TWP/SKYRAD - Manus PIR-G RGD1,2,3 bad 1999/10/25-2000/01/06

Due to an error in the Manus SKYRAD data logger configuration, the
instantaneous values reported from the PIR-G (unshaded pyrgeometer) dome
thermistor are incorrect.  This only affects the instantaneous (10s, 30s
and 50s) data points.  The correct values were used in the calculation
of the PIR irradiance.  The affected values are obvious, as they are
round -26,000 ohms.  The bad data values are RGD1, RGD2 and RGD3, in
columns 11, 12 and 13 of the actual data (starting AFTER the "flags"
column).

• Raw data stream - documentation not supported

• pir1_dome_therm

TWP/SKYRAD/C1 - Shaded vs. unshaded radiometer comparison

The daily average difference between the shaded and unshaded PIRs
reversed on 19980428.  Previous to then, the unshaded PIR was typically
about 2 Wm-2 less than the shaded PIR.  Since the 28th, the unshaded
PIR has been averaging about 4-5 Wm-2 greater than the shaded PIR.
This latter difference worsened for the period 5/25 to 5/31, when the
daily average difference increased to between 8-10 Wm-2.    The
disagreement is typically greater at night, reaching differences of
greater than 12 Wm-2 during the period 5/25-5/31.  The cause for the
switch in sign of the difference can most likely be attributed to
instrument replacement, however the (in general) larger absolute
disagreement after Apr 28th indicates a possible calibration problem.
The cause of the large discrepancies from 5/25 to 5/31 is unknown.

I noticed that the daylight differences increased slightly, with an
attendant slight decrease in the night differences. This daylight
difference is on the order of an additional 1 Wm-2.

Note: the unshaded PIR is incorrectly named "shaded2" during this
time period.  This is covered in a separate DQR.

• down_long_hemisp_shaded2_min
• down_long_hemisp_shaded2_std
• down_long_hemisp_shaded1_min
• down_long_hemisp_shaded2_max
• down_long_hemisp_shaded1_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• down_long_hemisp_shaded1_max
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)

• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_down_long_shaded1_dome_resist
• inst_down_long_shaded2_case_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded1_case_resist
• inst_down_long_shaded2_dome_resist

TWP/SKYRAD/C2 - PIR offline for B/W comparison

The shaded PIR was disconnected so a side by side comparison could be made with the shaded 
PSP and new shaded B/W PSP.

• pirs_sd
• pirs_max
• pirs_mean
• pirs_min

• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• inst_down_long_hemisp2_tp
• down_long_hemisp2_max
• down_long_hemisp2_min
• down_long_hemisp2_std
• inst_down_long_hemisp2_dome_temp

• pir2_case_therm
• pir2_dome_therm

TWP/SKYRAD/C1 - Solar tracker malfunction

The solar tracker malfunctioned and did not track the sun reliably
during this period.  This makes the PIR, PSP(now 848 Black/White),
and NIP data suspect.	

Note: the unshaded PIR is incorrectly named "shaded2" during this
time period.  It was not affected by the tracker malfunction.  The
improper naming is covered in a separate DQR.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• down_long_hemisp_shaded1_min
• down_long_hemisp_shaded1_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• down_long_hemisp_shaded1_max
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)

• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_down_long_shaded1_dome_resist
• inst_down_long_shaded1_case_resist

TWP/SKYRAD/C2 - Solar tracker failure

The solar tracker malfunctioned and did not track the sun reliably during the specified 
periods.  PIR, PSP, and NIP data are suspect.

The solar tracker may have operated satisfactorily during some periods within these time 
frames. Approximate verification on quality could be made by comparing the NIP data with 
the MFRSR data.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_long_hemisp_shaded_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• down_long_hemisp2_std
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• down_long_hemisp2_max
• down_long_hemisp2_min
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)

• inst_down_long_shaded_case_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_down_long_shaded_dome_resist

TWP/SKYRAD/C2 - reprocess: PIR identified as unshaded is really shaded

On 17Sep01 the Global PIR was moved from the unshaded position
on the Skyrad stand to the new 'shaded' spot on the new K&Z tracker.
It is still using the same Logger channel as it did as an unshaded 
PIR even though it is now shaded.

This problem has been documented in P011109.2.  This DQR should
be linked to that PIF and an end date added when the problem is
resolved.

• inst_down_long_unshaded_case_resist
• inst_down_long_unshaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_unshaded_tp)

TWP/C2  Installation

The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.

• Raw data stream - documentation not supported

• lat
• pir2_dome_therm
• uvb_temp
• pir1_case_therm
• filename
• base_time
• time_offset
• uvb_uncorr_irradiance
• pir2_case_therm
• lon
• alt
• pir1_dome_therm
• pir2_uncorr_irradiance
• pir1_uncorr_irradiance

• uvb_max
• base_time
• psp1_mean
• nip_min
• nip_sd
• pir1_sd
• pir1_max
• lon
• psps_min
• alt
• pirs_min
• uvb_sd
• pir1_mean
• logger_temp
• nip_max
• psp1_sd
• filename
• pirs_max
• psps_sd
• nip_mean
• irt1_mean
• external_voltage
• psp1_max
• irt1_min
• bit_data
• psp1_min
• lat
• uvb_min
• pirs_mean
• time_offset
• psps_max
• irt1_sd
• uvb_mean
• pir1_min
• pirs_sd
• irt1_max
• psps_mean
• internal_voltage

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.

• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_unshaded_tp)
• inst_down_long_unshaded_dome_resist
• inst_down_long_unshaded_case_resist

TWP/SKYRAD/C2 - Reprocess: Incorrect UVB Calibration Coefficient

The uvb calibration coefficient was entered incorrectly as 0.2151
instead of 0.2332.

• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• down_uvb_std

• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• down_uvb_std
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)

TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• uvb_min
• down_uvb_std
• uvb_mean
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• uvb_sd
• uvb_max

• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• down_uvb_std
• uvb_max
• uvb_sd
• uvb_mean
• uvb_min
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)

• uvb_uncorr_irradiance
• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)
• uvb_temp
• inst_down_uvb_temp

TWP/SKYRAD/C2 - Incorrect Calibration Coefficients Applied

Incorrect calibration coefficients were entered for three instruments (PSPG, PIRD and 
PIRG) at the RESET last Sept.

• pir1_min
• pir1_mean
• pir1_max
• pirs_sd
• psp1_sd
• psp1_mean
• pirs_max
• psp1_max
• pirs_mean
• pirs_min
• psp1_min
• pir1_sd

• pir2_uncorr_irradiance
• pir1_uncorr_irradiance

TWP/SKYRAD/C1 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• down_uvb_std
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)

• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)
• inst_down_uvb_temp

TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• inst_down_uvb_temp
• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• down_uvb_std
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)

TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• down_uvb_std
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• down_uvb_std

• inst_down_uvb_temp
• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)

TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• down_uvb_std
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)

• inst_down_uvb_temp
• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)

TWP/SKYRAD/C1 - RESET activities

RESET actiivities may have affected data in subtle ways during this period.

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_hemisp_std
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_long_hemisp_shaded2_min
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• down_long_hemisp_shaded1_min
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_long_hemisp_shaded2_max
• down_long_hemisp_shaded1_std
• down_uvb_std
• IR Brightness Temperature(sky_ir_temp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_long_hemisp_shaded2_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• sky_ir_temp_max
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• down_long_hemisp_shaded1_max
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• sky_ir_temp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• sky_ir_temp_min

• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_down_long_shaded1_dome_resist
• inst_down_long_shaded2_case_resist
• inst_down_long_shaded2_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded1_case_resist

TWP/SKYRAD/C1 - Incorrect 20s dome thermistor data

The 30-second and 50-second PIR2 diffuse dome thermistor data 
in all skyrad 20s data records taken to date is, in fact, case 
thermistor data.  No other data are affected.  The 20 second
skyrad data cannot be used to recompute the diffuse PIR2 data.

Note: This data was named pir2_dome_therm at the beginning of 
this time range and later the variable was renamed to
inst_down_long_shaded2_dome_resist.

• inst_down_long_shaded2_dome_resist
• pir2_dome_therm

TWP/SKYRAD/C2 - Incorrect 20s dome thermistor data

The 30-second and 50-second PIR2 diffuse dome thermistor data
in all skyrad 20s data records taken to data is in fact case
thermistor data.  No other data are affected.  The 20 second
skyrad data cannot be used to recompute the diffuse PIR2 data.

Note: This data was named pir2_dome_therm at the beginning of
this time range and later the variable was renamed to
inst_down_long_shaded2_dome_resist.

• pir2_dome_therm
• inst_down_long_shaded2_dome_resist

Calibration data interruption at TWP Nauru

Data interrupted to perform electronic calibration of data logger

• psp1_mean
• uvb_mean
• psp1_sd
• lon
• pirs_mean
• psps_max
• pir1_max
• psps_min
• bit_data
• logger_temp
• nip_mean
• pirs_sd
• psps_mean
• alt
• irt1_sd
• lat
• pirs_min
• uvb_sd
• irt1_mean
• psp1_min
• uvb_max
• uvb_min
• nip_sd
• pirs_max
• nip_min
• psp1_max
• nip_max
• base_time
• time_offset
• pir1_min
• pir1_mean
• filename
• irt1_max
• external_voltage
• internal_voltage
• irt1_min
• psps_sd
• pir1_sd

• Raw data stream - documentation not supported

• lat
• pir2_dome_therm
• uvb_temp
• pir1_case_therm
• filename
• base_time
• time_offset
• uvb_uncorr_irradiance
• pir2_case_therm
• lon
• alt
• pir1_dome_therm
• pir2_uncorr_irradiance
• pir1_uncorr_irradiance

• uvb_max
• psp1_mean
• base_time
• nip_min
• nip_sd
• pir1_sd
• lon
• pir1_max
• psps_min
• alt
• pirs_min
• pir1_mean
• uvb_sd
• logger_temp
• nip_max
• psp1_sd
• filename
• pirs_max
• psps_sd
• nip_mean
• irt1_mean
• external_voltage
• psp1_max
• irt1_min
• bit_data
• psp1_min
• lat
• uvb_min
• time_offset
• pirs_mean
• psps_max
• uvb_mean
• irt1_sd
• pir1_min
• pirs_sd
• irt1_max
• internal_voltage
• psps_mean