PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/07-21:57:50
G01     115.4          20.0               13.1 +/-    1.30      28.9 +/-    1.30  0.080 / 0.200
G07     95.3           60.3               12.3 +/-    0.29      14.0 +/-    0.29  0.090 / 0.210
G08     43.1           26.5                9.7 +/-    0.93      18.4 +/-    0.93  0.050 / 0.070
G09     176.6          22.8               14.8 +/-    1.93      30.3 +/-    1.93  0.040 / 0.070
G11     99.4           41.6               13.8 +/-    0.88      19.6 +/-    0.88  0.040 / 0.030
G13     315.4          23.0                8.3 +/-    1.83      17.0 +/-    1.83  0.030 / 0.040
G17     201.6          30.1               14.5 +/-    1.30      25.2 +/-    1.30  0.080 / 0.190
G18     86.7           21.7               12.5 +/-    0.86      26.5 +/-    0.86  0.080 / 0.160
G28     293.8          56.6               11.1 +/-    0.88      13.0 +/-    0.88  0.030 / 0.040
G30     354.5          72.1               11.6 +/-    0.91      12.1 +/-    0.91  0.050 / 0.050