Did you flop the scope on the instrument when you doubled your angles? This will remove plunge error and alignment if instrument is out of adjustment. Did you check your rod HI with a tape to make sure your pole matches the increments? Did you adjust your pole bubble vial before starting? There are so many probabilities to introduce this kind of error.
> Did you flop the scope on the instrument when you doubled your angles? This will remove plunge error and alignment if instrument is out of adjustment. Did you check your rod HI with a tape to make sure your pole matches the increments? Did you adjust your pole bubble vial before starting? There are so many probabilities to introduce this kind of error.
Aloha, Steve:
Angles were doubled. BS>FS plunge FS>BS. I did the compensator balancing and collimation calibration as well.
I used to use rod. After a lot of good advice from the forum all my foresight and backsight are set on tripod and tribrach. I centered them all with level build-in with the total station.
These errors mostly occurred due the way data were organized with TDS raw data file and how they were utilized in LSA software. I use Survey Pro field software. There were couple that I mis-entered. I was able to fix them with help of several of us on this forum! :good:
Now I am a happy camper. It took me almost two years to get here:-)
Mahalo
> Did you flop the scope on the instrument when you doubled your angles? This will remove plunge error and alignment if instrument is out of adjustment.
I have his raw data file and can assure you that all angles and distances were read FR and FL, 3 sets each, with results as tight as one could hope for.
>Did you check your rod HI with a tape to make sure your pole matches the increments?
All of the issues with the data came down to:
A) point numbering, which were easy to fix knowing the traverse went 1-2-3-4...etc.
B) measure ups at the targets, which were fixed by reference to Yswami's notes.
The angle and distance data was all good.
>Did you adjust your pole bubble vial before starting? There are so many probabilities to introduce this kind of error.
Must have, because the residuals were within the expected range.
A snippet of the .raw file...
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--Activating Total Station: Trimble S / V Series S3/S6/S8/VX, Direct Connect,9600,None
OC,OP2,N -748.433000,E -14553.924000,EL439.467430,--CP2
BK,OP2,BP1,BS19.271921,BC0.0000
LS,HI5.449,HR4.995
--BS check 2 - 1:ZE96.023725,SD260.457802,HD err= 0.018074, VD err= 0.065929
--BS Circle check : angular err= 0.000097
--Target Generic Prism: "SECO NODAL ECLIPSE", HR:4.995 (4.995 + 0.000 Offset), Prism Const.:-40.0mm
OB,OP2,FP1,AR359.595903,ZE96.023725,SD260.457802,--CP1
--Check Point: Date: 5/17/15, Time: 12:06:48.000
--delta= N:0.017449 E:0.004869 Elev:-0.065929
--Date: 5/17/15, Time: 12:12:22.000
-- Fixed Backsight Target Generic Prism: "SECO NODAL ECLIPSE", HR:4.995 (4.995 + 0.000 Offset), Prism Const.:-40.0mm
LS,HI5.449,HR5.435
--Target Generic Prism: "SECO NODAL ECLIPSE", HR:4.995 (4.995 + 0.000 Offset), Prism Const.:-40.0mm
LS,HI5.449,HR4.995
RD,BD 1:0.000000
--Target Generic Prism: "SECO PREMIER ECLIPSE", HR:5.435 (5.435 + 0.000 Offset), Prism Const.:-30.0mm
LS,HI5.449,HR5.435
RD,FD 1:178.152056
RD,ZD 1:89.120968
MD,SD 1:393.126768
RF,OP2,FP3,AR178.152056,ZE89.120968,SD393.126768,HR5.435,--CP3
RD,FV 1:358.151602
RD,ZV 1:270.480101
MD,SD 1:393.122962
RF,OP2,FP3,AR358.151602,ZE270.480101,SD393.122962,HR5.435,--CP3
--Target Generic Prism: "SECO NODAL ECLIPSE", HR:4.995 (4.995 + 0.000 Offset), Prism Const.:-40.0mm
LS,HI5.449,HR4.995
RD,BV 1:180.000000
RD,BD 2:0.000000
--Target Generic Prism: "SECO PREMIER ECLIPSE", HR:5.435 (5.435 + 0.000 Offset), Prism Const.:-30.0mm
LS,HI5.449,HR5.435
RD,FD 2:178.152056
RD,ZD 2:89.120968
MD,SD 2:393.124176
RF,OP2,FP3,AR178.152056,ZE89.120968,SD393.124176,HR5.435,--CP3
RD,FV 2:358.151440
RD,ZV 2:270.475939
MD,SD 2:393.123946
RF,OP2,FP3,AR358.151440,ZE270.475939,SD393.123946,HR5.435,--CP3
--Target Generic Prism: "SECO NODAL ECLIPSE", HR:4.995 (4.995 + 0.000 Offset), Prism Const.:-40.0mm
LS,HI5.449,HR4.995
RD,BV 2:180.000000
RD,BD 3:0.000000
--Target Generic Prism: "SECO PREMIER ECLIPSE", HR:5.435 (5.435 + 0.000 Offset), Prism Const.:-30.0mm
LS,HI5.449,HR5.435
RD,FD 3:178.152056
RD,ZD 3:89.120968
MD,SD 3:393.122109
RF,OP2,FP3,AR178.152056,ZE89.120968,SD393.122109,HR5.435,--CP3
RD,FV 3:358.151181
RD,ZV 3:270.480425
MD,SD 3:393.122765
RF,OP2,FP3,AR358.151181,ZE270.480425,SD393.122765,HR5.435,--CP3
--Target Generic Prism: "SECO NODAL ECLIPSE", HR:4.995 (4.995 + 0.000 Offset), Prism Const.:-40.0mm
LS,HI5.449,HR4.995
RD,BV 3:180.000000
--Target Generic Prism: "SECO PREMIER ECLIPSE", HR:5.435 (5.435 + 0.000 Offset), Prism Const.:-30.0mm
LS,HI5.449,HR5.435
SS,OP2,FP3,AR178.151732,ZE89.120407,SD393.123787,--CP3
--Converted Slant HI: 4.865 to HI: 5.374202
--raw= HR:5.3 HA:0.000032 SD:393.133657 ZA:90.485803
--Check By Distance: HA:0.000032 ZE:90.485803 SD:393.261
TR,OP2,FP3,AR178.151732,ZE89.120407,SD393.123787,--CP3
-- Fixed Backsight Target Generic Prism: "SECO NODAL ECLIPSE", HR:5.300 (5.300 + 0.000 Offset), Prism Const.:-40.0mm
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