I guess you'd be the right person to answer the question then.
How many planes were there out over the ocean, coming in from the direction of Hawaii, at an altitude consistent with overflying the coast?
Were there ANY in the previous two hours which would leave a persistent contrail that would show up in the images?
R578 was eastbound route for that day, there was one about every 10 to 15 minutes according to JEPP-PRO Tracking Software we use.