PTAR Presentation Jonathan DeLaRosa, Jessica Nelson, Ivan Morin, JJ Rodenburg, & Tim Stelly Team Team Cronus Cronus
Jan 18, 2018
PTAR Presentation
Jonathan DeLaRosa, Jessica Nelson, Ivan Morin, JJ Rodenburg, &
Tim Stelly
Team CronusTeam Cronus
Introduction
Launch Date• May 20, 2013
Get to Apophis by 2014
Orbit Apophis Collect science data Send data back to
Earth to study
Propulsion
Piggyback to GEO
GEO to Apophis
Pegasus XL Atlas V Delta IV Chemical Propulsion
Low Thrust
Electric Solar Sail
Nuclear
Ion
Atlas V has a 91% launch success rate
Atlas V can take a satellite to LEO, GTO, or GEO
Chemical propulsion is a proven method and can get to Apophis faster
Spacecraft Utilities
Power Sources Computation & Data Handling
Batteries RTGs
Operating System
LinuxSolar Cells & Batteries
Fuel Cells
Windows MAC
Fully autonomous
High-level cmd, autonomous
task completion
Tele-robotic operation
Command and Control
Attitude Determination
and Control
CMGs GyrosStar Trackers
RCS ThrustersMomentum Wheels
Sensors Actuators
Solar cells are lighter and are a renewable power source
High-level command can keep the data rate lower
Star trackers are reliable, small, and lightweight
RCS thrusters will be used for station keeping
Communication
Data Rates Architecture
High data rate, high level of
information/control
Low data rate, low level of
information/control
Communicate when in range
Always in communication
Links/Relays High power, direct link
Cache/data dumps
Variable data rates can be used to stay in continuous contact, even at long ranges
Proximity Operations
Land Standoff
Land, then release
seperate transponder
Transponder part of spacecraft Use IR/RF imaging to
gather seismic information
Send equipment
down
Standoff is a lower-risk method to acquire the necessary scientific data
Spacecraft will monitor changes in the orbit of Apophis due to presence of an orbiting body
Secondary Payload - Lander
Gossamer netBarbed projectile
Robot(s)
Equipment contained inside
Torpedo
Release smaller equipment/robot
Release smaller equipment
Cloud of cameras and sensors
Release sample spikes and
sensors
Torpedo better suited for unknown composition
Equipment will take soil sample, provide secondary RF imaging, and induce a disturbance to study damping and response
Will relay data back to standoff spacecraft
Battery-powered communications and data handling
Seismic Data Collection
Remote Sensing Implanted
Impulsive Disturbances
All-in-one
Slugs
Surface Sampler
Separate Sensors
Explosives Torpedo
Ground-Penetrating
Radar
IR Spectrometer
Ground-penetrating radar will be used to study structural makeup
IR spectrometer will be used to study surface composition
Magnetic Sensing
Imaging Data
Visible RF/Radar IRLaser
Surface Camera(s) Orbiting Camera(s)
Included with seismometers
Included with impact slugs/samplers
Attached to main s/c
Separate Cameras Camera “Cloud”
Visible imaging will provide tangible data for study and publicity
Star tracker can be used for ADC and visible imaging
Ground-penetrating radar will be used to study structural makeup
IR spectrometer will be used to study surface composition
Mission DesignMission Design Piggyback to GEO Chemical Propulsion to Apophis Orbiting Apophis while
accomplishing science tasks • Using satellite as transponder• IR spectrometer for composition• Camera imaging
Elements Launch
• Atlas V Propulsion
• Chemical propulsion• Liquid propellant
Power• Solar Cells & Batteries
BTJ Triple-Junction High Efficiency SolarCells for Space Applications
(1000 W, 2.5 m2)
Elements Attitude Determination & Control
• Star Trackers and Reaction Control System (RCS) Thrusters
• Linux OS Computer Data Acquisition Payload
• Imaging Camera• IR Spectrometer• Ground-Penetrating Radar• Landing Torpedo• Communication System/ Transponder
Goodrich Star
Tracker
IR Spectrometer
Layout Structure
• Aluminum 6061-T6 Specifications
• Power= 1 kW• Volume=1 m3
• Mass= 300 kg
Advantages of Our Design High TRL for majority of components Doubling the communications system as a
transponder Using the RCS for station keeping around
Apophis instead of using main thruster Doing imaging and composition of Apophis
from orbit with cameras and spectrometer Will study effect of orbiting masses on the
orbit of Apophis
Questions?
Thanks!