This group observes the Sun in the white light and in the
H-alpha line; the results are used in the scientific research
of the Solar Department, and they contribute to the world
net ISES (as station No. 31516) and to SIDC in Brussels.
Besides solar observations, the group tries to collect
all the accessible data on the actual state of solar activity.
The group compiles and publishes a weekly solar-activity
forecast. The solar-activity forecast has been published in
Ondrejov since 1978, and the group took over the forecasting
in 1990.
For monitoring observations of the whole solar disk in H-alpha,
a small refractor is used (50/320 mm + H-alpha filter Coronado
0,6 A ). For detailed observations of the solar photosphere
and chromosphere, two refractors are used (205/2830 [A.Clark-
-1858] and 210/3410 + H-alpha filter DayStar 0,7 A), with
CCD cameras, a computer image-analyzer, digitization of the
image and its videorecording. A small refractor (63/840) are
used to monitor the whole solar photospheric disk.
E-mail address: sunwatch@asu.cas.cz
