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 96/08/20 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.

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