PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-04:58:00
G01     109.8          24.0                8.4 +/-    2.18      16.7 +/-    2.18  0.040 / 0.040
G07     102.4          59.8                6.3 +/-    0.92       7.1 +/-    0.92  0.050 / 0.040
G08     42.3           22.5                2.4 +/-    2.31       5.0 +/-    2.31  0.150 / 0.190
G09     175.7          16.7                5.2 +/-    1.97      12.5 +/-    1.97  0.170 / 0.150
G11     93.8           42.1                6.0 +/-    0.60       8.5 +/-    0.60  0.070 / 0.070
G13     312.6          25.6                2.1 +/-    1.98       4.0 +/-    1.98  0.060 / 0.080
G17     204.6          35.9                6.9 +/-    0.87      10.8 +/-    0.87  0.080 / 0.120
G19     208.2          11.5                1.1 +/-    8.83       3.0 +/-    8.83  0.090 / 0.120
G28     313.7          60.6                3.3 +/-    0.95       3.7 +/-    0.95  0.030 / 0.030
G30     19.3           76.7                5.3 +/-    0.53       5.4 +/-    0.53  0.030 / 0.040