1. Akoya - Bandit OrbitVision Washington University in St. Louis School of Engineering and Applied Science Erin BeckJustin Char Lane HauryCash Carr

2. Goals: Simulate the complete Akoya-Bandit camera-to-radio system Photograph LED array as it would appear on Akoya in daylight Photograph the Earth as it would appear to the Akoya Earthside camera

3. Akoya - Bandit: Bandit is a 4 kg service vehicle housed within Akoya, a 25 kg parent satellite. On orbit, Bandit will undock from Akoya, navigate relative to it while completing simple to complex tasks, and redock. Bandit navigates by observing a pattern of LEDs on Akoya’s surface and calculating position. Two cameras aid navigation: BanditCam: b/w camera that photographs LEDs, from which software determines position AkoyaCam Dockside: color camera looking at Bandit from the dock, used for backup sighting of Bandit One additional camera: AkoyaCam Earthside: color camera to photograph Earth

4. SHOT II: BanditCam: Photographs sample LED array (b/w) Transmits locally over 900 MHz radios, simulating the link between Bandit and Akoya. Then transmits over 2.4 GHz radios to ground, simulating the link from Akoya to ground. AkoyaCam Earthside: Photographs Earth horizon (color) Transmits directly over 2.4 GHz radios to ground. Accelerometer: We hope to have an accelerometer as a secondary position sensor on Bandit. SHOT II includes one accelerometer; we are measuring its sensitivity.

5. Mass: 1.62 kg before tape Power: 20 1.5V Li batteries (72 W-hr for components, 18 W-hr for heaters) Radio frequencies: 900 MHz at 100 mW, 2.4 GHz at 1 W Balloon attachment: 1/4 inch threaded brass rod through center, attached with washer and nut on each end

6. Drop Test Stair Pitch Test Whip Test Cooler Test Table Test: Photographs successfully downlinked across the table At 115200 baud, we receive one 360x240 b/w image in ~30 sec or one 360x240 color image in ~80 sec.

7. Demonstrate end-to-end feasibility and functionality of Akoya- Bandit OrbitVision system. Radios: Operate without interfering with each other Lab test showed no interference. We could use the exact same system at higher power on orbit. BanditCam: See LEDs. We may not be able to distinguish different shades as different colors, but we expect that the 100 millicandela Super Blue LEDs will be most visible. AkoyaCam Earthside: We receive clear long-distance images, currently in one color only. Accelerometer: The manufacturer claims extreme sensitivity, but it is unproven. We expect some readings, but have no prediction of magnitude.

8. Internal layout of components Mobile Ground Station User Interface End-to-end demonstration of BanditCam Includes the following components and their connections: BanditCam 900 MHz transmitter and receiver Frame Capture Board Atmel (ATmega128) 2.4 GHz transmitter and receiver MGS computer