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Comprehensive Geodetic Control Workshop: AC-16 Survey Training

Join the training workshop for aeronautical surveyors to learn about geodetic control, survey requirements, observations, and data processing for AC-16. Explore geodetic control options, permanent survey marks, and NGS examples.

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Comprehensive Geodetic Control Workshop: AC-16 Survey Training

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  1. Aeronautical Survey Training Workshop Corbin Training Facility AC-5300-16 Geodetic Control November 14-18, 2011

  2. Agenda for AC-16 Geodetic Control • Where to start • Overview (Plans and Data) • Survey Requirements • Survey monuments • Observations and data collection • Data processing • Required deliverables and submission

  3. Where to start • Statement of Work (SOW) • Geodetic Control Options • NEW PACS/SACS (AC-16 2.2.1) • Verify Existing PACS/SACS (AC-18 2.6.10.1.1) • Temporary Survey Marks (TSM’s) (AC 2.2.2) • AC-16 • FAA AGIS Web Page

  4. Where to start - AC 16 (continued) • What are PACS/SACS? • Permanent Survey Marks tied to NSRS (AC 8.4.1-8.6.1) • Horizontal and Vertical Datums (AC 3.1+3.2) • NAD 1983 • NAVD 1988 (Priority on BM’s)

  5. Where to start (cont.) • Introducing the NGS Web Page: FAA AC150 5300-16 Deliverables (Examples) • Sample Geodetic Control Plan (New PACS/SACS) • Minimum Requirements (Big Picture) • Airport Summary Report • Station Table • Airport Control Plot • Reconnaissance Photos

  6. Minimum Requirements Big Picture (cont.) • Station Location Sketch and Visibility Diagrams • GPS Observing Scheme • Project Vector Diagram • Proposed Instrumentation List • Listing of Data Processing Software • Quality Control Plan

  7. Where to Start (cont.) • NGS Example Geodetic Control Plan • The above is a link to the NGS example of a Geodetic Control Plan

  8. Where to Start (cont.) • Sample AC-16 Data Submission (New PACS/SACS) • Minimum Requirements (Big Picture) • Data (Raw Receiver and Rinex) • Field Logs • Photographs • Vector Processing Output • Project Vector Diagram

  9. Where to Start (cont.) • Minimum Requirements Data Big Picture (cont.) • Adjustment and Checking Program Output • Descriptions • Final Report • NGS Example AC 16 Data

  10. Where to Start (cont.) • What is required regarding AC-16 Plans and associated Data for the Verify Existing PACS/SACS or Temporary Survey Marks (TSM’s) Geodetic Control options? • AC-16 Geodetic Control Plans are not required • Do describe Geodetic Control within AC-18 Survey & QC Plan • Submit any Data with the AC-18 Data (Survey Data) submission

  11. Overview (AC-16 Plans - New PACS/SACS)RECON

  12. Overview (AC-16 Plans - New PACS/SACS) • Survey Preparation and RECON • NGS Database search • Existing Stations (stability code A, B, or C) • Need to Occupy by GPS • NSRS (HARN & BM Tie Candidates) • Definition of HARN Stations • BM Priority Table

  13. Bench Mark Priority Table

  14. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Survey Preparation and RECON • NGS Database search • NGS Data Sheets • DSWORLD Software • WINDESC

  15. Overview (AC-16 Plans - New PACS/SACS) (cont.) • RECON • Importance of Airport Manager Interview • Clearance to work on Airport • Any Existing NGS Marks on Airport (Published or Unpublished)? • Candidate sites for New Marks • Clear of future construction • Underground Utilities • Airport Security and Safety

  16. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Required Equipment for Vehicle • Unescorted access to AOA • Control Tower or Unicom • Taxiway Designations/Map • FAA Terminal Procedures Publication • FAA Airport Facility Directory • Call Sign • FAA Guide Airport Ground Vehicle Operations • Get a familiarization Tour of Airport

  17. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Survey Requirements/New PACS/SACS • Survey Monuments • Mark Settings/Stability Code A, B, or C • Stamping must be the LID followed by a sequential letter, followed by the year the mark was set. (eg. SFQ A 2009, SFQ B 2009, SFQ C 2009) • Site Conditions • Greater than 60 meters from runway edge • PACS/SACS should be 400 meters apart • Clear of ILS critical areas

  18. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Intervisibility • PACS and both SACS are all intervisible with each other • PACS is intervisible with both SACS but the SACS are not intervisible with each other. • PACS is intervisible with one SACS and both SACS intervisible with each other

  19. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Use of existing monumentation (PACS) • Meets stability A or B • An existing concrete mark with a published stability of “C” can be used if it meets the requirements of Section 8.4.3.1.: • The disk already exists • The monument is poured in place concrete • The monument is a triangulation station, azimuth mark, or bench mark stamped “U.S. Coast and Geodetic Survey”, or any mark stamped “National Geodetic Survey.” • The monument is set below the frost line. • The monument is set in non-expansive soils. • The monument shows no evidence of movement. • The monument meets all siting, construction, and intervisibility requirements.

