Bad upwelling IR signal, bad upwelling SW signal

Data has been collected at site E4 since
about April 1995.  We have just started to examine data from this
site taken from about 1 March 1996.  We do not know the quality of
the data before this date.  After this date, the signal from
the upwelling IR pyrgeometer is bad, as well as the signal from the
upwelling SW pyranometer.

Suggested Corrections of the Problem:

Inspect and fix the offending instruments (the repairpersons at the
SGP site have been notified about these instruments).

• 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)