Authors: Glen Gilchrist
Surface albedo is an important concept, useful in explaining how closed systems (such as the Earth - Atmosphere) respond to incident radiant energy. Specialist, calibrated equipment is used by geo-scientists to measure ambient and reflected radiation from subject sources - this is often cost prohibitive within a teaching environment. A "semi" calibrated method is presented, utilising simple digital photography of both reference and subject sample. Using the "levels" function built into freely available image editing software, a simple algorithm is presented that allows a relative reflectance of the sample image to be calculated. Processing this with relation to a calibrated image allows for the simple determination of surface albedo. Using this method, albedo levels within 3% of a calibrated meter are obtained.
Comments: 6 pages
[v1] 9 Oct 2011
Unique-IP document downloads: 13410 times
Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.
Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.