Presentation on theme: "Using STK for on-the-air Missile/Weapons Range Mission Readiness and Mission Capability Assurance Steve Williams RT Logic 12515 Academy Ridge View Colorado."— Presentation transcript:
Using STK for on-the-air Missile/Weapons Range Mission Readiness and Mission Capability Assurance Steve Williams RT Logic Academy Ridge View Colorado Springs, CO ,
2 of ?? T400CS Channel Simulator Overview Whenever transmitters and receivers are in motion with respect to each other… Receive Station Or System
3 of ?? T400CS Channel Simulator Overview …flight and ground systems must be fully tested against these conditions. Doppler Shift Range attenuation Range delay Ambient RF noise Jammers and interferers Frequency selection, power levels and antenna characteristics Modulation type and data rate Terrain and overhead obscuration Natural and man-made atmospheric conditions Flight paths, Orbits and Ground paths Ground locations Etc. Receive Station Or System Nominal and worst-case RF COMMS Link Tests Are Critical
4 of ?? T400CS Channel Simulator Overview Flight Equipment Testing –Examples: Receivers, transmitters, modems, decoders, algorithms, etc. Ground Equipment Testing –Examples: Receivers, transmitters, modems, decoders, algorithms, etc. Inter-vehicle Links –Example: LEO passing data to GEO COMMS on the Move –Examples: Bouncing antenna on a Truck, Rolling antennas on Ships, Etc. Test Range Testing –Examples: Air-to-Ground, Ground-to-Air, Air-to-Air Weapons, Etc.
5 of ?? T400CS Channel Simulator Overview Tests must be realistic to have value –Nominal Case –Worst Case –Gold Regression Tests Relative motion and flight paths relate to most of the difficult conditions that need to be tested against RT Logic Photo
6 of ?? T400CS Channel Simulator Overview Perfect Blend –T400CS adds hardware-in-the-loop testing to STK modeling AGIs STK –Setup, visualization and physics engine –Flight paths, RF COMMS parameters, Ground locations Dont have to understand flight/orbital dynamics Calculations are complex keep focused on work, not on tool Very technical channel simulator user model without STK commanding of T400CS RT Logics T400CS Channel Simulator –Generates actual IF / RF signals High fidelity, physics-compliant test signals from STK models Phase-continuous, smooth interpolation Carrier Doppler and Signal Doppler Signal impairments (Noise, fading, plume effect, etc.)
7 of ?? T400CS Simplified Block Diagram RT Logic STK Bridge STK Engine Files Device Under Test EthernetIF / RF RF Frequency Down-Converters RT Logic T400CS Channel Simulator RF Frequency Up-Converters Signal Generators Spectrum Analyzers Channel Simulators Signal Conditioners RT Logic GUI 4DX Amplifiers STK
8 of ?? Application Example Range Testing
9 of ?? Test Ranges General Test Range Business Model –Provide area for test flights –Provide safety to test operations –Collect telemetry from vehicles under test –Return best-source telemetry to customer STK –Provides key test planning tool Channel Simulator –Provides key signal generation tool Large investments are at stake –Lives –Money (ALCM ($1M) + B-52 + Crew + Fuel + Range Staff + Range Fees …) –Range time is in short supply –Some test are one-shot and cant be reflown Together, these create a vital and unique range operations and mission assurance solution.
10 of ?? Loading ALCM to B-52 Bomb Bay USAF Photo
11 of ?? Loading ALCM on B-52 External Pylons USAF Photo
12 of ?? B-52 Takeoff USAF Photo
13 of ?? B-52 in Flight with ALCMs on External Pylons USAF Photo
14 of ?? ALCM Launch from B-52 Bomb Bay USAF Photo
15 of ?? ALCM Test Flight USAF Photo
16 of ?? ALCM Transmitting Telemetry TM Site Telemetry from ALCM Boeing Photo
17 of ?? ALCM Test Flight USAF Photo TM Site TM Site (Mobile) TM Site Same general signal at Each TM site from ALCM: Different Doppler Different Delay Different Attenuation Etc. Same general signal at Each TM site from ALCM: Different Doppler Different Delay Different Attenuation Etc.
18 of ?? ALCM Test Flight USAF Photo TM Site TM Site (Mobile) TM Site Mission Control Center: Mission safety and best- source telemetry Mission Control Center: Mission safety and best- source telemetry
19 of ?? Range and Mission Assurance Asset USAF Photo TM Site TM Site (Mobile) TM Site T400CS Channel Simulator + STK Generates the same signals, but no flight is required. Key Range and Mission Assurance Asset. T400CS Channel Simulator + STK Generates the same signals, but no flight is required. Key Range and Mission Assurance Asset.
20 of ?? Initial System Test (15 Jul UTTR)
21 of ?? UTTR – Wendover Peak TM Site UTTR Wendover Peak TM Site UTTR Goshute TM Site (as viewed from Wendover Peak TM site) RT Logic Photo
22 of ?? UTTR Wendover Peak TM Site Laptop Running STK and T400STK Bridge Spectrum Analyzer (Top) S-Band Power Amplifier (Middle Unit) RT Logic T400CS Channel Simulator (Bottom Unit) RT Logic Photo
23 of ?? UTTR Wendover Peak TM Site RT Logic Photo Transmit Signals from Wendover Peak to Goshute as if they came from the ALCM.
24 of ?? UTTR Wendover Peak TM Site RT Logic Photo
25 of ?? UTTR Test Results Assure T400CS STK bridge functionality Assure T400CS with STK can transmit properly perturbed flight path data, at RF, to a distant TM site. Assure normal MCC receipt of collected TM data. Obtain data from an actual mission ALCM Telemetry Pointing Data (Azimuth, Elevation, Time) Generate STK scenario from actual mission Run STK scenario driving Channel Simulators with actual data Compare MCC results from simulated mission to those from actual mission Run similar tests at WSMR (late August, 2009)
26 of ?? How AGI software was applied T400STK Bridge –Uses STK Engine –Receives events from STK when important changes take place –Queries STK for additional data when these events occur –Performs further T400CS-specific calculations –Sends commands to T400CS via TCP/IP Sockets –No STK modifications were necessary
27 of ?? How AGI software was applied Temporary use of Chains to specify T400CS operation.
28 of ?? How AGI software was applied STK 9 Implementation will be much better integrated.
29 of ?? Key technical attributes Key attributes of STK that enabled this –Easy and flexible scenario creation –Strong visualization –Precise physics-engine modeling –STK Engine / True Components Architecture –Excellent customer support Key attributes of T400CS that enabled this –True-to-nature signal generation –Hardware-in-the-loop capability –Client / Server instrument software model –Modular hardware and software architecture –Ethernet programmable
30 of ?? Summary STK is a world-class modeling tool. T400CS is a world-class channel simulator. Together, they enable true test. –Reduces test time and cost. –Reduces danger of some tests. –Improves depth and accuracy of test. –Keeps engineers focused on tests, not tools. –Creates a unique test system for a wide variety of applications.