These videos are great, thank you for making them. Looking forward to the OPUS one because all these "known points" for base stations need to come from somewhere!
Thanks for the great explanation. I dunno why, but it just feels good to watch someone I don't know use the same workflow. Anyway, I've been using a pair of RS2s for about 2 years and am, like you, impressed by their performance. Subscribed!
Thank you much, Using PPK really helps because the NSRS points i have access to are out in the meddle of nowhere and people have had their bases get stolen. The secure locations typically have their LOS obstructed to where i need the rover to be. This will help a great deal, its so handy to have someone step though it for a sanity check.
That's interesting to watch but there's something to keep in mind: RTK measures are not a reference to check same PPK measures precision. Both types of measures are using the same calculations, the only difference is when it happens (Real Time or Post Process). In the end, you did not find an error, but just a difference between 2 same measures.
Rami, I’m just starting out in drone mapping and I really enjoy your videos. I have much to learn, especially with using GNS devices. I would be grateful foar an answer to a question. When using ground control points what is the process when you don’t have a known point? Thanks!
thanks for the tutorial! I did exactly what you did with one exception. apparently one of my settings was different because I ended up with decimal degrees in my corrected file instead of lat/long. For some unknown reason that wont work in the software I'm using but Lat/long/and ellipsoidal in meters does
Hi Rami, thanks for taking the time to do this video, it saved me hours of trial and error. 1 question I have from your video: I do surveys in very remote areas in Africa where I have no known point for my base coordinates and no internet. How would you aproach this? should I just do a Point Averaging and use those coordinates for the base? Or not bother to fill in the base coordinates? Thanks a lot, love your channel
Hey Rami, my corrected CSV is missing northing and easting. Is that normal. I did a manual entry on the point and gave it coordinates for my project that was in state plane.
Great video! Thanks for it. My questions: 1. Do you need to know the absolute position of the base station before hand (x, y and z) or you can place it anywhere? 2. Do you need to place the base station at the same position for subsequent measurements?
So my only comment on this is your setup of the base. You had it set to kinematic mode. Which is fine for the rover. But you will see greater accuracy on the base with it set to static. Since it's not moving, the corrections will be able to know for sure that the 'movement' it calculates is wrong, and can more easily filter it out.
Hey Rami, great vid. I know how much a pain it is to shoot these yourself. Had a question about logging the Base, you showed to log the base as a kinematic solution b/c the rover is moving... I thought, you'd want the base in static and the rover itself in kinematic.
Good question, this could be an entire lecture but I’ll try my best to explain it. Static observation only allows for a single receiver solution since we are logging data to achieve one position. Whereas kinematic observations are understood to be a dual receiver solution. Even through the base is stationary, it is known to be used for corrections, so we don’t need the additional utilities to have a static solution.
emlid explains on his’web site that the set up of the base is in kinematic in we work With the rs2+. I thought it was a mistake because with rs+ I usually put the base in static
Great video! How would you deal with a situation in which you have no access to a 'known' point to set the base over, however? Assuming there's no NTRIP, internet nor a CORS network anywhere near. Obviously you could create a high absolute accuracy known point by logging and processing 12-24 hours worth of raw data. But this is obviously far from ideal nor practical during a project. Would you, for example, suggest to log the base location for a shorter period of time (1-2 hours) and therefore accept a reduced absolute accuracy instead (relative accuracy between base and rover should still be in the cm-range, correct)? Or would you for example input a 0,0,0 for the base's long/lat/height (or XYZ resp.) to create a local reference network for the rover instead. Assuming you'd set the base over the exact same point during future projects and provide with the same 0,0,0 base coordinates you'd expect to be able to create a relative accuracy between different data acquisition rounds in the order of a few centimeters too, right?
What do you do if you don't know the base station coordinates? Say you set up base for first time and want to collect data with rover while base is cooking.
Hey Rami, do you know if a CORS or a NTRIP connection are needed to operate the Emlid units for drone surveying? i live in a country that does not have access to these connections, but the company i am working with is interested in getting into drone surveying with the highest accuracy possible.
