PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-02:58:20
G01     104.0          26.9                6.7 +/-    0.87      12.5 +/-    0.87  0.040 / 0.050
G07     112.6          53.3                4.3 +/-    0.39       5.2 +/-    0.39  0.030 / 0.050
G08     41.4           15.4                2.7 +/-    1.12       6.7 +/-    1.12  0.050 / 0.060
G09     173.3          10.0                4.6 +/-    1.42      12.7 +/-    1.42  0.050 / 0.060
G11     82.4           42.3                5.2 +/-    0.49       7.3 +/-    0.49  0.070 / 0.170
G13     306.9          30.9                3.1 +/-    2.28       5.3 +/-    2.28  0.060 / 0.150
G17     205.9          43.6                7.2 +/-    1.72       9.9 +/-    1.72  0.080 / 0.120
G18     73.1           23.3                2.7 +/-    0.55       5.5 +/-    0.55  0.060 / 0.140
G28     318.7          60.7                4.7 +/-    0.63       5.3 +/-    0.63  0.030 / 0.030
G30     31.1           79.4                4.9 +/-    0.44       5.0 +/-    0.44  0.030 / 0.030