slides and presentations by: david bjanes rajesh atluri shot ii pre-launch presentation
DESCRIPTION
Violet : A High-Agility Nanosatellite for Demonstrating Small Control-Moment Gyroscope Prototypes and Steering Laws. Slides and presentations by: David Bjanes Rajesh Atluri SHOT II Pre-Launch Presentation June 10-13th, 2010 Boulder, Colorado. SHOT II: Mission Overview. Payload - PowerPoint PPT PresentationTRANSCRIPT
Cornell UniversitySpace Systems Design Studio
AIAA GNC Conference - 8/11/2009
Violet: A High-Agility Nanosatellite for Demonstrating Small Control-Moment Gyroscope Prototypes and Steering Laws
Slides and presentations by: David BjanesRajesh Atluri
SHOT II Pre-Launch Presentation June 10-13th, 2010
Boulder, Colorado
SHOT II: Mission Overview
2
PayloadGPS Receiver Board
GPS Interface Board
ATmega32 Microcontroller Board with sensors to measure temperature, acceleration
GoalsCollect telemetry during flight
Log GPS data on to flash memory on the ATmega32 microcontroller board
Download data stored post-flight from flash memory
SHOT II: UN-6 Mission Relevance:
The GPS system is a critical part of the Violet mission
SHOT II payload includes components from Violet design:– Active Antenna– GPS Receiver Board– GPS Interface Board
We intend to demonstrate the abilityto gather and store GPS data during flight
3
GPS Receiver
GPS Receiver
CDH chip 1
GPS Interface
Board
Antenna Antenna
GPS Interface
Board
CDH chip 2
Violet GPS System
SHOT II: Design Details
4
Foundation
SHOT I payload with ATmega32 microcontroller
Modifications GPS Orion Receiver Board - L1 Band frequency: 1575.42 MHz - 12 Parallel Tracking Channels - Active Patch Antenna GPS Interface board - Serial Interface (RS232)
SHOT II: Compliance & Test
5
User Guide Compliance Mass: 700 grams Payload attaches to flight string through a pair of holes on the top and bottom
Test Program The satellite box was tested for structural integrity using the whip, drop, and
stairs test.
The flight payload was tested on the lab bench by running flight code for the expected duration of the launch.
SHOT II: Expected Results
6
We expect to store the following data on to the flash memory on the Microcontroller board:
• Telemetry from sensors• GPS data output by the GPS Interface Board
We expect to read this data on the flash memory using a data parser application.
Example data will be shown as part of our demo.
GPS Orion RS232 Memory Parser Data for analysis
SHOT II: Demo
7
GPS data retrieval
Previously ran flight code
Download data stored in flash memory onto PC
8
Questions?
Questions?