PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-02:57:50
G01     39.2           13.1                2.7 +/-    2.85       7.1 +/-    2.85  0.050 / 0.060
G02     198.8          14.0                5.9 +/-    3.26      15.1 +/-    3.26  0.060 / 0.070
G06     175.8          42.3                7.3 +/-    0.98      10.2 +/-    0.98  0.030 / 0.030
G13     234.8          19.1                5.2 +/-    4.39      11.7 +/-    4.39  0.030 / 0.030
G15     266.2          10.8                4.8 +/-    2.10      13.1 +/-    2.10  0.070 / 0.060
G17     6.1            68.0                3.6 +/-    0.49       3.8 +/-    0.49  0.080 / 0.070
G19     292.9          70.9                3.4 +/-    0.49       3.6 +/-    0.49  0.160 / 0.240
G24     315.3          22.2                2.9 +/-    2.58       6.1 +/-    2.58  0.110 / 0.290
G28     78.0           44.1                5.0 +/-    1.30       6.8 +/-    1.30  0.180 / 0.240
G30     154.4          19.4                6.5 +/-    1.98      14.4 +/-    1.98  0.260 / 0.350