When logging ROVER data, should the rover be standing on the point of observation? You have taken 3 points and the rover continued to Log the data, how is that? I am bit confused :s anyboyd could clarify? THNX!
I have seen in some videos, where they say to stay at the same position for 15+ minutes, but you just stay like 30 second on each point, could you pls expalin it why is it so?
hello tamimi, great video!! I would like to know if it will be able to connect the emlid base and rover with the carlson survpc software. Will he be able to try the emlid caster connection as well? thanks and greetings from Italy
I have the Reach RS+ and I'm using the same Emlid Flow App but somehow the settings look different. I assume its because the GNSS receivers are different. Correct?
Hi Rami. And if you have to stake put the points, whats thw procces? do you manully input a corrected coordinate from a previous point, put the base there and stake put other points with the rover?
Thank you for the post, this has been really helpful. I've been getting an issue with the post processing in emlid studio, however. It says that I only have 0.2% fixed solutions, and 90+% float from my rover. The points cannot be corrected using fix since there is not enough fixed points. do you know what may be causing that issue?
Other than the obvious view of the sky, you can get very different results processing forwards, backwards and combined. I assume you did this forward, try backwards.
why if u did not have the coordinates of the base? do u place it over the point, log raw data, post proceed, and then u cant correct de points collected by the rover?
There's something I still don't understand about PPK. When you captured the 3 points, you collected them for 10 seconds each. Are 10 seconds related to the proximity to the base? Is there a rule on how long I should manage each point depending on the distance between base and rover?
Stupid question about emlid studio, is there any reason to set the base to static or kinematic when doing ppk or rtk? Obvious on the rover, but I've seen people set the base both ways.
How accurate could I expect points to be, if I corrected float points? Sometimes I can't get a fix, and I was hoping that with PPK or PPP and float points, that I could at least ensure that my points were sub-meter, or maybe even sub-foot. Which is good enough for wetland flags........Thoughts?
Hey Rami, thank you for the tutorial, it’s super helpful since I have a lot of trouble doing RTK while in the field, however I haven’t been able to average out any points when I process the data with the csv file, any chance you could help me with it? I don’t think it’s a conflict in times since both files should be within the same time frame
Hi Rami, thanks for your video. If I am understanding. We have two options to make PPK. The first, is when we place the base in a unknown point, in this case, we configured the base in STATIC and CORRECTION OUTPUT ON, and 5hz. The rover, we configured in KINEMATIC, and CORRECTION OUTPUT OFF, AND CORRECTION INPUT ON. Right now I have saw your video, I know a new way to PPK but WIHT A KNOWN BASE, only for compare with RTK. Is it correct?? I am a little confused in post process with Emlid Studio. When I make PPK with an unknown base, I post process as rover my base logs, and as base my cors logs (previously download), in static mode, and I obtain an unique point (my base) corrected. Finally, I go to Stop ang go and correct the others points. But, make sense process only my base in unknown point wiht my rover?? It is right?? Thanks. Regards from Panama.
hola ingeniero Rami Tamimi, excelente video, acá en mi país mexico así es como realizamos el tipo de trabajo para la colocación de estaciones de control y líneas base, gracias por compartir sus conocimientos
How do you proceed with PPK process if you don’t have a known point over which to set the base? Does this mean you can only achieve cm level accuracy relative to the base but inaccurate relative to the actual ground? Or is there an easy way to create an accurate known point in the field to then set the base over?
I think I've answered this question for myself, Precise Point Positioning (PPP). I'm speaking hypothetically here about working in a remote location with no network connection, and no known point over which to setup the base. How can you establish an accurate known point to set the base over so that you can then proceed with your PPK survey and achieve absolute rather than relative accuracy? This link docs.emlid.com/reach/quickstart/ppp-logging/ explains how to record logs for Precise Point Positioning (PPP) and download them from Reach for working with your data in the PPP service such as NrCan CSRS-PPP service: webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/tools-outils/ppp.php To measure a PPP, you have to let the base log for several hours, at least 4, maybe as much as 24, but if there is no other 'known point' alternative and relative accuracy won't cut it, this is an option.
