5 calibration procedures a collimation time interval

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5. Calibration Procedures: a. Collimation Time Interval – The time interval between collimation error determinations shall not be longer than one day for all leveling instruments. This information shall be recorded as part of the leveling raw dataset. 6. Field Procedures: a. Minimal Observation Method – The “electronic digital/bar-code” leveling method shall be used for all leveling work. b. Section Running – The “double run” leveling procedure shall be used to perform the leveling from the valid bench mark to the CORS. 7. Office Procedures: The paragraph in the FGCS Specifications, under Office Procedures, regarding normalized residuals and least squares adjustments models does not apply to this leveling work, except the superscript footnote “n” for collimation error shall apply. (end) Version 1.10 (October 28, 2004) Page 19 of 36 6/14/2018 2:20 AM
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Appendix B – CSRC Antenna Measurement Form Example of completed form for a CGPS site. Version 1.10 (October 28, 2004) Page 20 of 36 6/14/2018 2:20 AM
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Appendix C – CSRC Benchmark Reconnaissance Form Example of completed form for the benchmarks for the level runs to a CGPS site. Version 1.10 (October 28, 2004) Page 21 of 36 6/14/2018 2:20 AM
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Appendix D – CSRC Site Leveling Plan Example of leveling plan for a CGPS site. Version 1.10 (October 28, 2004) Page 22 of 36 6/14/2018 2:20 AM
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Appendix E - Data Processing For NGS Vertical Project Submission Once the raw leveling data file is collected from the field, it needs to be properly formatted and processed for submission to be included in the NGS database (a process that is commonly called “blue booking”). The guidelines in the next sections will step through this process, which utilizes three NGS program suites, NABOOK, VFPROC , and WDDPROC . (The NABOOK program has to be purchased by the user; the VFPROC and WDDPROC programs are free on the web site, but the documentation for it has to be purchased by the user.) The VFPROC programs are DOS-based, but NGS has been working to convert them to Windows-based programs. These Windows–based programs are recommended over the DOS-based suite, because of better ease of use. The use of the Windows versions will be described here. The project managers and field crews need to be familiar with the documentation for these programs, in addition to the NGS guidelines for vertical project submission, and of course the FCGS specifications and the documentation for their equipment, before starting any field work. (The documentation for NABOOK, called DvlGuide, is very useful and has straightforward instructions for preparation and method for leveling).The purpose of this Appendix is not to replace these other documents, but to help clarify and highlight some of the items to pay attention to that will help the whole process move smoothly.
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