Open fgnievinski opened 4 years ago
I often do PPP with RTKLIB, so I would like to suggest to you:
Finally, and probably most important, check the precise products you are using. The satellites clock bias is not continous so if you want to use high rate observations you need high rate clock products. As far as I know the highest rate is 5 s, which is enough for 10 s observation rate but not optimal for 1 s.
Thanks for your suggestions.
I'm trying to detect small (decimeter level) displacements in a fishing platform, so I'd need to leave it kinematic instead of forcing it to static.
I've applied the SNR mask, it didn't seem to help much, perhaps because that site has 360-degree clear view of the sky.
I've enabled the (maybe auto should be the default), although it should create mostly a constant bias, not a scaling factor.
now I've used high-rate (1-second) clock products from CDDIS: https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/gnss_igsrtclk.html Unfortunately, the problem persists:
I was expecting that one would be just a higher resolution version the other, perhaps noisier, but with similar trajectories after low-pass filtering.
Mmh this is a strange behaviour... You have an observation file with sampling rate at 1 Hz and you simply select a different interval for the analysis, is it correct? I do not have any other suggestions for now...
when I change the sampling interval from ten seconds to one second the vertical coordinate is scaled by a factor of four -- for example, from 5 cm at 4h to 20cm at 4h (as per plots below). I'm also attaching the configuration file, renamed as a text file.
RS4427235643201909210000d-ppp0.conf.txt