TM 75053
AN/TPS41( )
1. NOMENCLATURE: Radar Set AN/TPS41( ).
Reflecter _ _ _ _ _ _ _ _ _ _ _ 5-foot fiber glass,
parabola truncated.
2. TYPE CLASSIFICATION: Development.
H o r i z o n t a l beam width 1.6 max.
V e r t i c a l b e a m w i d t h 1.7 max.
3. SECURITY REQUIREMENTS: Unclassified.
Attenuation of side lobes_ _ _ 22 db.
4. PRIMARY USE OR CONCEPT OF EMPLOYMENT:
Rotation speeds _ _ _ _ _ _ 5 rpm cw, ccw.
Used as a search device for locating precipitating areas
Duplexer _ _ _ _ _ _ _ _ _ _ _ 4-port ferrite circula-
in early weather forecasts and nuclear detonation activity.
tor.
5. BRIEF FUNCTIONAL DESCRIPTION: The set is a
Receiving:
Type _ _ _ _ __ _ _ _ _ _ _ _ Microwave.
mobile weather radar set providing real time and three
dimensional data on precipitation areas and nuclear de-
Operating frequency _ _ _ _ _ 8.5 Hz to 9.6 Hz.
tonation activity. The radar set can operate in a modified
Local oscillator
S280(B)/G shelter on a 2-ton truck, or on the ground.
tube type _ _ _ _ _ _ _ _ Klystron.
Transportation to the operating site can be made by
L o c a l o s c i l l a t o r _ _ _ 8.5 Hz to 9.6 Hz.
truck, helicopter, or as loose cargo.
Mixers _ _ _ _ _ _ _ _ _ 60 MHz, AFC Bal-
The radar set detects and displays radar ethos on the
anced Mixer, image
plan position indicator (PPI), range height indicator
reject ion balanced
(PHI) and A/R Scope indicator. Iso-echo contouring of
signal mixer.
the target area is also available for analysis.
Intermediate:
Three remote indicator units are provided and can be
Frequency _ _ _ _ _ _ 60 MHz.
operated up to one mile from the control console. Display
Bandwidth _ _ _ _ _ 750 kHz or 1.4 MHz.
on these units can duplicate the maint RHI/PPI display
S e n s i t i v i t y _ _ _ _ 104 dbm wideband
and can be individually adjusted for displays independent
pulse, 1s pw, 107
from the RHI/PPI display.
dbm narrow band
pulse, 5 s pw,
6. TECHNICAL CHARACTERISTICS:
Gain _ _ _ _ _ _ _ _ _ _ _ 128 db.
General:
Synchronizing:
Power input _ _ _ _ _ _ _ _ _ 115 vac, 30, 4 wire,
Oscillator _ _ _ _ _ _ _ 5.999552 MHz Crystal.
400 Hz, 10 kw.
Ranger Markers _ _ _ _ _ 6.66 s (1KM), 66s
Maximum range _ _ _ _ _ _ 240 km.
(10 KM), 26.6 s
M i n i m u m range _ _ _ 250 meters.
(40 KM).
Range accuracy _ _ _ _ _ 100 meters.
S y s t e m t r i g g e r s _ _ _ 187.5, 375, 750 Hz.
Range determination _ _ _ By use of range marks
Indicating:
and movable strobe.
P r e s e n t a t i o n _ _ _ _ _ RHI/PPI, A/R scope
Azimuth coverage _ _ _ 360 continuous clock
displays.
wise and counter-
Cathode-ray tube _ _ _ _ _ _ 7AQP7, SC2751.
clockwise, sector
Sweep ranges _ _ _ _ _ _ _ _ _ 10, 40, 80, 160, 240 km.
scan 10 to 50 and
Range
M a r k e r s 1, 10, 40 km.
manual positioning.
Elevation scale
5 to 90.
Azimuth accuracy _ _ _ 0.6.
Azimuth scale _ _ _ _ _ _ _ _ 0 to 360.
Azimuth determination _ _ By synchronizing PPI
Sweep with antenna
rotation and Nixie
Azimuth
readout.
Positioning:
Elevation accuracy _ _ _ _ _ 0.5.
Drive system _ _ _ _ _ _ _ _ dc motor.
Elevation Angle _ _ _ _ Nixie readout.
Types of operation _ _ _ _ Manual, sector scan,
Height determination _ _ _ By reading scribe
continuous (cw &
marks on RHY/PPI
ccw).
scope.
Continuous rotation speed _ _ 5 rpm.
Shelter _ _ _ _ _ _ _ __ _ Modified S280(B)/G.
Elevation:
Assembly time _ _ _ _ _ _ 30 minutes3 men.
Drive system _ _ _ _ _ dc motor.
Transmitting:
Type of operation _ _ _ _ Manual, sector scan.
Frequency _ _ _ _ _ _ _ _ _ 8.59.6 Hz.
Power Unit:
Peak power _ _ _ _ _ _ _ _ _ _ 250 w at antenna.
Type _ _ _ _ _ _ _ _ _ _ _ _ _ _ PU 656/G (2 genera-
Average power _ _ _ _ _ 250, 200, 100.
tors).
Pulse repetition
Output _ _ _ _ _ _ _ _ _ _ _ _ _ 10 Kw.
rate _ _ _ _ _ _ _ _ _ _ _ _ _ _ 490 Hz, 380 Hz, 760 Hz.
Fuel Consumption _ _ _ _ 2 gal /hr. per genera-
Pulse width _ _ _ _ _ _ _ _ 1.0 sec, 5.0 sec.
tor.
Duty cycle _ _ _ _ _ _ _ _ _ _ _ .001, .0008, .0004.
Source of rf power _ _ _ _ _ Magnetron.
7. MAJOR COMPONENTS:
RF:
Transmission Line _ _ _ _ RG 51/U Aluminum
Console, Radar Set OJ146 ( ).
Waveguide.
Modulator, Radar MD813( ).
Radiating element _ _ _
Horn, Buttonhook.
Receiver-Transmitter, Radar RT958( ).
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