How was your OPUS GPS yesterday, 8/30/2018?
First problem I had a small job thrown at me and had to cover that before doing my main project later than I wanted. The open area next to my survey parcel is the local fire department and they are setting up for a carnival blocking any chance of using a total station. My corner search was not as fruitful as desired. I have one control point from previous monitoring wells in their front parking lot and had picked a point in the back from an aerial photo. Thankfully that was not yet occupied by a booth. Open sky but some horizon issues. Late afternoon start so my 4 hour observations ran into the next GPS day. Not as many satellites as I anticipated. Not finding any property corners off the bat, my second point is a found corner for a cell tower easement and it falls under a power line. Seven satellites for the duration but two almost never resolve the L2 observations. Besides the 2 OPUS observations I have 3 L only receivers on 5 outlying points. The last two setups had low satellite counts, 5, for a considerable time. To add to that my rod walked off the spike next to sidewalk on one reoccupy tie in point, 0.08′ variance in the X direction.
I can live with the lower precision since this is to get my started to lead into overgrown woods and recover property corners. since I have a prior OPUS control point I can even continue if I do not get these two positions today. The carnival is all next week so I can take some time and ponder a bad GPS day.
Paul in PA
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