bad data - MFRSR - site E9

From about 960614 to 960725, the data emanating from the MFRSR at site E9
was very noisy indicating that there was a problem with the instrument.
On 960725, the MFRSR head was changed and the problem appears to have been
solved.  The data quality could be poor prior to 960614, so beware!

change head - done on 960725

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