Question about JSON dataset

[Igor_Fedorov (Igor F)]

Hello,
Below you can see the point coordinates.
My questions:

1. In what quantities is the RMS measured “rms”: “0.00141306193467 0.00071638819671 0.00359942737768” (i mesured coordinates in angles)?
2. What is a latreral error? In what quantities is the lateral error measured?

Thanks
{
“type”: “FeatureCollection”,
“crs”: {
“type”: “name”,
“properties”: {
“name”: “urn:ogc:def:crs:OGC:1.3:CRS84”
}
},
“features”: [
{
“type”: “Feature”,
“properties”: {
“antenna height”: 1.7,
“lateral rms”: 0.0016,
“name”: “01”,
“projected mean”: “9.13933810521 57.0637153337 35.7873428571”,
“rms”: “0.00141306193467 0.00071638819671 0.00359942737768”,
“sample count”: 28,
“solution status”: “FIX”
},
“geometry”: {
“type”: “Point”,
“coordinates”: [
9.139338105214286,
57.06371533375,
35.78734285714286
]
}
}
]
}

[egor.fedorov]

The “rms” field is the RMSE of the coordinates. The three numbers are RMSE per axis(north, east, up).

“lateral rms” is the root mean square of RMSE values of the north and east axis.