# **************************************************************************** # CUI # # The Advanced Framework for Simulation, Integration, and Modeling (AFSIM) # # The use, dissemination or disclosure of data in this file is subject to # limitation or restriction. See accompanying README and LICENSE for details. # **************************************************************************** ############################################################################### # ------ UNCLASSIFIED ------ # # This is a postulated red short range ballistic missile (red_srbm_4), which is # based on the two-stage, solid-propellant red short range ballistic missile # (red_srbm_3) with a third stage derived from the second stage by making # it shorter and carrying a correspondingly reduced amount of propellant. # ############################################################################### # # NOTE: If you modify any parameter in this file, you must rerun 'weapon_tools' # with 'red_srbm_4_lcg.txt' as input to regenerate the launch computer data. # ############################################################################### # # ***** WARNING ***** WARNING ***** WARNING ***** WARNING ***** WARNING ***** # # This definition is intended to be EXPORTABLE. It is defined using publicly # available, attributable sources. DO NOT ADD ANYTHING BASED ON OTHER SOURCES! # # ***** WARNING ***** WARNING ***** WARNING ***** WARNING ***** WARNING ***** # ############################################################################### # # This model is built using data from unclassified sources as follows: # # 1) "Technical Addendum to the Joint Threat Assessment on the Iran's Nuclear # and Missile Potential -- The Sejil Ballistic Missile", Theodore Postol, 2009 # # 2) "Professional Development Short Course on Tactical Missile Design" # Eugene Fleeman, http://genefleeman.home.mindspring.com # ############################################################################### ############################################################################### # Support for explicit representation of spent stages # # Platforms will be created for spent stages if one the global script variables # is defined as follows: # # script_variables # SHOW_SPENT_STAGES["ALL"] = true; # For any weapon # SHOW_SPENT_STAGES["RED_SRBM_4"] = true; # For just this weapon type # end_script_variables ############################################################################### include_once show_spent_stages.txt include_once typical_ballistic_missile_aero.txt # ----------------------------------------------------------------------------- ##### Spent Stage 1 aero RED_SRBM_4_SPENT_STAGE_1_AERO TYPICAL_SPENT_STAGE_AERO reference_area 13.203 ft^2 # Ref 1 - 1.25 m diam (4.1 ft) end_aero infrared_signature RED_SRBM_4_SPENT_STAGE_1_INFRARED_SIG constant 1 watts/steradian # Generic signature, not intended to be representative end_infrared_signature optical_signature RED_SRBM_4_SPENT_STAGE_1_OPTICAL_SIG constant 1 m^2 # Generic signature, not intended to be representative end_optical_signature radar_signature RED_SRBM_4_SPENT_STAGE_1_RADAR_SIG constant 1 m^2 # Generic signature, not intended to be representative end_radar_signature platform_type RED_SRBM_4_SPENT_STAGE_1 WSF_PLATFORM icon Scud_Missile infrared_signature RED_SRBM_4_SPENT_STAGE_1_INFRARED_SIG optical_signature RED_SRBM_4_SPENT_STAGE_1_OPTICAL_SIG radar_signature RED_SRBM_4_SPENT_STAGE_1_RADAR_SIG mover WSF_GUIDED_MOVER integration_timestep 0.01 secs stage 1 aero RED_SRBM_4_SPENT_STAGE_1_AERO total_mass 4862 lbs # Ref 1 - 2210 kg (4862 lbs) end_stage end_mover processor fuse WSF_GROUND_TARGET_FUSE end_processor end_platform_type # ----------------------------------------------------------------------------- ##### Spent Stage 2 aero RED_SRBM_4_SPENT_STAGE_2_AERO TYPICAL_SPENT_STAGE_AERO reference_area 13.203 ft^2 # Ref 1 - 1.25 m diam (4.1 ft) end_aero infrared_signature RED_SRBM_4_SPENT_STAGE_2_INFRARED_SIG constant 1 watts/steradian # Generic signature, not intended to be representative end_infrared_signature optical_signature RED_SRBM_4_SPENT_STAGE_2_OPTICAL_SIG constant 1 m^2 # Generic signature, not intended to be representative end_optical_signature radar_signature RED_SRBM_4_SPENT_STAGE_2_RADAR_SIG constant 1 m^2 # Generic signature, not intended to be