Incorrect base line length using RTK settings

Reach RS2 / RS2+ RTK / PPK configuration
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Screenshot_2020-07-25-20-08-30
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Screenshot_2020-07-25-20-08-47
Screenshot_2020-07-25-20-08-471080×1920 182 KB

I am trying do a RTK survey using Reach RS2 Rover and Base receivers using LoRa antenna.

I have been following the exact steps mentioned in the tutorial documentation for setting this up.

However, as you could see in the attached jpeg files, I am getting large base line values (5,798.575 km). Note that the Rover and Receiver are a 10 m apart and still getting this large baseline value.

I would be grateful if someone can advise me whether I am doing something wrong with the RTK setting or not.

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If you have all the setting correct (lora setting identical), restarting both units has worked for me

3

Thanks a lot Dave. As you suggested when I restarted both receivers and thetablet, I am getting the correct baseline length. I did a physical measurement of base line length using measuring tape and is damn accurate.

1 Like
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You will see this correlation only over short baselines otherwise you will have to do a ground to grid conversion to make the two the same. You probably already know this but just thought I would mention it anyways just in case.

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This happened to me as well a few times, like Dave said a simple restart usually does the trick.

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So i have an RS2 and M2 running the DEV FW. The RS2 is on NTRIP and fixed with a baseline of 3.11m. The M2 is connected to the RS2 via LORA and its baseline is 8406.967 km. Ive tried to reboot multiple times and it still remains. Thoughts?

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did you setup the base function in the RS2 with average fix? I haven’t tested what you are doing but I NTRIP to my states CORS network and get my base location on average fix for two minutes. After fix for 2 mins, it starts transmitting corrections via Lora. My baseline was less than 1m as they were right next to one another.

I am running the same firmware.

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NTRIP to the RS2, RS2 via LoRA to the M2.

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Hi Seth,

Could you please send me the raw data, solution and correction logs from your M2? You can upload them to any file transfer service or send them onto the support@emlid.com.

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