Aquarius (Radar)
The radar device ( radio measuring device (FuMG)) with the code name “Wassermann” ( FuMG.402 ) was a further development of the FuMG.80 “Freya” and was used in the Second World War for the so-called “remote search”. The devices for stationary use were developed by GEMA from 1942 under the direction of Theodor Schultes . The aim of the work was to improve the antenna system without major changes to the circuitry on the transmitter and receiver of the Freya device to increase its range and direction finding accuracy.
development
A total of seven different versions were developed. The two most important variants are explained below:
- The radio measuring device FuMG.41 "Wassermann L" ("light") was the interconnection of four Freya antenna fields on top of each other on a 40 meter high rotating steel lattice mast.
- Another version was the FuMG.42 "Wassermann S" ("heavy"). For this purpose, eight Freya antenna fields were mounted on a 60 meter high tubular mast, four on top of each other and two next to each other.
The interconnection of the antenna fields resulted in a bundling of the radiation diagram . It was thus possible to achieve a higher effective radiated power (ERP) with the same transmission power , and thus a higher range. However, this was bought at the cost of higher material input. The interconnection of antennas on top of each other on "Wassermann L" resulted in a flatter vertical radiation diagram and a greater range with a constant opening angle, so the bearing accuracy remained the same. By placing them next to each other on the "Wassermann S", the bearing accuracy could also be improved.
Technical specifications
| Parameter | Data |
|---|---|
| Search area | Mechanical swivel through 360 ° |
| Range | Depending on flight altitude and installation altitude, e.g. B.
|
| Distance measurement accuracy | ± 300 m |
| Bearing accuracy |
|
| Ability to capture high targets | Probably up to 12,000 m |
| Weight | 30-60 t |
| Mast height | 37-57 m |
| Mast width | 6-12.40 m |
| Interference immunity through three different, continuous frequency ranges |
|
| Identifier | Against firstling |
See also
- Radio measuring devices - overview of German radar devices in World War II
- Military history of Wangerooges
- Four-poster bed method
literature
- Fritz Trenkle : The German radio control procedures until 1945 . Hüthig , 1988, ISBN 3-7785-1647-7 (236 pages).
- Werner Müller : Ground measuring devices of the German Air Force until 1945. in: Waffen-Arsenal , Vol. 132, Podzun-Pallas Verlag GmbH, Friedberg (Hessen), 1992, 48 pp.
Web links
Individual evidence
- ↑ Overview of the remote search devices in the German Atlantic Wall Archive
- ↑ Gebhard Aders : History of the German Night Hunting 1917 - 1945. 1st edition, 1977, p. 357