representative end_radar_signature platform_type RED_SRBM_4_SPENT_STAGE_2 WSF_PLATFORM icon Scud_Missile infrared_signature RED_SRBM_4_SPENT_STAGE_2_INFRARED_SIG optical_signature RED_SRBM_4_SPENT_STAGE_2_OPTICAL_SIG radar_signature RED_SRBM_4_SPENT_STAGE_2_RADAR_SIG mover WSF_GUIDED_MOVER integration_timestep 0.01 secs stage 1 aero RED_SRBM_4_SPENT_STAGE_2_AERO total_mass 1914 lbs # Ref 1 - 870 kg (1914 lbs) end_stage end_mover processor fuse WSF_GROUND_TARGET_FUSE end_processor end_platform_type # ----------------------------------------------------------------------------- ##### Spent Stage 3 aero RED_SRBM_4_SPENT_STAGE_3_AERO TYPICAL_SPENT_STAGE_AERO reference_area 13.203 ft^2 # Ref 1 - 1.25 m diam (4.1 ft) end_aero infrared_signature RED_SRBM_4_SPENT_STAGE_3_INFRARED_SIG constant 1 watts/steradian # Generic signature, not intended to be representative end_infrared_signature optical_signature RED_SRBM_4_SPENT_STAGE_3_OPTICAL_SIG constant 1 m^2 # Generic signature, not intended to be representative end_optical_signature radar_signature RED_SRBM_4_SPENT_STAGE_3_RADAR_SIG constant 1 m^2 # Generic signature, not intended to be representative end_radar_signature platform_type RED_SRBM_4_SPENT_STAGE_3 WSF_PLATFORM icon Scud_Missile infrared_signature RED_SRBM_4_SPENT_STAGE_3_INFRARED_SIG optical_signature RED_SRBM_4_SPENT_STAGE_3_OPTICAL_SIG radar_signature RED_SRBM_4_SPENT_STAGE_3_RADAR_SIG mover WSF_GUIDED_MOVER integration_timestep 0.01 secs stage 1 aero RED_SRBM_4_SPENT_STAGE_3_AERO total_mass 957 lbs # Assumed 50% of stage 2 end_stage end_mover processor fuse WSF_GROUND_TARGET_FUSE end_processor end_platform_type # ----------------------------------------------------------------------------- ##### Main object observatbles infrared_signature RED_SRBM_4_INFRARED_SIG state default band default constant 654321 w/sr # Large signature when boosting state boost_complete band default constant 1 w/sr # Generic signature after burnout end_infrared_signature optical_signature RED_SRBM_4_OPTICAL_SIG constant 1 m^2 # Generic signature, not intended to be representative end_optical_signature radar_signature RED_SRBM_4_RADAR_SIG constant 1 m^2 # Generic signature, not intended to be representative end_radar_signature # ----------------------------------------------------------------------------- #### Nominal lethality data. weapon_effects RED_SRBM_4_EFFECT WSF_GRADUATED_LETHALITY radius_and_pk 1000.0 m 1.0 # Kills target if impacting within 1000 m end_weapon_effects # ----------------------------------------------------------------------------- #### Aero during various flight phases aero RED_SRBM_4_STAGE_1_AERO TYPICAL_MISSILE_AERO reference_area 13.203 ft^2 # Ref 1 - 1.25 m diam (4.1 ft) end_aero aero RED_SRBM_4_STAGE_2_AERO TYPICAL_MISSILE_AERO reference_area 13.203 ft^2 # Ref 1 - 1.25 m diam (4.1 ft) end_aero aero RED_SRBM_4_STAGE_3_AERO TYPICAL_MISSILE_AERO reference_area 13.203 ft^2 # Assumed shortened stage 2 end_aero aero RED_SRBM_4_RV_AERO TYPICAL_RV_AERO reference_area 6.469 ft^2 # Ref 1 - Diam is 70% of other stages - diam 2.87 ft end_aero ############################################################################### #### Mover definition mover RED_SRBM_4_MOVER WSF_GUIDED_MOVER integration_timestep 0.005 secs update_interval 0.05 secs stage 1 aero RED_SRBM_4_STAGE_1_AERO total_mass 32384 lbs # Ref 1, 14720 kg (32384 lbs) fuel_mass 27522 lbs # Ref 1, Empty wgt 2210 kg (4862) specific_impulse 235 sec # Ref 1, Average of 220-250 # thrust_duration 50 sec # Ref 1 thrust 122320 lbf # Ref 1, 55600 kgf (122320 lbf) end_stage stage 2 aero RED_SRBM_4_STAGE_2_AERO total_mass 12716 lbs # Ref 1, 5780 kg (12716 lbs) fuel_mass 10802 lbs # Ref 1, Empty wgt 870 kg (1914 lbs) specific_impulse 250 sec # Ref 1 # thrust_duration 50 sec # Ref 1 thrust 47960 lbf # Ref 1, 21800 kgf (47960 lbf) end_stage stage 3 aero RED_SRBM_4_STAGE_3_AERO total_mass 6358 lbs # Assumed 50% of stage 2 fuel_mass 5401 lbs # Assumed 50% of stage 2 specific_impulse 250 sec # Same as stage 2 # thrust_duration 56 sec # Calculated thrust 23980 lbf # Assumed 50% of stage 2 end_stage stage 4 aero RED_SRBM_4_RV_AERO total_mass 1100 lbs # Assumed using a 500 kg warhead end_stage end_mover ############################################################################### processor RED_SRBM_4_GUIDANCE WSF_GUIDANCE_COMPUTER # Go vertical for a short time. phase LIFTOFF guidance_delay 100.0 sec # NOTE: Do not use altitude for the criteria for starting pitch over as # trajectory is VERY sensitive to the TIME when pitch over starts. If it # were to be used, a minor changes in the launcher altitude would cause # pitch over to start at a different time! next_phase PITCH_OVER when phase_time >= 2.0 sec # About 100 ft end_phase # Pitch over to the desired flight path angle from the launch computer. phase PITCH_OVER commanded_flight_path_angle from_launch_computer proportional_navigation_gain 0.0 # Don't guide to target velocity_pursuit_gain 0.0 # Don't guide to target # maximum_commanded_g 1.0 g maximum_commanded_g 0.5 g next_phase BALLISTIC when on_commanded_flight_path_angle end_phase # Continue flight with zero alpha, a gravity turn. phase BALLISTIC # Turn the guidance processor off once pure ballistic mode is started. # This shaves several percent off the processor time. on_entry TurnOff(); end_on_entry guidance_delay 9000.0 sec end_phase end_processor ############################################################################### platform_type RED_SRBM_4 WSF_PLATFORM icon Scud_Missile infrared_signature RED_SRBM_4_INFRARED_SIG optical_signature RED_SRBM_4_OPTICAL_SIG radar_signature RED_SRBM_4_RADAR_SIG weapon_effects RED_SRBM_4_EFFECT mover RED_SRBM_4_MOVER #show_status end_mover processor guidance RED_SRBM_4_GUIDANCE #show_status #show_graphics end_processor processor fuse WSF_GROUND_TARGET_FUSE # If the target is killed by another weapon we want to still keep going. coast_time_on_loss_of_target 10000.0 secs end_processor weapon stage_1 WSF_EXPLICIT_WEAPON launched_platform_type RED_SRBM_4_SPENT_STAGE_1 launch_delta_v -3.0 0.0 0.0 ft/s # Provide a slight nudge quantity 1 end_weapon weapon stage_2 WSF_EXPLICIT_WEAPON launched_platform_type RED_SRBM_4_SPENT_STAGE_2 launch_delta_v -3.0 0.0 0.0 ft/s # Provide a slight nudge quantity 1 end_weapon weapon stage_3 WSF_EXPLICIT_WEAPON launched_platform_type RED_SRBM_4_SPENT_STAGE_3 launch_delta_v -3.0 0.0 0.0 ft/s # Provide a slight nudge quantity 1 end_weapon script void on_stage_separation(int aStage) extern Map SHOW_SPENT_STAGES; if (SHOW_SPENT_STAGES["ALL"] || SHOW_SPENT_STAGES["RED_SRBM_4"]) { if (aStage == 1) Weapon("stage_1").Fire(WsfTrack()); if (aStage == 2) Weapon("stage_2").Fire(WsfTrack()); if (aStage == 3) Weapon("stage_3").Fire(WsfTrack()); } end_script script void on_stage_burnout(int stage) if (stage == 3) { PLATFORM.SetAuxData("BOOST_COMPLETE", true); PLATFORM.SetInfraredSigState("boost_complete"); } end_script end_platform_type ############################################################################### launch_computer RED_SRBM_4_LAUNCH_COMPUTER WSF_BALLISTIC_MISSILE_LAUNCH_COMPUTER surface_to_surface_table red_srbm_4_launch_data.txt end_launch_computer ############################################################################### # Provide the aero and mass data to WSF_BALLISTIC_MISSILE_LAUNCH_COMPUTER. This # is 'truth data' used by the launch computer for 'trajectory estimation'. ballistic_missile_launch_computer target_data RED_SRBM_4 aero RED_SRBM_4_RV_AERO # Aero type of final stage mass 1100 lbs # Mass of final stage end_target_data end_ballistic_missile_launch_computer ############################################################################### weapon RED_SRBM_4 WSF_EXPLICIT_WEAPON # The location offset puts the weapon center at half the length - 1 m. # This assumes the scenario creator puts the launching platform at 1 m agl. location 0.0 0.0 -9.955 m # Ref 1, length = 18.21 m + 3.7 m (21.91m) launched_platform_type RED_SRBM_4 launch_computer RED_SRBM_4_LAUNCH_COMPUTER #debug #show_results end_launch_computer # The missiles are launched vertically. # We can't specify 90 degrees because of a singularity tilt 89.9 degrees # This causes a call to the launch computer to compute the predicted intercept. # The launcher will then be cued to the proper angles (Subject to the slewing # limits defined below). This is a bit of a hack until the guidance computer # is changed... cue_to_predicted_intercept true slew_mode azimuth azimuth_slew_limits -180 deg 180 deg # Default to a single weapon on the vehicle quantity 1 # Abort the launch if the launch computer didn't provide the required data require_loft_angle end_weapon