PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-05:27:50
G01     112.5          22.2                8.2 +/-    1.16      17.2 +/-    1.16  0.030 / 0.030
G07     98.8           60.6                6.8 +/-    0.75       7.6 +/-    0.75  0.030 / 0.030
G08     42.2           22.7                2.5 +/-    0.90       5.1 +/-    0.90  0.060 / 0.080
G09     173.7          16.2                6.5 +/-    0.49      15.7 +/-    0.49  0.050 / 0.080
G11     94.6           42.0                7.4 +/-    0.57      10.5 +/-    0.57  0.070 / 0.190
G13     313.5          25.3                5.2 +/-    1.67      10.1 +/-    1.67  0.060 / 0.190
G17     202.6          34.5                8.6 +/-    1.21      13.7 +/-    1.21  0.040 / 0.070
G28     303.2          58.9                5.1 +/-    0.71       5.8 +/-    0.71  0.040 / 0.070
G30     357.1          73.6                6.5 +/-    0.63       6.7 +/-    0.63  0.030 / 0.040