SGP/SIROS/E13 - occasional spikes in readings

Since installation of this SIROS site to the dates specified, negative spikes
occurred in the data streams indicated, especially up_short_hemisp,
down_short_hemisp, down_long_diffuse_hemisp, and short_direct_normal.  These spikes were
induced by electrical interference from the fence that was used to keep out
cattle.  The spikes were eliminated by moving the fence further away from the
SIROS sensors in September 1994.  An assessment by Mike Split on the effects of
the spikes indicated that the spikes superimposed on the readings ranged from
-10 to -100 W m^-2.  As many as 40 per day could occur.  As a result of these
spikes, the daily average reading of irradiance could be reduced by as much as 
1 W m^-2, a half-hour average could be reduced by as much as 2 W m^-2, and a 5-min
average could be affected by as much as 5 W m^-2.

• (Development raw data stream - documentation not supported)

• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Downwelling Longwave Diffuse Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_diffuse_hemisp)

DSGP/CM/C1 - misnamed (date) raw data file

The following data file contains data from 1998 but
was originally archived with 1999 in the file name.
The file was renamed per P011207.3, but the cause of
the misnaming (truncated first few records) was not
fixed.

DsgpcmdewpC1.00.981119.000000.raw.9811192359.icm.v0

• (Development raw data stream - documentation not supported)

SGP/SMOS - Truncated first records in selected sneakernet data files

The following data files contain data from 1998 but
were originally archived with file names with dates
years into the future.  The files were renamed per 
P011217.2-P011217.14, but the cause of the misnaming 
(truncated first records) was not fixed.

The files marked with an asterix (*) are candidates
for recycling to fill existing data gaps in the cdf
record.  The remaining files are documented here in
the event a future reprocessing effort is called for.

 sgpsmosE1.01.981127.000000.raw.9811272359.sneak.v0
 sgpsmosE1.01.981201.000000.raw.9812012359.sneak.v0
 sgpsmosE1.01.981203.000000.raw.9812032359.sneak.v0
 sgpsmosE3.01.981124.000000.raw.9811242359.sneak.v0
 sgpsmosE4.01.981125.000000.raw.9811252359.sneak.v0 *
 sgpsmosE4.01.981126.000000.raw.9811262359.sneak.v0 *
 sgpsmosE5.01.981125.000000.raw.9811252359.sneak.v0
 sgpsmosE5.01.981126.000000.raw.9811262359.sneak.v0
 sgpsmosE5.01.981127.000000.raw.9811272359.sneak.v0
 sgpsmosE5.01.981203.000000.raw.9812032359.sneak.v0
 sgpsmosE6.01.981125.000000.raw.9811252359.sneak.v0
 sgpsmosE6.01.981130.000000.raw.9811302359.sneak.v0
 sgpsmosE6.01.981204.000000.raw.9812042359.sneak.v0
 sgpsmosE6.01.981205.000000.raw.9812052359.sneak.v0
 sgpsmosE6.01.981207.000000.raw.9812072359.sneak.v0
 sgpsmosE7.01.981126.000000.raw.9811262359.sneak.v0 *
 sgpsmosE7.01.981128.000000.raw.9811282359.sneak.v0
 sgpsmosE7.01.981204.000000.raw.9812042359.sneak.v0
 sgpsmosE8.01.981122.000000.raw.9811222359.sneak.v0
 sgpsmosE8.01.981123.000000.raw.9811232359.sneak.v0
 sgpsmosE8.01.981202.000000.raw.9812022359.sneak.v0
 sgpsmosE9.01.981201.000000.raw.9812012359.sneak.v0
 sgpsmosE9.01.981204.000000.raw.9812042359.sneak.v0
 sgpsmosE11.01.981117.000000.raw.9811172359.sneak.v0 *
 sgpsmosE11.01.981202.000000.raw.9812022359.sneak.v0
 sgpsmosE13.01.981119.000000.raw.9811192359.sneak.v0
 sgpsmosE13.01.981125.000000.raw.9811252359.sneak.v0
 sgpsmosE13.01.981127.000000.raw.9811272359.sneak.v0
 sgpsmosE13.01.981129.000000.raw.9811292359.sneak.v0
 sgpsmosE13.01.981130.000000.raw.9811302359.sneak.v0
 sgpsmosE13.01.981201.000000.raw.9812012359.sneak.v0
 sgpsmosE15.01.981127.000000.raw.9811272359.sneak.v0
 sgpsmosE15.01.981203.000000.raw.9812031437.sneak.v0
 sgpsmosE24.01.981119.154900.raw.9811192359.sneak.v0
 sgpsmosE24.01.981120.000000.raw.9811202359.sneak.v0 *
 sgpsmosE24.01.981125.000000.raw.9811252217.sneak.v0 *
 sgpsmosE24.01.981127.000000.raw.9811271420.sneak.v0
 sgpsmosE24.01.981201.000000.raw.9812012359.sneak.v0
 sgpsmosE24.01.981202.000000.raw.9812021536.sneak.v0
 sgpsmosE25.01.981121.000000.raw.9811212359.sneak.v0
 sgpsmosE25.01.981122.000000.raw.9811222359.sneak.v0
 sgpsmosE25.01.981123.000000.raw.9811232359.sneak.v0
 sgpsmosE25.01.981124.000000.raw.9811242359.sneak.v0

