GPS and GNSS
Check out a preview of “GNSS Aided Navigation & Tracking” (click here)
GNSS Aided Navigation & Tracking
– Inertially Augmented or Autonomous
By James L. Farrell
American Literary Press. 2007. Hardcover. 280 pages
This text offers concise guidance on integrating inertial sensors with GPS and also its international version (global navigation satellite system; GNSS) receivers plus other aiding sources. Primary focus is on low-cost inertial measurement units (IMUs) with frequent updates, but other functions (e.g., tracking in numerous modes) and sensors (e.g., radar) are also addressed.
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Dr. Farrell has many decades of experience in this subject area; in the words of one reviewer, the book is “teeming with insights that are hard to find or unavailable elsewhere.”
An engineer and former university instructor, Farrell has made a number of contributions to multiple facets of navigation. He is also the author of Integrated Aircraft Navigation (1976; five hard cover printings; now in paperback) plus over eighty journal or conference manuscripts and various columns.
Frequent aiding-source updates, in applications that require precise velocity rather than extreme precision in position, enables integration to be simplified. All aspects of integration are covered, all the way from raw measurement pre-processing to final 3-D position/velocity/attitude, with far more thorough backup and integrity provisions. Extensive experimental results illustrate the attainable accuracies (cm/s RMS velocities in three-dimensions) during flight under extreme vibration.
The book on GPS and GNSS provides several flight-validated formulations and algorithms not currently in use because of their originality. Considerable opportunity is therefore offered in multiple areas including
* full use of highly intermittent ambiguous carrier phase
* rigorous integrity for separate SVs
* unprecedented robustness and situation awareness
* high performance from low cost IMUs
* “cookbook” steps
* new interoperability features
* new insights for easier implementation.
Discussion of these traits can be seen in the excerpt (over 100 pages) from the link at the top of this page.