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CCD Detection System for Rainbow Camera CCD readout system for specific lines of the CCD - PowerPoint PPT Presentation


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Earth Science Projects for Olin College Students: J. Vanderlei Martins UMBC Physics Department and 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

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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 satellite’s attitude

science the big picture interaction between aerosols and clouds
Science – The Big Picture: Interaction Between Aerosols and Clouds

Andreae, et al. – Science 2004Smoking Rain Clouds over the Amazon

project 1 ccd detection system for rainbow camera
Project 1- CCD Detection System for Rainbow Camera
  • Interested in Only Selected lines of the CCD
  • Most 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
project 2 cubesat sun sensor
Project 2 - CubeSat Sun-Sensor
  • One face of the satellite must always point to the sun
    • maximizes solar incidence in the solar panel
    • Assures optimum geometry for cloud-side measurements
  • Feedback from Sun-Sensor increases accuracy of the Attitude and Determination Control System
slide7

More Science: Cloud-Side Profiling

ice

Temperature

Water

ice

Aerosol Impact

in Microphysics?

mixed

phase

Water-ice

processes

water

Collision-Coalescence

cloud cubesat

Sun-Sensor

Cloud-CubeSat

Ex: SunSensor from Nat. Cheng Kung University for the PACE CubeSat

  • Other options:
  • PSD – analog position sensitive detector
  • Solar cell pyramid

CMOS Detector Array

project 3 cubesat attitude control system
Project 3 - CubeSat Attitude Control System
  • Can we control the attitude of the satellite using Earth’s magnetic field
  • How 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
slide11

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

Magnetorquer Coils