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

• null(Raw data stream - documentation not supported)

SGP/SIROS/E11 - wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for
broadband irradiance as 'watts per square meter' (W/M^2).  
However, the
 units are really 'counts'.  The fields affected 
are SIROS:
   'hemisp_broadband:units'
   'diffuse_hemisp_broadband:units'
   'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was
corrected by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed
P960229.2)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)

SGP/SIROS/E13 - wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for
broadband irradiance as 'watts per square meter' (W/M^2).  
However, the
 units are really 'counts'.  The fields affected 
are SIROS:
   'hemisp_broadband:units'
   'diffuse_hemisp_broadband:units'
   'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was
corrected by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed
P960229.2)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

SGP/SIROS/E16 - wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for
broadband irradiance as 'watts per square meter' (W/M^2).  
However, the
 units are really 'counts'.  The fields affected 
are SIROS:
   'hemisp_broadband:units'
   'diffuse_hemisp_broadband:units'
   'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was
corrected by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed
P960229.2)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

SGP/SIROS/E4 - wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for
broadband irradiance as 'watts per square meter' (W/M^2).  
However, the
 units are really 'counts'.  The fields affected 
are SIROS:
   'hemisp_broadband:units'
   'diffuse_hemisp_broadband:units'
   'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was
corrected by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed
P960229.2)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

TWP/SKYRAD/C3 - reprocess: PIR identified as unshaded is really shaded

From the initial installation of the Darwin SKYRAD
suite of instruments, two shaded PIRs were installed
rather than one shaded an one unshaded PIR as
documented in the netcdf header information.

See P011109.2 for more discussion of this issue.

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Unshaded
  Pyrgeometer(inst_down_long_unshaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Unshaded Pyrgeometer(inst_down_long_hemisp_unshaded_tp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Unshaded
  Pyrgeometer(inst_down_long_unshaded_case_resist)

TWP/SKYRAD/C3  - IRT incorrect min/delta values

For field sky_ir_temp, the value of valid_min was incorrectly assigned to -49.7 C and no 
value of valid_delta was assigned. The actual values should be -60 and 50 C, respectively.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra-Red Temperature(sky_ir_temp)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)

SGP/SIROS/E16 - Wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for broadband irradiance as 
'watts per square meter' (W/m^2). However, the units are really 'counts'. 
The fields affected are SIROS:  
'hemisp_broadband:units'
'diffuse_hemisp_broadband:units'
'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was corrected 
by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed P960229.2) 
----------------------------------------

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

SGP/SIROS/E4 - Wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for broadband irradiance as 
'watts per square meter' (W/m^2). However, the units are really 'counts'. 
The fields affected are SIROS:  
'hemisp_broadband:units'
'diffuse_hemisp_broadband:units'
'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was corrected 
by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed P960229.2)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

SGP/SIROS/E11 - Wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for broadband irradiance as 
'watts per square meter' (W/m^2). However, the units are really 'counts'. 
The fields affected are SIROS:  
'hemisp_broadband:units'
'diffuse_hemisp_broadband:units'
'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was corrected 
by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed P960229.2)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)

SGP/SIROS/E13 - Wrong units for broadband irradiance

Headers for SIROS, MFR25m and MFR10m give the units for broadband irradiance as 
'watts per square meter' (W/m^2). However, the units are really 'counts'. 
The fields affected are SIROS:  
'hemisp_broadband:units'
'diffuse_hemisp_broadband:units'
'direct_norm_broadband:units'
MFR:
'mfr_up_hemisp_broadband:units'

