where is poor gnss data?

[yuxudong20]

hello, i've downloaded your HK Dataset. Thanks for your work. According to your introduction, HK-Data20190426-1、HK-Data20190316-2、HK-Data20190316-1 are with poor gnss visibilities. But i read gnss data with good quality from topic /navsat/fix, as shown in the second figure. I need raw gnss data with outliers or bad signals. So i want to ask if i chose the wrong topic and where can i get poor gnss data? Thank you.

[weisongwen]

Hi, Thanks for your interest. Sorry for the delay, we try our best to reply to the issues every several days,

We only provide the raw GNSS data via rostopic "/GNSS_" in the HK dataset. The data you use (/navsat/fix) is the ground truth pose from SPAN-CPT.

1. If you want to use raw GNSS data with poor GNSS measurements, you can refer to our team's other dataset here (https://github.com/weisongwen/UrbanNavDataset).
2. BTW, you can also try the CA dataset directly using the GNSS loose solution via rostopic "/ublox_node/fix".

It can be good if you can present your issue in English which can be other users to track similar issues.

Thanks,

[weisongwen]

Closed, as no response for this issue.

[bryantaoli]

Thank you Dr.Wen, in Urbanloco website, the HK-Data20190426-1 cantains GNSS (RINEX) (GNSS Raw Data). But it cannot be clicked, could you please upload it, thank you agian.

[weisongwen]

Solved and closed. Feel free to re-open if necessary,

[bryantaoli]

Thank you Dr.Wen, in Urbanloco website, the HK-Data20190426-1 cantains GNSS (RINEX) (GNSS Raw Data). But it cannot be clicked, could you please upload it, thank you agian.

Thank @weisongwen to provide the RINEX file of HK-Data20190426-1. I upload it below: RINEX-HKDate20190426-1.zip