| Date Posted |
Project |
| 2012-01-31 13:01:20 |
- (Earth Science - Biospheric Science)
This project explores an inverse modeling methodology using a biophysical model forced by observed satellite and climate data to quantify the irrigation water demand in semi-arid areas. We constrain the carbon and water cycles modeled under both equilibrium, balance between vegetation density and prevailing local climate, and non-equilibrium, water added through irrigation, conditions. We postulate that the degree to which irrigated dry lands vary from equilibrium climate conditions is related to the amount of irrigation water used. The amount of water required over and above precipitation, if any, is considered as the minimum physiological water requirement.
The method estimates both the minimum physiological amount of water required to sustain unstressed photosynthetic production for crops and the total water used for irrigation including agricultural efficiencies and losses.
To calibrate and validate the approach, we need physiological parameters to characterize the different (major) crops.
The student will work with the mentor to do literature search and web search for such parameters and in present them in a table form assimilable by the model. The student will also be involved in the comparison of the model results with observations.
The position requires skill in web research [basically Google] and a lot of organization.
The student is expected to develop a multi-dimensional table containing information about the geographic region, the crop type, the crop seeding and harvesting period s and other parameters characterizing the crop. The student will also develop and present a poster describing his/her work at the end of the internship program.
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| 2012-01-31 12:59:50 |
- (Space Science (Astronomy) - Planetary Science-Geodynamics)
- (Space Science (Astronomy) - Astrophysics-Exoplanets and Debris Disks)
Tidal heating is a universal phenomenon in space,
and is the cause of the extremely high rate of volcanism on Jupiter’s
moon Io. Meanwhile, the number of known extrasolar planets is rapidly
increasing, and the size of planets discovered now spans from gas
giants larger than Jupiter down to rocky bodies as small as the Earth.
The tidal heating of Io is caused by a particular orbital arrangement
in the moon system of Jupiter, and it is possible that known
exoplanets, or exoplanet candidates, may experience similar conditions
as Io, and thus may experience extreme tidal heating. This project
would seek to search among recently discovered exoplanets and
exoplanet candidates for cases where tidal heating may be strong, and
if so, to explore what level of heating and subsequent volcanism may
result on those worlds.
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| 2012-01-31 11:59:45 |
- (Space Science (Astronomy) - Heliophysics-Magnetospheric Physics)
- (Space Science (Astronomy) - Heliophysics-Solar Wind and Magnetosphere Physics)
The Virtual Wave Observatory (http://vwo.nasa.gov) enables scientists to search and compare wave data from several Heliophysics* missions. This project will involve analysis of data from multiple spacecraft to study wave processes in the magnetosphere, processes that require these multiple viewpoints in order to understand the fundamental behavior taking place. To enable a uniform method of searching for data from among many different space and ground-based observatories there needs to be a standard format for describing these data. This project may also involve extracting information from other sources describing the wave data produced by these observatories and creating a set of metadata descriptions in an XML format conforming to the latest accepted standards used in the Heliophysics Virtual Observatory community. *Heliophysics- the study of particles, fields, waves and their interaction in the Solar System's space plasma environment.
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| 2012-01-31 08:29:05 |
- (Engineering - Aerospace-Flight Dynamics)
- (Engineering - Electrical/Electronics-Control Systems and Dynamics)
The Space Technology 5 mission consisted of 3 spinning spacecraft in a formation measuring changes in the Earth's magnetic field over short time intervals. With assistance of their mentor, students will put together a spacecraft dynamics simulator which will model spacecraft attitude (orientation), rate, orbit, magnetic field, and sensors. The results will then be compared to actual performance of the spacecraft.
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| 2012-01-31 08:19:03 |
- (Business - Management/Administration)
- (Business - Economics)
To assist the Flight Project's Assistant Director with numerous logistics tasks as the Flight Projects Directorate is getting ready to break ground on its new building. Student required to have a basic understanding of word and excel and be willing to move around our current facilities to compile Directorate housing issue data.
