[FOSS-GPS] how to use *.sp3, *.clk, *.yyi in rtkpost with Kinematic mode

[Yanqing Hou]

Hi all,
I want to use the precise ephemeris (*.sp3), precise clock correction 
(*.clk), and ionospheric corrections (*.yyi) from IGS in resolving a 
baseline of about 200km. I tried to include the sp3 and clk files in the 
input dialogue, and chose the options in setting1 as:
Ionosphere Correction: IONEX TEC,
Satellite Ephemeris/Clock: Precise

I used only GPS constellation and continous mode to resolve ambiguities, 
but the precision of the baseline is still very low: the standard 
deviation of N/E/U is around 0.5m in each direction. I assume I did not 
use the sp3, clk, and ionex files correctly, because other people can 
have much better precision than mine with other softwares.

Is there anybody who has an experience of using these IGS products to 
process the baseline solutions?

Thanks,
Yanqing