1940-41...........German...............British..........USNChristian VII. wrote:Just out of interest:
How good was German FC radar in terms of range & bearing accuracy in comparison to British & US FC radar in the following periods?:
1940-41
1942-43
1944-45
Range accuracy:..40 meters...........240 yards.........N/A
Bearing Accuracy..0.10*................0.75*..............N/A
1942-43..........German................British..........USN
Range Accuracy:..40 meters............120 yards......0.1% of range + 40 yards
Bearing axxuracy..0.10*.................5-6 arc M (0.08*)...........3-4 mils (0.12-0.20*)
1944-45.........German ................British....................USN
Range accuracy:.25 meters.............120 or 40 yards..........0.1% of range + 15 yards.
Bearing Accuracy: 0.10*.................0.8*-0.10*................2-3 mils
NOTES:
The bearing accuracy is that of the radar itself but the directional accuracy of the mounting system of the antenna may be a little or a lot sloppier. Often times the director would need to be rocked back and forth to get a more accurate reading or an average reading.
The range accuracy of the British radars using the precision ranging panal was 25 yards. Howse lists 120 yards for Type 284M in practice, and British documents list 40 yards for Type 274 which began to be phased in on some major warships from May 1944. The differences of listed accuracy to that of the PRP is probably due to variance in the exact point in time the pulse fired. Type 274 used spark gap modulation (to produce 500kw) so the exact firing point in time was scattered. Type 284M used a thyratron pulser with a slight scatter in the timing of the firing of pulses.
Late war Seetakt with high powered transmitters (125kw or 400kw) could not use or not use the fine ranging system as well. This was because phase coherence could not be obtained or obtained consistently. The range accuracy was 100 meters on these late war high powered sets which used either a thyratron pulser or a spark gap modulator. The fine ranging system on the regular models could obtain 25 meters accuracy by 1944.
According to German document Taktischer Befehl Number 10, Euklid became operational on some German warships in March 1945. Euklid was now the primary FC radar system with Seetakt a back up system for FC on destroyers. Euklid had the same performance as Wuerzburg/Mannheim. The range accuracy would be 10-25 meters, and the bearing/elevation accuracy was within 0.10* 80% of the time and within 0.20* 60% of the time in that case. Wuerzburg/Mannheim/Euklid were conical scanning radars like SCR584, suitable for both surface FC and Flak FC. Euklid could be operated at 27cm or at 3cm.