borcal-lw 2015-01 - atmospheric system research · borcal-lw broadband outdoor radiometer...

BORCAL-LW

Broadband Outdoor Radiometer Calibration

Calibration date

02/09/2015 to 03/04/2015

Calibration Facility

Southern Great Plains

Longitude: 97.488°W

Latitude: 36.605°N

Elevation: 317.0 meters AMSL

Report Date

March 4, 2015

2015-01

Time Zone: -6.0

Longwave

NOTICE

This report was prepared as an account of work sponsored by an agency of the United States government. Neither the

United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or

assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus,

product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any

specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not

necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any

agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United

States government or any agency thereof.

Broadband Outdoor Radiometer Calibration Report

Table of contents

Control Instrument history plots...................................................................................................................................................................

Results summary.........................................................................................................................................................................................

Appendix 1 Instrument Details.....................................................................................................................................................................

Appendix 3 Session Configuration Audit Report..........................................................................................................................................

4

5

A1-1

A3-1

BORCAL-LW 2015-01 / Full Report

Appendix 2 BORCAL Notes.........................................................................................................................................................................A2-1

Introduction.................................................................................................................................................................................................3

Introduction

BORCAL-LW 2015-01 / Full Report 3

This report compiles the calibration results from a Broadband Outdoor Radiometer Calibration (BORCAL). The work was

accomplished at the Radiometer Calibration Facility shown on the front of this report. The calibration results reported here

are traceable to the World Infrared Standard Group (WISG).

This report includes these sections:

Environmental and Sky Conditions - meteorological conditions and reference irradiance during the calibration event.

Control Instruments - a group of instruments included in each BORCAL event that provides a measure of process

consistency.

Results Summary - a table of all instruments included in this report summarizing their calibration results and

uncertainty.

Instrument Details - the calibration certificates and application notes for each instrument.

Control Instrument History

-2.0

-5.0

-4.5

-4.0

-3.5

-3.0

-2.5

2015-01

Figure 1. Eppley PIR Control Instrument History (K0 Coefficient)

BORCAL

K0 (

W/m

²)

4

0.27

0.23

0.24

0.25

0.26

2015-01


BORCAL

K1 (

W/m

²/µ

V)

1.020

1.000

1.005

1.010

1.015

2015-01


BORCAL

K2 (

unitle

ss)

31206F3 31237F3

31206F3 31237F3

31206F3 31237F3


-3.36

-3.40

-3.39

-3.38

-3.37

2015-01


BORCAL

K3 (

unitle

ss)

31206F3 31237F3

K0 K1 K2 K3 Kr * U95

Instrument Customer (W/m²) (W/m²/µV) (K/µV) (W/m²) Page

31206F3 Calibration System -5.0471 0.26768 1.0141 -3.3694 7.044e-4 ±1.69 A1-2

31237F3 Calibration System -1.9892 0.23228 1.0071 -3.3926 7.044e-4 ±1.69 A1-5

32309F3 Reda-NREL -7.0418 0.20916 1.0194 -3.0895 7.044e-4 ±1.69 A1-8

36362F3 Reda-NREL -0.62447 0.32378 1.0127 -5.4039 7.044e-4 ±1.76 A1-11

Table 1. Results Summary

Results Summary

5BORCAL-LW 2015-01 / Full Report

Note: Environmental Conditions for BORCAL starts on page A1-14. * Kr used to derive K0,K1,K2, and K3

Appendix 1

Calibration Certificates: 3 pages for each radiometer (4 including Environmental Conditions)

Instrument Details

A1-1

Environmental Conditions for BORCAL: Last Page of a Calibration Certificate. Note: This appears only once, at the end of Appendix 1.


Southern Great Plains Radiometer Calibration Facility

Test Instrument: Downwelling Pyrgeometer

Measurement Type Instrument Calibration Date Calibration Due Date

Data Acquisition NREL Data Acquisition System Model RAP-DAQ, S/N 2014-1302 01/30/2015 01/30/2016

Infrared Irradiance ‡ Eppley Downwelling Pyrgeometer Model PIR, S/N 30557F3 01/26/2015 01/26/2020


Table 1. Traceability

National Renewable Energy Laboratory

Metrology Laboratory

Calibration Certificate

Model: PIR

Calibration Date: 3/4/2015

Customer: Calibration System Environmental Conditions: see page 4

Manufacturer: Eppley

Serial Number: 31206F3

Due Date: 3/4/2017

Setup: Radiometers are calibrated outdoors, using the atmosphere as the source. Pyranometers and pyrgeometers are installed for

