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  NEAR SPACE ENGINEERING

NSE 009 Flight Summary

5/29/2013

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Launch conditions were far less than optimal. The ground wind was out of the west south-west at a steady 20 mph with gust up to 30 mph. Inflation was hampered by the balloon oscillating from the gusts. Therefore ascertaining an accurate lift proved impossible and our ascent speed hovered around 2.5 ft/s. An hour into the flight the balloon altitude had only reached 49k feet.
 
The technical aspects of the flight were almost flawless.We sent aloft 1 still camera, an upward and sideward pointing video camera, a live video transmitter, and a LabQuest recording alpha, beta, and gamma radiation levels. In addition a new and improved cut down system was on board. The cut down system work perfectly. A couple of minutes prior to launch the timer was set to 60 minutes and executed on time. The only hiccup occurred with the radiation meter. A switch was not moved prior to launch so no data was recorded. 

The live video feet exceeded our performance metrics and maintained contact until 30 kft. Once the command module was cut from the balloon we did not regain the live video feed. We're not sure why as we expected the link to reestablish once the module fell below the cut out altitude. The agreed upon most likely culprit was that the antenna was spinning to fast. 

Overall a good flight considering the bad launch conditions. 
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Comm Test

4/8/2013

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We performed a comm test today. Both tracking transmitters acquired gps and transmitted. Initially one had a low power level from the batteries so it simply emitted clicks. We also ran the video transmitter during the test to see if any interference would occur. We did not get any interference as expected. The trackers transmit at 144.39 MHz and the video transmitter operates at 2.3 GHz. 
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Video trouble

4/8/2013

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Helen is having trouble with the transmitter/receiver. She can not get the receiver to change channels. However it seems to be intermittent. Hopefully she will get it figured out and it won't be a problem. 
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Project details -  

3/12/2013

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Mikaela is completing her revision of the cut down system. She is adding an LCD interface and a keypad. These improvements will allow us to input exact times for the cut-down, perform cut test, monitor wire usage, and battery status.   A big improvement from the previous version. Also a three position key switch will be used to control power on/off, and keypad lock. 

Helen's project will be to create a live video feed from the balloon to the bus. We have ordered the materials and are excited about the project. The video camera is about an inch cube in size and is connected to a transmitter that is about 2 inches by 1 inch by 1/4 inch. The frequency is 2.3 GHz. The receiver will be hooked up to a screen on board the bus. The signal will also be routed to a video recorder.

Kenny will be testing electronic equipment in near space conditions. He'll be sending up a cell phone. His hypothosis is the LCD screen will break due to pressur


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    pblount

    Course Instructor

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