This problem has existed since the beginning of the data streams, and was corrected 
by Jeff Slater on 1/23/96 (see C960314.2 by Ken Yates that closed P960229.2)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

SGP/SIROS - wrong units for broadband irradiance

Headers for SIROS, give the units for broadband irradiance as 'watts per square meter' 
(w/m^2).  However, the units are really 'counts'.  The fields affected are:
'hemisp_broadband:units'
'diffuse_hemisp_broadband:units'
'direct_norm_broadband:units'

This problem existed since the beginning of the data streams, and was
corrected on 1/23/96.

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)

• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)

• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)

Level of pyranometer for global solar was slightly off

DQR No:                               Platform: sgpsiros13

Subject: Level of pyranometer for global solar was slightly off

Date Submitted:  6/1/96
Submitted By: Marv Wesely             ___  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      _x_  Other __IT leader__
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement:
    What level data: (raw,a0,a1,b1,c1 etc):
    All levels of sgpsiros13, but only for down_short_hemisp.

    What location was the data collected at: 
 
    Period of time in question
        Begin Date  01/06/94
        End Date    12/06/94   Time   06:00    (GMT)

 Data should be labeled:
 ___  questionable                      ___  All data fields affected
 ___  incorrect                         _x_  Only some data fields affected
 ___  wrong calibration
 _x_  others 
 
 Discussion of Problem:

Analysis of SIROS data from the central facility has indicated 
that the pyranometer (or PSP) used for global (solar) irradiance 
observations appeared to be slightly off level until site operations 
personnel re-leveled the sensor on Dec. 6, 1994.  Calculations suggest 
that the sensor was leaning roughly toward the east by about 1.2 degrees.  
Comparisons to the nearby BSRN pyranometer ("psp2") show that the 
SIROS sensor was reading to high in the morning by as much as 5% and
too small in the late afternoon by about the same percentage.  
Little, if any, effect was seen between 1700 and 2100 UTC (in 
November), and the effect was be practically zero under cloudy
skies.  

Users of the data could conceivable adjust the data (down_short_hemisp
for sgpsiros13) with the direct-beam SIROS or BSRN observation and
values of the solar zenith and azimuth angles, which would need to 
be computed, and some fairly straighforward geometry calculations.
Possibly an easier course of action is to rely on the BSRN observation 
of global solar radiation for small solar elevation angles.

(This analysis was conducted by John DeLuisi and colleagues
in 1994 but was not documented with a DQR.  Some recent
discussions I have had with Science Team members have indicated
that they have seen this problem also.)

Other observations/measurements impacted by this problem:

None.

Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Ideally, this note would be sent Send to people who received SIROS13 
data for dates before Dec. 6, 1994, and the appropriate data in the 
archive would be flagged with this comment.

• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• 10 meter Longwave Dome Temperature, Pyrgeometer(up_long_dome_temp)
• lat(lat)
• 10 meter Longwave Case Temperature, Pyrgeometer(up_long_case_temp)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Flag fields with *2 returned from callang(flag_ln_error1-24)
• Ventilated Pyrgeometer Dome Temperature(down_long_dome_temp)
• Data Logger Supply Voltage(logger_volt)
• base time(base_time)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• MFRSR Detector Temperature(mfrsr_temp)
• Flag fields with *1 returned from callang(flag_zero_divisor1-24)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Flag fields with *3 returned from callang(flag_zero_cosine1-24)
• Downwelling Longwave Diffuse Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_diffuse_hemisp)
• Flag fields with *4 returned from callang(flag_nighttime1-24)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• MFRSR channels(channel)
• Dummy altitude for Zeb(alt)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Thermistor Excitation Voltage, Data Logger(therm_volt)
• Ventilated Pyrgeometer Case Temperature(down_long_case_temp)
• Logger panel temperature(logger_temp)

time stamp error

The internal code that runs the MFRSR data logger
had a bug that occasionally caused the time stamp associated with the data to
be slightly in error.  This error is thought to be very small (say less than
30 seconds) and very infrequent.  (Unfortunately, we cannot give firm
estimates of the magnitude and frequency of the error). 

