Annaturm
The Annaturm is a 28 m (without antennas) high observation and directional radio tower on about 405 m above sea level. NHN high Bröhn , the highest point of the Deister ridge in the Calenberger Bergland in Lower Saxony . The Annaturm forest restaurant is attached to the tower with its transmitter .
history
The first tower on the Bröhn summit was a wood and iron construction built from 1833 to 1834, which was built at the instigation of Carl Friedrich Gauß and was given a trigonometric point for national surveying ; it was later renewed several times. The name comes from the wife of the master mason who built the third Annaturm in the 1880s. In 1834, Gauss had his son Joseph Gauß carry out land surveys for the Gauß land survey . He himself had already carried out measurements on the 310 meter high Kalenberg near Bredenbeck at the Deister I survey point in 1822, where the Gaußstein was placed on the Deister .
In 1867 and 1879 the second and third towers were built or rebuilt from different materials to replace them.
The fourth tower was built in 1888 - this time made of steel. The fifth tower, built in 1904, was a steel lattice structure that was used as a directional radio station , a flight observation point during the Second World War (1939-1945) and, in the 1950s, the location of an air traffic control center of the Federal Air Traffic Control Agency .
Today's sixth Annaturm was built in 1982 as a viewing tower in concrete tube construction with an attached forest restaurant Annaturm .
Opportunities for viewing
Inside the Annaturm, which is open daily (except Monday) from 10 a.m. to 5 p.m., the ascent is via a spiral staircase. From its viewing platform at a height of 433 m above sea level. NHN has a panoramic view of the Deister and the Calenberger Land as far as Hildesheim and Hanover , the Steinhuder Meer and the Weser Uplands with the Köterberg . When the view is clear, the Lüneburg Heath and the Brocken in the Harz Mountains are visible in the distance .
Transmitters
The amateur radio relay DB0SUN with the frequency 438.8875 MHz is located on the annaturm.
In the 1950s there was an air traffic control center of the Federal Agency for Air Traffic Control at the Annaturm . About 1.3 km northwest of the Bröhn there is a DFS tower with an SRE-M radar system on the Höfeler (approx. 395 m ) . Each of these six systems nationwide has a detection radius of around 145 NM ( nautical miles ), which corresponds to almost 270 km. Further air traffic control systems are installed on the Deisterkamm nearby.
Panoramas
View from the Annaturm to the north-northwest to the spoil dump of the potash mining in Bokeloh , behind it the Steinhuder Meer on the left horizon
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View from the viewing platform northeast to Wennigsen
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Individual evidence
literature
- Wolfgang Kratzin: A jewel for hikers and cyclists. The predecessor of the Annaturm was built 180 years ago - by the mathematician Carl Friedrich Gauß . In: Springer Yearbook 2014 for the city and the old district of Springe. Ed .: Friends of the town history of Springe e. V., Springe 2014, pages 109-111.
Web links
Coordinates: 52 ° 14 ′ 47.9 " N , 9 ° 30 ′ 31.6" E