 |
| Titel |
Performance simulation of a spaceborne infrared coherent lidar for measuring tropospheric wind profiles. |
| VerfasserIn |
Philippe Baron, Shoken Ishii, Gamo Kyoka, Kohei Mizutani, Takahashi Chikako, Toshikazu Itabe, Toshiki Iwasaki, Takuji Kubota, Kozo Okamoto, Riko Oki, Masaki Satoh, Yohei Satoh |
| Konferenz |
EGU General Assembly 2014
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250089062
|
| Publikation (Nr.) |
 EGU/EGU2014-3250.pdf |
|
|
|
|
|
| Zusammenfassung |
| An effort has begun in Japan to develop a spaceborne instrument for measuring tropospheric
winds. This project is a collaboration between the Japan Aerospace Exploration Agency
(JAXA), the Meteorological Research Institute (MRI, Japan) and the National Institute of
Information and Communications Technology (NICT, Japan) [1,2]. The aim is to measure the
horizontal wind field in the troposphere on a global scale with a precision better than 3 ms-1,
and a vertical and horizontal (along the satellite ground track) resolution better than 1 km and
100 km, respectively. In order to support the definition and the development of the
instrument, an end-to-end simulator has been implemented including modules for i)
simulating the time-dependent laser shot return power, ii) for averaging the spectral power of
several returns and iii) for estimating the line-of-sight wind from the Doppler shift of
the averaged spectra. The simulations take into account the satellite position and
motion along the orbit track, the observational and instrumental characteristics, a 3-D
representation of the relevant atmospheric parameters (i.e. wind field, cloud coverage and
aerosols distribution) and the Earth surface characteristics. The simulator and the
method for estimating the line-of-sight wind will be presented. We will show the
results obtained for a payload composed of two 2-μm coherent LIDARs looking in
orthogonal directions, and for a satellite moving on a low orbit. The precision,
accuracy and the vertical and horizontal resolution of the wind estimates will be
discussed.
References:
[1] S. Ishii, T. Iwasaki, M. Sato, R. Oki, K. Okamoto, T. Ishibashi, P. Baron, and T.
Nishizawa, Future Doppler lidar wind measurement from space in Japan, Proc. of SPIE Vol.
8529, 2012
[2] S. Ishii, H. Iwai, K. Mizutani, P. Baron, T. Itabe, H. Fukuoka, T. Ishikawa, A. Sato and
A. Asai, 2-μm coherent LIDAR for CO2 and wind measurements, Proc. of SPIE Vol. 8872,
2013 |
|
|
|
|
|
|