Last Words on CETI and some Space Travel Basics

HNRS 228w/Prof. Geller

What I Will Cover

Final words about CETISpace TravelSpace EnvironmentSpaceflight ProjectsSpaceflight Operations

A Cartoon about CETI

What does a telescope do?

Collect electromagnetic waves Collecting ability proportional to the

square of the diameter of the objectiveResolve electromagnetic sources

Related to the atmosphere, wavelength and curvature of the objective

Magnify surfaces of planets and the Moon Magnification only of Moon, Sun and planets

Looking Beyond the Eyes

Optical Telescopes

Reflector

Refractor

Different Views of Sun

                                                 

Sun in Hydrogen-alpha Sun in X-ray

Radio Astronomy Basics

A Little More Detail

Jansky’s Original Radiotelescope

Grote Reber’s Telescope

170 foot Diameter Radio-telescope at Green Bank, WV

The 100-meter Green Bank Telescope

Even Bigger than you Think

Jupiter in Radio

Saturn in Radio

                                                                                                                                                        

                                                       

3C296 Radio/Optical Composite

A Vision for George Mason (based upon Univ. Indianapolis)

Small Radio Telescope Justification

Radio science observations in the L-band L-band lies in the 1400-1427 MHz region

of the electromagnetic spectrum detection of what astronomers call the

21-cm line of hydrogenthis is a portion of the hydrogen spectrum, in

the radio region of the electromagnetic spectrum, which is generated by the neutral hydrogen clouds in the interstellar medium

Small Radio Telescope Justification

Observations in C-band, which is 4313-4338 MHz and 3788-3813 MHz Radio science observations in the C-

band allow for the radio emission examination of the moon, which acts as a body at a temperature of 200 K.

Students will be able to scan the moon, and detect the estimated 6000 joules of energy from the lunar surface.

GMU SRT Background

Funding National Science Foundation

education portion of grant won by Dr. Rita Sambruna

Order History ordered first week of June 2002

stated 12 week delivery time

received 15 October 2002damaged antenna

GMU SRT Background Part II

Order History boxes damaged FedEx insurance inspector called and

visited to assess damage - refused claim replacement parts to be shipped by

vendorBase assembled on roof

1 November 2002Remaining electronics and

replacement antenna parts received 30 January 2003

Did You Say Fragile?

Picking Up the Pieces on the Roof

Whistle While You Work

Tolerance

Cleanup On The Roof

The Base Of SRT

Servo Motors Attachment

Servos with Ring Assembly

Dish/Receiver Assembly

Readying for Final Mechanical Assembly

From Mechanical to Electrical

Assembled and Ready to Test

Sample Data

Even Smaller - Radio Jove

Small Radio Science Demonstration Projects

Undergraduate research Steve Richardson

web site built with some results from data acquired using U of Indianapolis

• http://physics.gmu.edu/~arichar6/radio/index.html

prepared presentation for GMU “innovations” fair

prepared presentation for CPAC meeting at Bucknell University

Smoothing Data

Visualizing the Data

Colorizing the Data

Must Deal With Noise

Worldwide Noise Sources

Family Portrait (2001 conference)

Radio Astronomy atGeorge Mason University

Looking To The Future

Future GMU Observatory

Space Environment

Solar SystemReference SystemGravity and MechanicsTrajectoriesPlanetary OrbitsElectromagnetics

Solar System Considerations

Distance From Sun

Energy, temperature, condensation of matter

Hostile Environment Radiation (gamma

ray) Radiation (x-ray) Radiation (UV)

Coordinate Reference Systems

GeographicCelestialPrecession

Gravity and Mechanics

Orbits Kepler Newton

Orbital Transfers

Planets and Gravity

Flight Projects

Mission InceptionExperimentsSpacecraft ClassificationTelecomOnboard SystemsScience InstrumentsNavigation

Mission Inception

Instruments

Telecommunications

Onboard Systems

Operations

LaunchCruiseEncounterExtended OperationsDeep Space Network

Launch

Cruise

Encounter

Deep Space Network