2010 – 2011, M.S., Space Architecture (Summa Cum Laude), University of Houston
Thesis: Lunar Radio Telescope and Future Astronomy Analysis on the Moon’s Far Side
1. Cassini Observations of Jupiter and Saturn
The multi-filter images from the Imaging Science Subsystem (ISS) on board Cassini are utilized to explore the vortex behavior on Saturn during the time period of 2004-2011 (starting in northern winter, moving through equinox, into northern spring). Our exploration is concentrated in the northern hemisphere, which is a follow-up study of the vortex survey in the southern hemisphere (Vasavada et al., 2006). We mainly utilize ISS images from two filters (i.e., MT3 and CB2), which probe the pressure levels around the tropopause and upper troposphere, respectively. Our exploration based on the maps in 2005 and 2008 suggests that there are significantly different vortex behaviors (i.e., size, spatial distribution, and vertical structure) between the two hemispheres. We are exploring more global maps after Saturn’s spring equinox (August, 2009) to see if there are seasonal effects on the vortex behavior. Comparisons between Saturn and Jupiter can then be drawn, and models can be extended to exoplanet research.
2. Io - Proposal
Io is the most geologically dynamic body in the Solar System. Its surface is covered with active volcanoes (the largest in the Solar System) with plume heights in excess of 400 km above Io's surface [e.g. 1]. High temperature lavas on Io resemble Archaean-aged komatiite lavas on Earth , and eruptions on Io are similar in scale to those of ancient terrestrial, Martian and Venusian flood basalts . Volcanism is a key geological process, and Ionian volcanism could be a potential laboratory for investigating early volcanic episodes and evolution on terrestrial planets.
Based on the most recent planetary science decadal survey  and New Opportunities in Solar System Exploration (NOSSE) report , an Io Observer mission was included in the 2009 New Frontiers Announcement of Opportunity . The decadal survey called for the Io Observer to focus on determining Io’s internal structure and to investigate the mechanisms contributing to its extensive volcanic activity. The recommended mission payload consisted of a narrow angle imager, thermal mapper, ion and neutral mass spectrometer, and a flux gate magnetometer. Here we propose an additional instrument that would enhance our understanding of Io—a dust analyzer—which would be capable of determining the composition of dust grains in Io's atmosphere and volcanic plumes, providing direct and indirect analysis of Io's volcanic activity as well as insights into Io's formation, interior and surface structure, and atmosphere.
3. Evapotranspiration estimation of almond and pistachio orchards using the MODIS/ASTER Airborne Simulator (MASTER)
The MODIS/ASTER Airborne Simulator (MASTER) was used to estimate the evapotranspiration (ET) of almond and pistachio orchards in southern California using a variety of remote sensing models including the Vegetation Index Trapezoid (VIT) method, and SEBAL and METRIC ET models. Additional inputs were acquired using the California Irrigation Management Information System (CIMIS) online weather station data for potential evapotranspiration calculations and leaf area index (LAI) data from hemispherical photography. Comparisons were made to both the CIMIS potential and reference ET, field data of crop water stress, soil moisture, the VIT method, and between the two different ET models SEBAL and METRIC. Differences in ET between the two models were minimal with a strong linear relationship. The ET results suggest little water stress in the almond and pistachio crops one to four days since watered. However, calculations using the measured data with the Thornthwaite potential ET equations and IPCC local climate change models suggest that the same amount of irrigation water would maintain a ~75% of current crop area.
JPL – Planetary Science Summer School (PSSS), Team X, May 2011 – June 2011
*Io orbiter mission proposal – Structures and Science Lead – Atmosphere and Magnetosphere
University of Houston – Department of Geoscience, Research Assistant, 2012 - Present
*Researching vortex structure and convection storms on Saturn using Matlab and IDL (outlined above)
Boeing - Research Assistant, 2010-2011
*Conducting research with Boeing on Martian lander designs and SEP vehicle usage.
Houston Museum of Natural Science - Research Assistant, 2010-2011
*Design of lunar habitat and structures using 3D Studio Max
NASA/NSERC – Research Assistant, June 2011- August 2011
*Worked with airborne remote sensing equipment on board NASA’s DC-8, and other satellites. Thermal Infrared (TIR) calibration of various data sets.
Teaching Assistant - AST 105: General Astronomy Spring/Fall 2009
ACADEMIC AWARDS AND HONORS
Freshman and Sophomore Academic Scholarship – Stephen F. Austin State University
Master’s of Science, Space Architecture – Summa Cum Laude – University of Houston
Trammell, H.J., Seasonal Changes in Vortex Behavior on Saturn, Division of Planetary Scinece (DPS), American Astronomical Society (AAS), October 18th, 2012, Reno, NV, USA.
