Can-SatMidterm Design ReviewMarch 8, 2002The Department of Aerospace Engineering and Engineering MechanicsThe University of Texas at AustinAbstractIndex of TablesIndex of Figures1.0 Introduction1.2.1 University of Texas Satellite Design Laboratory (UTSDL)1.2.2 Earth-Orbiting ExperimentsGet-Away SpecialCube-Sat1.2.3 Can-Sat2.0 Background Theory3.0 Current Progress and Future GoalsMaterialCurrent DesignOther Considerations4.0 Cost AnalysisTable 4.1 Cost AnalysisItemCostTotal5.0 Project Schedule6.0 Conclusions7.0 ReferencesAppendixCM8870 DTMF ReceiverMX614 ModemLM135 Temperature SensorMPX4115A Pressure SensorCan-SatMidterm Design ReviewMarch 8, 2002The Department of Aerospace Engineering and Engineering MechanicsThe University of Texas at Austin1Austin, Texas 78712Team CanSatASE 463QUniversity of Texas at AustinMarch 8, 2002Dear Dr. Stearman,The following paper is the midterm report for our CanSat project. Our main goal is to create a pico-satellite the size of a 12 ounce coke can with transmitting and receiving capabilities. Our team has broken down our objectives into three main systems for our satellite: structure, data telemetry, and sensors. The work we have completed thus far in each of these subsystems is thoroughly discussed here, as well as the work intended to be completed in the future. If you have any questions regarding this report or the CanSat project in general, please feel free to contact us in WRW 407, or at our individual email addresses listed below.Sincerely,David [email protected] [email protected] Stewart [email protected] report summarizes the progress of the Can-Sat project, as an initial satellite design initiative at The University of Texas Satellite Design Lab (UTSDL). The main objective of this project is to demonstrate that small, inexpensive satellites can be built, tested, and launched in the span of a year. A major obstacle in designing satellite missions is the ability to implement a reliable, inexpensive data telemetry system for control and data relay communications. This is mainly due to the fact that aerospace engineering undergraduate students are generally not adequately trained for the design of digital packet communication systems. In order to allow for the establishment of an ongoing satellite design program at The University of Texas, the main goal of this project is to develop and document a small, inexpensive satellite data telemetry system that future groups can incorporate in improved satellite designs. This report summarizes the details of that design.3AcknowledgmentsThe CanSat team would like to acknowledge the following people for their help with our project. - Dr. Noel Clemens- Dr. Takuji Ebinuma- Dr. E. Glenn Lightsey- Dr. Ronald O. Stearman 4Table of ContentsIndex of Tables...................................................................................................................5Index of Figures.................................................................................................................61.0 Introduction..................................................................................................................71.1 Problem Statement.....................................................................................................71.2 Project Background...................................................................................................71.3 Objectives..........................................................................................................101.4 Previous Missions....................................................................................................101.5 Can-Sat Group Task Assignments............................................................................112.0 Background Theory...................................................................................................132.2 Communication System Design..............................................................................142.3 Amateur Radio Protocol..........................................................................................152.4 Signal Structure.......................................................................................................15Analog vs. Digital Sensor Theory...................................................................................163.0 Current Progress and Future Goals.........................................................................173.1 Circuit Design..........................................................................................................173.2 Sensor Testing..........................................................................................................173.3 Structural Design.....................................................................................................17Requirements.................................................................................................................17Material..........................................................................................................................18Current Design...............................................................................................................18Other Considerations.....................................................................................................20Antenna Choices..............................................................................................................214.0 Cost Analysis..............................................................................................................225.0 Project Schedule.........................................................................................................236.0 Conclusions.................................................................................................................247.0 References...................................................................................................................25Appendix...........................................................................................................................26iIndex of TablesTable 1: Communications Summary………………………………………………….11Table 2: Power Requirements………………………………………………..……….15Table 3: Comparison of Commonly Used Alloys…………………………………….20Table 4: Temperature