Looks like i'll be using this equipment in the next week or so. Is there a way to set up the base with no known coordinate (like Trimble's 'HERE' softkey positioning), then applying a site calibration using a BM to your job? TIA. Great video BTW.
Yes there is. I always encourage people to use a known point since it will always give a more accurate correction, but there is an option to do it with no known coordinates.
@@RamiTamimi Do you have a vid where you show your RTCM settings for the other freqs? Edit, sorry I mean frequencies for the other systems (GLONASS, etc..). I havnt had coffee yet.
Hi Rami, great video (best out there explaining the PPK). I only have one question. Can i use the ppk solution only having only a rover logging raw data? The corrections will be taken by buying the rinex file from the company i use for my cors. Thanks
Buy CORS corrections, to get a fixed position on your rover. Then start logging data that's already corrected not the other way around. You can reprocess your raw data with a high accuracy CORS for slightly better positioning but it's overkill.
I HAVE A QUESTION, HERE IN MEXICO WE USE OUR BASE RINEX AND INEGI (OUR NATIONAL GEODETIC NETWORK) RINEX FOR THE POST-PROCESSING, WHIT THIS PROGRAM AM I NO LONGER NEED THE INEGI RINEX? JUST THE ROVER AND BASE?
Great video. Got a question for you.. I’m a drone data collection remote pilot, The company I work for wanted me to get a heap of random gcp over an area where we were doing lidar and photogrammetry. We used a topcon base and rover. My question is that topcon says to measure the length of one of the legs of the tripod to the base rather than the vertical height like you have. How would this work out it’s height? Over a known permanent survey marker? One leg could be sitting 1m underwater for all it knows. Have you seen this before?
@@RamiTamimi that was my thoughts as well. In the end they sent us the incorrect settings and didn’t have line of sight to the base so couldn’t collect any points.
If you measure the length of a tripod leg and then apply Pythagoras, you will get the height of the tripod baseplate, but not the required antenna height. I would never do that. I keep a 2-metre dressmaker's tape with me to measure the antenna height directly if I need to [the antenna plane is usually marked on most units]. For field work, I have a tripod for the base station and a telescopic monopod for the rover, and I have their heights permanently entered into their respective GPS units. I long ago gave up using a surveyor's bipod; they are much too unwieldy in field situations.
@@kizzjd9578 Sure is. It makes no sense to me. Either measure it directly with a tape or have the heights of base and rover permanently encoded in your GPS units.
Between the RTK corrected #s and the PPK corrected #s, do we know for certain WHICH are more accurate? I'm a noob but am reading that PPK results are generally more precise than RTK when both are done correctly. Is this true? Thank you Professor!
Generally speaking, PPK is considered to have a higher accuracy because we have full control of the corrections. Now that’s not to say that RTK isn’t accurate, if a shot is fixed and has lower standard deviations, then it can be accepted as a baseline measurement to compare other measurements to it, just like we did here in this video.
Hi I am from somalia so I would like to ask you question about surveyor special in offic work The question that I have is What is the difference between Orginal Coordinates and rotated Coordinates(Axis points) and How much degree I can Rotated the Axis coordinates? Thankfully I hop to instruduce that answer thank you somuch for you Benefits Channel
I am looking to take measurements on a property without a known point or anywhere close to one i could use. Very remote property no cell signal. How would i go about getting a base station point.
Rami has been showing a base station set up on a known benchmark. I work in remote Australia where there are no benchmarks, no CORS, no internet and no cell towers, so I set up the base station and let it run for 30 minutes or so, after which it has a SINGLE solution of better than 1 centimetre, which means the rover will show a FIX solution of similar accuracy. This also works for PPK. The RS2 is a multi-frequency unit and is much faster at this than the older Reach RS.
@@mjmcb1 does it say what the accuracy is on the device? If you left it in one place for several hours this could yeild better accuracy? If i could get accuracy within 30cm that would be awesome.
