topcon tools familiarization -...

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LAB PROCEDURES: TOPCON TOOLS FAMILIARIZATION This lab will cover the basic setup and processing options of Topcon Tools (TT). We will learn how to start a project, upload data and control files, set up processing options, analyze and modify data. Use eighthour sessions for static surveys. RUN TOPCON TOOLS IN THE PROGRAM MENU. If the licensing menu comes up, remove the current incorrect location, select the (+add server) button, and enter the IP address 146.186.78.157 START A NEW JOB CALLED “NAME” IN TT. Set the subdirectory and place the job on your USB drive. IN JOB MENU SELECT JOB CONFIGURATION (CTL+F2) Open the Topcon Tools Program At the Startup Dialog Box select New Job New Job dialog box enter: Job Name: Job Location: Created By: Comments: Configuration: GPS+ Edit Configuration Screen: Display: Set for prescribed accuracy Coordinate Systems: Select none (WGS84) Projection: (Example: USA => SPC83 => Pennsylvania North) Datum: NAD83(2011) Geoid: Select the geoid file g2012au4. You will need to download this from the NGS geodetic toolkit (Geoid 12A Zone 4) with "little endian" file format Coordinate Type: Type to Datum, Lat, Lon, Elevation Units: Select the units Save: Select an auto save time interval Line work: Select if needed Adjustment Screen: Confidence Level: 95% Rejection Criterion: Tau Criterion TS (Total Stations) Computations: Select if needed GPS + Post Process Elevation Mask = 15° Minimum Observation Time: 60sec Enable Continuous Kinematic: Check or uncheck (Static Survey) Compute DOPs: Check

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LAB  PROCEDURES:  TOPCON  TOOLS  FAMILIARIZATION    This  lab  will  cover  the  basic  setup  and  processing  options  of  Topcon  Tools  (TT).  We  will  learn  how  to  start  a  project,  upload  data  and  control  files,  set  up  processing  options,  analyze  and  modify  data.  Use  eight-­‐hour  sessions  for  static  surveys.    RUN  TOPCON  TOOLS  IN  THE  PROGRAM  MENU.  If  the  licensing  menu  comes  up,  remove  the  current  incorrect  location,  select  the  (+add  server)  button,  and  enter  the  IP  address  146.186.78.157    START  A  NEW  JOB  CALLED  “NAME”  IN  TT.  • Set  the  subdirectory  and  place  the  job  on  your  USB  drive.  

 IN  JOB  MENU  SELECT  JOB  CONFIGURATION  (CTL+F2)  Open  the  Topcon  Tools  Program    

  At  the  Startup  Dialog  Box  select  New  Job     New  Job  dialog  box  enter:  

• Job  Name:  • Job  Location:  • Created  By:  • Comments:  • Configuration:  GPS+  

  Edit  Configuration  Screen:  • Display:  Set  for  prescribed  accuracy  • Coordinate  Systems:  Select  none  (WGS84)  • Projection:  (Example:  USA  =>  SPC83  =>  Pennsylvania  North)  • Datum:  NAD83(2011)  • Geoid:  Select  the  geoid  file  g2012au4.  You  will  need  to  download  this  from  the  NGS  geodetic  toolkit  (Geoid  12A  Zone  4)  with  "little  endian"  file  format  

• Coordinate  Type:  Type  to  Datum,  Lat,  Lon,  Elevation  • Units:  Select  the  units  • Save:  Select  an  auto  save  time  interval  • Line  work:  Select  if  needed  

Adjustment  Screen:    • Confidence  Level:  95%  • Rejection  Criterion:  Tau  Criterion  • TS  (Total  Stations)  Computations:  Select  if  needed  • GPS  +  Post  Process  • Elevation  Mask  =  15°  • Minimum  Observation  Time:  60sec  • Enable  Continuous  Kinematic:  Check  or  uncheck  (Static  Survey)  • Compute  DOPs:  Check  

 

 

May  need  to  adjust  the  settings  in  the  Quality  Control  section  (i.e.  change  the  defaults  for  short  baselines)  

  Click  “OK”  to  create  the  job    DOWNLOAD  THE  FILES  AS  DESCRIBED  BELOW      http://www.ngs.noaa.gov/UFCORS/  • Download  eight-­‐hour  sessions  of  data  (from  User  Friendly  CORS  website  if  using  CORS  stations  for  the  control)  for  control  stations,  use  a  30-­‐sec  epoch  rate.  Need  the  station  coordinate  file,  meterological  file,  NGS  data  sheet,  and  IGS  precise  ephemeris.  (only  need  the  IGS  precise  ephemeris  and  meterological  file  once  for  each  session,  only  need  the  station  data  sheet  and  coordinate  file  once  for  each  station).  

• Check  with  WORDPAD  (write.exe)  to  ensure  there  is  data  in  the  files.  • Import  control  files  (listed  above)  into  Topcon  Tools.  • Import  the  Unknown  Station  file(s)  into  Topcon  Tools.  • Obtain  the  control  coordinates  from  the  xxxx.pos.txt  files.  View  these  files  with  WordPad  or  Word  and  manually  type  latitude  and  longitude  information  along  with  the  control  station  ellipsoid  height  from  the  data  sheet  into  in  TT.    

