PDR Presentation

Team JHK

Experiment TIC

February 27, 2003

Science Objective

Our goal is to learn if IR radiation is dependent on temperature or altitude in the upper atmosphere. We are also going to study temperature as a function of altitude during ascent.

Payload Design

The payload consist of a HOBO which will have an IR sensor and temperature probe attached. A small digital camera will be included separate from the HOBO.

Fabrication and Testing

• First, the I-V converter & amplifier will need to be designed and constructed. Next, the temperature probe will be directly connected to the hobo, while the IR sensor and hobo will be connected using the IV converter & amplifier. That will complete the fabrication of the hobo system. The camera will be only need to be programmed to sample at the determined rate, before the camera system is ready for testing. The whole and individual pieces will each be tested in detail to make sure it operates properly using the methods stated in the construction plan

Fabrication Test List         Circuitry• o       Design the IV converter & amplifier• o       Construction the IV converter & amplifier

•           Programming

• o Program the specific rate of sample for the camera and the hobo         Testing

• o Test the hobo system to ensure the batteries do not fail, that the IR and temperature sensor works properly, that the rate of sample is accurate, and that the memory is sufficient for the flight.

• o Test the camera system to ensure the batteries do not fail, the camera operates at the correct rate of sample, and that the memory is sufficient for the flight.

• o Test the system as a whole to ensure it is properly insulated and protected from any possible damage or temperature change during the flight.

Mission Operations

The payload will be launched and tracked from the ground. Upon recovery the EEPROM will be downloaded and the data converted to temperatures and light intensities to determine if a correlation exists between the two.

Weight Budget

Item Weight HOBO + Battery 50gTemperature Probe 10gIR Sensor 10gCamera + Battery 42gI-V Converter/Amplifier 50g Total Weight 162gLeftover weight for box and insulation 838g

Data Analysis

Temperature and IR light intensity will be measured every ten seconds during the flight. All data will be stored on board and recovered with the payload. Software needs to be developed to convert voltages from the sensors to temperature and IR light intensity.

Power Budget

HOBO- 1s/10s x 20mA(max current) x 2 sensors = 4mA, 4mA x 6 hours = 24 mA/ hr

Will require a 5V battery > 25mA/hr

Camera- 1s/180s x 25mA = .138mA, .138mA x 6 hours = .833mA/hr

Will require a AAA battery > 1mA/hr

Op Amp- 1s/10s x 20mA(max current) = 2mA, 2mA x 6 hours = 12 mA/ hr

Will require a 5V battery > 13mA/ hr

All of batteries will be lithium batteries ordered from Energizer

Master Budget

Items to be Purchased Estimated Cost Infrared Sensor $200

Digital Camera $40 HOBO $120

Batteries $20OpAmp $20 Total Estimated Cost $400

WBS

See Handouts

Credits

1.    Online Source: National Institute of Water and Atmospheric Research (NIWA), February 16, 2003, http://www.niwa.co.nz/edu/students/faq/layers

2.      Online Source: Online Journey through Astronomy, February 16, 2003, http://csep10/phys/utk/edu/astr161/lect/earth/atmosphere.html

3.      Online Source: NASA Website, February 16, 2003, http://liftoff.msfc.nasa.gov/academy/space/atmosphere/html

4.      Online Source: Earth Zone Website: Absorption, Radiation, & Greenhouse, February 23, 2003, http://207.10.97.102/earthzone/lessons/07meteor/greenhouse.html

5.      Online Source: University of Chicago, February 23, 2003, http://geosci.uchicago.edu/~archer/EnvChem/Labs/modtran.lite.html

6.      Online Source: Caltech University, February 23, 2003, http://www.ipac.caltech.edu/Outreach/Edu/infrared.html

7.      Online Source: Seiko Instruments, February 23, 2003, http://www.sih.com.hk.html

8.      Catalog Source: Edmund Industrial Optics, Optics and Optical Instruments Catalog, 2002, p. 191

Online Source: US Sensor Corporation, February 23, 2003, http://www.ussensor.com/products/precintr.html