1. RAFT Radar Fence Transponder MIDN 1/C Lauren Baker - Team Leader/ Ground Support MIDN 1/C Brandon Colvin – Communications/ Power MIDN 1/C Robert Tuttle – Structure/ Thermal

2. Background 30 to 50 in Construction AIAA/USU Small Sat Conference 30% of papers were for PICO, NANO and CUBEsats All smaller than 10 cm How to Track them???

3. Mission Statement The mission of CUBESAT-RAFT is to:  provide the Navy Space Surveillance, or NAVSPASUR, radar fence with a means to determine the bounds of a constellation of CUBESATS otherwise undetectable to the radar fence  to enable NAVSPASUR to independently calibrate their transmit and receive beams using signals from CUBESAT-RAFT. - This must be accomplished with two CUBESATS, one that will actively transmit and receive, and one with a passively augmented radar cross- section. Additionally, CUBESAT-RAFT will provide experimental communications transponders for the Navy Military Affiliate Radio System, the United States Naval Academy’s Yard Patrol crafts, and the Amateur Satellite Service.

4. NSSS Radar Fence

5. Transmit Power:768 kW of power from Lake Kickapoo, TX Antenna Gain:About 30dB Transmission Sites: Lake Kickapoo, Texas Jordan Lake, Alabama Gila River, Arizona Receiving Sites:San Diego, California Elephant Butte, New Mexico Red River, Arkansas Silver Lake, Mississippi Hawkinsville, Georgia Tattnall, Georgia

6. RAFT1 and MARScom

7. RAFT1 Mission Architecture

8. Audio Spectragram Example audio Spectragram Expected from one-way Doppler Duration about 1-3 secs

9. Pass Geometry

10. Raft1 Block Diagram

11. RAFT1 Comms and Multiplexing

12. RAFT1 Internal Diagram

13. RAFT1 Magnetic Attitude Control

14. MARScom Mission Architecture

15. Military Affiliated Radio System The Mission of the MARS system is to:  Provide auxiliary communications for military, federal and local disaster management off icials during periods of emergency or while conducting drills….  Assist in effecting normal communications under emergency conditions.  Handle morale and quasi-official message and voice communications traffic for members of the Armed Forces and authorized U.S. Government civilian personnel  Provide, during daily routine operations, a method of exchanging MARSGRAMS and … contacts between service personnel and their families back home.

16. Yard Patrol Craft Application

17. MARScom Block Diagram

18. RAFT Deployment

19. RAFT Antenna Separation Mechanisms

20. RAFT Antenna Springs

21. RAFT Schedule  Systems Definition complete – 15 APR 2004  Systems Requirement Baseline – 30 APR 2004 (SRR)  Prelim.Design Review (Internal USNA) – 15 MAY 2004  System Design Complete – 15 OCT 2004 (CDR)  Engineering Model Available for Testing – 15 Dec 2004  Flight Hardware for Integration/Flight – 15 May 2005  Launch – Sept 2005