Foundations of Global Navigation Satellite Systems (GNSS)

Foundations of Global Navigation Satellite Systems (GNSS)
    • Languages: English
    • Publish Date: 2017-04-21
    • Skill Level: 2 '
    • Completion Time: 1.25 - 1.50 h
    • Includes Audio: no
    • Required Plugins: none
    • Topics:
      Geospatial
    • Reviews:

      (13 reviews)

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garnertw 2017-10-09 16:30:19

While I find the course material sound, the web quiz was confusing. In general, the material is too heavily slanted to the survey community and could be generalized for the larger GPS community. In addition, the material contains some factual errors (like stating that GPS is on the ITRF, when it is on the WGS 84). But overall, a useful lesson.
SanAntone 2017-10-06 15:43:54

I really appreciate the outside links you provide in context, where additional information can be found.
sujithvarma688 2017-08-08 20:34:44

excellent
coandrei 2017-06-28 16:39:37

This lesson contains several good visualisations helpful for GNSS education. On the other hand, there are also several inconsistencies. I point out below few I spotted:section 2f: The statement "With three satellites in view, the receiver should be able to figure out where it is in three dimensions (lat/long/height) on the surface of Earth" is incorrect. 3 sats give us 2D pos (lat/lon) + rx clksection 5b:The formula for the radius curvature in the prime vertical is completely erroneous. appendix2:Partial derivates for the pseudorange should take the squareroot to denominator. Also, I believe there should be minus sign. There is subscript inconsistency for ∆P on the left part of the matrix form.

[Editor's note: Thank you for the feedback and for catching the errors in the formulas. In 2f, we have reworded the text to make the point more clear. The errors in 5b and appendix 2 have been corrected.]
ejaymet 2017-06-21 07:24:14

Good - quite concentrated but straightforward explanation. More equations available in appendices for those who want them.
lrichardson64 2017-06-20 18:38:44

This lesson contains a lot of good information but it is not broken down in an sort of easily absorbable way.
michael_endicott@nps.gov 2017-06-17 15:06:22

This lesson is very informative in a technical fashion that might make it difficult for people with little to no prior knowledge to manage.
kdrozd 2017-06-15 16:26:11

Covers all needed basic topics to start GNSS adventure...
WHH114 2017-06-14 16:02:33

I like this new format and the quizzes really make you think. This material is something that everyone insurveying needs to know and learn.
chrispucci 2017-06-14 09:15:30

Pretty good crash course on GNSS. Covers a lot of complex material in a very short period. The quiz format with multiple correct answers is tough thought!
sblanton3 2017-06-13 14:00:26

I had to read the material a number of times to be sure I understood. There are area which could be a little more in depth and a few terms that need to be better defined. There is a mathematical error on Unit 3 question 3. -- 0.579 cycles at .19 m/ cycle is 11 cm.not 13.1 cm. Unit 3 question 4 the 'correct' answer gives 1Ghz as 1x109 instead of 10 to the 9th power.

[Editor's note: Thanks for the feedback and for catching these errors. The errors have now been corrected.]
Javier Fraile 2017-06-11 15:36:23

Good presentation and slides.
shaggy073077 2017-05-26 19:17:08

n/a