PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-10:43:00
G01     72.5           33.1                3.0 +/-    1.26       5.0 +/-    1.26  0.060 / 0.070
G07     136.6          31.5                5.7 +/-    1.12       9.6 +/-    1.12  0.050 / 0.070
G11     53.8           30.7                3.4 +/-    2.15       5.8 +/-    2.15  0.080 / 0.080
G13     275.8          38.0                3.9 +/-    1.16       5.9 +/-    1.16  0.070 / 0.070
G15     308.0          12.3               -0.1 +/-    3.74      -0.3 +/-    3.74  0.040 / 0.030
G17     231.4          69.7                5.3 +/-    0.50       5.6 +/-    0.50  0.030 / 0.020
G18     49.0           17.9                3.2 +/-    3.73       7.5 +/-    3.73  0.090 / 0.110
G19     222.9          36.2                5.7 +/-    1.83       8.9 +/-    1.83  0.080 / 0.100
G28     15.1           60.0                4.6 +/-    0.82       5.2 +/-    0.82  0.080 / 0.190
G30     134.0          65.0                5.5 +/-    0.39       6.1 +/-    0.39  0.090 / 0.210