SGP Site Power Outage Due to Winter Storm

On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.

• North latitude(lat)
• Cloud, base height, lowest base sensed(first_cbh)
• Third cloud base height(third_cbh)
• sample_count
• Cloud, base height, second lowest base sensed(second_cbh)
• Second boundary layer height candidate(bl_height_2)
• First boundary layer height candidate(bl_height_1)
• Third boundary layer height candidate(bl_height_3)
• Altitude above mean sea level(alt)
• detection_status
• East longitude(lon)
• bl_index_3
• bl_index_2
• bl_index_1
• base_time
• time_offset
• time

SGP/TSI/C1 - Ice storm

The TSI images were affected by an ice storm that caused the mirror to be covered with 
ice, the shadowband to stop rotating, and condensation to blur the images.

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

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available

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

SGP - Data System Upgrades: Data Missing

The data system was undergoing upgrades.  Data were lost during this period.

• qc_second_cbh
• measurement_parameters
• qc_first_cbh
• vertical_visibility
• background_light
• qc_third_cbh
• East longitude(lon)
• Third cloud base height(third_cbh)
• window_contamination
• window_transmission
• tilt_angle
• range_bounds
• base_time
• detection_status
• range
• laser_temperature
• Backscatter, ceilometer, range and sensitivity corrected(backscatter)
• receiver_sensitivity
• alt_highest_signal
• Cloud, base height, second lowest base sensed(second_cbh)
• qc_background_light
• status_flag
• time_bounds
• qc_sum_backscatter
• qc_receiver_sensitivity
• qc_laser_temperature
• qc_vertical_visibility
• Altitude above mean sea level(alt)
• North latitude(lat)
• time_offset
• qc_window_contamination
• sum_backscatter
• qc_laser_pulse_energy
• qc_alt_highest_signal
• laser_pulse_energy
• Cloud, base height, lowest base sensed(first_cbh)
• qc_tilt_angle
• time
• status_string
• qc_window_transmission

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

• JPEG data stream - documentation not yet available

• MPEG data stream - documentation not yet available

• time
• Cloud, base height, lowest base sensed(first_cbh)
• Cloud, base height, second lowest base sensed(second_cbh)
• bl_index_3
• bl_index_2
• bl_index_1
• Second boundary layer height candidate(bl_height_2)
• First boundary layer height candidate(bl_height_1)
• Third boundary layer height candidate(bl_height_3)
• North latitude(lat)
• Third cloud base height(third_cbh)
• Altitude above mean sea level(alt)
• base_time
• sample_count
• detection_status
• East longitude(lon)
• time_offset

• solar.altitude
• count_thin
• count.unknown
• count.sub.proczen
• qc_count_box
• region_zenith_count_thin
• count_sub_horz
• count.sub.horz
• count_unknown
• Cloud amount, thin (percent)(percent.thin)
• solar_azimuth
• Sunshine Meter(sunny)
• region_sun_count_thin
• qc_count_sky
• count_box
• sun_strength
• time
• qc_count_unknown
• region.zenith.count.thin
• qc_region_zenith_count
• region.sun.count.thin
• region.horizon.count
• count_sub_proczen
• qc_region_zenith_count_opaque
• qc_solar_altitude
• region_sun_count
• Altitude above mean sea level(alt)
• qc_region_horizon_count
• qc_sunny
• qc_time
• qc_count_sub_horz
• Cloud amount, opaque (percent)(percent.opaque)
• qc_region_horizon_count_opaque
• qc_count_thin
• qc_count_opaque
• time_offset
• count_sky
• region.horizon.count.opaque
• count.mask
• region.zenith.count
• Cloud amount, thin (percent)(percent_thin)
• North latitude(lat)
• region.zenith.count.opaque
• count.sky
• region.sun.count.opaque
• region_sun_count_opaque
• qc_region_zenith_count_thin
• qc_region_sun_count_thin
• qc_percent_thin
• region.sun.count
• count.box
• region_horizon_count_opaque
• qc_region_sun_count_opaque
• count_opaque
• qc_solar_azimuth
• qc_region_sun_count
• qc_region_horizon_count_thin
• qc_sun_strength
• count.opaque
• qc_percent_opaque
• solar_altitude
• region_horizon_count
• East longitude(lon)
• count_mask
• solar.azimuth
• region_zenith_count
• region_zenith_count_opaque
• region.horizon.count.thin
• qc_count_mask
• count.thin
• qc_count_sub_proczen
• base_time
• Cloud amount, opaque (percent)(percent_opaque)
• sun.strength
• region_horizon_count_thin

ENA/C1 - Reprocess: Slightly incorrect location fields

Some of the instruments are being processed with the previous "GRW-Azores" lat/lon/alt 
instead of the new "ENA-Azores" lat/lon/alt. The differences are minor, but will be 
corrected. The respective GRW and ENA lat, lon, and alt values are as follows:
 
GRW  lat = 39.0911 ;
ENA lat = 39.0916 ;
GRW  lon = -28.0297 ;
ENA  lon = -28.0257 ;
GRW  alt = 26 ;
ENA  alt = 30.48 ;

• North latitude(lat)
• East longitude(lon)
• Altitude above mean sea level(alt)

• North latitude(lat)
• Altitude above mean sea level(alt)
• East longitude(lon)

• North latitude(lat)
• Altitude above mean sea level(alt)
• East longitude(lon)

SGP/TSI/C1 - Reprocess: Corrupt properties file

The YYYMMDDHHMMSS_tsi.properties files were corrupted when the computer operating system 
was upgraded, causing the ingest to assign incorrect values to attributes opaque_thresh, 
thin_thresh, cam_mir_dist, and center_x. A default properties file from 5/25/2004 was 
briefly used and then a properties file from 10/11/2013 was being concatenated to the current 
properties file before it was moved to the ingest directory, so that the last values 
read were from the earlier date.

• base_time