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.

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