Rescue of Old Analogue Magnetograms
by Converting to
Digital Images
Observatory |
Geographic coordinates |
IRT (Irkutsk, 1949-1954) |
52.17° N 104.45° E |
KZN (Kazan, 1951-1957) |
55.83° N 48.85° E |
MOS (Moscow, 1944-1957) |
55.48° N 37.31° E |
ODE (Odessa, 1946-1956) |
46.78° N 30.88° E |
SRE (Srednikan, 1936-1957) |
62.44° N 152.31° E |
SVD (Sverdlovsk, 1949–1957) |
56.73° N 61.07° E |
TKT (Tashkent, 1943,1944,1950,1952-1957) |
41.33° N 69.62° E |
VLA (Vladivostok, 1934-1948) |
43.68° N 132.17° E |
YSS (Yuzhno Sakhalinsk, 1932-1946,1953) |
46.95° N 142.72° E |
Standard
(20 mm/hr) magnetograms from the stations listed above were converted to
digital images in the
To covert
Geographic Coordinates of these
stations to Corrected Geomagnetic
Coordinates for a given year use
the GEO-CGM calculator.
In 2002, the Division V
“Geomagnetic Observatories, Surveys and
Analyses” of the International Association for
Geomagnetism and Aeronomy (IAGA)
embarked on a new initiative to create an “Old
Analogue Magnetograms Inventory”, where it was proposed to the worldwide
geomagnetic community to begin converting old analogue magnetograms to the
digital, computer-readable images.
In 2003, the International Council for
Science (ICSU) awarded a proposal put
forward by IAGA to initiate a "Rescue
of old analogue magnetograms by converting to digital images". This
project has successfully been completed and reported back to ICSU:
The IUGG Electronic Journal
Volume 4 No. 4 (April 1, 2004)
2003 ICSU Grant Report
The IUGG
International Association for Geomagnetism and Aeronomy
(IAGA) received an award of $35,000 from the International Council of Science
(ICSU) in 2003 for their proposal “Rescue of old analogue magnetograms by
converting to digital images”. The project's outcome is that 177 station-years
of 64,650 of old and historic magnetograms from 9 Russian, two Indian, and one
German magnetic observatory are now converted to digital images, available at http://apollo.wdcb.ru/historic/ and http://swdcft49.kugi.kyoto-u.ac.jp/film/.
The stations chosen were selected from a pre-IGY Catalog of Analogue
Geomagnetic Data complied from the time period 1841-1960, and the most rare
magnetograms (those existing in one copy only) were digitized first. The
magnetogram conversion technique was developed by a team at
Web page curator: Dr. E. Kharin