8/6(Sun) 18:30-20:00 @ YukiHouse
Present: Yuki, Chris, Loren, Marty, Anna


* Loren said the observatory should have more specific scientific goals.
 - I (Yuki) feel that the goal of the observatory on the Moon is to do
observations not possible from Earth or its orbit 20 years from now.  For
example, radio/microwave observation may become impossible from anywhere
near Earth (maybe the Moon's farside will be the only feasible
place).  Same with infrared.  Also, Vit pointed out that keeping the
instruments cool in Earth's orbit is challenging.  At higher frequencies,
stability is important (Can somebody find out the stability of telescopes
on high Earth orbit?).  By making possible what's never been possible
before, we'll discover things we don't even know about yet.
 - So, maybe the specific scientific goals come after these
considerations (of advantages on the Moon).  Personally, I'd like the
scientific goals to be:
	* To find clues about the origin of the universe,
	* To help with the search of the quantum theory of gravity, or
	    verify its predictions.


* Yuki thought the questions outlined in the International Space
University Design Project for Lunar Farside Observatory
(http://www-sn.jsc.nasa.gov/PlanetaryMissions/EXLibrary/DOCS/EIC039.HTML)
are good:

 a. What are the major questions stimulating research in astronomy and
	astrophysics today [or 20 years from now]?
 b. What measurements are needed to address those questions?
 c. What would be the capabilities of instruments required to make the
	needed measurements?
 d. Does the environment of the lunar surface offer opportunities for
	these observations that cannot be done (or done as well) from
	Earth or from orbit?


* Marty brought his papers on topography of polar regions:
 - Topography of the Lunar Poles from Radar Interferometry: A Survey of
	Cold Trap Locations, 1999/6
 - Digital elevatin Models of the Moon from Earth-Based Radar
	Interferometry, 2000/3

* Chris reported his findings about transportation systems:
 - command module (E<->M 5people, 17tons, 16kW, 4.5*3.8m, $10G)
 - service module

* Anna reported her findings about solar cells.  She found relativity new
	manufacturing technology in Australia and showed us pictures.

* Yuki mentioned that books for space mission analysis/design will be
	useful in doing basic designs of systems and for basic information
	about such things as Lunar environment.

* Yuki reported that he's trying to decide what type of telescope will
	really be most benefial and demanding 20 years from now.  If we
	trust the ISU Design Project's result, optical interferometer may
	be our choice...

  Marty said we should check out decadal reports:

-Despite Chris's (correct) belief that science is often not the major
  driver in selecting space-based missions, nevertheless a good science
  rationale is still necessary to get a project started.
-To see what the science community is thinking, see, for example
  Table 1.1 (and as much as you want to read of the rest) at:
        http://books.nap.edu/books/0309070317/html/19.html
  (National Academy of Sciences, not the IAU as I said yesterday. There is
  IAU activity but it is primarily centered around radio astronomy & VLBI)
-A parallel thread in the NAS can be found at
       http://nationalacademies.org/bpa/projects/cpu/plan.html
  Note in particular the part on "(3) understanding fundamental physics
  by using space and the cosmos as a laboratory full of experiments that
  could never be implemented on the Earth. "
- Also see:
     NASA Origins Roadmap:
        http://origins.jpl.nasa.gov/library/scienceplan/scienceidx.html
     NASA  Structure and Evolution of the Universe Roadmap:
        http://universe.gsfc.nasa.gov/roadmap.html


* Yuki thought we should make an organization chart of our project so that
every one of us have a good picture about how each part fits into the
whole project.
 - Please look at the chart at:
	http://www.its.caltech.edu/~yukimoon/moon/MM.html
   The bottom parts with ?-marks are things for us to work on.
   Please tell me any additions to the chart, especially in the branch
	you're specialized in.
 - We agreed that many aspects of our project are coupled (inter-related),
	so I'll add arrows on the chart to indicate this.
 - We'll make the chart more detailed as we go, but at this stage let's
	focus on overall picture.


* Chris said we'll make spreadsheets for our designs.
	For example, telescope (mass, volume, dimension, power)

* Chris gave an overview of how space mission design flows:
	1. Objectives
		- wavelength
		- data type
		- performance
	2. Design
	3. Constraints (30000kg, 8.8m)
		-> performance (after constraints)
	-> launcher, lunar ascent/descent vehicle
	-> surface base (50kW)


* I'm sorry I was too busy to be prepared for the meeting last time.
  To make the most out of our meetings, let's review what they're for.
  Here's what I feel meetings are for:
	To share ideas, keep everyone's focus, decide something together,
	work on areas not worked by individuals, share resources, voice
	ideas, ask questions, ...


* With that, our next meeting is tomorrow!
  8/19 (Sat) 20:30 @ YukiHouse

	1. Suggest changes/additions to our organization chart.
	2. Try to decide the type of telescope (what spectral range?).
	3. Share our findings.
	4. Decide what people will investigate while they're away.