Bad upwelling and downwelling IR signal, bad upwelling SW signal

Data has been collected at site E3 since
about March 6, 1996. From this date to about March 21, 1996, the signal
from both IR pyrgeometers (both upwelling and downwelling) is bad. 
After March 21, 1996 these instruments were repaired and the data looks
reasonable.

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