PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-09:12:50
G01     99.0           28.0                5.9 +/-    2.31      10.8 +/-    2.31  0.030 / 0.030
G07     115.9          51.6                6.2 +/-    0.95       7.6 +/-    0.95  0.030 / 0.030
G08     41.8           17.4                2.9 +/-    0.94       6.8 +/-    0.94  0.030 / 0.050
G11     81.7           44.1                6.1 +/-    0.82       8.3 +/-    0.82  0.020 / 0.050
G13     303.6          33.4                5.3 +/-    1.67       8.6 +/-    1.67  0.040 / 0.090
G17     208.1          41.8                8.6 +/-    1.01      12.2 +/-    1.01  0.060 / 0.080
G18     72.9           24.7                5.0 +/-    0.96       9.9 +/-    0.96  0.050 / 0.130
G19     209.8          20.4                3.6 +/-    5.72       7.8 +/-    5.72  0.050 / 0.140
G28     315.4          59.4                5.8 +/-    0.79       6.6 +/-    0.79  0.120 / 0.210
G30     47.0           80.5                5.5 +/-    0.83       5.6 +/-    0.83  0.090 / 0.160