@@nickalex636 I wouldn't consider 30 cm acceptable. My usual RTK FIX Accuracy is 0.5 centimetres. I recently wanted to demonstrate how RTK worked to someone who was having difficulty understanding it. I set up the base station and let it run for a minimum 20 minutes. On the rover I set up a survey, with a defined acceptable accuracy for surveyed points [0.5 cm, 1 cm, 2 cm, etc.], and the rover showed how long it will typically take to achieve that accuracy with RTK SINGLE, FLOAT, or FIX. The answer is usually 20 minutes, 10 minutes, or 30 seconds respectively. So, if you are willing to dwell on a point for 20 minutes with a single GPS rover, you can get centimetre accuracy. But only 30 seconds for an RTK FIX, using a pair of Emlid RS units. For surveying, as in most things, time is money.
@@mjmcb1 makes sense especially if you have to take multiple points. Currently i am using garmin handheld but accuracy is not so great. Around 3 meters at best. Looking into options without spending 10 grand.
Hi Im from India, According to you which company gives better solutions in RTK Range whether its in deep forest or in crowded town :- 1)Trimble , 2)Pentax or 3) Laica ??
Hey Rami, what if we don't have a known point? Can we use the base log for PPP and input that result in the base lat/long/elev input in the PPK studio? Would that be enough to successfully shift all the rover points after PPK processing?
@@PortraitArtPhoto123 What do you mean? PPP gives marker elevation (ARP-Antenna height which is entered in the header), do you input ARP or marker elevation in studio?
These videos are great, thank you for making them.
Looking forward to the OPUS one because all these "known points" for base stations need to come from somewhere!
تحياتي أخي تميمي من أرض المليون و نصف المليون شهيد..بالتوفيق إن شاء الله
Thanks for the great explanation. I dunno why, but it just feels good to watch someone I don't know use the same workflow. Anyway, I've been using a pair of RS2s for about 2 years and am, like you, impressed by their performance. Subscribed!
hola, que pasa si no tienes un punto conocido?
This was SO MUCH BETTER than the Emlid documentation. Saved me! Thanks a bunch Rami!
Best PPK tutorial on RUclips
Thanks David!!!
Thank you much, Using PPK really helps because the NSRS points i have access to are out in the meddle of nowhere and people have had their bases get stolen. The secure locations typically have their LOS obstructed to where i need the rover to be. This will help a great deal, its so handy to have someone step though it for a sanity check.
Rami, thanks so much for putting this tutorial together. It was extremely helpful in getting my Emlid data post processed. Cheers!
Good explanation. I grew up a few miles from your location
Rami, you ROCK! Thank you!!!
Finally an explanation that makes sense
Super explanation. I've been searching for a video tutorial using Emlid Studio for months now and this is the best I've seen. Thanks much
Thank you Rami, keep posting useful videos
Great job Rami 👍
I find this video very helpful. Thank you for putting this out.
Godspeed Rami great video!
Great video Prof. Rami..
Much appreciated
absolutely i like your lessons from Somalia
Great video. Thanks
That's interesting to watch but there's something to keep in mind: RTK measures are not a reference to check same PPK measures precision. Both types of measures are using the same calculations, the only difference is when it happens (Real Time or Post Process). In the end, you did not find an error, but just a difference between 2 same measures.
Rami, I’m just starting out in drone mapping and I really enjoy your videos. I have much to learn, especially with using GNS devices. I would be grateful foar an answer to a question. When using ground control points what is the process when you don’t have a known point? Thanks!
Please do a PPK tutorial with Hi Target
Great video Rami. It would be great if you could explain in a video the whole PPK workflow with the new Mavic 3E. Thanks you
I love your programme. Thank you bro
thanks for the tutorial! I did exactly what you did with one exception. apparently one of my settings was different because I ended up with decimal degrees in my corrected file instead of lat/long. For some unknown reason that wont work in the software I'm using but Lat/long/and ellipsoidal in meters does
nice video my friend im from timor leste..........last time i do comparison elevation between autolevel and emlid rs+ and we have nice result tooo.