After 96/07/11 the problem was corrected.  Those who use the data before this
time should realize that the time stamp for each record of data might be
slightly in error.

• Logger panel temperature(logger_temp)
• MFRSR channels(channel)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• Flag fields with *2 returned from callang(flag_ln_error1-24)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Ventilated Pyrgeometer Case Temperature(down_long_case_temp)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• MFRSR Detector Temperature(mfrsr_temp)
• Flag fields with *1 returned from callang(flag_zero_divisor1-24)
• 10 meter Longwave Dome Temperature, Pyrgeometer(up_long_dome_temp)
• Ventilated Pyrgeometer Dome Temperature(down_long_dome_temp)
• Flag fields with *4 returned from callang(flag_nighttime1-24)
• Downwelling Longwave Diffuse Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_diffuse_hemisp)
• 10 meter Longwave Case Temperature, Pyrgeometer(up_long_case_temp)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• lat(lat)
• Thermistor Excitation Voltage, Data Logger(therm_volt)
• Time offset of tweaks from base_time(time_offset)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Flag fields with *3 returned from callang(flag_zero_cosine1-24)
• Data Logger Supply Voltage(logger_volt)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• lon(lon)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)

time stamp error

The internal code that runs the MFRSR data logger
had a bug that occasionally caused the time stamp associated with the data to
be slightly in error.  This error is thought to be very small (say less than
30 seconds) and very infrequent.  (Unfortunately, we cannot give firm
estimates of the magnitude and frequency of the error). 

After 96/07/19 the problem was corrected.  Those who use the data before this
time should realize that the time stamp for each record of data might be
slightly in error.

• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• 10 meter Longwave Dome Temperature, Pyrgeometer(up_long_dome_temp)
• lat(lat)
• 10 meter Longwave Case Temperature, Pyrgeometer(up_long_case_temp)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Flag fields with *2 returned from callang(flag_ln_error1-24)
• Ventilated Pyrgeometer Dome Temperature(down_long_dome_temp)
• Data Logger Supply Voltage(logger_volt)
• base time(base_time)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• MFRSR Detector Temperature(mfrsr_temp)
• Flag fields with *1 returned from callang(flag_zero_divisor1-24)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Flag fields with *3 returned from callang(flag_zero_cosine1-24)
• Downwelling Longwave Diffuse Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_diffuse_hemisp)
• Flag fields with *4 returned from callang(flag_nighttime1-24)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• MFRSR channels(channel)
• Dummy altitude for Zeb(alt)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Thermistor Excitation Voltage, Data Logger(therm_volt)
• Ventilated Pyrgeometer Case Temperature(down_long_case_temp)
• Logger panel temperature(logger_temp)

time stamp error

The internal code that runs the MFRSR data logger
had a bug that occasionally caused the time stamp associated with the data to
be slightly in error.  This error is thought to be very small (say less than
30 seconds) and very infrequent.  (Unfortunately, we cannot give firm
estimates of the magnitude and frequency of the error). 

After 96/07/19 the problem was corrected.  Those who use the data before this
time should realize that the time stamp for each record of data might be
slightly in error.

• Thermistor Excitation Voltage, Data Logger(therm_volt)
• Downwelling Longwave Diffuse Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_diffuse_hemisp)
• lat(lat)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Data Logger Supply Voltage(logger_volt)
• Dummy altitude for Zeb(alt)
• 10 meter Longwave Case Temperature, Pyrgeometer(up_long_case_temp)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• MFRSR Detector Temperature(mfrsr_temp)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• lon(lon)
• Flag fields with *2 returned from callang(flag_ln_error1-24)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Flag fields with *3 returned from callang(flag_zero_cosine1-24)
• Flag fields with *4 returned from callang(flag_nighttime1-24)
• Ventilated Pyrgeometer Dome Temperature(down_long_dome_temp)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Time offset of tweaks from base_time(time_offset)
• 10 meter Longwave Dome Temperature, Pyrgeometer(up_long_dome_temp)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Ventilated Pyrgeometer Case Temperature(down_long_case_temp)
• Logger panel temperature(logger_temp)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Flag fields with *1 returned from callang(flag_zero_divisor1-24)
• MFRSR channels(channel)
• base time(base_time)

TWP/WSI

During this period of time the data acquisition frequency for the WSI on Nauru was
changed from every 10 minutes to every 12 minutes

• null(Raw data stream - documentation not supported)