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ThumbSat
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ThumbSat is a femtosatellite, a small free-flying satellite with an operational life of about two months in low-earth orbit where it collects and relays data. Description The ThumbSat standard payload interface is designed to allow payloads to be fully designed and built without engineering support from the ThumbSat team; however the ThumbSat business model allows for full engineering support and payload definition. The standard interface has the following hardware; 3.6V unregulated power 5V regulated power 6x analoogue in 1x analogue out (may be expanded using PWN channels) 2x USART interfaces 1x I2C interface 1x SPI interface 10x digital I/O"" The satellite bus has communication and power hardware and a number of on-board sensors available to experimenters. The system offers a total energy budget of 1.8 Wh and transmits data at 100 mW operating in the 400 MHz band.]] Sensors 2048 x 1536 pixel CMOS GPS receiver Thermal sensors Gyroscope Magnetometer Accelerometer The satellite bus is in the "Mini" configuration, expandable from height up ("Mini") through "Midi" to "Maxi": height. The mass budget for each size is given as ("Mini"), ("Midi"), and "Maxi". The system has a claimed "total energy budget" of 1.8 Wh, with transmission at 100 mW in the 400 MHz band. The camera, which is said to be able to accommodate lenses ranging in application from telescopic to microscopic, would take 2048 x 1536 pixel photos. Additionally, the satellite design specs include mention of a GPS receiver, temperature sensors, a gyroscope (presumably MEMS), a magnetometer and an accelerometer, though no parts are specified. The interface specs provide for 3.6V unregulated power, 5V regulated power, 6 analog inputs, one analog output (expandable via PWM channels), two USARTs, one I²C interface, one SPI interface, and 10 digital I/O channels. Add-on components could be “bus” related, such as attitude control, communications and algorithms, or it might be to do with science instruments, such as special optics and sensors. See Also
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