GNSS Reference Station and Warning from CRCS.

Kits
1

While I got good results, I did get this warning. How do I, or should I correct it?

“SFE_Express_230315_204751.obs | Warning : No antenna type RINEX header record was found. Phase Centre Offsets and Variation could not be applied. Estimated height should be used with caution.”

The estimated coordinates ITRF20 2023-03-15 for the SFE_Express_230315_204751.obs RINEX file are as follows:

Latitude N40° 48’ 48.1069" ± 0.002 m (95%)

Longitude W89° 37’ 27.6295" ± 0.002 m (95%)

Ellipsoidal Height 196.298 m ± 0.010 m (95%)

Orthometric Height CGVD2013 CGG2013a 229.6962 m

[40.81336303,-89.62434151,196.298]

UTM Zone 16 (North)

Northing 4521353.361 m

Easting 278656.034 m

Scale factor (point) 1.00020306

Scale factor (combined) 1.00017227

[4521353.361,278656.034,196.298]

Cartesian coordinates

X 31695.829 ± 0.002 m (95%)

Y -4834207.935 ± 0.008 m (95%)

Z 4146886.948 ± 0.006 m (95%)

[31695.829,-4834207.935,4146886.948]

Orbits and Clocks Used: NRCan Ultra-rapid

GNSS Data: GPS & GLONASS

GRS80 ellipsoid used for (x,y,z) to (lat,lon,h) transformation

I’m using the GNSS L1/L2 Multi-Band Antenna - TOP106.

2

That looks like an error that gets thrown when the antenna type and offsets aren’t included in the upload - here’s a similar discussion https://community.emlid.com/t/rs2-ppp-p … ader/21106 (the ARP offsets are on a sticker on the antenna…put “none” or “*” or other wildcard for the antenna type and then include those offsets)

We have a guide here https://docs.sparkfun.com/SparkFun_RTK_ … x-to-rinex that might help as well

3

The emlid link was helpful since it showed where to add the antenna information to the .obs file I have recorded and sent off before. Here is the new info for comparison.

Latitude N40° 48’ 48.1069" ± 0.002 m (95%)

Longitude W89° 37’ 27.6295" ± 0.002 m (95%)

Ellipsoidal Height 196.304 m ± 0.010 m (95%)

Orthometric Height CGVD2013 CGG2013a 229.7022 m

[40.81336304,-89.62434152,196.304]

UTM Zone 16 (North)

Northing 4521353.361 m

Easting 278656.034 m

Scale factor (point) 1.00020306

Scale factor (combined) 1.00017226

[4521353.361,278656.034,196.304]

Cartesian coordinates

X 31695.829 ± 0.002 m (95%)

Y -4834207.939 ± 0.008 m (95%)

Z 4146886.952 ± 0.007 m (95%)

[31695.829,-4834207.939,4146886.952]

Orbits and Clocks Used: NRCan Rapid

GNSS Data: GPS & GLONASS

GRS80 ellipsoid used for (x,y,z) to (lat,lon,h) transformation