 |
| Titel |
Development of radio acoustic sounding system (RASS) with Gadanki MST radar – first results |
| VerfasserIn |
T. V. Chandrasekhar Sarma, D. Narayana Rao, J. Furumoto, T. Tsuda |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 9 ; Nr. 26, no. 9 (2008-09-01), S.2531-2542 |
| Datensatznummer |
250016208
|
| Publikation (Nr.) |
 copernicus.org/angeo-26-2531-2008.pdf |
|
|
|
|
|
| Zusammenfassung |
| A high-power acoustic exciter was designed and developed for the Gadanki MST Radar
to facilitate observations in the Radio Acoustic Sounding System (RASS) mode. Sweep
range of acoustic signal frequencies was set to 94–125 Hz so as to satisfy Bragg matching
condition for temperature range of −90°–40°C between surface and the tropopause
(about 17 km). Raytracing of acoustic wave propagation was used to predict the antenna
beam directions along which optimum RASS echoes could be obtained. During the
RASS observation period of about 18 h on 23–24 July 2006 height profiles of
atmospheric virtual temperature were obtained between 1.5 km and 10 km and
occasionally up to 14 km. In comparison with the three simultaneous radiosonde
launches, RASS derived temperature profiles had the r.m.s. discrepancy of about 1 K,
although deviation of the RASS results sometimes appeared when the radial wind
velocity was not fully available for the correction of apparent sound speed. This study has
successfully demonstrated capability of the RASS application with the Gadanki MST
radar, which will be used for continuous monitoring of the temperature profiles in the
troposphere and lower stratosphere region in the tropics. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|