VAP : Shortwave Flux Analysis (SWFLUXANAL)

Instrument Categories
Cloud Properties, Radiometric

The SW (shortwave) Flux Analysis VAP applies a clear-sky detection and fitting technique (Long and Ackerman 2000) to data from broadband SW radiometers located at the Southern Great Plains site. This technique uses hemispheric, broadband total- and diffuse-shortwave irradiance measurements to identify clear-sky periods using the known characteristics of typical clear-sky irradiance time series. These clear-sky estimates are then used to infer the effect of cloudiness on the measured downwelling SW at 1-minute resolution for daylight hours. The 1-minute resolution analysis also includes data quality assessment that goes beyond standard min/max/delta and component comparison testing. The SW Flux Analysis VAP also uses a technique (Long et al. 1999) to infer average fractional sky cover at 15-minute resolution for solar elevation angles 10° or greater.

For more details, see The Shortwave (SW) Clear-Sky Detection and Fitting Algorithm: Algorithm Operational Details and Explanations technical report.

Output Products

  • 15swfanalbrs1long : Short Wave Flux Analysis: 15-min resolution on BRS data, Long algorithm
  • 15swfanalsiros1long : Short Wave Flux Analysis: 15-min resolution on SIROS data, Long algorithm
  • 15swfanalsirs1long : Short Wave Flux Analysis: 15-min resolution on SIRS data, Long algorithm
  • 15swfanalskyrad1long : Short Wave Flux Analysis: 15-min resolution on SKYRAD data, Long algorithm
  • 15swfcldfac1long : Fractional cloud cover, clear-sky and all-sky shortwave flux for each of 25 individual SGP facilities.
  • 1swfanalbrs1long : Short Wave Flux Analysis: 1-min resolution on BRS data, Long algorithm
  • 1swfanalsiros1long : Short Wave Flux Analysis: 1-min resolution on SIROS data, Long algorithm
  • 1swfanalsirs1long : Short Wave Flux Analysis: 1-min resolution on SIRS data, Long algorithm
  • 1swfanalskyrad1long : Short Wave Flux Analysis: 1-min resolution on SKYAD data, Long algorithm

Primary Measurements

The following measurements are those considered scientifically relevant.

Locations

North Slope Alaska
NSAC1 Browse DataCentral Facility, Barrow AK
NSAC2 Browse DataCentral Facility, Atqasuk AK
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK
SGPE1 Browse DataLarned, KS
SGPE2 Browse DataHillsboro, KS (Extended)
SGPE3 Browse DataLeRoy, KS
SGPE4 Browse DataPlevna, KS
SGPE5 Browse DataHalstead, KS
SGPE6 Browse DataTowanda, KS
SGPE7 Browse DataElk Falls, KS
SGPE8 Browse DataColdwater, KS
SGPE9 Browse DataAshton, KS
SGPE10 Browse DataTyro, KS
SGPE11 Browse DataByron, OK
SGPE12 Browse DataPawhuska, OK
SGPE13 Browse DataLamont, OK (Extended)
SGPE15 Browse DataRingwood, OK
SGPE16 Browse DataVici, OK (Extended)
SGPE18 Browse DataMorris, OK (Extended)
SGPE19 Browse DataEl Reno, OK
SGPE20 Browse DataMeeker, OK (Extended)
SGPE21 Browse DataOkmulgee, OK
SGPE22 Browse DataCordell, OK
SGPE24 Browse DataCyril, OK
SGPE25 Browse DataSeminole, OK
SGPE27 Browse DataEarlsboro, OK
SGPE31 Browse DataAnthony, KS
SGPE32 Browse DataMedford, OK
SGPE33 Browse DataNewkirk, OK
SGPE34 Browse DataMaple City, KS
SGPE35 Browse DataTryon, OK
SGPE36 Browse DataMarshall, OK
SGPE37 Browse DataWaukomis, OK
SGPE38 Browse DataOmega, OK
SGPN1 Browse DataSouthern Great Plains Network
Tropical Western Pacific
TWPC1 Browse DataCentral Facility, Manus I., PNG
TWPC2 Browse DataCentral Facility, Nauru Island
TWPC3 Browse DataCentral Facility, Darwin, Australia

Contact(s)

Krista Gaustad
Developer
(509) 375-5950
krista.gaustad@pnnl.gov

Laura Riihimaki
Translator
(509) 375-6406
laura.riihimaki@pnnl.gov