Hi Rami, thanks for taking the time to do this video, it saved me hours of trial and error. 1 question I have from your video: I do surveys in very remote areas in Africa where I have no known point for my base coordinates and no internet. How would you aproach this?
should I just do a Point Averaging and use those coordinates for the base? Or not bother to fill in the base coordinates?
Thanks a lot, love your channel
Very informative...thank you for sharing
Glad it was helpful!
Genial saludos cordiales desde Patagonia Chile
Great videa Rami, Thank you very much for your work, thumb up from Chian LoL
China
Very helpful! You are a star!
Hey Rami, my corrected CSV is missing northing and easting. Is that normal. I did a manual entry on the point and gave it coordinates for my project that was in state plane.
Great video! Thanks for it.
My questions:
1. Do you need to know the absolute position of the base station before hand (x, y and z) or you can place it anywhere?
2. Do you need to place the base station at the same position for subsequent measurements?
Thank you, well presented , very informative.
This was great
So my only comment on this is your setup of the base. You had it set to kinematic mode. Which is fine for the rover. But you will see greater accuracy on the base with it set to static. Since it's not moving, the corrections will be able to know for sure that the 'movement' it calculates is wrong, and can more easily filter it out.
Hey Rami, great vid. I know how much a pain it is to shoot these yourself. Had a question about logging the Base, you showed to log the base as a kinematic solution b/c the rover is moving... I thought, you'd want the base in static and the rover itself in kinematic.
Good question, this could be an entire lecture but I’ll try my best to explain it. Static observation only allows for a single receiver solution since we are logging data to achieve one position. Whereas kinematic observations are understood to be a dual receiver solution. Even through the base is stationary, it is known to be used for corrections, so we don’t need the additional utilities to have a static solution.
@@RamiTamimi, so the set up of the base is always in kinematic whether we work in RTK or PPK, is that right?
emlid explains on his’web site that the set up of the base is in kinematic in we work With the rs2+. I thought it was a mistake because with rs+ I usually put the base in static
thank you so much... very informative & understood very well... thank you
Excellent!
Hello from Iraq Great video
Thank you
at 6:30 why havent u started Position and Base Correction recording? When is it useful?
How long should we wait at a point to take the measurement? I mean after pressing measure button, how long should be the measure interval?
Great video! How would you deal with a situation in which you have no access to a 'known' point to set the base over, however? Assuming there's no NTRIP, internet nor a CORS network anywhere near.
Obviously you could create a high absolute accuracy known point by logging and processing 12-24 hours worth of raw data. But this is obviously far from ideal nor practical during a project.
Would you, for example, suggest to log the base location for a shorter period of time (1-2 hours) and therefore accept a reduced absolute accuracy instead (relative accuracy between base and rover should still be in the cm-range, correct)? Or would you for example input a 0,0,0 for the base's long/lat/height (or XYZ resp.) to create a local reference network for the rover instead. Assuming you'd set the base over the exact same point during future projects and provide with the same 0,0,0 base coordinates you'd expect to be able to create a relative accuracy between different data acquisition rounds in the order of a few centimeters too, right?
Thank you very much!
Great video! What if you don't have a known point for your base station?
Waiting 👍
Thanks man
Waiting..👍
Good job.
What do you do if you don't know the base station coordinates? Say you set up base for first time and want to collect data with rover while base is cooking.
Waiting..✨
Hey Rami, do you know if a CORS or a NTRIP connection are needed to operate the Emlid units for drone surveying? i live in a country that does not have access to these connections, but the company i am working with is interested in getting into drone surveying with the highest accuracy possible.
Please, would you explain, why for the base, you set up the height two times ?
Do you need an Internet connection to use the Emild reviver with this PPk process/
Accuracy level
When logging ROVER data, should the rover be standing on the point of observation? You have taken 3 points and the rover continued to Log the data, how is that? I am bit confused :s anyboyd could clarify? THNX!
I have seen in some videos, where they say to stay at the same position for 15+ minutes, but you just stay like 30 second on each point, could you pls expalin it why is it so?
im from Indonesian, and i have a question, how about to be serveyor on your country? isn't hard or anything you can explain, thank you ❤️
Can i work in usa with technicien land surveyor diploma in algerian?
