NREL Comparison of Absolute Cavity Pyrgeometers, InfraRed Integrating Sphere, and Pyrgeometers Traceable to World Infrared Standard Group: September 23-October 4, 2024

Ibrahim Reda; Afshin Andreas; Martina Stoddard; Berkley Weyer; Shawn Jaker; Aron Habte

doi:10.2172/2472548

NREL Comparison of Absolute Cavity Pyrgeometers, InfraRed Integrating Sphere, and Pyrgeometers Traceable to World Infrared Standard Group: September 23-October 4, 2024

Ibrahim Reda, Afshin Andreas, Martina Stoddard, Berkley Weyer, Shawn Jaker, Aron Habte

Research output: NREL › Technical Report

Abstract

The comparison of the absolute cavity pyrgeometers (ACPs) with the CG4 FT005 pyrgeometer traceable to the InfraRed Integrating Sphere (IRIS) referred to by FT005(IRIS), Eppley Precision Infrared Radiometer (PIR) pyrgeometers, and Kipp & Zonen (KZ) pyrgeometers traceable to the World Infrared Standard Group (WISG) was held during NREL ACP and IRIS Comparisons (NAIC) from September 23 to October 4, 2024. Data from all instruments was collected during nighttime clear sky conditions only. The irradiance measured by the ACPs is collected in 30 seconds intervals during the measurement period of two hours, and 10 seconds intervals during the calibration period of 6 minutes. Two methods described in [1] and [2] were used for the comparison based on original Reda et. al and proposed Forgan et. al.

Original language	American English
Number of pages	14
DOIs	https://doi.org/10.2172/2472548
State	Published - 2024

NREL Publication Number

NREL/TP-1900-91643

Keywords

ACP
atmospheric longwave irradiance
IRIS
Pyrgeometer
SI
WISG

Access to Document

10.2172/2472548

https://www.nrel.gov/docs/fy25osti/91643.pdf

Cite this

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title = "NREL Comparison of Absolute Cavity Pyrgeometers, InfraRed Integrating Sphere, and Pyrgeometers Traceable to World Infrared Standard Group: September 23-October 4, 2024",

abstract = "The comparison of the absolute cavity pyrgeometers (ACPs) with the CG4 FT005 pyrgeometer traceable to the InfraRed Integrating Sphere (IRIS) referred to by FT005(IRIS), Eppley Precision Infrared Radiometer (PIR) pyrgeometers, and Kipp & Zonen (KZ) pyrgeometers traceable to the World Infrared Standard Group (WISG) was held during NREL ACP and IRIS Comparisons (NAIC) from September 23 to October 4, 2024. Data from all instruments was collected during nighttime clear sky conditions only. The irradiance measured by the ACPs is collected in 30 seconds intervals during the measurement period of two hours, and 10 seconds intervals during the calibration period of 6 minutes. Two methods described in [1] and [2] were used for the comparison based on original Reda et. al and proposed Forgan et. al.",

keywords = "ACP, atmospheric longwave irradiance, IRIS, Pyrgeometer, SI, WISG",

author = "Ibrahim Reda and Afshin Andreas and Martina Stoddard and Berkley Weyer and Shawn Jaker and Aron Habte",

year = "2024",

doi = "10.2172/2472548",

language = "American English",

type = "Other",

}

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T1 - NREL Comparison of Absolute Cavity Pyrgeometers, InfraRed Integrating Sphere, and Pyrgeometers Traceable to World Infrared Standard Group: September 23-October 4, 2024

AU - Reda, Ibrahim

AU - Andreas, Afshin

AU - Stoddard, Martina

AU - Weyer, Berkley

AU - Jaker, Shawn

AU - Habte, Aron

PY - 2024

Y1 - 2024

N2 - The comparison of the absolute cavity pyrgeometers (ACPs) with the CG4 FT005 pyrgeometer traceable to the InfraRed Integrating Sphere (IRIS) referred to by FT005(IRIS), Eppley Precision Infrared Radiometer (PIR) pyrgeometers, and Kipp & Zonen (KZ) pyrgeometers traceable to the World Infrared Standard Group (WISG) was held during NREL ACP and IRIS Comparisons (NAIC) from September 23 to October 4, 2024. Data from all instruments was collected during nighttime clear sky conditions only. The irradiance measured by the ACPs is collected in 30 seconds intervals during the measurement period of two hours, and 10 seconds intervals during the calibration period of 6 minutes. Two methods described in [1] and [2] were used for the comparison based on original Reda et. al and proposed Forgan et. al.

AB - The comparison of the absolute cavity pyrgeometers (ACPs) with the CG4 FT005 pyrgeometer traceable to the InfraRed Integrating Sphere (IRIS) referred to by FT005(IRIS), Eppley Precision Infrared Radiometer (PIR) pyrgeometers, and Kipp & Zonen (KZ) pyrgeometers traceable to the World Infrared Standard Group (WISG) was held during NREL ACP and IRIS Comparisons (NAIC) from September 23 to October 4, 2024. Data from all instruments was collected during nighttime clear sky conditions only. The irradiance measured by the ACPs is collected in 30 seconds intervals during the measurement period of two hours, and 10 seconds intervals during the calibration period of 6 minutes. Two methods described in [1] and [2] were used for the comparison based on original Reda et. al and proposed Forgan et. al.

KW - ACP

KW - atmospheric longwave irradiance

KW - IRIS

KW - Pyrgeometer

KW - SI

KW - WISG

U2 - 10.2172/2472548

DO - 10.2172/2472548

M3 - Technical Report

ER -

NREL Comparison of Absolute Cavity Pyrgeometers, InfraRed Integrating Sphere, and Pyrgeometers Traceable to World Infrared Standard Group: September 23-October 4, 2024

Abstract

NREL Publication Number

Keywords

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