VAP : Shortwave Flux Analysis (SWFLUXANAL)

Instrument Categories
Radiometric, Cloud Properties

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 http://science.arm.gov/vaps/swflux.stm.

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
NSAC1Browse DataCentral Facility, Barrow AK
NSAC2Browse DataCentral Facility, Atqasuk AK
Southern Great Plains
SGPC1Browse DataCentral Facility, Lamont, OK
SGPE1Browse DataLarned, KS
SGPE2Browse DataHillsboro, KS (Extended)
SGPE3Browse DataLeRoy, KS
SGPE4Browse DataPlevna, KS
SGPE5Browse DataHalstead, KS
SGPE6Browse DataTowanda, KS
SGPE7Browse DataElk Falls, KS
SGPE8Browse DataColdwater, KS
SGPE9Browse DataAshton, KS
SGPE10Browse DataTyro, KS
SGPE11Browse DataByron, OK
SGPE12Browse DataPawhuska, OK
SGPE13Browse DataLamont, OK (Extended)
SGPE15Browse DataRingwood, OK
SGPE16Browse DataVici, OK (Extended)
SGPE18Browse DataMorris, OK (Extended)
SGPE19Browse DataEl Reno, OK
SGPE20Browse DataMeeker, OK (Extended)
SGPE21Browse DataOkmulgee, OK
SGPE22Browse DataCordell, OK
SGPE24Browse DataCyril, OK
SGPE25Browse DataSeminole, OK
SGPE27Browse DataEarlsboro, OK
SGPE31Browse DataAnthony, KS
SGPE32Browse DataMedford, OK
SGPE33Browse DataNewkirk, OK
SGPE34Browse DataMaple City, KS
SGPE35Browse DataTryon, OK
SGPE36Browse DataMarshall, OK
SGPE37Browse DataWaukomis, OK
SGPE38Browse DataOmega, OK
SGPN1Browse DataSouthern Great Plains Network
Tropical Western Pacific
TWPC1Browse DataCentral Facility, Manus I., PNG
TWPC2Browse DataCentral Facility, Nauru Island
TWPC3Browse 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