This manual provides general operating and maintenance instructions for the BS-3 ballistic station, which is small-lot produced by the LRERI in small lots.
The BS-3 is intended for measurement ballistic object movement parameters (at least weapon projectile initial velocity and one of the parameters characterizing the velocity change).
Functional principle of the BS-3 operation is phase tracking of frequency shift signal, which is reflected from the moving target.
BS-3 is intended for operation in field conditions under any atmospheric conditions, in the day and night time.
BS-3 may be placed on the firing-artillery weapon or tripod mounted.
a) The basic BS-3 equipment consists of an antenna/bracket assembly, a portable control and display unit, a 100-meter antenna cable, a power cable, and a transport case to house and transport the equipment. Options include a cable drum, a tripod, Ac- to-Dc converters, and a ballistic software package.
b) Antenna/Bracket Assembly. This assembly consists of the antenna attached to the bracket assembly. The antenna assembly contains the mirror circular polarization antenna, isolation section for the sounding and reflected signal, transceiver, power supply, radio frequency self-test circuitry, and a circuit for initial analogous signal processing, BS-3 measurement operation start unit (by the muzzle flash and electric trigger signal or (and) shock wave) When it is necessary, the start may take place by the signal of accelerator placed on the weapon and connected to it with the special cable.
The bracket assembly provides a standard mechanical connection to different mounting brackets fixed on a weapons. Alignment holes and a guide bolt with the turn handle are provided on the bracket assembly to secure it on the gun mounting bracket.
Equipment for the determination of antennas assembly and gun barrel mutual location determination includes measuring reel, foresight and bench mark signs.
c) Control and indication unit. The processing and indication unit includes indicator, circuit for information secondary processing and ballistic calculations and interfaces hardware. This unit is connected to the antenna assembly by an antenna cable and performs all controls operations. A keyboard allows operating mode selection and the display provides readout of measurement and self-test results.
d) Cables and Optional Cable Drum. A 5-meter power cable and a 100-meter antenna cable are supplied with the BS-3. An optional cable drum is used for accelerometer.
e) Transport Case. The transport case is foam lined. It has recesses for storing of the antenna/bracket assembly, control and indication unit, the power cable assembly, and the antenna cable assembly with or without the drum.
f) Optional tripod. An optional tripod is available for mounting the antenna/bracket assembly remotely from a gun when desired.
g) Optional Ac/Dc Converter. Optional Ac/Dc converter for converting 110 or 220 Vac to 24 Vdc system primary power are available
h) Optional Ballistic Analysis Software. An, optional software package m IBM format is designed to provide the velocity/tune and velocity/distance plots on the base of measurement using an IBM compatible computer.
Basic specifications for the BS-3 equipment are provided in table 1.
Table 1. Basic specifications
Function Characteristics System
Projectile Types Measured
All types including base-bleed, sabot, mortar, tracers,
Weapon Caliber 5.56 to 406 mm Velocity Measurement Range 30 to 3,000 meters per second Overall Measurement Accuracy ±0.05 % Data Provided on the display Muzzle velocity; average muzzle velocity;
Standard Firing Table velocity;
calibrated velocity for nonstandard conditions;
parameters characterizing muzzle velocity variation;
measurement point data;
ballistic analysis data:
time of projectile movement in the barrel
Input Power Requirements Voltage 22 to 32 Vdc with a standard 100-meter antennas cable Power Consumption 60 W in a measuring operation and 15 W in waiting
ANTENNA ASSEMBLY Input Power Requirements Voltage 22 to 32 Vdc Power Consumption 45 W Antenna Characteristics Circular polarization Antenna Gain Greater than 37 dB Beamwidth 2.5° x 2.5° Sidelobe Level Less than 12 dB Squint Angle 0,5° Receiver Bandwidth 10 KHz to 1,3 MHz (equal to projectile velocities of 30
to 3,000 m/s)
Transmitter Frequency (Selectable) L-M range Power Output 0.2 W DSP Processor Processing Technique frequency shift signal phase tracking Memory 1,000 shot:. (Nonvolatile) Data Output Format RS232 (Standard)
RS 485 (Optional)
RS232/RS422/RS485Description Data Bits 8 Stop Bits 1 Parity None Baud Rate 200 000 Antenna Connector Data I/O Connector 2 I/O Mating Connector 2 Processing and Indication Unit Power Requirements 15 W Voltage 22 to 32 Vdc (with 100-meter cable) Power Consumption 10 W Display Type LED - 256 digit Display Format Velocity displayed to 7 digits Display Resolution 0.03 m/s Displayed Data Muzzle velocity; average muzzle velocity; Standard Firing Table velocity; calibrated velocity for nonstandard conditions; parameters, which characterize muzzle velocity variation; measurement point data;ballistic analysis data System Environmental Characteristics Operating Environment Temperature Unsheltered per MIL-STD 810D Operating -40° to 60° C (-72° F to 108° F) Non-operating -45° to 65° C (-81°F to 117 ° F) Altitude Operating 10,000 feet Non-operating 50,000 feet Humidity 100 percent (relative) Radiation Hazard Less than 1 mW per square centimeter PHYSICAL CHARACTERISTICS Antenna Dimensions (H x W x D) 300 x 230 x 250 mm Weight 10.3 kg Antenna Bracket Dimensions (H x W x D) 300 x 230 x 170 mm Weight 4 kg Display Unit Dimensions (H x W x D) 290 x 224 x 130 mm Weight 5,2 kg Cables Power Cable Length 5 m Antenna Cable Length 100 m standard Weight (Power and Antenna Cable) 13 kg Transport Case Dimensions (H x W x D) 370 x 490 x 270 mm Weight 16.5 kg