1. Name of Database: Ozone in Stratosphere 2. Institution: Graduate School of Science, Tohoku University 3. Contents of Database: The data files provide the ozone volume mixing ratio (in ppmv) profiles observed at Sendai (38.25N, 140.83E), Japan with a Tunable Diode Laser Heterodyne Spectrometer (TDLHS). Observations were carried out from 1989 to 1990 and from 1998 to 1999. All the profiles are the average ones of data obtained in a day. 4. Examples of Database: 1990 Day number= 4 Volume Mixing Ratio (ppmv) Altitude (km) 0.0407000 5 0.0396100 6 0.0388900 7 0.0837600 8 0.2912700 9 0.7148500 10 -0.37470E-01 0.37470E-01 1.1164200 11 1.2907500 12 1.2498100 13 1.0939300 14 0.9519700 15 -0.11990E-01 0.11990E-01 0.9219800 16 1.0494100 17 1.3241200 18 1.7304000 19 2.2970700 20 -0.56330E-01 0.56330E-01 3.0778301 21 4.0766101 22 5.1850100 23 6.2165599 24 7.0128798 25 -0.10119E+00 0.10119E+00 7.4916902 26 7.6240802 27 7.4447999 28 7.0714898 29 6.6357098 30 -0.43380E-01 0.43380E-01 5. Contact: Graduate School of Science, Tohoku University Aramaki Aza-Aoba, Aoba, Sendai, Miyagi, 980-8578, Japan Hiroshi Fukunishi TEL:022-217-6734, FAX:022-217-5775 E-mail: fuku[AT]pat.geophys.tohoku.ac.jp 6. Public Offering of Database: You can find the database in the following page. http://pat.geophys.tohoku.ac.jp/~murata/TDLHS/tdlhs.htm Other data observed in Hawaii and Alaska will be added.