Topic outline

  • Post-Processing of Differential GPS Observational Data

    Credits: 3 PDH

    PDH Course Description:

    GPS baseline solutions are usually generated through an iterative process. From approximate values of the positions occupied and observation data, theoretical values for the observation period are developed. Observed values are compared to computed values, and an improved set of positions occupied is obtained using least-squares minimization procedures and equations modeling potential error sources. Observed baseline data are also evaluated over a loop or network of baselines to ascertain the reliability of the individual baselines. A generalized flow of the processes used in reducing GPS baselines is outlined in this course.

    Topics:

    • General Differential Reduction Techniques
    • Carrier Phase Observables
    • Baseline Solution by Linear Combination
    • aseline Solution by Cycle Ambiguity Recovery
    • ield/Office Baseline Processing
    • Resultant Baseline Output and Quality Criteria
    • Examples of Baseline Reduction Software Output
    • Baseline Reduction Summaries
    • Baseline Reduction in Mapping Grade GPS Receivers
    • ield/Office Loop Closure Checks
    • On-Line Positioning User Service (OPUS)
    • Baseline Data Management and Archival

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    Intended Audience: This course is intended for surveying and engineering professionals whose job description may require an advanced knowledge of GPS technology and data post-processing procedures.
    Publication Source: USACE (Corp of Engineers)

    Donald Parnell, PE

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