LIDAR RESEARCHER: Dr. Gerd Baumgarten, Dr. Jens Fiedler, Prof. Dr. Götz von Cossart, Prof. Dr. Franz-Josef Lübken

RESEARCH ASSOCIATES: Armin Schöch, Prof. Dr. Ulf von Zahn,

Dr. K. H. Fricke (Bonn University, Germany), Dr. A. Hauchecorne (CNRS-SA, France)

MAILING ADDRESS:

Leibniz-Institute of Atmospheric Physics, Schloss-Strasse 6, 18225 Kuehlungsborn, Germany

TELEPHONE NUMBER: +49 38293 680

FAX NUMBER: +49 38293 6850

E-MAIL ADDRESS: baumgarten@iap-kborn.de

WEB SITE: http://www.iap-kborn.de/optik/optik_e.htm

DATE: May 24, 2004

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.):

ALOMAR, Andøya, Norway, 69 N, 16 E

SITE ELEVATION: 379 m

PARAMETER(S) OR CONSTITUENT(S) MEASURED:

relative density, temperature, gravity waves, stratospheric aerosols and clouds,

noctilucent clouds

RESEARCH OBJECTIVES AND SPONSOR:

Polar middle atmosphere: thermal structure, gravity waves, stratospheric and noctilucent clouds.

MEASUREMENT TECHNIQUE:

Rayleigh / Mie / Raman backscattering

MEASUREMENT RANGE: 10-100 km

VERTICAL RESOLUTION: 150 m (Zenith pointing)

FREQ. OF MEASUREMENT (TYPICALLY): 30%, day and night

MEASUREMENT TIMES (TYPICALLY): Typ. 4h, >48h: 2/year, Max 136 hr

LASER TYPE AND WAVELENGTH (s):

Seed Laser: cw-Nd:YAG 1064/532 nm stabilized to I2 absorption line @ 532 nm

2 x Seeded Nd:YAG (Spectra Physics Pro-290): 1064 nm, 532 nm, 355 nm

LASER ENERGY/PULSE: 1064 nm : 500 mJ

532 nm : 500 mJ

355 nm : 200 mJ

PULSE REPETITION RATE: 30 Hz each

RECEIVER SIZE AND CONFIGURATION:

2 x 180 cm Cassegrain, up to 30 deg off Zenith, NW and SE quadrant.

Field of View: 0.18 mrad = 18 m / 100 km

Automatic beam alignment by defocused light from troposphere: Accuracy 1 m / 100km / 1 sec.

DETECTORS USED: PMT, APD

SIGNAL PROCESSING: all digital

ANALOG-T0-DIGITAL CONVERTER: -

COMPUTER: 13 x PC

PLATFORM (if applicable): Windows NT, Windows 2000, Linux

PUBLICATIONS:

von Zahn, U., G. von Cossart, J. Fiedler, K. H. Fricke, G. Nelke, G. Baumgarten, D. Rees, A. Hauchecorne, and K. Adolfsen, The ALOMAR Rayleigh/Mie/Raman lidar: objectives, configuration, and performance, Ann. Geophys. , 18 , 815-833, 2000.

Baumgarten, G., K. H. Fricke, and G. von Cossart, Investigation of the shape of noctilucent cloud particles by polarization lidar technique, Geophys. Res. Lett. , doi:10.1029/2001GL013877, 2002.

Baumgarten, G., F.-J. Lübken, and K. H. Fricke, First observation of one noctilucent cloud by a twin lidar in two different directions, Ann. Geophys., 20 , 1863-1868, 2002.

Fiedler, J., G. Baumgarten, and G. von Cossart, Noctilucent clouds above ALOMAR between 1997 and 2001: Occurence and properties, J. Geophys. Res., 108(D8) , 8453, doi:10.1029/2002JD002419, 2003.

U. Blum, K.H. Fricke, G. Baumgarten, A. Schöch, Simultaneous lidar observations of temperatures and waves in the polar middle atmosphere on both sides of the Scandinavian mountains: A case study on January 19/20, Atmos. Chem. Phys. Discuss. , 4 , 969-989, 2004

COMMENTS:

Located at the ALOMAR facility.

ALOMAR: Arctic lidar observatory for middle Atmosphere research, http://alomar.rocketrange.no

Routine operation since 1994