  We conducted an all-sky imaging transient search with the Owens Valley Radio
Observatory Long Wavelength Array (OVRO-LWA) data collected during the Perseid
meteor shower in 2018. The data collection during the meteor shower was
motivated to conduct a search for intrinsic radio emission from meteors below
60 MHz known as the meteor radio afterglows (MRAs). The data collected were
calibrated and imaged using the core array to obtain lower angular resolution
images of the sky. These images were input to a pre-existing LWA transient
search pipeline to search for MRAs as well as cosmic radio transients. This
search detected 5 MRAs and did not find any cosmic transients. We further
conducted peeling of bright sources, near-field correction, visibility
differencing and higher angular resolution imaging using the full array for
these 5 MRAs. These higher angular resolution images were used to study their
plasma emission structures and monitor their evolution as a function of
frequency and time. With higher angular resolution imaging, we resolved the
radio emission size scales to less than 1 km physical size at 100 km heights.
The spectral index mapping of one of the long duration event showed signs of
diffusion of plasma within the meteor trails. The unpolarized emission from the
resolved radio components suggest resonant transition radiation as the possible
radiation mechanism of MRAs.