  20. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Use of existing monumentation (SACS) • An existing mark may be used as a SACS if the mark meets A, B, or C stability.

  21. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Station Location Sketch and Visibility Diagram • Required for all marks (Proposed and Existing) • Show survey marks relation to • Runway ends • Taxiways • Airport Lights, fence lines, buildings • Reference measurements

  22. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Observations (minimum) and data collections • Observation Logs • CORS to PACS (TWO 4 hour sessions) • HARN Tie (ONE 4 hour session) • BM Ties(2 BM’s- ONE 4 hour session) • SACS – (TWO 1.5 hour sessions) • See AC 8.7.4-8.7.4.4 • See AC 8.7.5-8.7.6

  23. Overview (AC-16 Plans - New PACS/SACS) (cont.)

  24. Overview (AC-16 Plans - New PACS/SACS) (cont.) http://www.ngs.noaa.gov/ANTCAL/

  25. Example Project Vector Diagram

  26. Overview (AC-16 Plans - New PACS/SACS) (cont.) • Required deliverables • Geodetic Control Plan • NGS Sample • Submission • FAA AGIS Web Portal

  27. Overview (AC-16 Data - New PACS/SACS) • Survey Requirements – New PACS/SACS • Data Processing • PAGE NT Software (See AC 8.8.1) • Be sure to update the files on your computer from this site on a regular basis • Be sure to download the PRECISE ephemeris (CORS download page) • NGS recommends also downloading the Global Navigation File (CORS download page) • Adjust Utilities Software

  28. Overview (AC-16 Data - New PACS/SACS) (cont.) • Vector Processing (AC 8.8) • Pay attention to sequential order of vector processing • Solution type based on vector distance • PACS processed first • Process BM Ties from PACS • Process HARN Tie from PACS • Create PACS Gfile • SACS processed relative to PACS • Create SACS Gfile • See Readme.txt file for PAGE NT sample data set

  29. Overview (AC-16 Data - New PACS/SACS) (cont.) • NGS example (Process and Compare with posted G file) • Special Consideration for AZ, OR, WA, NV, CA, and AK • HTDP – Update positions and observations to a specified date.

  30. Example Vector Processing Scheme 1st CORS to PACS Session Averaged Coordinates for PACS 2nd CORS to PACS Session

  31. Solve Coordinates for PACS

  32. Example Vector Processing Scheme (cont.)

  33. Example Vector Processing Scheme (cont.) PACS to HARN and BMs (L3) Averaged PACS coordinates PACS to SACS (L1)

  34. Example Vector Processing Scheme (cont.) PACS to HARN and bench mark AND PACS to SACS sessions only

  35. Overview (AC-16 Data - New PACS/SACS) (cont.) • Create TWO separate Gfiles from running Sinex2g.exe • PACS.gfl – Contains CORS, PACS, HARN, BM vectors • SACS.gfl – Contains PACS and SACS vectors

  36. Overview (AC-16 Data - New PACS/SACS) (cont.) • Create TWO separate Bfiles • PACS.bfl – Contains CORS, PACS, HARN, and BM stations, sessions, and GPS antenna/receiver information • SACS.bfl – Contains PACS and SACS stations, sessions, and GPS antenna/receiver information

  37. Overview (AC-16 Data - New PACS/SACS) (cont.) • Create TWO sets of Afiles • Horizontal Free • Horizontal Constrained • Horizontal Free with Accuracies (QQRECORD) • Vertical Free • Vertical Constrained

  38. Overview (AC-16 Data - New PACS/SACS) (cont.) Bluebook • Adjustments (AC 8.9.2) • Pay attention to sequence of adjustments • PACS adjusted first • SACS adjusted relative to PACS (do NOT run MODGEE) • Run all Adjust checking programs on final files • Criteria for NSRS HARN Tie 5cm hor, 10cm ellipsoid • Criteria for NSRS BM Tie 15cm orthometric • Criteria for PACS to SACS 3cm hor, 4cm ellipsoid, 5cm ortho

  39. Overview (AC-16 Data - New PACS/SACS) (cont.) • Import final Bfile into WINDESC and complete descriptions/recovery notes for all stations except CORS. • Run spell check on all descriptions • Run DISCREP on all descriptions • Run NEIGHBOR on all descriptions • Export and check the Dfile • Run OBSDES to compare final Bfile and Dfile

  40. Overview (AC-16 Data - New PACS/SACS) (cont.) • Required Deliverables • NGS Sample • Submission • FAA AGIS Web Portal

  41. Help and Training • NGS Web Page: FAA AC150 5300-16 Deliverables • Training • Corbin Training Center

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