|
Aug 1920 |
Aerological Observatory founded.
|
|
Nov 1920 |
Surface observation started. |
|
Apr 1921 |
Upper wind observation started. Small balloon filled with
hydrogen gas launched and tracked using optical
theodolites. |
|
Dec 1922 |
Lower atmosphere observation started using kite and tethered balloon (use
of kite discontinued in February 1946). |
|
Aug 1925 |
Sounding balloon observation started. Large balloon equipped with aerometeograph
launched. Balloon recovered after falling: records of atmospheric pressure,
temperature, and humidity retrieved. |
|
Sep 1944 |
Radiosonde observation started. |
|
Jul 1955 |
Atmospheric ozone observation started with Dobson ozone
spectrophotometer. |
|
Jul 1957 |
Observation of solar and terrestrial radiation started.
|
|
Sep 1957 |
Present four-division system introduced. |
|
Mar 1975 |
Observatory moved to current premises.
|
|
Mar 1986 |
Automatic data processing system introduced for
aerological observation. |
|
Jan 1990 |
Observation of solar spectral ultraviolet radiation started
with Brewer spectrophotometer. |
|
Feb 1993 |
WMO International Radiosonde Comparison held at the
observatory. |
|
Jan 1994 |
Automatic Dobson ozone spectrophotometer developed.
|
|
Feb 1996 |
International Ozone Comparison in Asia and Pacific Region
(1st stage) held at the observatory. |
|
Aug 1996 |
International Ozone Comparison in Asia and Pacific Region
(2nd stage) held at the observatory. |
|
Jun 1997 |
BSRN (Baseline Surface Radiation Network) report to
World Radiation Centre started. |
|
Jan 1998 |
95 Surface Weather Observation System modified. |
|
Jun 1998 |
Joined WMO (World Meteorological Organization)
International Ozone Comparison. |
|
Jul 1999 |
Higher rawinsonde observation started as part of
Global Climate Observation System Upper Air
Observation Network. |
|
Sep 1999 |
Joined Long Wavelength Radiometer International
Comparison (1st stage). |
|
Mar 2001 |
Joined Long Wavelength Radiometer International
Comparison (2nd stage). |
|
Dec 2001 |
Local weather observation station name changed from Nagamine
to Tsukuba. |
|
May 2002 |
Joined WMO (World Meteorological Organization) International Ozone Comparison. |
|
Mar 2003 |
International Dobson Spectrophotometer Comparison held at the observatory
|
History