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| Titel |
An introduction to the FY3 GNOS instrument and mountain-top tests |
| VerfasserIn |
W. H. Bai, Y. Q. Sun, Q. F. Du, G. L. Yang, Z. D. Yang, P. Zhang, Y. M. Bi, X. Y. Wang, C. Cheng, Y. Han |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 6 ; Nr. 7, no. 6 (2014-06-24), S.1817-1823 |
| Datensatznummer |
250115826
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| Publikation (Nr.) |
 copernicus.org/amt-7-1817-2014.pdf |
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| Zusammenfassung |
| The FY3 (Feng-Yun-3) GNOS (GNSS Occultation Sounder) mission is a GNSS
(Global Navigation Satellite System) radio occultation mission of China for
remote sensing of Earth's neutral atmosphere and the ionosphere. GNOS will
use both the global positioning system (GPS) and the Beidou navigation
satellite systems on the China Feng-Yun-3 (FY3) series satellites. The first
FY3-C was launched at 03:07 UTC on 23 September 2013. GNOS was developed by the
Center for Space Science and Applied Research, Chinese Academy of Sciences
(CSSAR). It will provide vertical profiles of atmospheric temperature,
pressure, and humidity, as well as ionospheric electron density profiles on a
global basis. These data will be used for numerical weather prediction,
climate research, and ionospheric research and space weather. This paper
describes the FY3 GNOS mission and the GNOS instrument characteristics. It
presents simulation results of the number and distribution of GNOS
occultation events with the regional Beidou constellation and the full GPS
constellation, under the limitation of the GNOS instrument occultation
channel number. This paper presents the instrument performance as derived
from analysis of measurement data in laboratory and mountain-based
occultation validation experiments at Mt. Wuling in Hebei Province. The
mountain-based GNSS occultation validation tests show that GNOS can acquire
or track low-elevation radio signal for rising or setting occultation events.
The refractivity profiles of GNOS obtained during the mountain-based
experiment were compared with those from radiosondes. The results show that
the refractivity profiles obtained by GNOS are consistent with those from the
radiosonde. The rms of the differences between the GNOS and radiosonde
refractivities is less than 3%. |
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