درباره ما
ITU-R P.676-10
Attenuation by atmospheric gases
Year: 2013
Abstract: This Recommendation provides methods to estimate the attenuation of atmospheric gases on terrestrial and slant paths using:
a) an estimate of gaseous attenuation computed by summation of individual absorption lines that is valid for the frequency range 1-1 000 GHz; and
b) a simplified approximate method to estimate gaseous attenuation that is applicable in the frequency range 1-350 GHz.
The ITU Radiocommunication Assembly,
considering
a) the necessity of estimating the attenuation by atmospheric gases on terrestrial and slant paths,
recommends
1 that, for general application, the procedures in Annex 1 be used to calculate gaseous attenuation at frequencies up to 1 000 GHz;
2 that, for approximate estimates of gaseous attenuation in the frequency range 1 to 350 GHz, the computationally less intensive procedure given in Annex 2 be used.
a) an estimate of gaseous attenuation computed by summation of individual absorption lines that is valid for the frequency range 1-1 000 GHz; and
b) a simplified approximate method to estimate gaseous attenuation that is applicable in the frequency range 1-350 GHz.
The ITU Radiocommunication Assembly,
considering
a) the necessity of estimating the attenuation by atmospheric gases on terrestrial and slant paths,
recommends
1 that, for general application, the procedures in Annex 1 be used to calculate gaseous attenuation at frequencies up to 1 000 GHz;
2 that, for approximate estimates of gaseous attenuation in the frequency range 1 to 350 GHz, the computationally less intensive procedure given in Annex 2 be used.
Show full item record
| contributor author | ITU-R - International Telecommunication Union/ITU Radiocommunication Sector | |
| date accessioned | 2017-09-04T18:16:02Z | |
| date available | 2017-09-04T18:16:02Z | |
| date copyright | 2013.09.01 | |
| date issued | 2013 | |
| identifier other | HLWVGFAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=autho47037D8369B/handle/yse/198958 | |
| description abstract | This Recommendation provides methods to estimate the attenuation of atmospheric gases on terrestrial and slant paths using: a) an estimate of gaseous attenuation computed by summation of individual absorption lines that is valid for the frequency range 1-1 000 GHz; and b) a simplified approximate method to estimate gaseous attenuation that is applicable in the frequency range 1-350 GHz. The ITU Radiocommunication Assembly, considering a) the necessity of estimating the attenuation by atmospheric gases on terrestrial and slant paths, recommends 1 that, for general application, the procedures in Annex 1 be used to calculate gaseous attenuation at frequencies up to 1 000 GHz; 2 that, for approximate estimates of gaseous attenuation in the frequency range 1 to 350 GHz, the computationally less intensive procedure given in Annex 2 be used. | |
| language | English | |
| title | ITU-R P.676-10 | num |
| title | Attenuation by atmospheric gases | en |
| type | standard | |
| page | 24 | |
| status | Active | |
| tree | ITU-R - International Telecommunication Union/ITU Radiocommunication Sector:;2013 | |
| contenttype | fulltext |