TWP/TSI/C3 - Missing data due to Mentor Activities

Darwin TSI on-board image collection and processing
had been turned off for Instrument Mentor to make
fine tuning adjustments. Mentor then forgot to turn
the on-board image collection and processing back
on.  All data for this time period is missing and
unrecoverable.

• count.sub.proczen
• region.zenith.count
• count.sub.horz
• count.unknown
• Cloud amount, opaque (percent)(percent.opaque)
• sun.strength
• region.sun.count
• Sunshine Meter(sunny)
• North latitude(lat)
• Cloud amount, thin (percent)(percent.thin)
• region.horizon.count
• region.sun.count.opaque
• count.thin
• region.zenith.count.thin
• region.horizon.count.opaque
• time_offset
• Altitude above mean sea level(alt)
• solar.altitude
• count.box
• East longitude(lon)
• region.zenith.count.opaque
• count.opaque
• count.sky
• region.horizon.count.thin
• solar.azimuth
• base_time
• region.sun.count.thin
• count.mask

TWP/TSI/C3 - Metadata Errors in NetCDF Header

The value of "sample_int" reported in the netCDF header is
incorrect.  The correct sampling interval is 30 seconds.

The maximum values for the variable "sunny" is incorrect.  
It should be 1, not 100 as documented in the netCDF header. 
Users should disregard the "qc_sunny" flag during this
period of time and apply their own qc check if desired.

The minimum value for the variable "solar.altitude" is
incorrect. It should be -90, not 10 as documented in the
netCDF header.  Users should disregard the "qc_solar.altitude"
flag during this period of time and apply their own qc check
if desired.

• time_offset
• solar.altitude
• Sunshine Meter(sunny)

TWP/TSI/C3 - poor images

The resolution of TSI images were very poor and the colors were wrong.  The clear sky 
appeared a reddish-brown during the day causing the processed image to be 100% opaque. The 
problem was corrected when the instrument was power cycled.

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

TWP/TSI/C3 - camera failure

The TSI image was out of focus due to condensation on the camera lens and PC board that 
led to camera failure. The problem was corrected by replacing the camera with a spare and 
adjusting the shadowband.

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

TWP/TSI/C3  - initial configuration

When the TSI-660 was deployed, there were several days of initial adjustments to the 
shadowband alignment and sky filter.

• count.sub.proczen
• region.zenith.count
• count.sub.horz
• count.unknown
• Cloud amount, opaque (percent)(percent.opaque)
• sun.strength
• region.sun.count
• Sunshine Meter(sunny)
• North latitude(lat)
• Cloud amount, thin (percent)(percent.thin)
• region.horizon.count
• region.sun.count.opaque
• count.thin
• region.zenith.count.thin
• region.horizon.count.opaque
• time_offset
• Altitude above mean sea level(alt)
• solar.altitude
• count.box
• East longitude(lon)
• region.zenith.count.opaque
• count.opaque
• count.sky
• region.horizon.count.thin
• solar.azimuth
• base_time
• region.sun.count.thin
• count.mask

TWP/TSI/C3 - Missing data

Data are missing and unrecoverable.

• count.sub.proczen
• region.zenith.count
• count.sub.horz
• count.unknown
• Cloud amount, opaque (percent)(percent.opaque)
• sun.strength
• region.sun.count
• Sunshine Meter(sunny)
• North latitude(lat)
• Cloud amount, thin (percent)(percent.thin)
• region.horizon.count
• region.sun.count.opaque
• count.thin
• region.zenith.count.thin
• region.horizon.count.opaque
• time_offset
• Altitude above mean sea level(alt)
• solar.altitude
• count.box
• East longitude(lon)
• region.zenith.count.opaque
• count.opaque
• count.sky
• region.horizon.count.thin
• solar.azimuth
• base_time
• region.sun.count.thin
• count.mask

TWP/TSI/C3 - controller board failure

The mirror control board failed and was replaced with a spare. Several images were 
collected in the iterim that should be ignored. These images include periods when the sun was 
not masked by the shadowband, the camera lens was covered by red tape to protect the CCD 
from direct exposure to the sun and, the instrument was inside the shop for repair and 
testing.

• count.sub.proczen
• region.zenith.count
• count.sub.horz
• count.unknown
• Cloud amount, opaque (percent)(percent.opaque)
• sun.strength
• region.sun.count
• Sunshine Meter(sunny)
• North latitude(lat)
• Cloud amount, thin (percent)(percent.thin)
• region.horizon.count
• region.sun.count.opaque
• count.thin
• region.zenith.count.thin
• region.horizon.count.opaque
• time_offset
• Altitude above mean sea level(alt)
• solar.altitude
• count.box
• East longitude(lon)
• region.zenith.count.opaque
• count.opaque
• count.sky
• region.horizon.count.thin
• solar.azimuth
• base_time
• region.sun.count.thin
• count.mask

TWP/TSI/C3 - mirror continously rotating

The mirror/shadowband was rotating continously because of a serial communication problem 
with the control board. The problem was corrected when the Ethernet-to-serial adaptor was 
replaced.

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

TWP/TSI/C3 - Mirror continuously rotating

The mirror/shadowband was continuously rotating. Communication with the serial adaptor was 
lost because the battery had gone resistive and loading down the system. The battery was 
replaced and communication restored.

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

TWP/TSI/C3 - Maintenance/Control board update

The mirror did not turn and the shadowband did not mask the sun while the control 
interface board was being upgraded.

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

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

TWP/TSI/C3 - Power supply failure

The power supply began to fail, causing all black or all white images and intermittent 
image collection. The power supply was replaced.

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

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

TWP/TSI/C3 - Reprocess: Recalibration

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

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

TWP/TSI/C1/C2/C3 - data processing problem

Values of count_opaque and count_thin are reals but should be integers  (units = pixels).

• count.thin
• count.opaque

TWP/TSI/C1/C2/C3 - Reprocessing Notice (RID 951)

See below for details of reprocessing that was completed on 20140922.  Original 
DQR category: 5 (Transparent - Does not affect quality).

-----------------------------------------------------------

The units of global attributes region_sun_radius and region_zenith_radius should be 
degrees, not pixels.

• base_time

TWP/TSI/C3 - mirror continuously turning

The mirror was continuously turning so the shadowband was not masking the sun.

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

TWP/TSI/C3 - Reprocess: Global attribute units incorrect for cam_mir_dist

The global attribute cam_mir_dist was converted incorrectly. The raw 
camera.mirror.distance, in inches, was multiplied by 10 and assigned a unit of mm.

• base_time