root@rtk-base ~ # gpsprof 
gpsprof: 29783 looking for fix...first fix in 0.39sec, gathering 100 samples......(99.35 sec) done.
set terminal x11 size 800,950 
set termoption enhanced
set title noenhanced "2022-08-10T07:34:31, u-blox, 9600 8N1, cycle 1s, /dev/ttyACM0\nSW EXT CORE 3.01 (db0c89),HW 00080000\n\n"
set xlabel "Meters east from 11.418304100E"
set ylabel "Meters north from 53.599318100N"
cep=0.000000000
cep95=0.000000000
cep99=0.000000000
set autoscale
set multiplot
set size ratio -1 0.95,0.7
set origin 0.025,0.30
set format x "%.3f"
set format y "%.3f"
set key left at screen 0.6,0.30 vertical
set key noautotitle
set style line 2 pt 1
set style line 3 pt 2
set style line 5 pt 7 ps 1
set xtic rotate by -45
set border 15
set parametric
set trange [0:2*pi]
cx(t, r) = sin(t)*r
cy(t, r) = cos(t)*r
chlen = cep/20
set arrow from -chlen,0 to chlen,0 nohead
set arrow from 0,-chlen to 0,chlen nohead
set label 11 at screen 0.01, screen 0.30 "RCC 261-00\ncep = 0.000 meters\n2drms = 0.000 meters\nhep = 0.000 meters\nsep = 0.000 meters\nmrse = 0.000 meters\n2d max = 0.000 meters\n3d max = 0.000 meters"
set label 12 at screen 0.01, screen 0.12 "RCC 261-00\n\nLat\nLon\nAltHAE\nUsed"
set label 13 at screen 0.06, screen 0.12 "\n        mean\n  53.599318100N\n  11.418304100E\n        104.544\n           17.0"
set label 14 at screen 0.23, screen 0.12 "\n        min        max      sigma              skewness kurtosis\n    -0.000      0.000      0.000 meters        nan        nan\n    -0.000      0.000      0.000 meters        nan        nan\n     0.000      0.000      0.000 meters        nan        nan\n          16           17        0.1 sats"
set ytics nomirror
set y2tics
set format y2 "%.3f"
set y2label "AltHAE from 104.544 meters"
$EPData << EOD
0.000 0.000
0.000 -0.000
EOD
$EP95Data << EOD
0.000 0.000
0.000 -0.000
EOD
$EP99Data << EOD
0.000 0.000
0.000 -0.000
EOD
plot "-" using 1:2 with points ls 3 title "100 GPS fixes" , cx(t,cep),cy(t,cep) ls 1 title "CEP (50%) = 0.000 meters", cx(t,cep95),cy(t,cep95) title "CEP (95%) = 0.000 meters", cx(t,cep99),cy(t,cep99) title "CEP (99%) = 0.000 meters", "-" using ( 0.000 ):( $1 - 104.544 ) axes x1y2 with points ls 2 lc "green" title " 100 AltHAE fixes", $EPData using 1:2 axes x1y2 with points ls 5 lc "dark-green" title " EP(50%) = 0.000 meters", $EP95Data using 1:2 axes x1y2 with points ls 5 lc "blue" title " EP(95%) = 0.000 meters", $EP99Data using 1:2 axes x1y2 with points ls 5 lc "red" title " EP(99%) = 0.000 meters"
# Position uncertainty, 2022-08-10T07:34:31, u-blox, 9600 8N1, cycle 1s, /dev/ttyACM0\nSW EXT CORE 3.01 (db0c89),HW 00080000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
-0.000000000    -0.000000000
e
104.544000
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104.544000
104.544000
104.544000
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104.544000
104.544000
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104.544000