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 retired
Southern Great Plains
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK
SGPE1 Browse DataLarned, KS retired
SGPE2 Browse DataHillsboro, KS (Extended) retired
SGPE3 Browse DataLeRoy, KS retired
SGPE4 Browse DataPlevna, KS retired
SGPE5 Browse DataHalstead, KS retired
SGPE6 Browse DataTowanda, KS retired
SGPE7 Browse DataElk Falls, KS retired
SGPE8 Browse DataColdwater, KS retired
SGPE9 Browse DataAshton, KS
SGPE10 Browse DataTyro, KS retired
SGPE11 Browse DataByron, OK
SGPE12 Browse DataPawhuska, OK
SGPE13 Browse DataLamont, OK (Extended)
SGPE15 Browse DataRingwood, OK
SGPE16 Browse DataVici, OK (Extended) retired
SGPE18 Browse DataMorris, OK (Extended) retired
SGPE19 Browse DataEl Reno, OK retired
SGPE20 Browse DataMeeker, OK (Extended) retired
SGPE21 Browse DataOkmulgee, OK
SGPE22 Browse DataCordell, OK retired
SGPE24 Browse DataCyril, OK retired
SGPE25 Browse DataSeminole, OK retired
SGPE27 Browse DataEarlsboro, OK retired
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 retired
Tropical Western Pacific
TWPC1 Browse DataCentral Facility, Manus I., PNG retired
TWPC2 Browse DataCentral Facility, Nauru Island retired
TWPC3 Browse DataCentral Facility, Darwin, Australia retired
 retired = Originating instrument has been retired at this location

Contact(s)

Krista Gaustad
Pacific Northwest National Laboratory
Developer
(509) 375-5950
krista.gaustad@pnnl.gov

Laura Riihimaki
Pacific Northwest National Laboratory
Translator
(509) 375-6406
laura.riihimaki@pnnl.gov