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 96/07/24 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.

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