Kestrel 4500 Horus (Ballistics) - Manual (Page 12)

23
BALLISTIC & ENVIRONMENTAL
QUICK REFERENCE
Target Screen
Active – tells whether this target is currently active
TR – target range
DoF – direction of fire (relative to true north)
Ideg – inclination angle (negative means the target is
below the shooter)
Icos – inclination cosine (cosine of the inclination angle)
TS – target speed
TD – target direction of movement
WD – current wind direction (direction from which wind
is blowing, relative to DoF)
WS1 – typical current wind speed
WS2 – maximum current wind speed
Gun Screen
MV – muzzle velocity
BC – bullet ballistic coefficient
BW – bullet weight
BD – bullet diameter
ZR – zero range
BH – bore height
RT – rifling twist rate (distance in which bullet achieves
360 degrees of rotation)
RTd – rifling twist direction (right = clockwise from the
shooter’s perspective)
Click – assigns an angular value to sight clicks
Environment Screen
Auto – controls whether values for temperature,
barometric pressure, and relative humidity are
obtained automatically (from the Kestrel’s weather-
meter functions) or are manually set by the user.
Lat – allows the user to specify the latitude (north or
south of the equator) that will be used when
calculating Coriolis corrections.
Temp – temperature
SP – station pressure (actual pressure at the
gun’s location)
RH – relative humidity
Dalt – density altitude (calculated from pressure,
temperature & humidity)
Coriol – controls whether Coriolis corrections are
included in ballistic calculations.
Wind – controls whether wind direction is controlled
manually or automatically.
Range Card Screen
Elev – the elevation sight correction
Wndg – the windage sight correction based on WS1
(see Target screen, above)
Wdg2 – the windage sight correction based on WS2
(see Target screen, above)
Lead – the lead sight correction (for a moving target)
RemV – the downrange bullet velocity
RemE – the downrange bullet energy
ToF – the bullet’s time of flight
MaxO – the bullet’s maximum ordinate (height above
the line of sight to the target)
Ballistics Data Screen
Range – the range for which the ballistic solution
is calculated
Elev – elevation correction
Wndg – windage correction (based on WS1)
Wdg2 – windage correction (based on WS2)
Lead – lead correction, based on specified
target motion
vCori – vertical Coriolis correction
hCori – horizontal Coriolis correction
Drift – bullet drift correction