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AMSAT FOX. Tony Monteiro, AA2TX VP, Engineering. AMSAT Forum Dayton Hamvention 2011. Background. AMSAT-Echo (AO-51) is the most popular ham satellite Can be worked with simple equipment 6 years old Experiencing battery issues. Background (cont). Need succession plan for “ easysat ” mode

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amsat fox

AMSAT FOX

Tony Monteiro, AA2TX

VP, Engineering

AMSAT Forum

Dayton Hamvention 2011

background
Background
  • AMSAT-Echo (AO-51) is the most popular ham satellite
  • Can be worked with simple equipment
  • 6 years old
  • Experiencing battery issues
background cont
Background (cont)
  • Need succession plan for “easysat” mode
  • Launch costs have gone up dramatically
  • MicroSats like AO-51 were once the low-cost path to orbit – not any more!
opportunistic launch strategy
Opportunistic Launch Strategy
  • Unique/special circumstances (AO-40)
  • Rideshare opportunities (RS-10/11)
  • ARISS Program (ARISSat-1)
    • ISS orbit only
  • CubeSat Launches
cubesat
CubeSat
  • Small satellite specification developed by Stanford and Cal-Poly universities
  • Standard satellite dimensions allows for pooled launches via P-POD deployer
  • “Mass production” lowers costs and increases launch opportunities
cubesat challenges
CubeSat Challenges
  • Very small size (1U)
    • 10 cm cube (4” x 4” x 4”)
    • 1/16 volume of AO-51
  • Weight limit
    • 1.33 kg (3 lbs)
  • Limited area for solar panels
    • 1/6 surface area of AO-51
  • Limited space for antennas
technical approach
Technical Approach
  • Use “cell phone” electronics for small size and low power
  • Use deployable solar panels to generate more power
  • Use deployable antennas
target specifications
Target Specifications
  • 600 – 800 km polar orbit
  • Mode U/V (70 cm up, 2m down)
  • FM Analog Transponder
  • Software Defined Transponder (SDX)
  • Science experiment
special design features
Special Design Features
  • Can tolerate battery failure (open or short)
    • Will run on solar power only
  • Can tolerate IHU processor failure
    • FM analog transponder only
slide10

System Diagram

Solar

Cells

PSU

Battery

I/Q

Rx

Sensors

IHU

FM

Rx

Tx

Experiment

cubesat advantages
CubeSat Advantages
  • Large and growing technical community
    • Boeing
  • Positions AMSAT to work with universities
    • SUNY Next Gen projects
  • Affordable and available launch opportunities
    • Regularly scheduled launches
    • Relatively low-cost launches
    • NASA Launch Initiative (subsidized or free)
university research
University Research
  • Stacked Cubes - 3U (12” x 12” x 4”)
  • Inflatable antennas
  • Active attitude control (including 3-axis)
  • Solar panel deployment schemes
  • Micro propulsion for on-orbit maneuvers
status
Status
  • Project Started - Oct 2010
  • System Requirements Spec - Jan 2011
  • Concept Review – April 2011
  • SUNY student projects completed – May 2011
  • Model in AMSAT booth
thank you

Thank you

AMSAT FOX

Tony Monteiro, AA2TX

AA2TX@amsat.org

AMSAT Forum

Dayton Hamvention 2011