Number of pages of certificate: 4

Calibration Procedure:

consistent with the Guide to the Expression of Uncertainty in Measurement (GUM) using Reda et al., 2008. All nominal values are traceable to the

Michael Dooraghi, Technical Manager

_____________________________________________________________

For questions or comments, please contact the technical manager at:

Date

____________________

Calibrated by: Afshín M. Andreas and Craig Webb

Page 1 of 4BORCAL-LW 2015-01 / Certificate Southern Great Plains 31206F3 Eppley PIR

A1-2

Test Dates: 2/9-17, 2/25-28, 3/1-4

‡ Through the World Infrared Standard Group (WISG)

World Infrared Standard Group (WISG).

No statement of compliance with specifications is made or implied on this certificate. However, the estimated uncertainties are the uncertainties of the

calibration process; users must add other uncertainties that are relevant to their measuring system, environmental and sky conditions, outdoor set-up,

and site location.

This certificate applies only to the item identified above and shall not be reproduced other that in full, without specific written approval from the

calibration facility. Certificate without signature is not valid.

This certifies that the above product was calibrated in compliance with procedure listed below. Measurement uncertainties at the time of calibration are

SGP BORCAL-LW Calibration Procedure

horizontal measurements, with their signal connectors oriented north, if their design permits.

[email protected]; 303-384-6329; 15013 Denver West Parkway, Golden, CO 80401, USA

Calibration Results


0.6

-0.5

-0.4

-0.3

-0.2

-0.1

-0.0

0.1

0.2

0.3

0.4

0.5

25.7-363.0 -300.0 -250.0 -200.0 -150.0 -100.0 -50.0 0.0

Figure 1. Residuals for calc. vs ref. irradiance using K0<>0 Coefficients

Thermopile Voltage (µV)

Re

sid

ua

ls (

W/m

²)31206F3 Eppley PIR

A1-3

The incoming irradiance (Win) of the test instrument during calibration is calculated using this Measurement Equation:

where,

Wr = σ * Tr^4

V

K0,K1,K2,K3 = receiver irradiance (W/m²),

= thermopile output voltage (µV),

= calibration coefficeints,

[1]

Wd = σ * Td^4 = dome irradiance (W/m²),

σ

Win = K0 + K1*V + K2*Wr + K3*(Wd - Wr)

Tr = Tc + Kr * V = receiver temperature (K),

Tc = case temperature (K),

where, = 5.6704e-8 W·m-2·K-4,

Type-B Standard Uncertainty, u(B) (W/m²) ±0.84

Type-A Standard Uncertainty, u(A) (W/m²) ±0.18

Combined Standard Uncertainty, u(c) (W/m²) ±0.86

Effective degrees of freedom, DF(c) +Inf

Coverage factor, k 1.96

Expanded Uncertainty, U95 (W/m²) ±1.69

Table 4. Uncertainty using K0<>0 Coefficients

1.3

-1.0

-0.8

-0.6

-0.4

-0.2

-0.0

0.2

0.4

0.6

0.8

1.0

26.5-363.0 -300.0 -250.0 -200.0 -150.0 -100.0 -50.0 0.0

Figure 2. Residuals for calc. vs ref. irradiance using K0=0 Coefficients


Re

sid

ua

ls (

W/m

²)

Kr = efficiency coefficient (K/µV).

Tdwhere, = dome temperature (K),

K0 -5.0471

K1 0.26768

K2 1.0141

K3 -3.3694

Kr used to derive coefficients 0.00070440

Table 2. Calibration Coefficients for K0<>0







Table 5. Uncertainty using K0=0 Coefficients

K0 0

K1 0.26685

K2 0.99743

K3 -3.3932


Table 3. Calibration Coefficients for K0=0

±U(A)±U(A)

1.020

0.990

0.995

1.000

1.005

1.010

1.015

2015-01

Figure 5. History of instrument (K2 Coefficient)

BORCAL

K2

(u

nitle

ss)


A1-4

K0 <> 0 K0 = 0

[1] Reda, I.; Stoffel, T. (2010). Pyrgeometer Calibration for DOE-Atmospheric System Research Program using NREL Method (Presentation). 9 pp.;

References:

NREL Report No. PR-3B0-47756; http://www.nrel.gov/docs/fy10osti/47756.pdf.

-5.040

-5.050

-5.048

-5.046

-5.044

-5.042

2015-01


BORCAL

K0

(W

/m²)

K0 <> 0

0.2677

0.2668

0.2669

0.2670

0.2671

0.2672

0.2673

0.2674

0.2675

0.2676

2015-01


BORCAL

K1

(W

/m²/

µV

)

K0 <> 0 K0 = 0

-3.360

-3.400

-3.395

-3.390

-3.385

-3.380

-3.375

-3.370

-3.365

2015-01


BORCAL

K3

(u

nitle

ss)

K0 <> 0 K0 = 0











Model: PIR


Customer: Calibration System Environmental Conditions: see page 4



Due Date: 3/4/2017






_____________________________________________________________


Date

____________________



A1-5

Test Dates: 2/9-17, 2/25-28, 3/1-4





and site location.







Calibration Results


0.6

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

-0.0

0.1

0.2

0.3

0.4

0.5

29.8-422.1 -350.0 -300.0 -250.0 -200.0 -150.0 -100.0 -50.0 0.0



Re

sid

ua

ls (

W/m


A1-6


where,

Wr = σ * Tr^4

V




[1]


σ

Win = K0 + K1*V + K2*Wr + K3*(Wd - Wr)



where, = 5.6704e-8 W·m-2·K-4,








0.7

-0.7

-0.6

-0.4

-0.2

-0.0

0.2

0.4

0.6

29.8-417.0 -350.0 -300.0 -250.0 -200.0 -150.0 -100.0 -50.0 0.0



Re

sid

ua

ls (

W/m

²)



K0 -1.9892

K1 0.23228

K2 1.0071

K3 -3.3926










K0 0

K1 0.23169

K2 1.0006

K3 -3.7204



±U(A)±U(A)

1.010

1.000

1.002

1.004

1.006

1.008

2015-01


BORCAL

K2

(u

nitle

ss)


A1-7

K0 <> 0 K0 = 0


References:


-1.980

-1.990

-1.988

-1.986

-1.984

-1.982

2015-01


BORCAL

K0

(W

/m²)

K0 <> 0

0.2323

0.2316

0.2317

0.2318

0.2319

0.2320

0.2321

0.2322

2015-01


BORCAL

K1

(W

/m²/

µV

)

K0 <> 0 K0 = 0

-3.39

-3.73

-3.70

-3.65

-3.60

-3.55

-3.50

-3.45

2015-01


BORCAL

K3

(u

nitle

ss)

K0 <> 0 K0 = 0











Model: PIR


Customer: Reda-NREL Environmental Conditions: see page 4



Due Date: 3/4/2017






_____________________________________________________________


Date

____________________



A1-8

Test Dates: 2/9-17, 2/25-28, 3/1-4





and site location.







Calibration Results


0.6

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

-0.0

0.1

0.2

0.3

0.4

0.5

29-459 -400 -300 -200 -100 0



Re

sid

ua

ls (

W/m


A1-9


where,

Wr = σ * Tr^4

V




[1]


σ

Win = K0 + K1*V + K2*Wr + K3*(Wd - Wr)



where, = 5.6704e-8 W·m-2·K-4,








1.60

-1.40

-1.25

-1.00

-0.75

-0.50

-0.25

0.00

0.25

0.50

0.75

1.00

1.25

29-464 -400 -300 -200 -100 0



Re

sid

ua

ls (

W/m

²)



K0 -7.0418

K1 0.20916

K2 1.0194

K3 -3.0895










K0 0

K1 0.20880

K2 0.99647

K3 -2.6289



±U(A)±U(A)

1.020

0.990

0.995

1.000

1.005

1.010

1.015

2015-01


BORCAL

K2

(u

nitle

ss)


A1-10

K0 <> 0 K0 = 0


References:


-7.040

-7.050

-7.048

-7.046

-7.044

-7.042

2015-01


BORCAL

K0

(W

/m²)

K0 <> 0

0.20920

0.20880

0.20885

0.20890

0.20895

0.20900

0.20905

0.20910

0.20915

2015-01


BORCAL

K1

(W

/m²/

µV

)

K0 <> 0 K0 = 0

-2.62

-3.09

-3.05

-3.00

-2.95

-2.90

-2.85

-2.80

-2.75

-2.70

2015-01


BORCAL

K3

(u

nitle

ss)

K0 <> 0 K0 = 0











Model: PIR


Customer: Reda-NREL Environmental Conditions: see page 4



Due Date: 3/4/2017






_____________________________________________________________


Date

____________________



A1-11

Test Dates: 2/9-17, 2/25-28, 3/1-4





and site location.







