I’m not familiar with the SDR software that you are using, but the pilot carrier on 54.310 suggests to me that it is an ATSC 1.0 station. This is E-skip season and channel 2 is the best channel for sporadic E. Based on the distance for E-skip, I’d guess KJWP in Wilmington, DE.
From what I've since found out, the signal that my HDHomerun Connect 4K was picking up was KBRO-LD, Fort Collins, CO, which broadcasts in ATSC 3.0. I did also briefly pick up KREX-TV, Grand Junction, CO (I forgot to mention that.), which does broadcast in ATSC 1.0, briefly just a few minutes, or so, before making that screen capture. The 2 signals were probably mixing, as both of them are on Ch. 2 (ATSC 1.0 signals have curves on both ends of their spectrum with a pilot signal, ATSC 3.0 signals have cliffs on both ends with no pilot signal. The cliff, on the left, was from KBRO-LD, the pilot signal, & possibly the rest of it, was from KREX-TV).