|
| Comparative Calibration Method Between two Different Wavelengths With Aureole Observations at Relatively Long Wavelength
|
|
Full
text: |
 PDF(914.8KB) |
|
|
Source |
International Journal of Applied Sciences (IJAS) |
|
Table of Contents |
|
|
Download
Complete Issue PDF(6.22MB) |
|
Volume: 2 Issue: 3 |
| |
Pages: NULL |
|
Publication
Date: July / August 2011 |
|
ISSN
(Online): 2180-1258 |
|
|
|
|
|
Pages |
93 - 101 |
|
Author(s) |
|
|
|
Published
Date |
05-08-2011 |
|
Publisher |
CSC
Journals, Kuala Lumpur,
Malaysia |
|
ADDITIONAL
INFORMATION |
| Keywords Abstract References Cited by Related Articles Collaborative
Colleague |
| |
|
| |
KEYWORDS: Sunphotometer, Calibration, Langley Method, Modified Langley Method, Aureole, Optical Depth |
|
|
| |
|
|
| This Manuscript is indexed in the following databases/websites:- |
|
| 1. Directory of Open Access Journals (DOAJ) |
| 2. Scribd |
| 3. Google Scholar |
| 4. Docstoc |
| |
|
| |
|
|
| A multi-stage method for calibration of sunphotometer is proposed by combining comparison calibration method between two different wavelengths with aureole observation method for long wavelength calibration. Its effectiveness in reducing the influences for calibration due to molecular and aerosolfs extinction in the unstable turbidity conditions is clarified. By comparing the calculated results with the proposed method and the existing individually calibration method, it is found that the proposed method is superior to the existing method in terms of calibration accuracy. Namely, Through a comparison between ILM and the proposed method using band 0.87um as reference, the largest calibration errors are 0.0014, 0.0428 by PM are lower than that by ILM (0.011,0.0489) for sky radiances with no error and -3~+3%, -5~+5% errors. By analyzing the observation data of 15 days with POM-1 Skyradiometer, the largest standard deviation of calibration constants by PM is 0.02016, and is lower than that by ILM (0.03858). |
| |
|
| |
|
| |
| |
|
| |
|
| |
| |
|
| |
|
| |
| |
|
| |
|
| |
|
| Kohei Arai : Colleagues
|
|
| Xing Ming Liang : Colleagues
|
|
