The workshop is taught by Dr. Medeiros at University of Central Florida. IAHR student chapter at UCF
Пікірлер: 97
@flyinlo14746 жыл бұрын
Absolutely one of the most educational and well presented videos I have watched!! I like another viewer wished that the stuff in the field had been filmed :) I now have a MUCH better understanding on GPS and RTK in general. Thank you very much!!
@phaethongr6 жыл бұрын
Exceptional lecture, very well organized and keeping to the point. It's actually a lot easier to follow the entire lecture (almost 1.5 hours) than most people might think. Thanks a lot!
@PradeepSingh-bf9sh8 жыл бұрын
tastic teaching with top notch drawing and hand writing skills!Really happy that I stumbled on to this and now finally understand the GPS plus. Thanks Dr. Medeiros and University of Central Florida for sharing such well presented teaching that goes on there at your University
@JasonHagon18 жыл бұрын
The content was extremely well delivered. A highly informative video which answered many questions I had regarding the use of RTK systems.
@muvinq6 жыл бұрын
Wooow..am just 5mins into the video playback but i have understood something i have never learned/heard from anywhere/anybody in the past prior to this video. Is a well delivered class. Great job Dr. Medeiros. We need more of such videos
@joaquinfabrega7 жыл бұрын
In a few minutes I learned so much. Thanks and greetings from Panama, Central America
@metagleam9 жыл бұрын
Fantastic teaching with top notch drawing and hand writing skills!Really happy that I stumbled on to this and now finally understand the GPS plus. Thanks Dr. Medeiros and University of Central Florida for sharing such well presented teaching that goes on there at your University.
@daddymcsnacks_5617 жыл бұрын
I've been surveying for a few yrs now and I never quite knew how all this worked. This is rather interesting and loaded with good information!!! Thanks Doc!!
@lazybeastz1826 жыл бұрын
thats insane that 5 years working with something and still don't know how it works. I guess we are all lazy motherf*** on the inside.
@mohammedyosry88495 жыл бұрын
thank you very much, that was extremely helpful. hope to find another land surveying workshop videos very soon on this channel
@jeremywilson51432 жыл бұрын
I've been in surveying my whole career of about 20 years now and I've never felt like I've understood this stuff until right now, what an amazing display of intelligence and great explanation.
@imendramalik65874 жыл бұрын
Very well delivered talk on surveying. Very concise and to the point.
@raulgarcia84324 жыл бұрын
the best talk I have heard about gnss, congratulations, from mexico
@Benmeglei12 жыл бұрын
Awesome video. The guy teaching was excellent. Thank you to whoever posted this. 👊🏻
@esmseg15555 жыл бұрын
I was just listening and not looking at my screen and said to myself he sounds like S Medeiros. I used to work with you. Very informative video.
@benjauma12755 жыл бұрын
Very good lecture, and great overview of the GPS fundamentals.
@SaurabhKumar-gi4nr5 жыл бұрын
Thanks for the presentation. Very well explained & demonstrated.
@brianho66257 жыл бұрын
The material given from this video is practical enough for a civil engineer to do a simply topograhic survey by himself without the help from third party (saves plenty of time without the needs for setting out control points at remote area by total station) ±20mm horizontal and ±40mm vertical for RTK is sufficient for general purpose. Thank you for the lecture.
@daddymcsnacks_5617 жыл бұрын
Brian Ho what generally purpose could you be talking about? ground shots??
@benjauma12755 жыл бұрын
Engineers.... always thinking they can be surveyors too :P
@ovp2go5 жыл бұрын
Thank you very much for publishing this information. I am using Pix4D in conjunction with aerial photos taken with my drone to produce orthomosaics. I understand the process, but in the three courses I have taken, very little explanation is provided on how to obtain the GPS data.
@luisramos48202 жыл бұрын
YOU BEEN I BIG BLESSING TO ME. YOU HAVE A TALENT TO EXPLAIN AND TEACH SOMETHING SO HARD I A WAY THAT I UNDERSTAND IT. GOD BLESS YOU AND YOUR FAMILY AND CAREER.
@eloisademoraes63466 жыл бұрын
Thank you for the presentation. I enjoyed and learned quite bit.
@gtalckmin8 жыл бұрын
Wonderful! Thanks Dr. Medeiros
@brettmillar414410 ай бұрын
Thank you Dr. Great information and well put together.
@emmanuelochan8890 Жыл бұрын
I love the lecture, so much detailed and i am really pleasured to have the chance to watch it.
@GISandGenieCivil4 жыл бұрын
I have learned a lot from this lesson, thank you very much sir
@waltersiggelkow5053 жыл бұрын
Excellent intro to GNSS, thank you so much for sharing
@tumainiguest33344 жыл бұрын
Fantastic presentation. Simple but quite informative
@Engineersupply6 жыл бұрын
Very NICE video, very well done.
@remiglobal8 жыл бұрын
im only 5 minutes into this lecture and really loving it.
