Differences

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--- projects:aerosol [2008/02/06 13:12] – photos laurenceb
+++ projects:aerosol [2008/07/19 23:33] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
  This is a HAB project financed by the [[http://www.atm.ox.ac.uk/|University of oxford AOPP department]], to sample carbon particles from the troposphere and stratosphere, hopefully allowing some vertical resolution to be achieved.
- The aim is to design an build a modular high altitude balloon system that can be modified for future missions, and avoids proprietary hardware at all possible stages.
+ The aim is to design an build a modular high altitude balloon system that can be modified for future missions, and avoids proprietary hardware at all possible stages.{{projects:report_v4.pdf|A more detailed description of the project}}
+==== Assembled payload ====
+{{projects:dscn1017.jpg?700|}}
+{{projects:dscn1001.jpg?700|}}
+{{projects:dscn0999.jpg?700|}}
+==== Parachute and cutdown ====
+{{projects:dscn1015.jpg?350|}}
+{{projects:dscn1014.jpg?350|}}
 ==== Code ====
- This is [[aerosol_code|under development]], the main board is running python.
+ This is under development, the [[aerosol_code|main board]] is running python, the [[daughterboard_code|daughterboard]] is powered by an AVR running c (AVR-GCC).
 ==== GPS ====
@@ Line 17: / Line 32: @@
  This was a very tricky issue, the plan is to use an electrostatic precipitator to collect particles directly onto SEM targets. The targets are grounded, and mounted at the bottom of a perspex tube. Electrodes on the opposite side of the tube are charged to high -ive voltage, causing corona discharge. There is a pump at one end of the tube, with conventional filters either side to prevent contamination.
- A differential pressure transducer is used to calculate flow rate. A piston on the end of the sampling tube is closed using a resistor cutter at balloon burst or cutdown, to protect the sample during descent. The sampling tube is removed from the gondola upon recovery, and opened in a cleanroom for analysis.
+ A differential pressure transducer is used to calculate flow rate. A [[http://video.google.co.uk/videoplay?docid=3852358062544335883&hl=en-GB|piston]] on the end of the sampling tube is closed using a resistor cutter at balloon burst or cutdown, to protect the sample during descent. The sampling tube is removed from the gondola upon recovery, and opened in a cleanroom for analysis.
+{{projects:dscn0984.jpg?700|}}
+{{projects:dscn0981.jpg?700|}}
+{{projects:dscn0985.jpg?700|}}
+{{projects:dscn0987.jpg?700|}}
 __HV multipliers__ ( two 2KV units for upper troposphere and stratosphere, and a 5KV unit for lower troposhere)
@@ Line 63: / Line 86: @@
 {{projects:dscn0961.jpg?700|}}