Calibration Results


0.9

-1.0

-0.8

-0.6

-0.4

-0.2

-0.0

0.2

0.4

0.6

0.8

22.5-309.9 -250.0 -200.0 -150.0 -100.0 -50.0 0.0



Re

sid

ua

ls (

W/m


A1-12


where,

Wr = σ * Tr^4

V




[1]


σ

Win = K0 + K1*V + K2*Wr + K3*(Wd - Wr)



where, = 5.6704e-8 W·m-2·K-4,








1.0

-1.0

-0.8

-0.6

-0.4

-0.2

-0.0

0.2

0.4

0.6

0.8

23.3-309.9 -250.0 -200.0 -150.0 -100.0 -50.0 0.0



Re

sid

ua

ls (

W/m

²)



K0 -0.62447

K1 0.32378

K2 1.0127

K3 -5.4039










K0 0

K1 0.32394

K2 1.0110

K3 -5.6386



±U(A)±U(A)

1.020

1.010

1.012

1.014

1.016

1.018

2015-01


BORCAL

K2

(u

nitle

ss)


A1-13

K0 <> 0 K0 = 0


References:


-0.620

-0.630

-0.628

-0.626

-0.624

-0.622

2015-01


BORCAL

K0

(W

/m²)

K0 <> 0

0.32400

0.32370

0.32375

0.32380

0.32385

0.32390

0.32395

2015-01


BORCAL

K1

(W

/m²/

µV

)

K0 <> 0 K0 = 0

-5.40

-5.64

-5.60

-5.55

-5.50

-5.45

2015-01


BORCAL

K3

(u

nitle

ss)

K0 <> 0 K0 = 0

Environmental and Sky Conditions for BORCAL-LW 2015-01

Calibration Facility:

Meteorological Observations (hourly averages):

Reference Irradiance (hourly averages):

Observations Mean Min Max

Temperature (°C) 0.06 -6.66 13.60

Humidity (%) 76.55 37.47 98.33

Pressure (mBar) N/A N/A N/A

Est. Precipitable Water Vapor (mm) 8.7 4.2 14.5

Table 6. Meteorological Observations


Longitude: 97.488°WLatitude: 36.605°N Elevation: 317.0 meters AMSL

400

200

220

240

260

280

300

320

340

360

380

04-Mar-201509-Feb-2015 13-Feb-2015 15-Feb-2015 17-Feb-2015 20-Feb-2015 22-Feb-2015 24-Feb-2015 27-Feb-2015 01-Mar-2015

Figure 6. Reference Irradiance

Date

Irra

dia

nce

(W

/m²)

20

-10

-5

0

5

10

15

04-Mar09-Feb 12-Feb 15-Feb 18-Feb 21-Feb 24-Feb 27-Feb

Figure 7. Temperature

Date

Te

mp

era

ture

(°C

)

100

40

50

60

70

80

90


Figure 8. Humidity

Date

Hu

mid

ity (

%)

Page 4 of 4BORCAL-LW 2015-01 / Certificate

For other information about the calibration facility visit: http://www.arm.gov/docs/sites/sgp/sgp.html


55.00

45.00

46.00

48.00

50.00

52.00

54.00

01-Jan01-Jan 01-Jan 01-Jan 01-Jan

No Data

Figure 9. Pressure

Date

Pre

ssu

re (

mB

ar)

Time Zone: -6.0

A1-14

20

0

5

10

15


Figure 10. Estimated Precipitable Water Vapor (PWV)

Date

Estim

ate

d P

WV

(m

m)

Appendix 2

Instrument, Configuration, and Session Notes for the BORCAL

BORCAL Notes

A2-1BORCAL-LW 2015-01 / Full Report

BORCAL Notes


________________________________________________________________________________________________________

Facility: Southern Great Plains

Comments:

Avg. Station Pressure and Temperature is for Tulsa, OK, which is used for the Solar Position Algorithm

(SPA).

