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.

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