PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-02:42:30
G01     75.7           33.3                3.5 +/-    1.03       5.7 +/-    1.03  0.030 / 0.030
G07     134.9          34.9                5.5 +/-    1.59       8.8 +/-    1.59  0.040 / 0.030
G11     58.5           34.9                1.9 +/-    0.99       2.9 +/-    0.99  0.030 / 0.060
G13     280.9          37.4                4.4 +/-    1.05       6.8 +/-    1.05  0.030 / 0.050
G15     305.4          14.9                1.0 +/-    3.30       2.6 +/-    3.30  0.060 / 0.080
G17     227.0          64.5                5.6 +/-    0.66       6.2 +/-    0.66  0.060 / 0.080
G19     221.4          38.9                7.1 +/-    2.00      10.6 +/-    2.00  0.060 / 0.090
G28     13.5           59.9                2.3 +/-    0.56       2.6 +/-    0.56  0.060 / 0.090
G30     130.7          61.7                6.5 +/-    0.36       7.3 +/-    0.36  0.070 / 0.120