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| 2012-01-30 09:14:53 |
- (Space Science (Astronomy) - Heliophysics-Space Weather)
- (Space Science (Astronomy) - Heliophysics-Magnetospheric Physics)
The interaction of the solar wind with the Earth's intrinsic magnetic field carves out a region of space known as the magnetosphere. Within the magnetopshere there are several subregions: the radiation belts, plasmasheet, ring current, and ionosphere. These regions taken together constitute the near earth space environment. We have developed several physics based models to describe this interaction, but much work remains to validated them. Model validation is essential for quantifying how well the model replicates the true nature of the region being studied, determining the model's predictive capabilities, and identifying what are the most important processes driving the system. The selected candidate for this project would combine model output with data from satellites, radar, or ground based magnetometers in order to carry out model validation. He or she would write the analysis scripts and create scientific visualizations illustrating the comparisons. An ideal candidate would have had at least a high school physics class and some programing experience with IDL, Python, Perl, or similar language. However, these are not requirements, and an interested student could learn these skills as part of their project.
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| 2012-01-27 17:19:50 |
- (Engineering)
- (Instrument Science)
The student intern will join an engineering team to assist with instrument and component level optical testing of the Ocean Radiometer for Carbon Assessment engineering development unit. This instrument is currently being developed to support future earth science data collection. The prototype unit will be undergoing testing this summer consisting of spectral, polarization, and stray light characterization. Both the instrument as a whole and individual optical components are expected to undergo various tests this summer.
The student will work under the supervision of a mentor. Work will require hands on participation in an optical laboratory. This will involve learning the operation and use of commercial and custom measuring instruments such as spectrometers, radiometers, and polarimeters under the supervision of a mentor. Participation in system level tests will be as part of a larger team of 5 - 6 optical engineers.
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| 2012-01-27 12:30:02 |
- (Space Science (Astronomy) - Heliophysics-Ionospheric Response to Solar Inputs)
- (Space Science (Astronomy) - Heliophysics-Solar Wind and Magnetosphere Physics)
The ionosphere and magnetosphere are integral parts of the same plasma-dynamical system that is affected by changing solar-wind conditions. This project attempts to determine if solar-wind drivers can directly modify the high-latitude topside ionosphere and, if so, to determine the quantitative linkage. The work will involve the analysis of data from satellites in the ionosphere and/or the solar wind. The former involves radio sounders used to determine ionospheric electron-density profiles; the latter involves extracting specific physical parameters from solar-wind data. Case studies involving both quiet and disturbed geomagnetic conditions will be investigated.
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| 2012-01-27 11:03:41 |
- (Space Science (Astronomy) - Astrophysics-Gravitational Wave Astrophysics and Black Hole Theory)
- (Engineering - Detectors and Sensors-Active (Lasers))
Lasers are an essential component of many precision measurement methods, and it is often necessary to control the wavelength or frequency with high precision. Any control method needs a frequency reference, and we are investigating optical fiber bragg gratings as a possible alternative to traditional frequency references. These optical fiber-based gratings are the size of a human hair and have a number of properties that make them well suited for spaceflight applications. This project will involve assisting in experiments to investigate the properties of these gratings as references.
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| 2012-01-25 14:22:38 |
- (Communications)
- (Communications - Public)
National Space Club Scholar – Communications and Public Engagement Project
Summer 2012
Selected candidates will work in the midst of the dynamic environment within NASA Goddard’s Office of Communications. The office is responsible for a wide range of activities including media relations, multimedia and television, social media, and all activities that involve NASA Goddard Space Flight Center’s interactions and engagement with the public.
Candidates should have a background or interest in communications, public relations, journalism, writing or marketing. Candidates will conduct and be exposed to a diverse set of communications and public engagement efforts, including writing stories, developing web features, creating content for social media sites, assisting with special events and activities, including those events specifically designed for Goddard summer interns.
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