• Again,  if  files  do  not  open  in  TT,  then  open  the  particular  file(s)  with  WORDPAD  and  check  for  an  error  message.  (You  may  need  to  re-­‐download  the  files  if  several  users  are  trying  to  download  at  the  same  time).        

   

     PROCESS  THE  BASELINE  DATA  Disable  the  trivial  baselines  and  process  (F7)  remembering  only  (n  −  1)  nontrivial  baselines  exist  in  each  session.  These  baselines  may  not  form  a  closed  triangle  since  that  would  make  one  of  the  lines  trivial.  (Though,  if  only  one  session  is  used,  there  must  be  closed  loops  to  check  loop  closure.)    

   

Correct  any  problems  that  may  occur  during  this  processing  (i.e.  some  baselines  may  be  red)  Corrections  can  be  made  by  computing  the  estimated  error  in  the  horizontal  and  vertical  components  of  the  baseline,  then  raising  horizontal  and/or  vertical  tolerances.    

𝜎!"!#$ = 𝑛 ∙ 𝜎!! + 𝑎! + 𝐷 ∙𝑏10!

!

 

σi  =  estimated  error  in  the  setup  of  the  receivers  n  =  number  of  setups  

a  =    constant  error  for  the  horizontal  or  vertical  component  b  =  scalar  error  for  the  horizontal  or  vertical  component  

D  =  length  of  the  line  The  manufacturer's  values  for  a  and  b  are  given  in  the  technical  specs  for  the  instruments.  

(In  class,  this  was  assumed  a  =  5  mm  and  b  =  0.5ppm)    

𝒑𝒑𝒎 =𝜎𝑡𝑜𝑡𝑎𝑙

𝐿𝑜𝑜𝑝  𝐿𝑒𝑛𝑔𝑡ℎ  𝑜𝑟  𝐵𝑎𝑠𝑒𝑙𝑖𝑛𝑒  𝐿𝑒𝑛𝑔𝑡ℎ∙ 10!  

 Additionally,  red  baselines  may  be  caused  by  the  GPS  receiver  antennas  being  set  improperly  or  the  fact  that  there  is  no  receiver  antenna  selected.    • Repeat  the  above  steps  for  each  session  (starting  at  “DOWNLOAD  THE  FILES  AS  DESCRIBED  BELOW”.  

• Perform  loop  closures  • Perform  a  network  adjustment  (F8)    

                                           

CREATE  THE  REPORT  Go  to  Report  =>  Report  Configuration  • Add  Sections  as  necessary,  do  not  overload  the  report  page  width.  • Use  the  Snipping  Tool  to  copy  and  paste  the  Traverse  Diagram  into  the  report.  • Make  an  Excel  file  of  the  Report  so  that  editing  will  be  simplified.  

 REPORT  SECTIONS  Project  Summary  Adjustment  Summary  Control  Points  • Latitude  • Longitude  • Elevation  (Datum)  • X,  Y,  Z  • Ellipsoid  Height  

Used  GPS  Observations  • dN  • dE  • dHt  • Horz  RMS  • Vert  RMS  • PDOP  • HDOP  • VDOP  

GPS  Observation  Residuals  • Res  X  • Res  Y  • Res  Z  • Res  n  • Res  e  • Res  u  

Final  Adjusted  Coordinates  • Latitude  • Longitude  • Elevation  (Datum)  • Standard  Deviation  N  • Standard  Deviation  E  • Standard  Deviation  U  • X,  Y,  Z  • Sigma  X  • Sigma  Y  • Sigma  Z  • Ellipsoid  Height  

     

Baseline  Data  • Azimuth  • Distance  • Delta  Elevation  • Solution  Type  • Epochs  

 Loop  Closures  • dHz  (m)  • dU  (m)  • Horz  Tolerance  • Vert  Tolerance  • dHz  (ppm)  • dU  (ppm)  • Length  

Receiver  Information  • Receiver  Vendor  • Receiver  • Antenna  Type  • Ant  Height  Method  • Start  Time  • Stop  Time  • Duration    • GPS  Week,  Day  

Adjusted  Coordinates  Compared  to  Published  SPCS  Coordinates     Adjusted       N       E       Elevation  (Datum)  

Use  the  NGS  HTDP  software  (from  geodetic  toolkit)  to  make  the  adjusted  coordinates  valid  for  the  day  that  the  adjustment  was  processed.  Interactively  transform  positions  between  reference  frames  and/or  dates.  =>  Individual  points  entered  interactively. Use  NAD_83  (2011/CORS96/2007)…(North  America  Plate  Fixed)  and  WGS-­‐84  (G1674)  and  ITRF2008.  Obtain  the  processed  data  from  HTDP  and  type  into  the  report  http://geodesy.noaa.gov/TOOLS/Htdp/Htdp.shtml

  SPCS  Published       N       E       Elevation  (Datum)