By always facing north and bubble on rod facing the same my relative is better my absolute would have a systematic error.
Sure all rover points will be relatively tight but have to disregard the base point. Personally not a fan of just setting up base randomly as harder to check hasn't gone off level/moved when you get back.
Oh, I dunno-- if you stomp the legs in there shouldn't be really any settling at all. Checking into other control or even previously shot topo points throughout the day helps confirm the base hasn't moved.
It's the idiot/inference factor I'm more concerned about than legs settling (unless your on tar on a hot day). Has a crew member cut corners with setup or done kid lent on the legs while you were away. Ideally neither but staff not perfect and can't always keep the base away from public in town. Also can't always choose existing control points so not always ideal setup locations.
@bstrand back when we had non on the fly initializations i kept a cargo pocket full of old golf Tees. So when doing a topo every so often I would place one in the ground and locate it as a ground shot or whatever i would write that number down in my shirt pocket field book so i had a short walk back to check in or get initialized again. Or as a check. Golf tees where light and easy to come by and didn’t cost anything. This was when we had cables from data collector to antenna and to receiver that was operated by motor cycle batteries and the large cam corder batteries . The idea was once you start you don’t stop so who knows how much weight those old 4000ssi were plus the cam corder and one moter cycle battery was. All i know is when trimble came out with the 4800 all in one receiver and antenna and we only had two cables the battery was part of the pole. It was like the best thing since sliced bread. Now the r12s are like less than half that size.
@rover83 I was pondering this last night as i woke up. One of those what if thoughts. While i can agree that phase center offset is below rtk accuracy sometimes depends on the offset amount all antennas are different and even same models differ. What’s your thoughts on your centering error knowing it’s randomly off based on that offset not being north faced. Does this fall within the parameters now to add a little extra weighting to the pole tip of centering you think. Our bubble at best in complete adjustment is only so tight and now we throw additional error in thats not accurately accounted for from signal phase centers. L1 L2 etc or would you still think thats a wash as well. Also what about the way the receivers and antennas are looking or think they are looking for the satellite orbits to rise and fall. I know this is all in the weeds. Just had the thought is all.
