| viXra.org > Astrophysics > viXra:1310.0124 |
 |
 |
| viXra.org > Astrophysics > viXra:1310.0124 |
|
|
Astrophysics |
|
Authors: Pierre-Marie Robitaille
Microwave reference blackbodies and targets play a key role in astrophysical and geophysical studies. The emissivity of these devices is usually inferred from return-loss experiments which may introduce at least 10 separate types of calibration errors. The origin of these inaccuracies depends on test conditions and on the nature of each target. The most overlooked errors are related to the geometry adapted in constructing reference loads and to the effects of conduction or convection. Target shape and design can create an imbalance in the probabilities of absorption and emission. This leads to loss of radiative equilibrium, despite the presence of a thermodynamic steady state. Heat losses or gains, through conduction and convection, compensate for this unexpected physical condition. The improper calibration of blackbodies and targets has implications, not only in global climate monitoring, but also relative to evaluating the microwave background
Comments: 8 Pages. First published in: Progress in Physics, 2010, v. 3, 3-10.
Download: PDF
[v1] 2013-10-15 14:39:09
Unique-IP document downloads: 386 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.
| Third-Party Links: |
|