| qp_uvb313_temp.spct {photobiologyLamps} | R Documentation |
Spectral irradiance of UVB lamps at different temperatures.
Description
Dataset of spectral irradiance from a set of two Q-Panel UVB-313 40W fluorescent tubes, measured at different temperatures.
Usage
qp_uvb313_temp.spct
qp_uvb313_temp.mspct
Format
qp_uvb313_temp.spct is a "source_spct" object with 777 rows (290 nm to 400 nm, 1.0 nm step) and 3
variables.
The variables are as follows:
temperature (C)
w.length (nm)
s.e.irrad (W m-2 nm-1)
qp_uvb313_temp.mspct is a "source_mspct" object containing a
collection of
"source_spct" objects, each with 111 rows (290 nm to 400 nm,
1.0 nm step) and 2 variables.
The variables in the member spectra are as follows:
w.length (nm)
s.e.irrad (W m-2 nm-1)
An object of class source_mspct (inherits from generic_mspct, list) with 7 rows and 1 columns.
Details
Absolute values are comparable among the different temperatures. The lamps and the cosine diffuser were located inside a Conviron growth chamber. The measurements were done with a recently calibrated Macam double-monochromator spectroradiometer located outside the chamber and maintained at constant room temperature of 22 C. After each change in the temperature controller set-point enough time was allowed after the temperature had stabilized inside the chamber, for the output of the lamps to also become stable.
qp_uvb313_temp.spct contains data for different
temperatures in a "tidy" long form with a factor indicating the temperature
at which the lamp was during measurement.
qp_uvb313_temp.mspct
contains the same data as a collection of spectra stored in a
"source_mspct" object, with member "source_spct" objects
named minus5C, plus00C, plus05C, plus10C, plus20C, plus30C, and plus35C.
Note
Instrument used: Macam SR-9010-PC scanning double monochromator spectroradiometer with a cosine corrected input optics. Recently calibrated. The lamps were driven by a high frequency electronic ballast.
References
Aphalo, P J, R Tegelberg, and R Julkunen-Tiitto. 1999. The Modulated UV-B Irradiation System at the University of Joensuu. Biotronics 28: 109–120. https://cir.nii.ac.jp/crid/1050001335921484032?lang=en.
Examples
qp_uvb313_temp.mspct[["plus20C"]]