972 citations · 2.3k across the 36 of their papers we have counts for
5 papers · 2 filters
Climatology of Mid-latitude Ionospheric Disturbances from the Very Large Array Low-frequency Sky Survey
J. F. Helmboldt, W. M. Lane, W. D. Cotton
The results of a climatological study of ionospheric disturbances derived from observations of cosmic sources from the Very Large Array (VLA) Low-frequency Sky Survey (VLSS) are pr…
Insights into the nature of northwest-to-southeast aligned ionospheric wavefronts from contemporaneous Very Large Array and ionosondes observations
J. F. Helmboldt
The results of contemporaneous summer nighttime observations of midlatitude medium scale traveling ionospheric disturbances (MSTIDs) with the Very Large Array (VLA) in New Mexico a…
Very Large Array Observations of Disturbed Ion Flow from the Plasmasphere to the Nighttime Ionosphere
Joseph Helmboldt, Huib Intema
We present the results of a multi-scale analysis of TEC fluctuations using a roughly five-hour observation of the bright radio source Virgo A with the Very Large Array (VLA) at 74…
A New Technique for Spectral Analysis of Ionospheric TEC Fluctuations Observed with the Very Large Array VHF System: From QP Echoes to MSTIDs
J. F. Helmboldt, T. J. W. Lazio, H. T. Intema +1
We have used a relatively long, contiguous VHF observation of a bright cosmic radio source (Cygnus A) with the Very Large Array (VLA) through the nighttime, midlatitude ionosphere…
High-precision Measurements of Ionospheric TEC Gradients with the Very Large Array VHF System
J. F. Helmboldt, T. J. W. Lazio, H. T. Intema +1
We have used a relatively long, contiguous VHF observation of a bright cosmic radio source (Cygnus A) with the Very Large Array (VLA) to demonstrate the capability of this instrume…