Note

Check the supplementary info below for important information on the data.

3.24.1. SPN1

3.24.1.1. Introduction

SPN1 sunshine pyranometer from Delta-T. It measures shortwave and diffuse irradiance. It derives diffuse from direct radiation using seven thermopile sensors and a shading pattern. One has been deployed at KSS45W and IMU.

3.24.1.2. Manufacturer and Model

Model	Brand	Type
SPN1	Delta-T	Sunshine Pyranometer

3.24.1.3. Output definitions

Ouput definition ID	File Identifier	Level Number	QAQC notes	File time resolution
SPN	SPN1_%SITE	0	No_QAQC	15min
SPN	SPN1_%SITE	1	Thresholds	15min

3.24.1.4. Variables measured by instrument

Table 3.21 Variables measured - sorted alphabetically

Variable ID	Full Name	Unit	Lower Threshold	Upper Threshold	Files present (Output definition ID,Level No,Time resolution)
FLAG	Status flag	N/A			SPN,1,15min
Kdiff	diffuse_shortwave_radiation	W.m-2	0.0	1200.0	SPN,0,15min SPN,1,15min
Kdn	incoming_shortwave_radiation	W.m-2	0.0	1200.0	SPN,0,15min SPN,1,15min
sd_Kdiff	standard_deviation_diffuse_shortwave_radiation	W.m-2			SPN,0,15min SPN,1,15min
sd_Kdn	incoming_shortwave_radiation	W.m-2			SPN,0,15min SPN,1,15min
Sun	sunshine_status	%	0.0	100.0	SPN,0,15min SPN,1,15min

3.24.1.5. Serials

Serial	Suffix
A517	A

3.24.1.6. Deployments

3.24.1.6.1. Serial number: A517

Site ID	Start date	End date
KSS45W	2011-01-14 00:00	2016-04-14 00:00
IMU	2016-05-04 00:00	2020-11-04 00:00

3.24.1.7. Photos

Fig. 3.66 At KSS45W. Unknown date between 2012-02-27 and 2016-04-14.

Fig. 3.67 At IMU, indicated by arrow, 08-01-2020.

3.24.1.8. Supplementary information

Link	Title	Description
https://www.delta-t.co.uk/wp-content/uploads/2019/06/SPN1_User_Manual_4.2.pdf	SPN1 manual	Manual from Delta-T
SPN1 datasheet	SPN1 datasheet	From Delta-T.
IMU PSP and SPN1 radiation sensor blocking	IMU PSP and SPN1 radiation sensor blocking	Details of suspected interference of measurements by PSP and SPN1 at IMU by telecommunications equipment.

3.24.1.9. Data acquisition

Data can be requested from Prof. Sue Grimmond (c.s.grimmond@reading.ac.uk).

Tip

1. Stuck? the user guide is a useful place to start.

2. Please report issues at GitHub Issues. Go from the page with the problem - an automatic link will be inserted. Thanks.