Research

Jeffrey Thayer

Dr. Jeff Thayer’s research program focuses on studying the aerospace environment of our Earth’s atmosphere and geospace environment. He specializes in geophysical fluid dynamics, gas and plasma interactions, thermodynamics, and electrodynamics applied to the upper atmosphere (above 10 km altitude) and geospace. This field of research has increased over the years as our society rapidly becomes more dependent economically and socially on access to space and space assets. Understanding the upper atmosphere and geospace environment is critical for our “space” society. Dr. Thayer also specializes in active remote sensing techniques employing engineering concepts to design, develop, deploy and apply laser radars (lidars) to upper atmosphere studies and apply radar techniques to geospace studies. The active remote sensing techniques engage engineering concepts and solutions with an acute understanding of the scientific purpose. This effectively bridges and balances engineering concerns with scientific expectations.

Associated Links
http://ccar.colorado.edu/rses/index.html

George Born

The Low-Energy Astronautics Group "Project Geryon" is developing new mission designs and navigation techniques that take advantage of "low-energy" trajectories in the solar system. Much of the work is focused on the Earth-Moon system.

Associated Links
http://ccar.colorado.edu/geryon

Dennis Akos

Dr. Akos' research focuses on satellite navigation, particularly all aspects related to the receiver design/implementation. He pioneered the application of the software radio architecture to satellite navigation receiver design which has provided tremendous insight into the operational characteristics. He is the co-author of the text: A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach. His current research interest involve receiver design and testing for various GNSS, including GPS, GLONASS, Galileo, and Compass; utilizing GPS/GNSS for remote sensing; RFI/spoofing detection, localization, and mitigation algorithms for GPS/GNSS

Associated Links
http://ccar.colorado.edu/gnss/

Penina Axelrad

Dr. Axelrad's research focuses primarily on Global Navigation Satellite Systems (GNSS) and their application to positioning, attitude determination, and remote sensing. She is also interested in satellite navigation and orbit estimation more broadly, including orbit determination using optical observations of geosynchronous objects and estimation approaches for space situational awareness. In the GNSS area her group is currently working on techniques for weak signal acquisition, modeling and detection of multipath errors, and detection of atmospheric turbulence in GPS data collected from LEO occultations and ground-based receivers.

Robert Culp

Earlier work included optimal orbit maneuvers, atmospheric entry theory, perturbations, and satellites’ atmospheric drag and decay. Dr. Culp recently served on the NRC Committee for Near-Earth Object Strategies and the Saving Planet Earth Report, and was a member of the NRC ISS Meteoroid and Debris Risk Committee. He has conducted major research over the past three decades in space debris and attendant problems.

William Emery

Dr. Emery's research focuses on study of ocean surface processes such as sea surface temperature, ocean color, surface currents, coastal satellite altimetry. The development of processing software for operational weather satellites. Study of high-resolution satellite imagery for urban change detection and mapping of disaster effects. Application of high and moderate resolution satellite imagery to the study of terrestrial vegetation and its variations. Using very-high spatial resolution satellite imagery to study road surface condition changes and other urban effects.
This research group also is involved with the deployment of a variety of sensors on Unmanned Aerial Vehicles to study the Earth in particular in polar regions. In 2012 and 2013 summers they will be conducting a large study of the Marginal Ice Zone using a number of drone aircraft.

Associated Links
http://ccar.colorado.edu/colors/mcc.html
http://ccar.colorado.edu/mizopex
http://ccar.colorado.edu/dot

Delores Knipp

Space weather effects on satellite drag; geospace system science; combined use of commercial-and research-grade space-based instruments for sensing space weather; data assimilation.

Associated Links

Scott Palo

Dr. Palo's research focuses on remote sensing of the near Earth space environment, in particular the mesosphere and thermosphere, and the development of small satellite systems. Dr. Palo currently develops and deploys meteor radar systems to measure the winds in the mesosphere utilizing specular reflections from ionized meteor trails and shares space with Dr. Thayer in the Active Remote Sensing Lab (ARSenL). He is also involved with the development of pico and nanosatellites for space weather applications. Students in Dr. Palo's research group are engaged in the development of ground-based meteor radar and space hardware, analysis of radar and satellite observations and the use of atmospheric global circulation models.

Associated Links

Hanspeter Schaub

Dr. Schaub is the H. Joseph Smead Associate professor of the Aerospace Engineering Sciences department. He is an associate fellow of AIAA and member of AAS. His 13 years of professional interests are in nonlinear dynamics and control applications, with a special emphasis on astrodynamics. He performs research in spacecraft attitude and control, exploiting nonlinear dynamics of control moment gyros to avoid classical CMG singularities, adaptive control with prescribed closed-loop dynamics, as well as extensive research in near-Earth spacecraft formation flying problems. Prior to his University of Colorado appointment he spent 4 years as an assistant professor at Virginia Tech. Prior to Virginia Tech Dr. Schaub worked 4 years at the Sandia National Labs Intelligent Systems and Robotics Center (ISRC). At Sandia he worked on the dynamics, simulation (both hardware-in-the-loop and workstation based) and control of a Navy ship mounted crane control project, on the control of swarms of autonomous robotics systems, as well as the development and integration of a robotic visual servoing system based on statistical pressure snakes. He has authored over 40 peer reviewed papers, presented 66 conference papers, published a text book on analytical mechanics of space systems, and holds a patent on a noncontact position and orientation measurement system.

Associated Links
Dr. Schaub's Research page

Daniel Scheeres

Astrodynamics & Satellite Navigation

Associated Links
http://ccar.colorado.edu/scheeres/Scheeres/Research_Topics.html