Mission+Concepts


 * FluxDemonSat Mission Concepts**

[|Link to Merit Review Form] http://goo.gl/4Zwcla

__Merit Review, Oct 31st__ __Feasibility Review, November 7th__ Mr. David Rush (confirmed) Mr. John Klingelhoeffer (confirmed) Mr. Perry Ballard (USAF) confirmed Michael Taylor (SpaceX), confirmed Eryn Maynard (Google) confirmed Bobby Russell (General Atomics), confirmed Dr. Chris Spraggins (CHS), confirmed Taylor Klotz (WTVM), confirmed Christian Nelson (NASA), confirmed
 * Merit Review**

Draft
 * Feasibility Review**

Nov12/Nov13 Mag data

Concepts not listed in any particular order.
 * **TumblingSat** || with antenna on each face, determines best antenna to transmit/receive signals. Can be used in combo with mag detector. Perhaps tumbling on purpose, is doesn't already tumble ||  ||
 * **SuperAttitudeSat** || self-stabilizing sat, enough control to travel across surfaces on its own. Gyroscopes can be weaker than on earth. Why/which devices on earth use gyros? Perhaps tumbling on purpose, is doesn't already tumble, in order to correct tumbling. Antennae limited in scope, radio, directional sound possibilities || Megan, John, Zhong ||
 * **PMSat** || Laser/light particle detector for microbial detection, UV-LIF assay with camera, any sort of microscopic material. 16s rRNA Need research justification and on-the-ground verification. Flip panel that faces space, then tun back to face camera that detects with UV or optical/chemical /mechanical analysis of patterns on panel, expose panel and sense material. see how clean environ is. microfluidic assays, potentially? must have ground testing component ready || Jinny, Farita ||
 * **μonSat** || detecting muons for…. (cloud chamber on earth, some sort of chamber on vehicle? see if feasible). || Jinny ||
 * **SunSat** || collecting data on solar winds (research question: measure magnetic field strength to yield data as to the presence of solar wind, other space weather events (can detect difference in changes in mag field caused by diff particles?). unique, as it is i//n situ//. can describe map with other sats. need ways to determine location based on position of surrounding landmarkers. stars, etc. needed for all sats potentially), imaging to determine changes over time and correlating to fluctuations in sun's surface activity, //Langmiur probe can be used, possibly. detecting solar flares, sunspots, etc. magnets are typically used to orient sats, and so will interfere. instead, will require alternative way to orient, such as tumbling sat. will need high magnetic cleanliness with cancelling mag fields (ensure with magnetometer), **see if has been done before with 1U cubesat package, and tumbling sat config,** || Farita, Shivani ||
 * HydrogenSat || Solar sail, Ramjet application. H present in very low concentrations in upper atmos, sensitive instruments exist, but are they sensitive enough? is the margin of error sufficiently low enough to record viable data for low concentrations of H/He. Research sat measurement of escaping gases, H and He ||  ||
 * ϒsat || detecting gamma radiation in space - aging. Radiation shielding as a way to protect electronics possible. Can an electromagnet be created to shield a radiation sensor sufficient as to not detect x particles? see context for emag shielding and cubesat size. ||  ||
 * Organism sat || most life forms will die--see those that won't. orgs that produce gas, with healthiness measured by detectable output (oxygen, gas, humidity) can be studied. it will be dark/cold/hypobaric, so extremophiles might be needed (cryophiles?), microbes. Symbiotic relationship possible--supply gas/sustenance to space colony? Panspermia hypothesis. deformation in material as sat emits vibrations.see integrity of growth medium, (biomedical: maybe growing organs/producing pharmaceuticals using chimeras with low probability of contamination? ) || Jinny ||

[|Daily Magnetic Variation, delta-B > 35nT] [|HMC2003 Magnetoresistive magnetometer] [|16-bit I2C board from Adafruit]

[|MAVEN Magnetometer] History of Fluxgates: Diagram of 1st space fluxgate magnetometer sent to the Moon in 1972 The first ring core fluxgate magnetometers used in space were in the Lunar Surface Magnetometer package left on the surface of the moon by the astronauts of Apollo 16 in April 1972 [Dyal and Gordon 1973]. There was a rapid transition in the use of the ring core during the 1970's. Today nearly all scientific vector measurements in space are made with ring core magnetometers. This is because of the low mass and simplicity of the circuitry. Acuna [1981] reported nonlinear fluxgate response when MAGSAT sensors were exposed to large, >5,000 nT, uncompensated transverse fields. Primdahl et al. [1992] further investigated this phenomena and found that a fluxgate on a spinning vehicle produced signals with magnitude ~10-4 of the applied field at the third harmonic of the spin frequency as a result of this nonlinearity. The large transverse field must be in the plane of the ring core to see the nonlinearity. The parallel core designs such as Vacquier and Foster do not exhibit this problem. To compensate for this problem Primdahl and Jensen [1982] constructed a three axis fluxgate sensor with the three feedback windings on the surface of a sphere. The magnetic cores with their drive windings resided inside the sphere. Thus the ring cores were not exposed to uncompensated transverse fields. Other investigators have used cubical configurations to achieve similar results. (taken from [] )

[|Fluxgate Magnetic Sensor system], PhD Thesis Good review of different types of magnetometers

[|MagSat Fluxgate Magnetometer] Analysis of materials chosen for the cores and overall design with space implications [|Fluxgate Magnetometer Design Peculiarities] Discussion of noise level and choice of core material --> Superalloy / Mo- Permalloy Mo Permalloy spec sheet Design and Development of a Fluxgate Magnetometer for Small Satellites in Low Earth Orbit Modern Fluxgate Magnetometer Design Includes evaluation of modern electronics to miniaturize with limitations of small coils Evaluation of a COTS Fluxgate Magnetometer for CubeSat Space Magnetometry MAGSAT

[|Magnetic Detection patents] [|New fluxgate magnetometer technology] -- integrated PCB, space applications

[|Choice of magnetic core materials] [|Thesis on microsensor fluxgate magnetometers] == good theory description and material properties for cores + equations [|Modern Fluxgate Design] [|Design of most sensitive low noise fluxgate] [|Fluxgate explained] -- UK article on fluxgate concepts [|Amorphous cores] (2002)

OTHER CUBESAT MAG MISSIONS [|UColorado Hermes] -- uses a Honeywell HMC2003 [|CINEMA, Cubesat Initiative launch, UC Berkeley] -- magnetometer on a boom, 3U

PAPERS

[|Review of Cubesat Capabilities] (2012)

[|Gravity Grandient 3U cubesat analysis (paper by senior at CalPoly)] [|3U cubesat deployable structure for gravity gradient (good for robotics deployments)] [|Program to simulate B-field and gravity gradient boom on Cubesat] [|Gravity gradient modeling for a Cubesat] [|Scissor deployment of a split cube] [|Attitude Control of Cubesats in LEO] [|DODGE -- mission used gravity gradient to make magnetic field images and take Earth images] [|Cubesat in LEO Design] [|Analysis of Cubesat subsystems] [|QuakeSat Lessons Learned] [|ESA Cubesats] [|List of Cubesats]

[|PdMOSFET]

VIDEOS [|NASA Edge video about Cubesat Initiative]