TWP/TSI/C1 - Shadowband misalignment

The shadowband was not effectively blocking the sun, except for around the noon hours when 
the sun was directly over-head. It was later found to be caused by stripped threads on 
the mirror mounting post.

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available

• Cloud decision images, Total Sky Imager, PNG format(png)

• count.thin
• count.sky
• Cloud amount, thin (percent)(percent.thin)
• count.opaque
• Cloud amount, opaque (percent)(percent.opaque)
• count.mask

TWP/VCEIL/C1 - Missing data

Data are missing and unrecoverable.

• Second lowest cloud base height(second_cbh)
• alt_highest_signal
• time_offset
• detection_status
• tilt_angle
• sum_backscatter
• Lowest cloud base height detected.(first_cbh)
• receiver_sensitivity
• lon
• status_flag
• filename
• vertical_visibility
• measurement_parameters
• range
• window_contamination
• laser_temperature
• lat
• laser_pulse_energy
• alt
• status_string
• Third cloud base height(third_cbh)
• base_time
• Normalized corrected relative backscatter(backscatter)
• background_light

TWP/TSI/C2 - Shadowband misalignment

The mirror was continuously rotating and communication with the control board failed. As a 
result, the sun was not being blocked by the shadowband. The ethernet-to-serial adaptor 
was replaced.

• Cloud decision images, Total Sky Imager, PNG format(png)

• count.sky
• region.horizon.count.thin
• sun.strength
• region.sun.count
• region.zenith.count
• region.horizon.count.opaque
• region.zenith.count.opaque
• count.thin
• Sunshine Meter(sunny)
• Cloud amount, opaque (percent)(percent.opaque)
• region.horizon.count
• region.sun.count.thin
• region.sun.count.opaque
• count.opaque
• Cloud amount, thin (percent)(percent.thin)
• region.zenith.count.thin

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available

TWP/TSI/C1 - Camera misaligned

The camera was moved inside the enclosure so that the lens was not aligned with the 
viewing port and the shadowband was misaligned.

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available

• Cloud decision images, Total Sky Imager, PNG format(png)

• Sunshine Meter(sunny)
• count.sub.horz
• count.thin
• region.horizon.count
• count.box
• count.opaque
• region.sun.count.opaque
• region.sun.count
• region.horizon.count.opaque
• region.zenith.count.thin
• count.sky
• region.zenith.count
• count.sub.proczen
• Cloud amount, thin (percent)(percent.thin)
• sun.strength
• region.horizon.count.thin
• Cloud amount, opaque (percent)(percent.opaque)
• region.zenith.count.opaque
• region.sun.count.thin
• count.mask
• count.unknown

TWP/SKYRAD/C2 - Tracker failure

Tracker failed on 6/16/2011. Ops replaced with a spare tracker. The affected instruments 
are the 8-48 (down_short_diffuse) and NIP (direct_normal) shortwave instruments.

The down_long_hemisp1 and 2 (PIR1 and PIR2) performance may have been affected by exposure 
to direct sun.

• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• down_long_hemisp1_min
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• inst_down_long_hemisp2_tp
• down_long_hemisp1_max
• inst_down_long_hemisp1_tp
• down_long_hemisp2_std
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_long_hemisp1_std
• inst_down_long_hemisp1_dome_temp
• short_direct_normal_std
• down_long_hemisp2_max
• down_long_hemisp2_min
• inst_down_long_hemisp2_dome_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• inst_down_long_hemisp1_case_temp

• inst_diffuse
• inst_down_long_hemisp2_tp
• inst_direct_normal
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_dome_resist

TWP/TSI/C1/C2/C3 - Ingest Problem

A minor error was made with diagnostic metadata attribute sunny_thresh when the TSI ingest 
was updated.

• base_time

• base_time

• base_time

TWP/SKYRAD/C2 - IRT power failure

The IRT measurements were incorrect due to a drop in the logger battery voltage.

• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_std
• sky_ir_temp_max
• sky_ir_temp_min

• inst_sky_ir_signal

TWP/TSI/C1 - Shadowband misalignment

The shadowband was not maintaining its position because the mirror was loose.