Appendix 3

Latest Session Configuration Audit Report for the BORCAL

Session Configuration Audit Report


BORCAL/LW 2015-01 Session Configuration Audit Report

A3-2BORCAL/LW 2015-01 Session Configuration Audit Report Southern Great Plains

Delta Thresholds

300Scan Rate (s)

% Error Thresholds

2.0Ref Pyg Stability

5.0TP(x) / TP(x-1)

5.0Temp(x) - Temp(x-1)

10.0Hum(x) - Hum(x-1)

5.0Bar(x) - Bar(x-1)0Warning Threshold (s)

Clock

0Reset Interval (m)

SYSTEM

Junction Box

red

Cable

T8-1

Location

37

Channel

blue T8-138

Temperature: E0710026T Vaisala HMP155 T

Humidity: E0710026H Vaisala HMP155 H

Pressure: None

METEOROLOGICAL INSTRUMENTS


Facility

36.605

Latitude

-97.488

Longitude

317.0

Elevation (m)

-6.0

Time zone

Craig Webb

Contact

LOCATION

GPS TIME RECIEVER

GPS: None

Type

0

Port

0

Baud

000

ParityParityParity

000

Stop bitsStop bitsStop bits

000

Data bitsData bitsData bits

992.0

Avg press (mbr)

SGP

Facility Abbrev.

Misc

2Uncert. Dec. Precision

15.0

Avg temp (C)

-0.300Delta UT1

03/04/2015 14:40

01/30/2015Cal Date

01/30/2016Cal Due Date

DATALOGGER

5.30Volts DC (µV)

2100.002-Wire Res. (mOhms)

0.004-Wire Res. (mOhms)

System Offsets:

Unit 0 Unit 0Unit 0Unit 0

2014-1302 NREL RAP-DAQ

Logger/Relay

SG42000596 Agilent 34420A

DMM

None None

None None

None None

Unit 0

Unit 0Unit 0Unit 0

Unit 0Unit 0Unit 0

Unit 0Unit 0Unit 0

Unit 0Unit 0Unit 0 Unit 0Unit 0Unit 0

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

DMM

Relay

Unit Type Addr. Board Parity Stop Data

0 GPIB 1 0 000 000 000

0 GPIB 4 1 000 000 000

-1-1-1 000 000 000 000 000

-1-1-1 000 000 000 000 000

-1-1-1 000 000 000 000 000

-1-1-1 000 000 000 000 000

-1-1-1 000 000 000 000 000

-1-1-1 000 000 000 000 000

Communications

10.0Thrm(x) - Temp(x)

ISO

0Scale 0Offset

100Scale 0Offset

100Scale -40Offset

Auto Mode Zenith Angle

94Afternoon Startup

94Morning Shutdown

0.5667Atmos. Refraction (deg)

Solar Position Algorithm

67.484Delta T (s)

Analysis Rejection

1.000Threshold 1 (Blue)

2.000Threshold 2 (Green)

3.000Threshold 3 (Brown)

3No. of Std. Dev.



03/04/2015 14:40

Calibration Coefficients

01/26/2015

Cal Date

01/26/2020

Cal Due Date

PYRGEOMETER REFERENCE INSTRUMENTS

Junction Box

2

Cable

T5-2

Location

5

Channel

Pyrgeometer 1: 30557F3 Eppley PIR

24

26

1.67

(W/m^2)

-8.34767

K0

0.21477

K1

1.02659

K2

-3.27118

K3

7.04400E-4

Kr

Uncert.

Pyrgeometer 1: Case Thermistor

Pyrgeometer 1: Dome Thermistor

Active

Pyrgeometer 2: 31197F3 Eppley PIR

01/26/2015 01/26/2020 -0.28910 0.23782 1.00487 -2.88000 7.04400E-4 1.21 17 2 T6-2

Pyrgeometer 2: Case Thermistor 16 2

Pyrgeometer 2: Dome Thermistor 18 2



Serial Number Customer Mfg RS Ch Box Cable Act ISO AIM Stickr Vent Use Kr Location Due

31206F3 ‡ Calibration System 3.5000 1 1 Yes No Yes K0=0 No PYG 7.044e-4 T5-1 24

(Case 10K Temperature) 0 1

(Dome 10K Temperature) 2 1

31237F3 ‡ Calibration System 3.9100 13 1 Yes No Yes K0=0 No PYG 7.044e-4 T6-1 24


(Dome 10K Temperature) 14

32309F3 Reda-NREL 4.2600 9 3 Yes No Yes K0<>0 No PYG 7.044e-4 T5-3 24


(Dome 10K Temperature) 10

36362F3 Reda-NREL 3.0300 21 3 Yes No Yes K0<>0 No PYG 7.044e-4 T6-3 24


(Dome 10K Temperature) 22 3

INSTRUMENTS

‡ Control Instrument

03/04/2015 14:40

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