You'll need a work visa. If you have one then yes, there are so many surveying jobs in America.
Hi. Can you do a video on static observation. Thanks.
hello tamimi, great video!! I would like to know if it will be able to connect the emlid base and rover with the carlson survpc software. Will he be able to try the emlid caster connection as well? thanks and greetings from Italy
Where is the OPUS video you mention?
Hello!! is there a way i could get the sample files??? I'm interested in the CSV format so i can use some other software, like SW Maps
FROM MEXICO VERY GOOD VIDEO COULD YOU GIVE YOUR OPINION OF THE DJI L1 LIDAR SENSORS
I have the Reach RS+ and I'm using the same Emlid Flow App but somehow the settings look different. I assume its because the GNSS receivers are different. Correct?
How does observation time come into play?
Thanks so much for the great content. So what if you don't have a known point? Does this work with relative coordinates?
Hi Rami. And if you have to stake put the points, whats thw procces? do you manully input a corrected coordinate from a previous point, put the base there and stake put other points with the rover?
Im interested in knowing if the emlid has COGO tools
Thank you for the post, this has been really helpful. I've been getting an issue with the post processing in emlid studio, however. It says that I only have 0.2% fixed solutions, and 90+% float from my rover. The points cannot be corrected using fix since there is not enough fixed points. do you know what may be causing that issue?
Other than the obvious view of the sky, you can get very different results processing forwards, backwards and combined. I assume you did this forward, try backwards.
why if u did not have the coordinates of the base? do u place it over the point, log raw data, post proceed, and then u cant correct de points collected by the rover?
There's something I still don't understand about PPK. When you captured the 3 points, you collected them for 10 seconds each. Are 10 seconds related to the proximity to the base? Is there a rule on how long I should manage each point depending on the distance between base and rover?
Why compare rtk vs ppk, against each other and not a know point. Which one is more accurate? The results don't really show anything
Disculpe Dr.Rami debo entender es única opción partir de un punto conocido, ó posprocesado?
Heck ya dude😎
hola Rami, que pasa si no tienes un punto conocido?
Thanks for this video and hello to all! Can somebody explain me how the base can correct the rover if they are not connected to each other?
Para saber si recibes correcciones lo puedes ver en la barra de estado del rover
Can I use this when the base and the rover are separated by about 2 km?
Thank sir for your time and your lesson
Please sir I have GNSS base station and I want to connect it with my drone Mavic 3e
Please sir help me out
Stupid question about emlid studio, is there any reason to set the base to static or kinematic when doing ppk or rtk? Obvious on the rover, but I've seen people set the base both ways.
How accurate could I expect points to be, if I corrected float points? Sometimes I can't get a fix, and I was hoping that with PPK or PPP and float points, that I could at least ensure that my points were sub-meter, or maybe even sub-foot. Which is good enough for wetland flags........Thoughts?
Hey Rami, thank you for the tutorial, it’s super helpful since I have a lot of trouble doing RTK while in the field, however I haven’t been able to average out any points when I process the data with the csv file, any chance you could help me with it? I don’t think it’s a conflict in times since both files should be within the same time frame
Hi Rami, thanks for your video. If I am understanding. We have two options to make PPK. The first, is when we place the base in a unknown point, in this case, we configured the base in STATIC and CORRECTION OUTPUT ON, and 5hz. The rover, we configured in KINEMATIC, and CORRECTION OUTPUT OFF, AND CORRECTION INPUT ON. Right now I have saw your video, I know a new way to PPK but WIHT A KNOWN BASE, only for compare with RTK.
Is it correct??
I am a little confused in post process with Emlid Studio.
When I make PPK with an unknown base, I post process as rover my base logs, and as base my cors logs (previously download), in static mode, and I obtain an unique point (my base) corrected. Finally, I go to Stop ang go and correct the others points.
But, make sense process only my base in unknown point wiht my rover?? It is right??
Thanks.
Regards from Panama.
Rami, the rover have update rate in 5 hz, and the base in 1 hz. It to ppk when my base is in a unknown point.
