Student Made Ultraviolet Radiation Detector

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StuMURD
Student Made Ultraviolet Radiation Detector
Presented for your approval by
THE LATE BALLOONERS
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Science Objectives
To measure the intensity of ultraviolet (UV)
electromagnetic radiation during the payloads
ascent through the stratosphere
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DESIGN
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The StuMURD photo detectors

• SiC - Photodiode JEC 0.3S
• -spectral range 210 - 380 nm
• -active area 0.22 mm²
• -UV-responsivity 0.13 A/W

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Orientation of Photo detectors

• There will be four separate photodiodes placed at
  the four upper corners of the payload box. They
  will be angled upwards and placed behind
  protective transparent plates.

• This configuration will assure that at least one
  photodiode will be directly facing the sun,
  regardless of the balloons orientation to the
  sun.

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Electrical Design
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FABRICATION AND TESTING
1. An algorithm for data storage needs to be
devised and tested. It must allow for room for
the program and efficiently fill available
memory. 2. Next, the multiplexing ADC, op amps,
and photodiode circuits need to be integrated
together and to the Basic Stamp. A diode of
similar voltage tolerance, but at a lower price
than the photodiodes should be used to test
whether the circuits are functioning properly. 3.
The final step of the StuMURD circuit
fabrication will be adding the UV-photodiodes. 4.
Testing will involve finding the diodes maximum
intensity detection level that yields useful
results. 5. The HOBO is not dependent on any of
the above systems and can be tested and
calibrated upon its arrival.
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Mission Operations / Data Analysis

• Before launch StuMURD must be powered and will
  begin to gather data. The heat sources must be
  activated and placed in the payload. The payload
  must then be sealed and prepared for launch.

• StuMURD's measurements are self-contained and
  will not need any action or input from us on the
  ground during the flight.

• Following recovery of the payload, StuMURD's
  data, saved in on-board memory, will be
  downloaded to PC using the serial cable
  connection on the Basic Stamp board. Also, the
  HOBO data will be downloaded to PC using it's
  serial connection. These sets of data will be
  correlated with the telemetry data to yield all
  applicable analysis and extrapolations.

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Power Consumption
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BUDGET
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Schedule / Milestones

• Milestones
• 2/14/03 Abstract and WBS completed
• 2/20/03 Mechanical, Electrical, and Software
  designs completed
• 2/23/03 Staffing plan and budget completed
• 2/25/03 PDR completed
• 2/27/03 Present PDR
• 3/01/03 Detectors ordered
• 3/18/03 CDR completed
• 3/27/03 CDR submitted
• 3/28/03 Short lead items (circuitry components)
  ordered
• 4/10/03 Circuitry completed
• 4/20/03 Software Integration completed
• 4/25/03 Box construction completed
• 5/01/03 FRR
• 5/18/03 Flight

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TASK ASSIGNMENTS