• JPEG data stream - documentation not yet available

• Cloud decision images, Total Sky Imager, PNG format(png)

• count.thin
• count.opaque
• Cloud amount, thin (percent)(percent.thin)
• region.sun.count.opaque
• region.horizon.count.thin
• region.horizon.count.opaque
• Cloud amount, opaque (percent)(percent.opaque)
• region.zenith.count.opaque
• region.sun.count.thin
• region.zenith.count.thin

TWP/TSI/C2 - Control board failure

The indicated dome temperature and heat sink temperature were unreasonably high. The 
control board and serial adaptor were replaced and the instrument was shipped to Darwin for 
repair where the following was performed: 
- changed out 12V battery, 
- changed out faulty TT8 processor s/n 939476 with spare s/n 939476, 
- installed new model Lantronix EDS1100 serial to ethernet adapter,  
- modified board to adapter data connection to suit new adapter, 
- changed out two faulty temperature sensors (heatsink and dome), 
- changed out corroded heatsink fan and faulty wiring, 
- replaced damaged heater wiring, 
- removed corrosion and re-painted camera bracket, 
- waxed and polished dome mirror and whole instrument body.

• Cloud decision images, Total Sky Imager, PNG format(png)

• count.sky
• region.horizon.count.thin
• sun.strength
• region.sun.count
• region.zenith.count
• region.horizon.count.opaque
• region.zenith.count.opaque
• count.thin
• Sunshine Meter(sunny)
• Cloud amount, opaque (percent)(percent.opaque)
• region.horizon.count
• region.sun.count.thin
• region.sun.count.opaque
• count.mask
• count.opaque
• count.sub.proczen
• Cloud amount, thin (percent)(percent.thin)
• count.unknown
• region.zenith.count.thin
• count.box
• count.sub.horz

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available

TWP/SONDE/C2 - Incorrect latitude

Latitude incorrect:  When the new MRP111 card was installed on 08/08/2011, the DigiCORA 
software (v3.61.1) was also reloaded.  The latitude was incorrectly entered as +0.52.  It 
should have been entered as -0.52.  This mistake was corrected on 12/10/2011 when a 
compromised BBSS computer was replaced and the software reloaded.

Data will be reprocessed.

• lat

TWP/SONDE/C2 - Missing data

Date are missing and unrecoverable.

• lon
• Eastward Wind Component(u_wind)
• Northward Wind Component(v_wind)
• asc
• Humidity, relative(rh)
• base_time
• Dewpoint Temperature(dp)
• time_offset
• wstat
• Wind Direction(deg)
• alt
• Mean Wind Speed(wspd)
• Pressure, atmospheric, constant value of model level, RUC model output(pres)
• lat
• Dry Bulb Temperature(tdry)

TWP/GNDRAD/C1 - IRT failure

The IRT and power cable failed and were replaced.

• Effective Surface (Skin) Temperature(sfc_ir_temp)
• sfc_ir_temp_std
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)

• inst_sfc_ir_signal

TWP/SKYRAD/C1 - IRT failure

The IRT failed and was replaced.

• inst_sky_ir_signal

• sky_ir_temp_max
• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)

TWP/SKYRAD/C2 - Downwelling LW #1 questionable

Hemispheric downwelling measurements on the hemisp1 were suspect due to the large 
differences between PIR1 and PIR2 (i.e. greater than 10W/m2). Maintenance on 3/14/2012 indicated 
problem with the connector and ops re-seated the connector on PIR 1. After the 
maintenance, PIR1 and PIR2 returned to tracking each other within 10W/m2 as typical.

• down_long_hemisp1_max
• inst_down_long_hemisp1_tp
• down_long_hemisp1_std
• down_long_hemisp1_min
• inst_down_long_hemisp1_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• inst_down_long_hemisp1_case_temp

• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp

TWP/MPLCMASK/C1 - Polarization failure

MPLPOL polarization began to fail with cross_pol and co_pol modes both returning identical 
scatter.  Instrument replaced 20120502.  More information available in DQR D120411.1

• linear_depol_ratio
• qc_linear_depol_snr
• linear_depol_snr
• qc_linear_depol_ratio

TWP/SKYRAD/C2 - Tracker Failure

The solar tracker failed resulting in incorrect short_direct_normal and 
down_short_diffuse_hemisp data.  Data are not recoverable.