Trammell, H.J., Thermal Infrared Calibration and Systems Analysis, NASA’s SARP, July 2011. Irvine, CA, USA.
Trammell, H.J., Lunar Radio Astronomy, 62nd International Astronautical Congress, Oct. 2011. Cape Town, South Africa.
Trammell, H.J., Thermal Infrared Calibration and Satellite Systems Analysis, Stephen F. Austin State University, Dec 2011. Nacogdoches, TX, USA.
Li, L., K. H. Baines, M. A. Smith, R. A. West, S. Pérez-Hoyos, H. J. Trammell, A. Simon-Miller, B. Conrath, P. J. Gierasch, G. S. Orton, C. A. Nixon, G. Filacchione, P. M. Fry, and T. W. Momary. Emitted power of Jupiter based on Cassini CIRS and VIMS observations. J. Geophys. Res., doi:10.1029/2012JE004191, 2012. In press.
Kefauver, S.C., Davey, S., Furey, B., Gartner, A., Kurzweil, D., Siebach, K., Slawsky, L., Snyder, E., Trammell, H.J., Young, J., Ustin, S. Estimation of evapotranspiration in almond and pistachio orchards using the MODIS/ASTER Airborne Simulator (MASTER). Photogrammetric Engineering and Remote Sensing. 2012. Under Review.
Trammell, H.J. Feasibility Study of Radio Telescope Array and Future Astronomy Analysis on the Moon’s Far Side. 2011. SARA Journal, Oct/Nov 2011 pp. 14-21.
Registering is the only way of posting vacancies and obtaining contact details of candidates in our CV database.
All it takes is a few minutes and a credit card (Visa or American Express). To sign-up to this service, simply click on the Register link and fill in the form. You will then have instant access to our system after on-line payment where you will be able to complete the transaction in either US Dollars, UK Pounds or Euros.
All online credit/debit card transitions are handled through our secure third party payment processors at WorldPay. Worldpay are part of The Royal Bank of Scotland Group, the 5th biggest banking group in the world, WorldPay payment solutions are trusted by thousands of businesses, big and small worldwide.
Pricing starts at €450 (approx £400 or US$500 - use the convert tool for an exact conversion) for one month unlimited job postings and unlimited CV database access (for one user), with package discounts available if you have more permanent recruiting needs. For example, a Gold subscription will give you unlimited jobs posting and unlimited CV database access for one year at just over €250 per month!
2020 Pricing Structure (excluding VAT):
|1 month - Discovery||450 euros||convert|
|3 months - Bronze||1150 euros||convert|
|6 months - Silver||1950 euros||convert|
|12 months - Gold||3200 euros||convert|
If online payment is not convenient, give us a call at +33(0)622757477 or send us an email at email@example.com. We will set up an account for you and invoice you. Note that you can also pay through PayPal.
Please note that the posting of academic positions is free of charge. All you need to do is email us your job description and we will post it for you.
Spacelinks is based in France so the following European Union regulations regarding electronic commerce apply:
- if your business is located outside the EU, VAT does not apply to you
- if your business is located in France, you will be charged a 20% VAT
- if your business is located in the EU and you don't have a valid VAT registration number, you will be charged a 20% VAT
- if your business is located in the EU and you do have a valid VAT registration number, you won't be charged VAT provided you give us your VAT number (mandatory for invoicing)
For sales enquiries and general information, you can call us on +33(0)622757477.
Support is available Mon-Fri on +33(0)622757477 or via email. Out-of-hours support is provided only via email.
Please also note that we are located in France. Our normal office hours are 09:00 to 18:00 Monday to Friday. France timezone is GMT+1.
We are very serious about our job seekers privacy so only legitimate recruiters and employers are eligible for a recruiter account. All subscriptions requests will be manually approved and recruiter accounts constantly monitored. Users who enter inaccurate or incomplete information will not gain access to post jobs or search resumes. Sharing of login details with a third party will result in the suspension of the recruiter's account with no subscription refund.
To ensure you are approved, please include the following on your application:
* The website address of your Company. Under construction websites will be rejected.
* Email - Must end in @yourcompany.com. Applications using free email accounts such as Hotmail, Yahoo or Gmail will be rejected.
Individual exceptions can be made on a case by case basis by emailing firstname.lastname@example.org. Accounts found not to be in compliance will be deleted.