Yes, that is SuperDARN. SuperDARN often hits / nags out on 10600 and that area.
I typically do not classify SuperDARN as an OTHR. For sure it is a radar, and for sure it operates over the horizon, however when many people talk about "OTHR" they envision a radar that is looking for man made stuff, aircraft, missiles, ships, things like that. SuperDARN is not tracking those kinds of things, but is rather looking at the natural environment.
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