MFRSR/SIROS E20 - ingest problems

From about 971224 to about 980123 the MFRSR ingest and the SIROS ingest
were both running at site E20.  Needless to say, this caused some data
collection mix ups.  Sometimes only the MFRSR data were collected while
at other times both the MFRSR and broadband data were collected.  These
data are probably OK, but one should beware of the potential for
problems and gaps in the MFRSR and SIROS data streams.

  The start and end dates indicated above are approximate.

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