PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-10:12:50
G01     66.2           31.5                4.7 +/-    0.83       7.9 +/-    0.83  0.040 / 0.040
G07     138.4          27.0                6.5 +/-    1.16      12.1 +/-    1.16  0.040 / 0.040
G11     52.3           30.8                4.4 +/-    0.95       7.5 +/-    0.95  0.070 / 0.120
G13     269.8          38.2                8.6 +/-    1.54      12.9 +/-    1.54  0.060 / 0.110
G15     300.7          15.4                1.9 +/-    1.86       4.6 +/-    1.86  0.030 / 0.040
G17     235.1          69.1                6.3 +/-    0.92       6.6 +/-    0.92  0.030 / 0.040
G18     46.3           16.6                1.9 +/-    1.24       4.5 +/-    1.24  0.070 / 0.100
G19     225.2          46.4                6.2 +/-    0.88       8.2 +/-    0.88  0.060 / 0.120
G28     9.7            61.0                3.1 +/-    0.60       3.5 +/-    0.60  0.050 / 0.070
G30     138.6          61.1                7.4 +/-    0.59       8.4 +/-    0.59  0.050 / 0.090