The first astronomical observation with the fully assembled 30 m telescope was made on 15 May 1984. From this day onwards, the telescope was used without any major shut-down and today with of the time used for observations.
In order to provide the telescope for commissioning, a number of important preparations were terminated on 15 May 1984:
In order to find any source, the first observation (fig. 1) was a scan across the Sun (it was cloudy), immediately followed by pointing on bright quasars. In this first observation, using the full system and with no elaborate corrections applied, we ``missed'' the point source by --- with this the telescope was considered to be ready; quickly after this the first spectra were taken (Fig. 2).
It took approximately one more year of optimization and improvements to open the telescope for guest observers (May 1985).
Many persons of the Home Institutes and of the Construction Firms participated in the final preparations.
Figure: A fac simile of the original Sun recording on May 15, 1984.
Figure: One of the first spectra taken (SiO maser in R Cas), captured on the screen of the TV monitor.