jblaisdell 2017-07-04 11:41:20

Good visualization of geodetic and geocentric latitudes and good examples of magnitudes of the various effects on gravity.

coandrei 2017-06-24 07:18:24

A good informative lesson to start with. The visuals and attached exercises support the learning of various concepts. The completion time may be a bit too optimistic and is only for perhaps grasping. Consider at least 2 or 3X more time for going thoroughly over the lesson. Furthermore, please notice that notation of geodetic latitude is 'lambda' instead of 'phi'. In many references, lambda denotes the longitude.

Cryosphere 2017-05-01 15:33:20

Esta leccion es muy importante, es importante sber como funciona el campo gravitatorio terrestre y como se elaboran los mapas, para no equivocarse a la hora de entender un mapa y porque se eliguen unos elipsoides u otros dependiendo de la zona geografica, o como nos afecta la subida del nivel amrinoo, o que cambios importantes se estan produciendo en las masas de hielo o en las corrientes marinas, que nos puedan indicar cambios de ciclos, pro ejemplo el niño, o cambios en el nivel marino

meredithpayne 2017-04-24 13:32:12

A great way to do a quick brush-up on fundamental physical principles governing gravity on Earth.

WHH114 2017-04-24 12:30:05

This was a very informative learning experience and I am going to recommend it to my colleagues.

GPSman 2017-04-21 21:37:49

A poll such as this one should not be called a survey. JAC

Batuh 2017-04-21 04:43:56

Thanks

prasadraprolu 2017-04-16 08:55:33

very nice

jdcampos 2017-04-16 03:07:32

Very intuitive lesson, easy of undestanding and kind interesting.

dickrichter 2017-04-14 13:31:45

Great course.

peterngreenhalgh@ntlworld.com 2017-04-11 11:17:39

This was great - simple but very effective

Agin Cajun 2017-04-02 13:43:20

Test questions somewhat vague/confusing due to lack of information in presentation. This led to guessing due to lack of provided content in body of question itself.

diogorau 2017-03-30 11:17:25

I really enjoyed the subject, having no knowledge of geodesy. It was a fascinating lesson and advanced my understanding quite a bit.

terevera 2017-03-29 14:26:08

The topic was explained in a readily and clear way. I enjoyed the exercises illustrating concepts.

PluviAl 2017-03-29 12:43:39

I did not take the lesson, only the pre-test. I answered the above based on the pretest, and how well it worked, and informed, and on the excellent, and generous, products from MetEd. I respond to let you know of the error. I got up in the middle of the night to cool a bag of ice for my back. I left the class because it was cool. Thanks for your help in educating me and your wonderful work.

simonsuniverse 2017-03-29 09:16:27

A very interesting primer on Geodesy.

Uchenna Victor 2017-03-29 09:12:59

The content is awesome and helps to better understanding of Gravity.

idollery 2017-03-28 17:42:44

A straight forward explanation of the science with relevant questions. A summary which grouping the different effects on gravity (which are discussed) with their relative magnitudes would be useful.

1. Define the basic properties of gravitation.
2. Explain the properties of gravitation near a large mass such as a planet.
3. Explain the relationship between gravitation and gravity.
4. Identify density, altitude, and latitude as the three key influencing factors on gravity.
5. Explain how gravity’s magnitude varies with latitude.
6. Show how gravity’s magnitude decreases with altitude.
7. Give examples of high and low density features of Earth and the resulting changes in gravity.
8. Describe the impact of mass movement on gravity.
9. Identify the signals that gravimeters measure.

national geodetic survey, geodesy, gravity, gravitation, gravity field, geoid, the geoid, ellipsoid, geopotential, geopotential datum, earth gravitational model, gravity anomalies, geodetic latitude, geocentric latitude, gravity, gravitation, ellipsoid, ellipsoidal earth, vector force, newton, newtonian physics, Newton’s Second Law of Motion, Somigliana-Pizetti equation, apparent force, centrifugal force, universal gravity constant, gravity calculation, gravity variations, earth density, gravity measurement, gravimeter, mass movement