PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-10:57:50
G01     77.9           33.3                4.7 +/-    0.83       7.7 +/-    0.83  0.030 / 0.030
G07     133.7          35.7                6.2 +/-    0.62       9.7 +/-    0.62  0.030 / 0.030
G11     57.2           33.7                3.2 +/-    0.92       5.1 +/-    0.92  0.040 / 0.080
G13     281.6          38.1                3.7 +/-    0.86       5.6 +/-    0.86  0.040 / 0.080
G15     311.9          10.7               -1.5 +/-   14.22      -4.2 +/-   14.22  0.060 / 0.110
G17     224.4          65.4                7.9 +/-    1.68       8.6 +/-    1.68  0.060 / 0.120
G18     52.8           20.0                2.6 +/-    2.09       5.7 +/-    2.09  0.070 / 0.120
G19     220.1          32.0                3.5 +/-    1.84       5.9 +/-    1.84  0.050 / 0.140
G28     7.0            60.8                3.9 +/-    0.48       4.4 +/-    0.48  0.090 / 0.230
G30     127.7          69.2                7.0 +/-    0.27       7.4 +/-    0.27  0.080 / 0.230