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Oberpfaffenhofen

CRISTA

Introduction

The CRISTA experiment was designed and developed at the University of Wuppertal to study small scale structures like eddies, waves and turbulence in earth's middle and upper atmosphere. Four limb scanning liquid helium cooled spectrometers and three telescopes were simultanously operated to acquire global maps of temperature and atmospheric trace gases with very high horizontal (ca. 500 km x 650 km) and vertical (ca. 2-3 km) resolution in the 15-150 km altitude region. About 14 trace constituents and temperature were measured simultanously.

CRISTA was successfully launched in November 3, 1994 with the Space Shuttle STS-66 Atlantis. On board the free flying platform ASTRO-SPAS (Daimler-Benz Aerospace) CRISTA performed its measurements travelling 50-100 km behind the shuttle between November 4 and 12, 1994. The platform was then retrieved and safely returned to Earth by the shuttle.

An extensive ground-truth program (CRISTA-campaign) including rockets, balloons and ground-based measurements from 42 sites on the globe was set up to validate and complement the in-orbit measurements.

The CRISTA mission was co-manifested with NASA's ATLAS-3 program.

The CRISTA-SPAS mission flew again in August 1997.

Gas Wavelength [┬Ám] Wavenumber [cm-1] Altitude range [km]
CO 4.6 2174 20 - 80
NO 5.3 1887 100 - 180
NO2 6.2 1613 20 - 40
H2O 6.3 1587 10 - 70
CH4 7.7 1299 15 - 70
N2O 7.8 1282 15 - 40
N2O5 8.0 1246 20 - 40
O3 9.6 1042 10 - 90
F12 10.8 926 10 - 30
HNO3 11.3 885 10 - 45
F11 11.8 847 10 - 25
CO2,T 12.6 792 10 - 65
Gases measured only by the center telescope:
CO2,T 15,0 669 20 - 100
N2O 17,0 588 30 - 45
H2O 58,0 170 30 - 70
HF 61,0 164 30 - 70
O(3P) 63,0 158 110 - 180
HCL 69,0 145 30 - 50

Table 1: Trace gases measured by CRISTA in 1994

Data Access

Please use the Navigation Bar above to get to the ftp sites from which data from both CRISTA1 and CRISTA2 can be downloaded.

Documentation

There are numerous documents available from the point of contact given below describing the instrument and the data. Some material including recent publications are available on-line from the CRISTA homepage at the University of Wuppertal.

Of special interest for CRISTA1, please see the following:

Offermann, D., K.U. Grossmann, P. Barthol, P. Knieling, M. Riese and R. Trant, "Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) experiment and middle atmosphere variability", J. Geophys. Rs., 104, 16311-16325, 1999.

Riese, M., R. Spang, P. Preusse, M. Ern, M. Jarisch, D. Offermann and K.U. Grossmann, "Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) data processing and atmospheric temperature and trace gas retrieval", J. Geophys. Rs., 104, 16349-16367, 1999.

Of special interest for CRISTA2, please see the following:

Grossmann, K.U., D. Offermann, O. Gusev, J. Oberheide, M. Riese, and R. Spang, "The CRISTA-2 mission", J. Geophys. Res., 107 (D23), 8173, doi:10.1029/2001JD000667, 2002.

Eidmann, G., D. Offermann, B. Schaeler, M. Jarisch and F.J. Schmidlin, "Stratospheric variability of temperture and ozone as inferred from the second CRISTA mission: Zonal means and local structures", J. Geophys. Res., 107 (D23), 8180, doi:10.1029/2001JD000721, 2002.

Kuell, V., F. Olschewski, M. Jarisch, D. Offermann and K.U. Grossmann, "Trace gas variability in the stratosphere", in print, Adv. Space Res., 2003.

Further Links

Contact

The Principal Investigator of the CRISTA program is:

Prof. Dr. Dirk Offermann
University of Wuppertal
Physics Department
Gauss-Str. 20
D-42097 Wuppertal
Tel.: +49 202 439-2604
Fax: +49 202 439-2680
E-Mail: offerm@uni-wuppertal.de

The WDC-RSAT point of contact for CRISTA: wdc@dlr.de.