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Instrument : Sky Radiometers on Stand for Downwelling Radiation (SKYRAD)

Instrument Categories
Radiometric

Picture of the SKYRAD

General Overview

The Sky Radiation (SKYRAD) collection of radiometers provides each Atmospheric Radiation and Cloud Station (ARCS) with continuous measurements of broadband shortwave (solar), longwave (infrared), and ultraviolet irradiances for downwelling components. These 1-minute data are collected from a network of stations to help determine the total radiative energy exchange within the Tropical Western Pacific and North Slope of Alaska.

NOTE: See ARM Pyrgeometer Calibrations & Field Measurements: Information Regarding the Data Restriction Notice (PowerPoint presentation).

Output Value-Added Products

This instrument is an input to the following value-added products, which provide improved measurements or derived quantities.

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
qcrad1long : Surface Radiation Measurement Quality Control testing, including climatologically configurable limits
qcradbeflux1long : Surface Radiation Measurement (BEFLUX input) QC testing, incl. climatologically configurable limits
qcradbrs1long : Surface Radiation Measurement (BRS input) QC testing, incl. climatologically configurable limits
siros1dutt : Solar and Infrared Radiation Observing Station (SIROS): 1-min data with Dutton correction
sirs1dutt : SIRS: derived, correction of downwelling shortwave diffuse hemispheric measurements using Dutton and full algorithm

Output Datastreams

skyrad20s : Sky radiation sensor: 20-second downwelling radiation data
skyrad60s : Infrared Thermometer: Sky brightness temperature, averaged 60-second

Primary Measurements

The following measurements are those considered scientifically relevant.

Locations

North Slope Alaska (NSA)
- Central Facility, Atqasuk AK (C2)
- Central Facility, Barrow AK (C1)
Tropical Western Pacific (TWP)
- Central Facility, Darwin, Australia (C3)
- Central Facility, Manus I., PNG (C1)
- Central Facility, Nauru Island (C2)
ARM Mobile Facility (FKB)
- Black Forest, Germany (M1)
ARM Mobile Facility (GAN)
- Gan Airport, Gan Island, Maldives (M1)
ARM Mobile Facility (GRW)
- Graciosa Island, Azores, Portugal (M1)
ARM Mobile Facility (HFE)
- Shouxian, Anhui, China (M1)
ARM Mobile Facility (NIM)
- Niamey, Niger (M1)
ARM Mobile Facility (PGH)
- ARIES Observatory, Nainital, Uttarkhand, India (M1)
ARM Mobile Facility (PVC)
- Highland Center, Cape Cod MA; AMF 1 (M1)
ARM Mobile Facility (PYE)
- Point Reyes, CA (M1)
ARM Mobile Facility (SBS)
- Steamboat Springs CO, Valley Site (M1)