@Domzdream3 жыл бұрын
Jesus. I’m the opposite. I’m 5 mins and my eyes are about fall out of my head haha. But I do need to know this boring crap.
@coreywhite27988 жыл бұрын
This is very good and detailed presentation.
@MrFeretox8 жыл бұрын
great video, very helpful.
@davidtimothy4885 жыл бұрын
Extremely best lesson. boosts my knowledge as a surveyor in Kenya
@reaganlangoya57963 жыл бұрын
Hey bro how can we connect? I'm a Surveyor from Uaganda
@talalafzal7 жыл бұрын
Well delivered! Clarify many things specially in rtk I wish you filmed on field too Any how keep it up!
@unda254 жыл бұрын
which minutes
@dawodahibrahim69619 ай бұрын
This topic of land surveys is important for one to learn from this lecture.
@leebrian8 жыл бұрын
Can't thank you enough!
@przemyslaw5684 жыл бұрын
Very good presentation!
@ahmedmahdi78966 жыл бұрын
Thanks, Great Informations
@p.h.ariyawansa20458 жыл бұрын
Very useful for technical students
@GISandGenieCivil4 жыл бұрын
I hope sir that you could explain to us the static mode in GPS and how to observe points with static methods. Much appreciated.
@ialam19785 жыл бұрын
Nice and helpful lecture.
@usernamenotfounderror15117 жыл бұрын
This is what I need
@isaacalviter16646 жыл бұрын
Very good info.
@samimosmanrazu9943 жыл бұрын
Thanks, Watching from Bangladesh. It's very helpfull for us
@NathanAlo-sy1ls3 ай бұрын
Excellent presentation
@bigbosssauce7 Жыл бұрын
This is fantastic
@joshuaconstable63232 жыл бұрын
Great lecture
@tesfayesusyimenu32923 жыл бұрын
Superb!
@elmirmorroco3 жыл бұрын
THANK YOU
@dawodahibrahim6961 Жыл бұрын
this topic on land surveying is phenomenal by the lecturer who indeed understand land surveying and what it takes be one. i wish to have him as friend so things will be in other in surveying. but want him to tell me is it possible to plotts coordinate on Google earth pro. please keep me posted on lands surveying.
@creativerealinmind96614 жыл бұрын
Well delivered information. However, is it common in USA, answer the phone middle of session?55:04 Even it’s not silent mod lol
@AnareMotokula9 жыл бұрын
What do you mean when you say(1:09:47) you were able to " cut out a little piece of the geoid" for your project site? how do we create this localized area?
@lnv52385 жыл бұрын
if you downloaded the entire earth Geoid, your file may be too big to work with in your data collector. With software or online services through NGS you can create files that contain the Geoid information only for the area/region you are working in.
@tvlog874 жыл бұрын
nice well done
@wopmf4345FxFDxdGaa207 жыл бұрын
I think you can't know the distance of the device to the satellite just by listening one signal, because your device does not know the correct time. So to what would it be comparing that received pseudo random number at 10:00, it it doesn't know the correct time? I think it needs to receive more signals, to get the clock in he device corrected?
@aamirhashmi17107 жыл бұрын
what about carrier range?
@stargazer76445 жыл бұрын
Yeah, he kind of blew the gps explanation. He actually means pseudoranges. It is a range that only means something when compared to other pseudoranges. You could tell your distance to sat 12 is 1000 meters farther than to sat 14, but you don't know the actual absolute range. You have to have pseudoranges to (at least) 4 satellites in order to solve for the 4 unknowns of x,y,z and time. That's your position and time.
@israelkarity41166 жыл бұрын
13:35 "shift by 2 numbers can tell you the time difference" well how do you know if the shift is by 2 numbers or by ENTIRE_SEQUENCE+2numbers? or generally by N_TIMES*ENTIRE_SEQUENCE+2numbers?
@brunocalhiari9766 жыл бұрын
I believe it is first matched on the pseudo random number, then it goes down to the precision code ranging. I didnt search for this, it is just what makes sense for me.
@stargazer76445 жыл бұрын
Because the entire Precision PRN sequence is actually very, very long. It takes 266 days to send the whole sequence before it repeats, so there is no ambiguity. The C/A code is much shorter and repeats every millisecond.
@lazybeastz1826 жыл бұрын
so is this a class for free or can i sign up for this? btw the presenter looked a little nervous but i kinda understand now just need more confidence in his speech..
@josephsamali78494 жыл бұрын
A nice piece ,how can i have this software.GPSRTK cost .
@deadmeatpuppet6666 жыл бұрын
lol I have been surveying for 24 years . This was as exciting as watching snails mate . However it's informative if it's a beginners workshop . But I guess simple is best . I use the earl dudley network for my base and carlson DCs and BXR receivers . His explanation of grid to ground could use further explaining .
@aaphyss16362 жыл бұрын
Hi. Can you do a video for static method?
@armandobustilla77495 жыл бұрын
I am interested the workshop
@oh6235 Жыл бұрын
Where else can I find videos like these?
