good morning to all. while i am in the process of laying up and recovery from medical, i thought i would post some trivia. has to be more fun than p and r
geodetic history;
1 eratosthenes measured and computed arc distances from vertical angles to the sun from which two cities?
2 j richer measured gravity in paris and cayenne (guinea) using what instrument?
3 who was the first person to adjust a triangulation network, using least squares, for computing ellipsoidal parameters? when and where?
4 in 1878, h bruns proposed a concept known as the cage of bruns, a visualization of a system we now use. what is it?
stay tuned
survey trivia part two
reference frames, datums, coordinates systems;
5 in the earth fixed Cartesian coordinate system (geocentric), what does the Z axis pass through?
6 a geocentric coordinate system originates at earths center of mass (geocenter). true or false
7 gps and gnss systems operate originally in which system?
A: ITRF97 meters
B: WGS 84 lat lon ellipsoid
C: spherical coordinates
D: GRS 80
E: Cartesian X,Y,Z
eddie
Good questions... I'm curious to see ALL of the answers that will be posted.
Loyal
1)Alexandria and Syene (now Aswan, Egypt)
survey trivia part trey
8 what is the origin difference betwixt GRS80 and WGS84?
a less than 0.5m
b about 1m
c about 3m
9 VLBI, or very long baseline interferometry, measures:
a intercontinental rat farts
b pulsars
c quasars
d magnitude 1 stars
e magnitude 1 and 2 stars
to Loyal and all others
make no mistake about it, i am laying up in medical recovery, reading my books. just writing a quiz to keep us all thinking. to me, it is much more worthwhile than p and r. i am not boasting my own knowledge, this material is actually fun for me
to Loyal and all others
Eddy,
Good luck with the recovery and thanks for posting the trivia. I hope I was right in my answer. Hey....what the heck...it helps me learn.
Thanks again
#2 Jean Richer used a pendulum. For a given length, the period is dependent on gravity but independent of the weight.
My first thought was a weight and spring. In the back of my mind was the pendulum alhough I couldn't remember who did it. Wikipedia verified the pendulum.
survey trivia part trey
8 - It depends on the datum are you referring to? With NAD 83 is about 2.2 m, with New Zealand Geodetic Datum of 2000 it's in the range of 2-3 cm.
survey trivia part trey
wow, it's dave doyle. i met you one day in silver spring. one of your co workers, crescent snuck me in to get a look at the T4, you and ronnie taylor stopped over to say hello and tell a few stories. good to hear from you again
survey trivia part trey
> wow, it's dave doyle. i met you one day in silver spring.
Was he wearing his pointy geodesist hat?
survey trivia part trey
looked a little more like this...
really, this person's stage name is buckethead. fantastic guitar player. plays in c2b3 with les claypool, of primus fame, among other bands. rumor has it the opera mask is to hide the stagef right, and the kfc helmet is a statement about the genocide of chickens. he's a vegetarian. who knows what the truth is but he's a fantastic player nontheless
survey trivia part trey
VLBI is used primarily for quasars.
However, not necessarily intercontinental rat farts, but it has been used tectonic plate movements with milimeter accuracies - supposedly.
to Loyal and all others
Moe,
You are really sick. It's called geodosystictosis. But you are in luck. It can be cured with a local coordinate system flush.
Eddie-
I hope that your recovery is moving along well. Your post has brought back memories of one of my own hospitalizations in the past, and having similar thoughts plow through my mind. Looking back now, it was the morphine.
Get Well Soon!
10 what's the best type of GNSS data collection helmet? explain
a egyptian rebel mark I 
b james fleming special, with optional counterflow prevention valve 
c RP 
d recycled beach caramel corn 
d canine mini with UV blocker beer goggles 
e handheld directional 
f i don't need no tinfoil hat, i get the signal through my deltoids! 