From NASA Technical Reports Server (NTRS)
In 2015, Timothy K. Risch of NASA developed two technical articles that are available on the NASA Technical Reports Server (NTRS).
Both articles may be freely downloaded from NTRS in various formats, as long as the NASA Server maintains their presence.
As far as we know these are royalty free and the only stipulation that NASA usually requires is an attribution. These are below in the form of links to the article on the NASA web site.
The articles are entitled:
We have reviewed these documents and find them to be an excellent summary of this temperature measurement method and have archived them on our site in two formats, mobi, suitable for reading on an E-reader and in Adobe pdf format.
Part 1 provides and Overview, Nomenclature, a bit about what temperature is and the history of measurement methods and delves into the physics underlying Radiation Thermometry.
Part II covers practical radiation thermometers, some detail on measurement techniques and calibration and a brief reference list.
These files are linked below many be freely downloaded as long as we maintain this website.
The NASA description for both article reads as follows:
This document is a two-part course on the theory and practice of radiation thermometry.
Radiation thermometry is the technique for determining the temperature of a surface or a volume by measuring the electromagnetic radiation it emits.
This course covers the theory and practice of radiative thermometry and emphasizes the modern application of the field using commercially available electronic detectors and optical components.
The course covers the historical development of the field, the fundamental physics of radiative surfaces, along with modern measurement methods and equipment.
NASA Technical Reports Server (NTRS) 20150021314 Understanding Radiation Thermometry. Part I NASA Technical Reports Server (NTRS) Free Download & Streaming Internet Archive
Sources on the NASA Technical Reports Server: