CCD Detection System for Rainbow Camera CCD readout system for specific lines of the CCD

Earth Science Projects for Olin College Students:J. Vanderlei Martins UMBC Physics Departmentand NASA GSFC Climate and Radiation Branch CCD Detection System for Rainbow Camera CCD readout system for specific lines of the CCD

CubeSat Sun-Sensor CCD or CMOS based Position Sensing Detector Based (http://www.on-trak.com/theory.html) Solar Cell based

CubeSat Attitude Control System Sun-Sensor to determine pointing Magnetorquers to control the satellites attitude

Science The Big Picture: Interaction Between Aerosols and CloudsAndreae, et al. Science 2004 Smoking Rain Clouds over the Amazon

Cloud Droplet Measurements from Cloud RainbowF-M. Breon, P. Goloub, 1998.

Project 1- CCD Detection System for Rainbow CameraInterested in Only Selected lines of the CCDMost CCD/Cameras allow for windowing or binning but not for reading a bunch of selected lines along the CCD.Reading only selected lines increases speed and reduces data volume

Example of stripe filter: need to read only one line in the center of each stripe

Project 2 - CubeSat Sun-SensorOne face of the satellite must always point to the sunmaximizes solar incidence in the solar panelAssures optimum geometry for cloud-side measurementsFeedback from Sun-Sensor increases accuracy of the Attitude and Determination Control System

Collision-CoalescenceWater-ice processesAerosol Impactin Microphysics?watermixed phaseiceTemperatureiceWaterMore Science: Cloud-Side Profiling

Cloud CubeSatOrbit Geometry:

Cloud-CubeSatCMOS Detector ArrayEx: SunSensor from Nat. Cheng Kung University for the PACE CubeSatOther options:PSD analog position sensitive detectorSolar cell pyramid

Project 3 - CubeSat Attitude Control SystemCan we control the attitude of the satellite using Earths magnetic fieldHow much torque is needed and how to implement an active control system to keep one face of the satellite always pointing to the sun.Sun-Sensor can be used as feedback mechanism

Magnetorquer CoilsUse Sun-Sensor signal to align one face of the satellite (or solar panel) to the sun