vapor data collected by the Raman lidar during IHOP.  These
               files contain only the water vapor data; users who require the
               aerosol and cloud fields from this instrument will need to
               retrieve the regular ARM data sets.

Compare standard and alternative products as necessary for a particular application

• Uncertainty of the water vapor mixing ratio profile from the high channel(mixing_ratio_error_high)
• Flag denoting the occurrence of power or alignment tweaks(tweaks)
• Differential transmission correction for aerosols(diff_trans_aerosol_corr)
• Water vapor mixing ratio(mixing_ratio_other)
• Calibration factor used to match the high channel mixing ratio to the low
  channel mixing ratio(calib_high_low)
• Random error in the precipitable water vapor observed by the Raman lidar(pwv_rl_err)
• Height(height)
• Water vapor mixing ratio profile created by merging the two calibrated channels
  together with the surface in-situ measurements(mixing_ratio_3)
• Water vapor mixing ratio profile created by merging the two calibrated channels(mixing_ratio_2)
• Uncertainty of the water vapor mixing ratio profile created by merging the two
  calibrated channels(mixing_ratio_2_error)
• Water vapor mixing ratio profile created by merging the two channels(mixing_ratio_1)
• Average laser energy of the ensemble shots(average_energy)
• lon(lon)
• Height range of the low channel aerosol scattering ratio profile(height_low)
• Water vapor mixing ratio profile from the low channel(mixing_ratio_low)
• Number of lidar pulses summed(shots_summed)
• Uncertainty of the water vapor mixing ratio profile created by merging the two
  calibrated channels(mixing_ratio_3_error)
• Mode index(mode)
• Vertical resolution of bright mode (mode == 2) data(vertical_resolution_bright_mode)
• Cloud liquid water vapor by the microwave radiometer(liq_mwr)
• Precipitable water vapor from microwave radiometer(pwv_mwr)
• -180.0 - +180.0(alt)
• Vertical resolution of normal mode (mode == 1) data(vertical_resolution_normal_mode)
• Calibration factor for entire profile(calib_factor)
• North Latitude(lat)
• Flag indicating whether or not there was a sample from the temperature_source
  dataset during the lidars averaging interval (1) or not (0)(sample_times_other)
• Height range of the high channel aerosol scattering ratio profile(height_high)
• Cloud base height(cloud_base_height_other)
• Uncertainty of the water vapor mixing ratio profile created by merging the two
  channels(mixing_ratio_1_error)
• Time offset from base_time(time_offset)
• Suggested maximum altitude to use the water vapor data from the Raman lidar(wv_rl_max_height)
• Fraction of the total precipitable water vapor in the column sensed by the Raman
  lidar(pwv_rl_fraction)
• Temperature used for calculation(temperature)
• Derived pressure(pressure)
• Relative humidity over ice calculated from the merged water vapor mixing ratio
  data(relative_humidity_over_ice)
• Relative humidity calculated from the merged water vapor mixing ratio data(relative_humidity)
• Uncertainty of the water vapor mixing ratio profile from the low channel(mixing_ratio_error_low)
• Precipitable water vapor observed by the Raman lidar(pwv_rl)
• Water vapor mixing ratio profile from the high channel(mixing_ratio_high)
• base time in epoch(base_time)

• Water vapor mixing ratio from the Raman lidar near 60 m(rl_w_60m)
• Temperature(t)
• Median vertical velocity(w)
• pressure(p)
• Suggested maximum altitude to use the water vapor data from the Raman lidar(w_max_height)
• Random error in the precipitable water vapor observed by the Raman lidar(pwv_rl_err)
• Water vapor mixing ratio error from the Raman lidar near 60 m(rl_w_60m_err)
• Fraction of the total precipitable water vapor in the column sensed by the Raman
  lidar(pwv_rl_fraction)
• Resolution of the water vapor profiles(mixing_ratio_resolution)
• Precipitable water vapor observed by the Raman lidar(pwv_rl)
• Relative Humidity (hybrid-b grid)(rh)
• Random error in the water vapor mixing ratio profile(w_err)

• Random error in the water vapor mixing ratio profile(w_err)
• Random error in the precipitable water vapor observed by the Raman lidar(pwv_rl_err)
• Fraction of the total precipitable water vapor in the column sensed by the Raman
  lidar(pwv_rl_fraction)
• Relative Humidity (hybrid-b grid)(rh)
• Water vapor mixing ratio error from the Raman lidar near 60 m(rl_w_60m_err)
• Water vapor mixing ratio from the Raman lidar near 60 m(rl_w_60m)
• Precipitable water vapor observed by the Raman lidar(pwv_rl)
• Median vertical velocity(w)
• Temperature(t)
• pressure(p)
• Suggested maximum altitude to use the water vapor data from the Raman lidar(w_max_height)
• Resolution of the water vapor profiles(mixing_ratio_resolution)