time stamp error

The internal code that runs the MFRSR data logger
had a bug that occasionally caused the time stamp associated with the data to
be slightly in error.  This error is thought to be very small (say less than
30 seconds) and very infrequent.  (Unfortunately, we cannot give firm
estimates of the magnitude and frequency of the error). 

After 96/07/19 the problem was corrected.  Those who use the data before this
time should realize that the time stamp for each record of data might be
slightly in error.

• Diffuse Hemispheric Broadband Irradiance, offset corrected(diffuse_hemisp_broadband)
• 25 meter Upwelling Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Data logger supply voltage(logger_volt)
• Flag fields with *2 returned from callang(flag_ln_error1-24)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• -180.0 - +180.0(alt)
• Hemispheric broadband irradiance(hemisp_broadband)
• Downwelling Longwave Diffuse Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_diffuse_hemisp)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• 25 meter Longwave Case Temperature, Pyrgeometer(up_long_case_temp)
• Data Logger Temperature(logger_temp)
• Shortwave direct normal irradiance, pyrheliometer(short_direct_normal)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• Direct Normal Irradiance, MFRSR(direct_norm_broadband)
• Ventilated Pyrgeometer Dome Temperature(down_long_dome_temp)
• Time offset from base_time(time_offset)
• 10 meter Longwave Dome Temperature, Pyrgeometer(up_long_dome_temp)
• 10 meter Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• MFRSR channels(channel)
• Ventilated Pyrgeometer Case Temperature(down_long_case_temp)
• lon(lon)
• Flag fields with *3 returned from callang(flag_zero_cosine1-24)
• Thermistor Excitation Voltage, Data Logger(therm_volt)
• base time in epoch(base_time)
• North Latitude(lat)
• MFRSR Detector Temperature(mfrsr_temp)
• Flag fields with *1 returned from callang(flag_zero_divisor1-24)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Flag fields with *4 returned from callang(flag_nighttime1-24)