SGP/SIROS/E4 - time offset on 960529

On 960529, site E4 was brought back on line.  For reasons I do not understand
the time stamp was incorrect for most of this day; for example, the sun
is at its zenith at about 0900 LST!  This is clearly incorrect.  In
the afternoon and evening hours, this site goes "down" and after this
down period the time problem appears to be solved.  The next day's
data (960530) looks correct and there appears to be no time problem.

The problem appears corrected, but don't use data taken on 960529!

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