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 96/07/11 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.

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