The foundation of ASTRA is our fundamental knowledge of the physics of the upper atmosphere, thermosphere and ionosphere.

With experience spanning decades and multiple disciplines, our scientific team utilizes deep understanding and expertise in many aspects of space physics. We produce new interpretations of data and model output, and new insights and discoveries for our customers.

Atmospheric Modeling

Real-Time Modeling and Forecasting A Unique Unified System for Specification of the Ionosphere & Thermosphere
Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model (TIME-GCM) First-principles full-physics global model
Proprietary Radio Raytracing Code Combined with model outputs to study radio propagation, radio system design, and data analysis.

Other modeling Resources Include:

  • International Reference Ionosphere Model (IRI)
  • Mass Spectrometer and Incoherent Scatter Model (MSIS)
  • Trajectory Analysis
  • Satellite Aerodynamics and Gas-Surface Interactions

Data Assimilation

Assimilative Mapping of Ionospheric Electrodynamics (AMIE) Deriving high latitude electrodynamic parameters through data ingestion
Ionospheric Data Assimilation Four-Dimensional Model (IDA4D) Global electron density specification using multiple diverse data sets from GPS TEC, HF radio, in-situ, GPS occultation, and UV remote sensing.
Atmospheric Density Assimilation Model (ADAM) Under Phase II SBIR development for satellite drag and orbital prediction

Data Analysis – Space and Ground Based

Electron Density Changes in distribution can delay, advance the phase, and refract (bend) radio signals, with impacts on GNSS navigation, communication, and surveillance systems.
Field Aligned Currents Improved specification and understanding of FAC improves understanding of Magnetosphere-Ionosphere coupling
GRACE/CHAMP Interpretation of satellite accelerometer data
Neutral Density Changes in thermospheric density create variable satellite drag, adversely affecting space missions
TIMED Utilizing the Global UltraViolet Imager (GUVI) onboard NASA’s TIMED satellite
Traveling Ionospheric Disturbances (TIDs) Traveling Ionospheric Disturbances are always present in the F-region ionosphere, and impact operational systems employing GPS, radar, and radio.
Contact us to utilize our expertise in space physics to understand the upper atmosphere and its systems-impacts »