Why did you set the base station to kinematic instead of static?
hola ingeniero Rami Tamimi, excelente video, acá en mi país mexico así es como realizamos el tipo de trabajo para la colocación de estaciones de control y líneas base, gracias por compartir sus conocimientos
Las dos antenas se ponen en modo Kinematic?
Saludos
@@loganvsa23
@@maps_ingenieria en kinematic?
How do you proceed with PPK process if you don’t have a known point over which to set the base? Does this mean you can only achieve cm level accuracy relative to the base but inaccurate relative to the actual ground? Or is there an easy way to create an accurate known point in the field to then set the base over?
I think I've answered this question for myself, Precise Point Positioning (PPP). I'm speaking hypothetically here about working in a remote location with no network connection, and no known point over which to setup the base. How can you establish an accurate known point to set the base over so that you can then proceed with your PPK survey and achieve absolute rather than relative accuracy? This link docs.emlid.com/reach/quickstart/ppp-logging/ explains how to record logs for Precise Point Positioning (PPP) and download them from Reach for working with your data in the PPP service such as NrCan CSRS-PPP service: webapp.csrs-scrs.nrcan-rncan.gc.ca/geod/tools-outils/ppp.php To measure a PPP, you have to let the base log for several hours, at least 4, maybe as much as 24, but if there is no other 'known point' alternative and relative accuracy won't cut it, this is an option.
Looks like i'll be using this equipment in the next week or so. Is there a way to set up the base with no known coordinate (like Trimble's 'HERE' softkey positioning), then applying a site calibration using a BM to your job? TIA. Great video BTW.
Yes there is. I always encourage people to use a known point since it will always give a more accurate correction, but there is an option to do it with no known coordinates.
@@RamiTamimi Do you have a vid where you show your RTCM settings for the other freqs? Edit, sorry I mean frequencies for the other systems (GLONASS, etc..). I havnt had coffee yet.
Hi Rami, great video (best out there explaining the PPK). I only have one question. Can i use the ppk solution only having only a rover logging raw data? The corrections will be taken by buying the rinex file from the company i use for my cors. Thanks
Buy CORS corrections, to get a fixed position on your rover. Then start logging data that's already corrected not the other way around. You can reprocess your raw data with a high accuracy CORS for slightly better positioning but it's overkill.
Do you need both a base and a rover? Or can you run just a rover?
What is Elipsoid height?
I HAVE A QUESTION, HERE IN MEXICO WE USE OUR BASE RINEX AND INEGI (OUR NATIONAL GEODETIC NETWORK) RINEX FOR THE POST-PROCESSING, WHIT THIS PROGRAM AM I NO LONGER NEED THE INEGI RINEX? JUST THE ROVER AND BASE?
You will need the RINEX as this is the logging file that is going to sync the times data was being collecting by both the rover and the base
@@RamiTamimi CAN IT BE IN SINGLE MODE? IF I PUT MY BASE IN A UNKNOW POINT, AND FOLLOWING THE STEPS OF THIS VIDEO, CAN I I DO THE POST-PROCESSING?
Great video. Got a question for you.. I’m a drone data collection remote pilot, The company I work for wanted me to get a heap of random gcp over an area where we were doing lidar and photogrammetry.
We used a topcon base and rover.
My question is that topcon says to measure the length of one of the legs of the tripod to the base rather than the vertical height like you have. How would this work out it’s height? Over a known permanent survey marker?
One leg could be sitting 1m underwater for all it knows. Have you seen this before?
I honestly never heard of this. The instrument height is always the shortest point from the bottom of the device to the point it is occupying.
@@RamiTamimi that was my thoughts as well. In the end they sent us the incorrect settings and didn’t have line of sight to the base so couldn’t collect any points.
If you measure the length of a tripod leg and then apply Pythagoras, you will get the height of the tripod baseplate, but not the required antenna height. I would never do that. I keep a 2-metre dressmaker's tape with me to measure the antenna height directly if I need to [the antenna plane is usually marked on most units]. For field work, I have a tripod for the base station and a telescopic monopod for the rover, and I have their heights permanently entered into their respective GPS units. I long ago gave up using a surveyor's bipod; they are much too unwieldy in field situations.
