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Wassermann Radar

Description of the radar set, tactical-technical characteristics

Figure 1: „Wassermann M” Silhouette

„Wassermann M” Silhouette
(click to enlarge: 640·480px = 32 kByte)

Figure 1: „Wassermann M” Silhouette

frequency: 125 … 158 MHz,
158 … 250 MHz
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receiving time:
dead time:
peak power:
average power:
instrumented range: 300 km
range resolution:
accuracy: ±300 m
hits per scan:
antenna rotation:

Wassermann Radar

The “Wassermann” (Engl.: “Aquarius”) radar (FunkMGerät 402, FuMG402) was a rotating search radar developed by Siemens since 1940. The “Wassermann” radar was derived from the Freya “elevator” test radar, in which the antenna on a steel mast could be raised and lowered to measure height. Since this was a time-consuming process, several antenna arrays were later mounted one above the other, which could now be quickly switched alternately to the transmitter/receiver.

The antenna consisted of a stationary rotatable lattice mast (later round mast) of 37 to 60 meters height. To this mast were attached retaining frames of 4 to 12.4 meters width, to which initially only 4 Freya antennas were attached. By variations of the antennas the aperture angle of the antenna and the range of the radar were substantially affected. The antenna mirror consisted of four fields with up to 144 dipoles. In detail the antennas were composed of

For long range target acquisition the two upper mirror quarters are switched on, for low level target acquisition the two lower ones. The uppermost dipole line belonged to the “Gemse” identification device (interrogator).

About 7 soldiers were needed to operate the radar.

Picture gallery of Wassermann

Figure 2: Control panel and display units of the “Wassermann” radar