PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-02:57:40
G01     126.0          12.2               -6.6 +/-   33.49     -17.4 +/-   33.49  0.030 / 0.040
G07     62.5           68.1                3.7 +/-    0.66       3.9 +/-    0.66  0.040 / 0.030
G08     48.3           36.1                1.5 +/-    0.50       2.3 +/-    0.50  0.080 / 0.350
G09     176.4          33.1                6.4 +/-    1.63      10.6 +/-    1.63  0.100 / 0.350
G11     114.8          36.4                5.4 +/-    0.77       8.4 +/-    0.77  0.110 / 0.300
G13     320.6          13.0               -0.8 +/-    9.49      -2.0 +/-    9.49  0.080 / 0.270
G17     198.9          18.4                5.4 +/-    1.15      12.5 +/-    1.15  0.120 / 0.300
G18     99.1           17.1                6.4 +/-    1.85      15.2 +/-    1.85  0.130 / 0.360
G28     275.4          51.9                4.6 +/-    0.95       5.7 +/-    0.95  0.040 / 0.040
G30     332.3          60.5                2.4 +/-    0.95       2.7 +/-    0.95  0.030 / 0.040