Abstract
We demonstrate scintillation analysis from a network of geodetic Global
Positioning System (GPS) receivers with 1 Hz data cadence. We introduce
proxy phase ($\sigma_{TEC}$) and amplitude
($SNR_4$) scintillation indices, and validate them against rate of
change of TEC index (ROTI), and $S_4$. Additionally, we validate
scintillation observations against a CASES scintillation receiver. We
develop receiver dependent scintillation event thresholding by virtue of
hardware dependent noise variance. We analyze six-days adjacent to the
7-8 September 2017 geomagnetic storm, using 169 receivers covering
magnetic latitudes between 15$^\circ$ and
65$^\circ$ in the American longitude sector. We
leverage the available spatial sampling coverage to construct 2D maps of
scintillation, and present episodic evolution of scintillation
intensifications during the storm. We show that low-latitude and
high-latitude scintillation morphology match well established
scintillation climatology patterns. At mid-latitudes, spatiotemporal
evolution of scintillation partially agrees with known scintillation
patterns. Additionally, the results reveal previously undocumented
mid-latitude scintillation producing structures. The results provide
unprecedented view into spatiotemporal development of
scintillation-producing plasma irregularities, and provide a resource to
further exploit scintillation evolution at large spatial scales.