LORAN/low RF frequency dervied clock jitter

[coppercone2]

Am I correct in thinking that atomic clock transmission signals carried by low frequency RF, like in the KHz, will have very high jitter compared to signals derived from fast clocks, because there is a greater period where noise can effect the markers? Then something with GPS in the GHz? I am thinking about it in terms of zero crossing noise

And like, how is the quality of the clock derived from the different WW(or other) stations different as their transmitter frequency goes up (I think the slowest are like 10KHz and it goes up to 30MHz or so)