@@mjmcb1 ok, seems like a hassle to use Pythagoras when i could’ve just plumbed a measurement down.
@@kizzjd9578 Sure is. It makes no sense to me. Either measure it directly with a tape or have the heights of base and rover permanently encoded in your GPS units.
Between the RTK corrected #s and the PPK corrected #s, do we know for certain WHICH are more accurate? I'm a noob but am reading that PPK results are generally more precise than RTK when both are done correctly. Is this true? Thank you Professor!
Generally speaking, PPK is considered to have a higher accuracy because we have full control of the corrections. Now that’s not to say that RTK isn’t accurate, if a shot is fixed and has lower standard deviations, then it can be accepted as a baseline measurement to compare other measurements to it, just like we did here in this video.
Hi I am from somalia so I would like to ask you question about surveyor special in offic work The question that I have is What is the difference between Orginal Coordinates and rotated Coordinates(Axis points) and How much degree I can Rotated the Axis coordinates? Thankfully I hop to instruduce that answer thank you somuch for you Benefits Channel
Rami, what is the app that you are using on your cellphone???.
Thanks for your answer.
God Bless you.
It is called Reachview 3
I am looking to take measurements on a property without a known point or anywhere close to one i could use. Very remote property no cell signal. How would i go about getting a base station point.
You would need to establish a static observation. Something I will cover in the future.
Rami has been showing a base station set up on a known benchmark. I work in remote Australia where there are no benchmarks, no CORS, no internet and no cell towers, so I set up the base station and let it run for 30 minutes or so, after which it has a SINGLE solution of better than 1 centimetre, which means the rover will show a FIX solution of similar accuracy. This also works for PPK. The RS2 is a multi-frequency unit and is much faster at this than the older Reach RS.
@@mjmcb1 does it say what the accuracy is on the device? If you left it in one place for several hours this could yeild better accuracy? If i could get accuracy within 30cm that would be awesome.
@@nickalex636 I wouldn't consider 30 cm acceptable. My usual RTK FIX Accuracy is 0.5 centimetres. I recently wanted to demonstrate how RTK worked to someone who was having difficulty understanding it. I set up the base station and let it run for a minimum 20 minutes. On the rover I set up a survey, with a defined acceptable accuracy for surveyed points [0.5 cm, 1 cm, 2 cm, etc.], and the rover showed how long it will typically take to achieve that accuracy with RTK SINGLE, FLOAT, or FIX. The answer is usually 20 minutes, 10 minutes, or 30 seconds respectively. So, if you are willing to dwell on a point for 20 minutes with a single GPS rover, you can get centimetre accuracy. But only 30 seconds for an RTK FIX, using a pair of Emlid RS units. For surveying, as in most things, time is money.
@@mjmcb1 makes sense especially if you have to take multiple points. Currently i am using garmin handheld but accuracy is not so great. Around 3 meters at best. Looking into options without spending 10 grand.
Hi Im from India,
According to you which company gives better solutions in RTK Range whether its in deep forest or in crowded town :-
1)Trimble , 2)Pentax or 3) Laica ??
The one that has the most channels.
Please sir the base station name is chcnav
Is it possible to use the cors station in PPK with RS2?
Yes, provided it is not too far away. Less than 30 kilometres is best.
Hello sir,
Height of PPK is ellipsoid height or Geoid ? Please Describe plz
Any GNSS regardless of solution captures vertical data in ellipsoid height
Hey Rami, what if we don't have a known point? Can we use the base log for PPP and input that result in the base lat/long/elev input in the PPK studio? Would that be enough to successfully shift all the rover points after PPK processing?
Yup, I do this a fair bit with ppk flights. Just make sure you manually enter it instead of reading from the header when processing.
@@PortraitArtPhoto123 What do you mean? PPP gives marker elevation (ARP-Antenna height which is entered in the header), do you input ARP or marker elevation in studio?