Walter Scott, Jr. College of Engineering

Graduate Exam Abstract

Jun Wang
Ph.D. Preliminary
Aug 23, 2016, 1:00 pm - 3:00 pm
ECE conference room C101 B
SPACED-RECEIVER TECHNIQUE FOR IONOSPHERIC IRREGULARITY DRIFT VELOCITY AND HEIGHT ESTIMATION BASED ON HIGH-LATITUDE GNSS SCINTILLATION
Abstract: The conventional spaced-receiver
approach uses amplitude scintillations
to estimate equatorial ionospheric
irregularity drift velocities. This
approach is less applicable at high
latitudes where there is a lack of
substantial amplitude scintillations.
This proposal presents a method to
estimate ionosphere irregularity
horizontal drift velocities based on
GNSS signal carrier phase
measurements. After applying an
adaptive periodogram technique,
cross correlation in the time-
frequency domain produces time lag
information of propagating radio
signals through the same ionospheric
structure. Three velocity models are
implemented to target specific
irregularity shapes, including the point
velocity model, the front velocity
model, and the anisotropy model. The
irregularity height can also be inferred
from the anisotropy model. The time
lag information are combined these
parameters to infer ionospheric
irregularity horizontal drift velocity.
This proposal presents the
methodology and demonstrates its
feasibility using data collected by a
GNSS receiver-array at Gakona,
Alaska, and a more recent
establishment at Fairbanks, Alaska
with other in-situ ionosphere
monitoring instruments such as an all-
sky imager and an incoherent scatter
radar.

J. Wang, Y. Morton, J. Spaleta, and W. Bristow, "Spatial Characterization of High Latitude Ionosphere Scintillation Using An Array of Software Receiver Measurements," Proc. ION GNSS+ 2014, Tampa, FL, September 2014.

J. Wang, Y. Morton, "Spaced Receiver Array for Ionospheric Irregularity Drift Velocity Estimation Using Multi-band GNSS Signals," Proc. ION GNSS+ 2015, Tampa, FL, September 2015.

J. Wang, Y. Morton, "High-Latitude Ionospheric Irregularity Drift Velocity Estimation Using Spaced GPS Receiver Carrier Phase Time-Frequency Analysis," Geoscience and Remote Sensing, IEEE Transactions on, vol.53, no.11, pp.6099-6113, 2015, doi:10.1109/TGRS.2015.2432014.

J. Wang, Y. Morton, J. Spaleta, and W. Bristow, "A Comparative Study of Ionospheric Irregularity Drift Velocity using a GNSS Receiver Array and SuperDARN at High Latitude," Proc. ION ITM 2016, Monterey, CA, January 2016.
Adviser: Jade Morton
Co-Adviser: N/A
Non-ECE Member: Olivier Pinaud, Math
Member 3: Margaret Cheney, ECE & Math
Addional Members: Charles Rino, ECE
Publications:
J. Wang, Y. Morton, J. Spaleta, and W. Bristow, "Spatial Characterization of High Latitude Ionosphere Scintillation Using An Array of Software Receiver Measurements," Proc. ION GNSS+ 2014, Tampa, FL, September 2014.

J. Wang, Y. Morton, "Spaced Receiver Array for Ionospheric Irregularity Drift Velocity Estimation Using Multi-band GNSS Signals," Proc. ION GNSS+ 2015, Tampa, FL, September 2015.

J. Wang, Y. Morton, "High-Latitude Ionospheric Irregularity Drift Velocity Estimation Using Spaced GPS Receiver Carrier Phase Time-Frequency Analysis," Geoscience and Remote Sensing, IEEE Transactions on, vol.53, no.11, pp.6099-6113, 2015, doi:10.1109/TGRS.2015.2432014.

J. Wang, Y. Morton, J. Spaleta, and W. Bristow, "A Comparative Study of Ionospheric Irregularity Drift Velocity using a GNSS Receiver Array and SuperDARN at High Latitude," Proc. ION ITM 2016, Monterey, CA, January 2016.
Program of Study:
ECE514
ECE581A4
ECE581A6
ECE651
ECE795
ECE799
MATH618
GSTR600