Space Grant Symposium, Apr 2002 1

USAF Academy’s FalconSAT-2 Program“Learning Space by Doing Space”

C2C Eric HutchesonInformation Management NCO

CS-25 "Redeye"

Data Handling

Space Grant Symposium, Apr 2002 2

Introduction

FalconSat I Subsystem failure

FalconSat II Designed for greater autonomy

FalconSat I

Space Grant Symposium, Apr 2002 3

Overview

Hardware Operating System Software Tasks

Payload, Telemetry, Orbit, Download

Task Control Conclusion

Space Grant Symposium, Apr 2002 4

Hardware

Designed by Surrey Power System Intel StrongARM 1100

processor

Computerized Automotive Network (CAN) bus

Space Grant Symposium, Apr 2002 5

Operating System

BZL Cooperative multitasking

3 Part Task Design Create Process Finalize

Space Grant Symposium, Apr 2002 6

Software Tasks - Payload

Miniature Electrostatic Analyzer (MESA)

Smart Data Collection Fast/Slow/Test modes

Record and store Payload data

MESA

Space Grant Symposium, Apr 2002 7

Software Tasks - Telemetry

Housekeeping Commissioning mode

56 channels Normal operations

3 channels

Space Grant Symposium, Apr 2002 8

Software Tasks - Orbit

Two line element set NORAD

Predict start LOS, end LOS, start MESA, and end MESA

Space Grant Symposium, Apr 2002 9

Software Tasks - Download

Simplest Task Memory Management 32 bit pointers

Space Grant Symposium, Apr 2002 10

Task Control

Integration of Tasks Satellite commissioning Health Testing

Safe power down conditions

Space Grant Symposium, Apr 2002 11

Conclusion

Operational Autonomy Efficient Communications Robust Software

Back door capabilities Launch date

16 Jan 2003 STS-114