Colorado Space Grant Consortium Gateway To Space ASEN 1400 / ASTR 2500 Class #21 Gateway To Space ASEN 1400 / ASTR 2500 Class #21 T-25

-Announcements -One minute Report Questions - Orbits and Mission Design – Part III - Spring 2013 Space Grant Projects -Launch is in 25 days Today:

3 Announcements… New Syllabus Rev C - Orbits Part 3 today + Spring Projects - ADCS is Thursday - Propulsion is 11/13 - Movie night + questions 11/13 > Please complete doodle poll > Only answer if you plan to attend - Mission Sim 11/ minutes beginning of class and 10 minutes end of class - Structures in between

4 Announcements… Grades will be posted today - Will include mid semester team grades > If you haven’t done this yet, please tell me why - Will include everything up to this point - Will include community service BalloonSat Supplies - Items you need? - Form core - Aluminum tape - Glue sticks

Colorado Space Grant Consortium Next Class… Guest Lecture on ADCS Next Class… Guest Lecture on ADCS

Colorado Space Grant Consortium Orbits and Mission Design – Part 3 ASEN 1400 / ASTR 2500 Class #21 Orbits and Mission Design – Part 3 ASEN 1400 / ASTR 2500 Class #21

How well do you understand Hohmann Transfers? to 2? 2 to 3? 3 to 1? 1 to 3?

Circular Orbit: For a 250 km circular Earth Orbit Orbital Velocity

Circular Orbit: For a 500 km circular Earth Orbit Orbital Velocity

Changing Orbits: How about 250 km to 500 km How would you do it?

Changing Orbits: So back to our  V’s 3) Velocity at perigee

Changing Orbits: So back to our  V’s 4) Velocity at apogee

Changing Orbits: 1) Velocity of initial orbit 2) Velocity of final orbit 3) Velocity at perigee 4) Velocity at apogee

Changing Orbits: Therefore:  V 1 is to start transfer

Changing Orbits:  V 2 is to circularize orbit

How well do you understand Hohmann Transfers? to 2? 2 to 3? 3 to 1? 1 to 3?

Circular Orbit:

Changing Orbits: Also something called “Fast Transfer” It is more direct and quicker However it takes more fuel  V 1 and  V 2 are much bigger

From Earth Orbit to the Moon: Same as changing orbits but At apogee you don’t have empty space - Instead, you have a large and massive object Gravity from this object can act as a  V against your spacecraft When going to the Moon the following could happen: 1) Gravity will cause your spacecraft to crash into the surface 2) Gravity will cause your spacecraft to zip off into space for a long time

Getting to the Moon: Gravity Assist

22 One Minute Report…

Apollo XIII:

So... One switch controls the light bulb Light bulb is on 2nd floor Can’t see it unless you go upstairs Can flip switches as many times Can go upstairs once Which switch is it? If you could go up twice, how would you do it? What does a light bulb do? Besides light? What about heat?

To the Moon for Money:

Earth to L1: Lagrangian Points are orbits about an equilibrium point There are 5 Lagrangian Points

Earth to L1:

Earth to Mars: Mars Orbit Earth Orbit Transfer Orbit Initial Orbit Final Orbit

Earth to Beyond: Say you are in a 250 km orbit... Orbital Velocity:

Earth to Beyond: Velocity on parabolic (a=  escape trajectory:

Earth to Beyond:  V needed is…

Colorado Space Grant Consortium Questions? T-25

Colorado Space Grant Consortium Space Grant Spring Projects ASEN 1400 / ASTR 2500 Class #21 Space Grant Spring Projects ASEN 1400 / ASTR 2500 Class #21

42 Spring Projects: How many of you at this moment are interested in getting involved with Space Grant during the Spring Semester?

43 Spring Projects: Three potential projects to get involved with HASPRocketSat 9 X-HED HASP and RocketSat-9 will start this semester

44 HASP: -HASP is…

45 RocketSat-9: -RocketSat-9 is…

46 All Projects… - Managed by me (good or bad) - Launch next summer (HASP late August) - Involve Space Grant paid summer travel - Will have 2 – 4 paid positions next summer - Will have volunteer or credit positions in the spring (4 to 12 hours a week) - Are stepping stones to our orbital projects

47 All Projects… - Modeled after Gateway teams, which modeled after Space Grant projects - There will be a project leader(s) and team leaders - There will be design reviews (CoDR, PDR, CDR, LRR, plus others) - There will be weekly team and exec meetings - All work will take place in Space Grant lab

48 HASP: -HASP has the most work this semester -Proposal is due DEC 14 th, RFP available now -Need to form a HASP team by NOV 13 th

49 HASP: -1 st meeting NOV 13 th 8 AM at Space Grant -Weekly meetings until proposal is submitted -Previous HASP team members are ready to help -Telecon with HASP program NOV 16 th at 9:00 AM

50 HASP: IF HASP proposal is accepted, team will begin work around 1 st week of classes in JAN IF HASP proposal isn’t accepted, team will either join the RocketSat-9 or X-HED teams or form a new team and participate in the Space Grant program called DemoSat HASP requires two trips, one to Texas in JUN/JUL and one to New Mexico for launch in AUG/SEP

51 RocketSat-9: -RocketSat-9 requires no proposal but does carry a $24K launch fee - Met with a potential company sponsor last Friday - Very interested in covering that cost plus provide mission requirements - Work this semester might include meetings with this company or identifying other companies or faculty that might be interested in this opportunity

52 RocketSat-9: -Need to have sponsor/mission/customer by end of January or project may not happen - I am optimistic we will find a way to make this long- standing program at Space Grant continue - RocketSat-9 requires two trips to Virginia in JUN and again in AUG for launch

53 X-HED: -Does not require any launch fee - Mission for X-HED is to record entire rocket flight and all events in HD and that the hardware be designed in such a way that it can be easily be refurbished for future flights - Project is WILL take place next semester - X-HED = X-HD Experiment Deck - X-HED requires two trips to Virginia in JUN and again in AUG for launch

54 Spring Projects: -How many of you now are interested in getting involved with Space Grant during the Spring Semester? - Next Steps… > Let me know if you are interested; or paper > Show up to first meeting for HASP > Start thinking about missions

Colorado Space Grant Consortium Questions?