I'm brand new to post processing using OPUS or any other post processing method.  A couple of days ago I collected 5 points, each for 20 minutes and uploaded them to OPUS.  All point were collected with the same setting on my data collector.  Four of the points came back with good results.  One of the points didn't process and I received the following error from OPUS

The file Base_3 seems to have a collection interval of 14 seconds!brThe collection interval must be 1,2,3,5,10,15 or 30 seconds to be processed by OPUS.            

1. I'm wandering why this happened and if I can edit the TPS file to possibly remove the data point that is causing the problem??

2.  With regard to the four points that were processed, can anyone elaborate on the quality of the data based on following typical results?

             OBS USED:     91%

             QUALITY IND.      13.47/ 2.56

             NORMALIZED RMS:          0.356



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We take the avg. of each OPUS combined factor. EX. say you did 4 statics youd want to avg. those 4 combined factors for one combined factor.


I think you got it... At some point you have to stop "chasing the bubble" as we call it.  If these two points were property corners on a current ALTA survey, both would be valid with your raw data, let alone adjusted and refined.  The current ALTA accuracy is 0.07' or 2 cm so you are within your distributed error.   

I generally allow 0.03' or 1 cm per point for instrument tolerances and go with it.

Good Luck,



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