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• 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)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• inst_direct_normal
• inst_diffuse

TWP/IRT/C3 - Missing data

Data are missing and unrecoverable.

• samples_in_average
• ref_ir_temp
• sky_ir_temp_max
• sky_ir_temp_std
• time_offset
• lat
• sky_ir_temp_min
• alt
• IR Brightness Temperature(sky_ir_temp)
• base_time
• time
• lon

• alt
• lat
• base_time
• IR Brightness Temperature(sky_ir_temp)
• ref_ir_temp
• time_offset
• time
• lon

TWP/TSI/C1 - Water on lens

After a rain episode, drops of water collected on the lens window causing the cloud 
fraction values to be suspect. To prevent this, a drip edge was formed around the bottom of the 
enclosure with thick electrical or splicing tape.

• count.thin
• count.sky
• region.zenith.count
• Cloud amount, thin (percent)(percent.thin)
• count.opaque
• Cloud amount, opaque (percent)(percent.opaque)
• region.zenith.count.opaque
• region.zenith.count.thin

TWP/TSI/C2 - Water on lens

After a rain episode, drops of water collected on the lens window causing the cloud 
fraction values to be suspect. To prevent this, a drip edge was formed around the bottom of the 
enclosure with thick electrical or splicing tape.

• count.sky
• Cloud amount, opaque (percent)(percent.opaque)
• count.opaque
• region.zenith.count
• Cloud amount, thin (percent)(percent.thin)
• region.zenith.count.thin
• region.zenith.count.opaque
• count.thin

TWP/TSI/C3 - Water on lens

After a rain episode, drops of water collected on the lens window causing the cloud 
fraction values to be suspect. To prevent this, a drip edge was formed around the bottom of the 
enclosure with thick electrical or splicing tape.

• Cloud amount, thin (percent)(percent.thin)
• Cloud amount, opaque (percent)(percent.opaque)
• count.sky
• count.thin
• region.zenith.count.thin
• region.zenith.count
• region.zenith.count.opaque
• count.opaque

TWP/TSI/C3 - Reprocess: Recalibration

The processed image and cloud fraction determination were incorrect because the 
thin/opaque threshold was set too high.

• Cloud amount, thin (percent)(percent.thin)
• region.sun.count.opaque
• Cloud amount, opaque (percent)(percent.opaque)
• count.thin
• region.zenith.count.thin
• region.horizon.count.opaque
• region.horizon.count.thin
• region.zenith.count.opaque
• region.sun.count.thin
• count.opaque
• count.mask

• Cloud decision images, Total Sky Imager, PNG format(png)

TWP/TSI/C2 - Mirror contamination

The surface of the chrome mirror was soiled causing the cloud fraction determination to be 
unreliable.

• Cloud amount, opaque (percent)(percent.opaque)
• count.opaque
• Cloud amount, thin (percent)(percent.thin)
• count.thin

TWP/TSI/C2 - Lens covered

The lens was covered to protect the camera because the shadowband was misaligned.

• Cloud decision images, Total Sky Imager, PNG format(png)

• sun.strength
• solar.altitude
• region.zenith.count
• region.zenith.count.opaque
• count.thin
• Cloud amount, opaque (percent)(percent.opaque)
• region.sun.count.thin
• region.sun.count.opaque
• count.sub.proczen
• Cloud amount, thin (percent)(percent.thin)
• count.box
• region.zenith.count.thin
• count.sub.horz
• count.sky
• region.horizon.count.thin
• region.sun.count
• region.horizon.count.opaque
• Sunshine Meter(sunny)
• region.horizon.count
• count.mask
• count.opaque
• count.unknown
• base_time
• solar.azimuth

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available