@marthaluciasalazarromero55667 жыл бұрын
que bueno seria traducción en español
@danielaelbaz3514 жыл бұрын
Very good perspiration, Thank you
@brucefay51263 жыл бұрын
Someone probably already made this comment, but cell phones do not get additional position data from a “WiFi” signal, they get that information from a cellular signal. They try to refine your position by determining your distance from the cellular tower you are connected to.
@reaganlangoya57963 жыл бұрын
Hey bro.im a land surveying student from Uaganda.How can we work together please
@phddon2 жыл бұрын
Yes, this is a good general overview of GPS fundamentals but the explanation of how RTK works is wrong. At around 48:00, he mentions that the base station transmits a "delta" so the rover can correct its coordinates. Actually, the base station transmits its raw carrier phase observations to the rover so it can process the relative vector from the base by double differencing.
@christiankarteyquarcoo28287 жыл бұрын
I think Chris is lecturing
@edgmworkgroup72962 жыл бұрын
The base position is not a known position at all. It's.just a constant position that can be used to process a relative position from the base to the rover.. 47:07.
@matrixugly4 жыл бұрын
24 flat earthers disliked this video
@agrimensor64067 жыл бұрын
GNSS is a generic term....we are using RTK for property surveys...
@jimrussey4 жыл бұрын
At 33:57 he states that (10123, 459344) shows 10,123 meters north and not east. Is this not (East, North) just like an (x,y)? He states the Northing first, and the Easting second.
@In_Rem6 жыл бұрын
speaking of measuring elevation, Why can I measure the elevation at sea level and I can measure the elevation of the mountain top and every foot in between but I can not measure the 8" per mile squared according to the pythagorean theorum of geometry and spheres for earth to be a spinning ball with a circumference of 24,901 miles let me tell you all why EARTH is FLAT
@stargazer76445 жыл бұрын
In Rem mainly because you're an idiot.
@willbondurant22763 жыл бұрын
i like how the students asked him questions to clarify how a gps reciever would know when the signal started in order to find the difference between the time when it was sent and the time it was recieved and he just kept pointing at his dumbass explanation on the board that displayed literally zero math and expected everyone to just nod their heads as if it was a sufficient explanation....
@abdirahmanyousuf95913 жыл бұрын
THIS IS ENOUGH ....
@lnv52385 жыл бұрын
Amazing crash course on GPS Surveying. What's with people and thinking they can just pick up their phone call in the middle of lecture? 55:05. Learn how to respect, lady.
@DavidS-xg7il7 жыл бұрын
The explanation for how the RTK solution is derived is completely false.
@JuanCarlosMH7 жыл бұрын
Could you elaborate or share a correct explanation :)
@DavidS-xg7il7 жыл бұрын
+Juan Carlos Montes Herrera It's kind of complicated but the short version is. You have two GPS receivers on the ground, and they receive signal from the same satellite vehicles, however many that is. So you have vectors going from the ground receivers to the Sv's. You then take the difference of the difference (double difference) of these vectors and the resultant is a 3 dimensional vector between the receivers. Since we know the location of the base we can place the tail of the vector on the known point and the tip of the vector is the location of the Rover. This entire process is calculated in real-time by the processor in the receiver. the information transmitted by the base is simply the GPS information it receives.
@JuanCarlosMH7 жыл бұрын
Excellent, thank you very much!
@stephenmedeiros69117 жыл бұрын
Thank you for the clarification, I will be sure to update the material in future lectures.
@johntomaszewski960210 ай бұрын
This video needs some corrections. At 1:30 he says "...maintained by the United States Air Force". The GPS constellation is both maintained and operated by the United States Air Force. Kinda Nit-picking? Well lets go on... At 1:45 he mentions "27 GPS satellites" (space vehicles); there are actually more than that in orbit, and the constellation performance requirements are based on a constellation of 24 available space vehicles, not 27. At 1:57 he says ..."wherever you're standing each satellite will pass over your head twice in a day", and at 2:30 he draws a depiction of GPS orbits and mentions "orbital planes". One of the planes he draws is a polar orbit. Be advised that the inclination for ALL of the GPS space vehicle orbits is the same, and it is 55 degrees. Importantly: between 55 deg north latitude and the north pole and 55 deg south latitude and the south pole NO GPS space vehicles ever pass overhead. Thus precision of GPS solutions for users in those latitudes degrades as they get closer to each respective pole. All you have to do is Google "GPS orbit inclination" to confirm that. Given 3+ strikes in less than 3 minutes, and you can Google to get more reliable information: I'm not wasting any more time watching this.
@pickingrinin17343 жыл бұрын
Only could watch for 2 minutes. Extremely poor audio.
@stargazer76445 жыл бұрын
This is a terrible explanation of how gps works.
@PimpBeetle1384 жыл бұрын
I'd expect better from a university.
@magnusqwerty3 жыл бұрын
This lecture goes veeeery sloowly and is very primitive.