ACES PROGRAM TEAM ALPHA Preliminary Design Review For Project OMEGA Presented by Alexandra Salgado (Team Spokesperson)

Mission Objective SCIENCE OBJECTIVE To study the ozone concentration in the atmosphere.To study the ozone concentration in the atmosphere. TECHNICAL OBJECTIVE Temperature control of the payload.Temperature control of the payload. This will be accomplished by including 2 heaters in the payload that will be controlled by the Basic Stamp Processor.

Principle of Operation OZONE SENSOR Use of an electrochemical concentration cell (ECC). 2 KI + O 3 + H 2 O  2 KOH + I 2 + O 2 3 I - + I 2  I I -

Principle of Operation (cont.) Use of an ECC inside our payload to make the ozone measurements.Use of an ECC inside our payload to make the ozone measurements. Sensor consists of a pump, two plastic bottles, and the metal structure that holds these in place.Sensor consists of a pump, two plastic bottles, and the metal structure that holds these in place. The basic principle is the following: when the ozone enters the ozone sensor that is being drawn by the pump it reacts with the cathode solution.The basic principle is the following: when the ozone enters the ozone sensor that is being drawn by the pump it reacts with the cathode solution. Iodide-iodine redox reaction which means that this chemical reaction reduces iodide to iodine.Iodide-iodine redox reaction which means that this chemical reaction reduces iodide to iodine. Current created by electrons moving from cathode to anode.Current created by electrons moving from cathode to anode. The current produced can then be used to calculate the ozone concentration in the atmosphere.The current produced can then be used to calculate the ozone concentration in the atmosphere. 2 electrons per ozone molecule.2 electrons per ozone molecule.

Principle of Operation (cont.) Ozone concentration is determined by Faraday’s law of electrolysis:Ozone concentration is determined by Faraday’s law of electrolysis: “The amount of any substance that is liberated at an electrode during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.” Source: Pinkmoney.com

Organizational Chart

MAIN SCHEDULE ActivityStartFinish Mission ObjectivesMon 2/3/03Wed 2/5/03 Project ManagementThu 2/6/03Tue 2/11/03 Payload DesignWed 2/5/03Thu 2/13/03 Science Abstract and WBSFri 2/14/03Fri 2/14/03 Payload Development PlanThu 2/13/03Tue 2/18/03 Payload Construction PlanThu 2/13/03Tue 2/18/03 Master BudgetThu 2/13/03Tue 2/18/03 Written PDRWed 2/19/03Wed 2/26/03 Preliminary Design ReviewThu 2/27/03Thu 2/27/03 Critical Design ReviewThu 3/20/03Thu 3/20/03 Flight Readiness Review (FRR)Thu 5/1/03Thu 5/1/03 Launch TripSun 5/18/03Thu 5/22/03

System Design Main System: Basic Stamp Processor Subsystems: Ozone Sensor Temperature Reader Analog-To-Digital Converter User Interface System Reset HeaterMemory Real Time Clock

System Design (cont.)

Weight Budget PartWeight (g) Ozone sensor w/battery500 g Microcontroller65 g Batteries (4-AA)105 g Real Time Clock40 g Payload “Box”100 g Total810 g Note: 4-AA batteries are included to account for “the weight” of the batteries used, but the actual batteries that will be used will be specified until the Power Weight Consumption table is done which is a TBD item in the PDR.

Data Analysis Data to be Collected: 1) The data that will be measured by the ozone sensor which will be translated into concentration of the atmosphere by means of the current generated by the ozone sensor. 2) The temperature inside the payload. 3) The time stamp generated by the Real Time Clock. All of this data will be stored on board on the Secondary Memory Storage. Data Needed: 1) GPS system data: Longitude, Latitude, and Altitude. This data will be acquired after the flight and it will be correlated to the data collected by our payload. Since the two clocks will be synchronized this will not present much difficulty

Any Questions?