Solar Observing Campaigns

Project Team: Urpo

Solar observations continued at Metsähovi in 2000. Receivers working at 37 GHz and 87 GHz were used. Number of observing days was 43. More than 100 solar radiation maps were measured and active regions were tracked for about 100 hours in order to detect energy burst and releases at radio waves. Only few events were detected. Analysis of measured data continued in international cooperation.

Figure 20: Solar map measured at Metsähovi on August 18, 2000. Frequency was 87 GHz (wavelength 3 mm). North is on top. Several active regions can be seen (red coloured areas) and a prominent coronal hole extends from the solar limb to the equator (green coloured structure).