PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-07:57:40
G01     42.0           17.8                2.8 +/-    0.67       6.4 +/-    0.67  0.060 / 0.110
G06     175.5          36.6                7.4 +/-    1.11      11.4 +/-    1.11  0.070 / 0.110
G13     238.8          23.5                5.6 +/-    1.53      11.3 +/-    1.53  0.040 / 0.030
G15     275.0          12.5                5.7 +/-    1.78      15.0 +/-    1.78  0.040 / 0.030
G17     4.6            70.4                6.7 +/-    0.50       7.1 +/-    0.50  0.090 / 0.260
G19     266.6          65.6                4.9 +/-    0.58       5.3 +/-    0.58  0.100 / 0.350
G24     315.7          21.4                2.4 +/-    4.07       5.1 +/-    4.07  0.050 / 0.070
G28     67.1           49.1                6.5 +/-    0.53       8.3 +/-    0.53  0.050 / 0.060
G30     154.6          31.1                7.4 +/-    1.38      12.7 +/-    1.38  0.080 / 0.210